qgsprocessingwidgetwrapperimpl.cpp

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/***************************************************************************
                         qgsprocessingwidgetwrapperimpl.cpp
                         ---------------------
    begin                : August 2018
    copyright            : (C) 2018 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#include "qgsprocessingwidgetwrapperimpl.h"
#include "moc_qgsprocessingwidgetwrapperimpl.cpp"
#include "qgsprocessingparameters.h"
#include "processing/models/qgsprocessingmodelalgorithm.h"
#include "qgsprocessingoutputs.h"
#include "qgsprojectionselectionwidget.h"
#include "qgsprocessingmatrixparameterdialog.h"
#include "qgsspinbox.h"
#include "qgsdoublespinbox.h"
#include "qgsprocessingcontext.h"
#include "qgsauthconfigselect.h"
#include "qgsapplication.h"
#include "qgsfilewidget.h"
#include "qgssettings.h"
#include "qgsexpressionlineedit.h"
#include "qgsfieldexpressionwidget.h"
#include "qgsexpressionbuilderwidget.h"
#include "qgsprocessingmultipleselectiondialog.h"
#include "qgslayoutmanager.h"
#include "qgsproject.h"
#include "qgslayoutcombobox.h"
#include "qgslayoutitemcombobox.h"
#include "qgsprintlayout.h"
#include "qgsscalewidget.h"
#include "qgssnapindicator.h"
#include "qgsmapmouseevent.h"
#include "qgsfilterlineedit.h"
#include "qgsmapcanvas.h"
#include "qgsmessagebar.h"
#include "qgscolorbutton.h"
#include "qgscoordinateoperationwidget.h"
#include "qgsdatumtransformdialog.h"
#include "qgsfieldcombobox.h"
#include "qgsmapthemecollection.h"
#include "qgsdatetimeedit.h"
#include "qgsproviderconnectioncombobox.h"
#include "qgsdatabaseschemacombobox.h"
#include "qgsdatabasetablecombobox.h"
#include "qgsextentwidget.h"
#include "qgsprocessingenummodelerwidget.h"
#include "qgsprocessingmatrixmodelerwidget.h"
#include "qgsprocessingmaplayercombobox.h"
#include "qgsrasterbandcombobox.h"
#include "qgsprocessingoutputdestinationwidget.h"
#include "qgscheckablecombobox.h"
#include "qgsexpressioncontext.h"
#include "qgsdoublevalidator.h"
#include "qgsmaplayercombobox.h"
#include "qgsannotationlayer.h"
#include "qgspointcloudattributecombobox.h"
#include "qgspointcloudlayer.h"
#include "qgsprocessingpointcloudexpressionlineedit.h"
#include "qgsprocessingrastercalculatorexpressionlineedit.h"
#include "qgsunittypes.h"
#include "qgsgeometrywidget.h"
 
#include <QToolButton>
#include <QLabel>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QCheckBox>
#include <QComboBox>
#include <QLineEdit>
#include <QPlainTextEdit>
#include <QRadioButton>
#include <QButtonGroup>
#include <QMenu>
#include <QFileDialog>
 
 
//
// QgsProcessingBooleanWidgetWrapper
//
 
 
QgsProcessingBooleanParameterDefinitionWidget::QgsProcessingBooleanParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  mDefaultCheckBox = new QCheckBox( tr( "Checked" ) );
  if ( const QgsProcessingParameterBoolean *boolParam = dynamic_cast<const QgsProcessingParameterBoolean *>( definition ) )
    mDefaultCheckBox->setChecked( QgsProcessingParameters::parameterAsBool( boolParam, boolParam->defaultValueForGui(), context ) );
  else
    mDefaultCheckBox->setChecked( false );
  vlayout->addWidget( mDefaultCheckBox );
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingBooleanParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterBoolean>( name, description, mDefaultCheckBox->isChecked() );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingBooleanWidgetWrapper::QgsProcessingBooleanWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingBooleanWidgetWrapper::createWidget()
{
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      QString description = parameterDefinition()->description();
      if ( parameterDefinition()->flags() & Qgis::ProcessingParameterFlag::Optional )
        description = QObject::tr( "%1 [optional]" ).arg( description );
 
      mCheckBox = new QCheckBox( description );
      mCheckBox->setToolTip( parameterDefinition()->toolTip() );
 
      connect( mCheckBox, &QCheckBox::toggled, this, [=] {
        emit widgetValueHasChanged( this );
      } );
      return mCheckBox;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
    {
      mComboBox = new QComboBox();
      mComboBox->addItem( tr( "Yes" ), true );
      mComboBox->addItem( tr( "No" ), false );
      mComboBox->setToolTip( parameterDefinition()->toolTip() );
 
      connect( mComboBox, qOverload<int>( &QComboBox::currentIndexChanged ), this, [=] {
        emit widgetValueHasChanged( this );
      } );
 
      return mComboBox;
    }
  }
  return nullptr;
}
 
QLabel *QgsProcessingBooleanWidgetWrapper::createLabel()
{
  // avoid creating labels in standard dialogs
  if ( type() == QgsProcessingGui::Standard )
    return nullptr;
  else
    return QgsAbstractProcessingParameterWidgetWrapper::createLabel();
}
 
void QgsProcessingBooleanWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      const bool v = QgsProcessingParameters::parameterAsBool( parameterDefinition(), value, context );
      mCheckBox->setChecked( v );
      break;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
    {
      const bool v = QgsProcessingParameters::parameterAsBool( parameterDefinition(), value, context );
      mComboBox->setCurrentIndex( mComboBox->findData( v ) );
      break;
    }
  }
}
 
QVariant QgsProcessingBooleanWidgetWrapper::widgetValue() const
{
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
      return mCheckBox->isChecked();
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      return mComboBox->currentData();
  }
  return QVariant();
}
 
QStringList QgsProcessingBooleanWidgetWrapper::compatibleParameterTypes() const
{
  //pretty much everything is compatible here and can be converted to a bool!
  return QStringList() << QgsProcessingParameterBoolean::typeName()
                       << QgsProcessingParameterString::typeName()
                       << QgsProcessingParameterNumber::typeName()
                       << QgsProcessingParameterDistance::typeName()
                       << QgsProcessingParameterArea::typeName()
                       << QgsProcessingParameterVolume::typeName()
                       << QgsProcessingParameterDuration::typeName()
                       << QgsProcessingParameterScale::typeName()
                       << QgsProcessingParameterFile::typeName()
                       << QgsProcessingParameterField::typeName()
                       << QgsProcessingParameterFeatureSource::typeName()
                       << QgsProcessingParameterMapLayer::typeName()
                       << QgsProcessingParameterRasterLayer::typeName()
                       << QgsProcessingParameterVectorLayer::typeName()
                       << QgsProcessingParameterMeshLayer::typeName()
                       << QgsProcessingParameterExpression::typeName()
                       << QgsProcessingParameterProviderConnection::typeName()
                       << QgsProcessingParameterPointCloudLayer::typeName()
                       << QgsProcessingParameterAnnotationLayer::typeName();
}
 
QStringList QgsProcessingBooleanWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList() << QgsProcessingOutputNumber::typeName()
                       << QgsProcessingOutputMapLayer::typeName()
                       << QgsProcessingOutputFile::typeName()
                       << QgsProcessingOutputRasterLayer::typeName()
                       << QgsProcessingOutputVectorLayer::typeName()
                       << QgsProcessingOutputString::typeName()
                       << QgsProcessingOutputVariant::typeName()
                       << QgsProcessingOutputBoolean::typeName();
}
 
QString QgsProcessingBooleanWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterBoolean::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingBooleanWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingBooleanWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingBooleanWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingBooleanParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingCrsWidgetWrapper
//
 
QgsProcessingCrsParameterDefinitionWidget::QgsProcessingCrsParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mCrsSelector = new QgsProjectionSelectionWidget();
 
  // possibly we should expose this for parameter by parameter control
  mCrsSelector->setShowAccuracyWarnings( true );
 
  if ( const QgsProcessingParameterCrs *crsParam = dynamic_cast<const QgsProcessingParameterCrs *>( definition ) )
    mCrsSelector->setCrs( QgsProcessingParameters::parameterAsCrs( crsParam, crsParam->defaultValueForGui(), context ) );
  else
    mCrsSelector->setCrs( QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:4326" ) ) );
 
  vlayout->addWidget( mCrsSelector );
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingCrsParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterCrs>( name, description, mCrsSelector->crs().authid() );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingCrsWidgetWrapper::QgsProcessingCrsWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingCrsWidgetWrapper::createWidget()
{
  Q_ASSERT( mProjectionSelectionWidget == nullptr );
  mProjectionSelectionWidget = new QgsProjectionSelectionWidget();
  mProjectionSelectionWidget->setToolTip( parameterDefinition()->toolTip() );
 
  if ( parameterDefinition()->flags() & Qgis::ProcessingParameterFlag::Optional )
    mProjectionSelectionWidget->setOptionVisible( QgsProjectionSelectionWidget::CrsNotSet, true );
  else
    mProjectionSelectionWidget->setOptionVisible( QgsProjectionSelectionWidget::CrsNotSet, false );
 
  connect( mProjectionSelectionWidget, &QgsProjectionSelectionWidget::crsChanged, this, [=] {
    emit widgetValueHasChanged( this );
  } );
 
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      return mProjectionSelectionWidget;
    }
 
    case QgsProcessingGui::Modeler:
    {
      QWidget *w = new QWidget();
      w->setToolTip( parameterDefinition()->toolTip() );
 
      QVBoxLayout *vl = new QVBoxLayout();
      vl->setContentsMargins( 0, 0, 0, 0 );
      w->setLayout( vl );
 
      mUseProjectCrsCheckBox = new QCheckBox( tr( "Use project CRS" ) );
      mUseProjectCrsCheckBox->setToolTip( tr( "Always use the current project CRS when running the model" ) );
      vl->addWidget( mUseProjectCrsCheckBox );
      connect( mUseProjectCrsCheckBox, &QCheckBox::toggled, mProjectionSelectionWidget, &QgsProjectionSelectionWidget::setDisabled );
      connect( mUseProjectCrsCheckBox, &QCheckBox::toggled, this, [=] {
        emit widgetValueHasChanged( this );
      } );
 
      vl->addWidget( mProjectionSelectionWidget );
 
      return w;
    }
  }
  return nullptr;
}
 
void QgsProcessingCrsWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mUseProjectCrsCheckBox )
  {
    if ( value.toString().compare( QLatin1String( "ProjectCrs" ), Qt::CaseInsensitive ) == 0 )
    {
      mUseProjectCrsCheckBox->setChecked( true );
      return;
    }
    else
    {
      mUseProjectCrsCheckBox->setChecked( false );
    }
  }
 
  const QgsCoordinateReferenceSystem v = QgsProcessingParameters::parameterAsCrs( parameterDefinition(), value, context );
  if ( mProjectionSelectionWidget )
    mProjectionSelectionWidget->setCrs( v );
}
 
QVariant QgsProcessingCrsWidgetWrapper::widgetValue() const
{
  if ( mUseProjectCrsCheckBox && mUseProjectCrsCheckBox->isChecked() )
    return QStringLiteral( "ProjectCrs" );
  else if ( mProjectionSelectionWidget )
    return mProjectionSelectionWidget->crs().isValid() ? mProjectionSelectionWidget->crs() : QVariant();
  else
    return QVariant();
}
 
QStringList QgsProcessingCrsWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterCrs::typeName()
         << QgsProcessingParameterExpression::typeName()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterRasterLayer::typeName()
         << QgsProcessingParameterVectorLayer::typeName()
         << QgsProcessingParameterMeshLayer::typeName()
         << QgsProcessingParameterFeatureSource::typeName()
         << QgsProcessingParameterPointCloudLayer::typeName()
         << QgsProcessingParameterAnnotationLayer::typeName();
}
 
QStringList QgsProcessingCrsWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList() << QgsProcessingOutputVectorLayer::typeName()
                       << QgsProcessingOutputRasterLayer::typeName()
                       << QgsProcessingOutputMapLayer::typeName()
                       << QgsProcessingOutputString::typeName()
                       << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingCrsWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string as EPSG code, WKT or PROJ format, or a string identifying a map layer" );
}
 
QString QgsProcessingCrsWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterCrs::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingCrsWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingCrsWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingCrsWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingCrsParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingStringWidgetWrapper
//
 
 
QgsProcessingStringParameterDefinitionWidget::QgsProcessingStringParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultLineEdit = new QLineEdit();
  if ( const QgsProcessingParameterString *stringParam = dynamic_cast<const QgsProcessingParameterString *>( definition ) )
    mDefaultLineEdit->setText( QgsProcessingParameters::parameterAsString( stringParam, stringParam->defaultValueForGui(), context ) );
  vlayout->addWidget( mDefaultLineEdit );
 
  mMultiLineCheckBox = new QCheckBox( tr( "Multiline input" ) );
  if ( const QgsProcessingParameterString *stringParam = dynamic_cast<const QgsProcessingParameterString *>( definition ) )
    mMultiLineCheckBox->setChecked( stringParam->multiLine() );
  vlayout->addWidget( mMultiLineCheckBox );
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingStringParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterString>( name, description, mDefaultLineEdit->text(), mMultiLineCheckBox->isChecked() );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingStringWidgetWrapper::QgsProcessingStringWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingStringWidgetWrapper::createWidget()
{
  const QVariantMap metadata = parameterDefinition()->metadata();
  const QVariant valueHintsVariant = metadata.value( QStringLiteral( "widget_wrapper" ) ).toMap().value( QStringLiteral( "value_hints" ) );
 
  if ( valueHintsVariant.isValid() )
  {
    const QVariantList valueList = valueHintsVariant.toList();
    mComboBox = new QComboBox();
    mComboBox->setToolTip( parameterDefinition()->toolTip() );
 
    if ( parameterDefinition()->flags() & Qgis::ProcessingParameterFlag::Optional )
    {
      mComboBox->addItem( QString() );
    }
    for ( const QVariant &entry : valueList )
    {
      mComboBox->addItem( entry.toString(), entry.toString() );
    }
    mComboBox->setCurrentIndex( 0 );
 
    connect( mComboBox, qOverload<int>( &QComboBox::currentIndexChanged ), this, [=]( int ) {
      emit widgetValueHasChanged( this );
    } );
    return mComboBox;
  }
  else
  {
    switch ( type() )
    {
      case QgsProcessingGui::Standard:
      case QgsProcessingGui::Modeler:
      {
        if ( static_cast<const QgsProcessingParameterString *>( parameterDefinition() )->multiLine() )
        {
          mPlainTextEdit = new QPlainTextEdit();
          mPlainTextEdit->setToolTip( parameterDefinition()->toolTip() );
 
          connect( mPlainTextEdit, &QPlainTextEdit::textChanged, this, [=] {
            emit widgetValueHasChanged( this );
          } );
          return mPlainTextEdit;
        }
        else
        {
          mLineEdit = new QLineEdit();
          mLineEdit->setToolTip( parameterDefinition()->toolTip() );
 
          connect( mLineEdit, &QLineEdit::textChanged, this, [=] {
            emit widgetValueHasChanged( this );
          } );
          return mLineEdit;
        }
      }
 
      case QgsProcessingGui::Batch:
      {
        mLineEdit = new QLineEdit();
        mLineEdit->setToolTip( parameterDefinition()->toolTip() );
 
        connect( mLineEdit, &QLineEdit::textChanged, this, [=] {
          emit widgetValueHasChanged( this );
        } );
        return mLineEdit;
      }
    }
  }
 
  return nullptr;
}
 
void QgsProcessingStringWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
  if ( mLineEdit )
    mLineEdit->setText( v );
  if ( mPlainTextEdit )
    mPlainTextEdit->setPlainText( v );
  if ( mComboBox )
  {
    int index = -1;
    if ( !value.isValid() )
      index = mComboBox->findData( QVariant() );
    else
      index = mComboBox->findData( v );
 
    if ( index >= 0 )
      mComboBox->setCurrentIndex( index );
    else
      mComboBox->setCurrentIndex( 0 );
  }
}
 
QVariant QgsProcessingStringWidgetWrapper::widgetValue() const
{
  if ( mLineEdit )
    return mLineEdit->text();
  else if ( mPlainTextEdit )
    return mPlainTextEdit->toPlainText();
  else if ( mComboBox )
    return mComboBox->currentData();
  else
    return QVariant();
}
 
QStringList QgsProcessingStringWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterAuthConfig::typeName()
         << QgsProcessingParameterNumber::typeName()
         << QgsProcessingParameterDistance::typeName()
         << QgsProcessingParameterArea::typeName()
         << QgsProcessingParameterVolume::typeName()
         << QgsProcessingParameterDuration::typeName()
         << QgsProcessingParameterScale::typeName()
         << QgsProcessingParameterFile::typeName()
         << QgsProcessingParameterField::typeName()
         << QgsProcessingParameterExpression::typeName()
         << QgsProcessingParameterCoordinateOperation::typeName()
         << QgsProcessingParameterProviderConnection::typeName();
}
 
QStringList QgsProcessingStringWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList() << QgsProcessingOutputNumber::typeName()
                       << QgsProcessingOutputVariant::typeName()
                       << QgsProcessingOutputFile::typeName()
                       << QgsProcessingOutputFolder::typeName()
                       << QgsProcessingOutputString::typeName();
}
 
QString QgsProcessingStringWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterString::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingStringWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingStringWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingStringWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingStringParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingAuthConfigWidgetWrapper
//
 
QgsProcessingAuthConfigWidgetWrapper::QgsProcessingAuthConfigWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingAuthConfigWidgetWrapper::createWidget()
{
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Modeler:
    case QgsProcessingGui::Batch:
    {
      mAuthConfigSelect = new QgsAuthConfigSelect();
      mAuthConfigSelect->setToolTip( parameterDefinition()->toolTip() );
 
      connect( mAuthConfigSelect, &QgsAuthConfigSelect::selectedConfigIdChanged, this, [=] {
        emit widgetValueHasChanged( this );
      } );
      return mAuthConfigSelect;
    }
  }
  return nullptr;
}
 
void QgsProcessingAuthConfigWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
  if ( mAuthConfigSelect )
    mAuthConfigSelect->setConfigId( v );
}
 
QVariant QgsProcessingAuthConfigWidgetWrapper::widgetValue() const
{
  if ( mAuthConfigSelect )
    return mAuthConfigSelect->configId();
  else
    return QVariant();
}
 
QStringList QgsProcessingAuthConfigWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterAuthConfig::typeName()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterExpression::typeName();
}
 
QStringList QgsProcessingAuthConfigWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList() << QgsProcessingOutputString::typeName()
                       << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingAuthConfigWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterAuthConfig::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingAuthConfigWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingAuthConfigWidgetWrapper( parameter, type );
}
 
//
// QgsProcessingNumericWidgetWrapper
//
 
QgsProcessingNumberParameterDefinitionWidget::QgsProcessingNumberParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Number type" ) ) );
 
  mTypeComboBox = new QComboBox();
  mTypeComboBox->addItem( tr( "Float" ), static_cast<int>( Qgis::ProcessingNumberParameterType::Double ) );
  mTypeComboBox->addItem( tr( "Integer" ), static_cast<int>( Qgis::ProcessingNumberParameterType::Integer ) );
  vlayout->addWidget( mTypeComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Minimum value" ) ) );
  mMinLineEdit = new QLineEdit();
  vlayout->addWidget( mMinLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Maximum value" ) ) );
  mMaxLineEdit = new QLineEdit();
  vlayout->addWidget( mMaxLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
  mDefaultLineEdit = new QLineEdit();
  vlayout->addWidget( mDefaultLineEdit );
 
  if ( const QgsProcessingParameterNumber *numberParam = dynamic_cast<const QgsProcessingParameterNumber *>( definition ) )
  {
    mTypeComboBox->setCurrentIndex( mTypeComboBox->findData( static_cast<int>( numberParam->dataType() ) ) );
 
    if ( !qgsDoubleNear( numberParam->maximum(), std::numeric_limits<double>::max() ) )
    {
      mMaxLineEdit->setText( QLocale().toString( numberParam->maximum() ) );
    }
    else
    {
      mMaxLineEdit->clear();
    }
 
    if ( !qgsDoubleNear( numberParam->minimum(), std::numeric_limits<double>::lowest() ) )
    {
      mMinLineEdit->setText( QLocale().toString( numberParam->minimum() ) );
    }
    else
    {
      mMinLineEdit->clear();
    }
 
    mDefaultLineEdit->setText( numberParam->defaultValueForGui().toString() );
  }
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingNumberParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  bool ok;
  double val = QgsDoubleValidator::toDouble( mDefaultLineEdit->text(), &ok );
 
  Qgis::ProcessingNumberParameterType dataType = static_cast<Qgis::ProcessingNumberParameterType>( mTypeComboBox->currentData().toInt() );
  auto param = std::make_unique<QgsProcessingParameterNumber>( name, description, dataType, ok ? val : QVariant() );
 
  if ( !mMinLineEdit->text().trimmed().isEmpty() )
  {
    val = QgsDoubleValidator::toDouble( mMinLineEdit->text(), &ok );
    if ( ok )
    {
      param->setMinimum( val );
    }
  }
 
  if ( !mMaxLineEdit->text().trimmed().isEmpty() )
  {
    val = QgsDoubleValidator::toDouble( mMaxLineEdit->text(), &ok );
    if ( ok )
    {
      param->setMaximum( val );
    }
  }
 
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingNumericWidgetWrapper::QgsProcessingNumericWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingNumericWidgetWrapper::createWidget()
{
  const QgsProcessingParameterNumber *numberDef = static_cast<const QgsProcessingParameterNumber *>( parameterDefinition() );
  const QVariantMap metadata = numberDef->metadata();
  const int decimals = metadata.value( QStringLiteral( "widget_wrapper" ) ).toMap().value( QStringLiteral( "decimals" ), 6 ).toInt();
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Modeler:
    case QgsProcessingGui::Batch:
    {
      // lots of duplicate code here -- but there's no common interface between QSpinBox/QDoubleSpinBox which would allow us to avoid this
      QAbstractSpinBox *spinBox = nullptr;
      switch ( numberDef->dataType() )
      {
        case Qgis::ProcessingNumberParameterType::Double:
          mDoubleSpinBox = new QgsDoubleSpinBox();
          mDoubleSpinBox->setExpressionsEnabled( true );
          mDoubleSpinBox->setDecimals( decimals );
 
          // guess reasonable step value for double spin boxes
          if ( !qgsDoubleNear( numberDef->maximum(), std::numeric_limits<double>::max() ) && !qgsDoubleNear( numberDef->minimum(), std::numeric_limits<double>::lowest() + 1 ) )
          {
            double singleStep = calculateStep( numberDef->minimum(), numberDef->maximum() );
            singleStep = std::max( singleStep, std::pow( 10, -decimals ) );
            mDoubleSpinBox->setSingleStep( singleStep );
          }
 
          spinBox = mDoubleSpinBox;
          break;
 
        case Qgis::ProcessingNumberParameterType::Integer:
          mSpinBox = new QgsSpinBox();
          mSpinBox->setExpressionsEnabled( true );
          spinBox = mSpinBox;
          break;
      }
      spinBox->setToolTip( parameterDefinition()->toolTip() );
 
      double max = 999999999;
      if ( !qgsDoubleNear( numberDef->maximum(), std::numeric_limits<double>::max() ) )
      {
        max = numberDef->maximum();
      }
      double min = -999999999;
      if ( !qgsDoubleNear( numberDef->minimum(), std::numeric_limits<double>::lowest() ) )
      {
        min = numberDef->minimum();
      }
      if ( mDoubleSpinBox )
      {
        mDoubleSpinBox->setMinimum( min );
        mDoubleSpinBox->setMaximum( max );
      }
      else
      {
        mSpinBox->setMinimum( static_cast<int>( min ) );
        mSpinBox->setMaximum( static_cast<int>( max ) );
      }
 
      if ( numberDef->flags() & Qgis::ProcessingParameterFlag::Optional )
      {
        mAllowingNull = true;
        if ( mDoubleSpinBox )
        {
          mDoubleSpinBox->setShowClearButton( true );
          const double min = mDoubleSpinBox->minimum() - mDoubleSpinBox->singleStep();
          mDoubleSpinBox->setMinimum( min );
          mDoubleSpinBox->setValue( min );
        }
        else
        {
          mSpinBox->setShowClearButton( true );
          const int min = mSpinBox->minimum() - 1;
          mSpinBox->setMinimum( min );
          mSpinBox->setValue( min );
        }
        spinBox->setSpecialValueText( tr( "Not set" ) );
      }
      else
      {
        if ( numberDef->defaultValueForGui().isValid() )
        {
          // if default value for parameter, we clear to that
          bool ok = false;
          if ( mDoubleSpinBox )
          {
            double defaultVal = numberDef->defaultValueForGui().toDouble( &ok );
            if ( ok )
              mDoubleSpinBox->setClearValue( defaultVal );
          }
          else
          {
            int intVal = numberDef->defaultValueForGui().toInt( &ok );
            if ( ok )
              mSpinBox->setClearValue( intVal );
          }
        }
        else if ( !qgsDoubleNear( numberDef->minimum(), std::numeric_limits<double>::lowest() ) )
        {
          // otherwise we clear to the minimum, if it's set
          if ( mDoubleSpinBox )
            mDoubleSpinBox->setClearValue( numberDef->minimum() );
          else
            mSpinBox->setClearValue( static_cast<int>( numberDef->minimum() ) );
        }
        else
        {
          // last resort, we clear to 0
          if ( mDoubleSpinBox )
          {
            mDoubleSpinBox->setValue( 0 );
            mDoubleSpinBox->setClearValue( 0 );
          }
          else
          {
            mSpinBox->setValue( 0 );
            mSpinBox->setClearValue( 0 );
          }
        }
      }
 
      if ( mDoubleSpinBox )
        connect( mDoubleSpinBox, qOverload<double>( &QgsDoubleSpinBox::valueChanged ), this, [=] { emit widgetValueHasChanged( this ); } );
      else if ( mSpinBox )
        connect( mSpinBox, qOverload<int>( &QgsSpinBox::valueChanged ), this, [=] { emit widgetValueHasChanged( this ); } );
 
      return spinBox;
    }
  }
  return nullptr;
}
 
void QgsProcessingNumericWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mDoubleSpinBox )
  {
    if ( mAllowingNull && !value.isValid() )
      mDoubleSpinBox->clear();
    else
    {
      const double v = QgsProcessingParameters::parameterAsDouble( parameterDefinition(), value, context );
      mDoubleSpinBox->setValue( v );
    }
  }
  else if ( mSpinBox )
  {
    if ( mAllowingNull && !value.isValid() )
      mSpinBox->clear();
    else
    {
      const int v = QgsProcessingParameters::parameterAsInt( parameterDefinition(), value, context );
      mSpinBox->setValue( v );
    }
  }
}
 
QVariant QgsProcessingNumericWidgetWrapper::widgetValue() const
{
  if ( mDoubleSpinBox )
  {
    if ( mAllowingNull && qgsDoubleNear( mDoubleSpinBox->value(), mDoubleSpinBox->minimum() ) )
      return QVariant();
    else
      return mDoubleSpinBox->value();
  }
  else if ( mSpinBox )
  {
    if ( mAllowingNull && mSpinBox->value() == mSpinBox->minimum() )
      return QVariant();
    else
      return mSpinBox->value();
  }
  else
    return QVariant();
}
 
QStringList QgsProcessingNumericWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterNumber::typeName()
         << QgsProcessingParameterDistance::typeName()
         << QgsProcessingParameterVolume::typeName()
         << QgsProcessingParameterDuration::typeName()
         << QgsProcessingParameterScale::typeName();
}
 
QStringList QgsProcessingNumericWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList() << QgsProcessingOutputNumber::typeName()
                       << QgsProcessingOutputVariant::typeName()
                       << QgsProcessingOutputString::typeName();
}
 
double QgsProcessingNumericWidgetWrapper::calculateStep( const double minimum, const double maximum )
{
  const double valueRange = maximum - minimum;
  if ( valueRange <= 1.0 )
  {
    const double step = valueRange / 10.0;
    // round to 1 significant figure
    return qgsRound( step, -std::floor( std::log( step ) ) );
  }
  else
  {
    return 1.0;
  }
}
 
QString QgsProcessingNumericWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterNumber::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingNumericWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingNumericWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingNumericWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingNumberParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
//
// QgsProcessingDistanceWidgetWrapper
//
 
QgsProcessingDistanceParameterDefinitionWidget::QgsProcessingDistanceParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Linked input" ) ) );
 
  mParentLayerComboBox = new QComboBox();
 
  QString initialParent;
  if ( const QgsProcessingParameterDistance *distParam = dynamic_cast<const QgsProcessingParameterDistance *>( definition ) )
    initialParent = distParam->parentParameterName();
 
  if ( auto *lModel = widgetContext.model() )
  {
    // populate combo box with other model input choices
    const QMap<QString, QgsProcessingModelParameter> components = lModel->parameterComponents();
    for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
    {
      if ( const QgsProcessingParameterFeatureSource *definition = dynamic_cast<const QgsProcessingParameterFeatureSource *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterVectorLayer *definition = dynamic_cast<const QgsProcessingParameterVectorLayer *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterMapLayer *definition = dynamic_cast<const QgsProcessingParameterMapLayer *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterCrs *definition = dynamic_cast<const QgsProcessingParameterCrs *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
    }
  }
 
  if ( mParentLayerComboBox->count() == 0 && !initialParent.isEmpty() )
  {
    // if no parent candidates found, we just add the existing one as a placeholder
    mParentLayerComboBox->addItem( initialParent, initialParent );
    mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
  }
 
  vlayout->addWidget( mParentLayerComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Minimum value" ) ) );
  mMinLineEdit = new QLineEdit();
  vlayout->addWidget( mMinLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Maximum value" ) ) );
  mMaxLineEdit = new QLineEdit();
  vlayout->addWidget( mMaxLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
  mDefaultLineEdit = new QLineEdit();
  vlayout->addWidget( mDefaultLineEdit );
 
  if ( const QgsProcessingParameterDistance *distParam = dynamic_cast<const QgsProcessingParameterDistance *>( definition ) )
  {
    mMinLineEdit->setText( QLocale().toString( distParam->minimum() ) );
    mMaxLineEdit->setText( QLocale().toString( distParam->maximum() ) );
    mDefaultLineEdit->setText( distParam->defaultValueForGui().toString() );
  }
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingDistanceParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  bool ok;
  double val = QgsDoubleValidator::toDouble( mDefaultLineEdit->text(), &ok );
 
  auto param = std::make_unique<QgsProcessingParameterDistance>( name, description, ok ? val : QVariant(), mParentLayerComboBox->currentData().toString() );
 
  val = QgsDoubleValidator::toDouble( mMinLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMinimum( val );
  }
 
  val = QgsDoubleValidator::toDouble( mMaxLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMaximum( val );
  }
 
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingDistanceWidgetWrapper::QgsProcessingDistanceWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsProcessingNumericWidgetWrapper( parameter, type, parent )
{
}
 
QString QgsProcessingDistanceWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterDistance::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingDistanceWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingDistanceWidgetWrapper( parameter, type );
}
 
QWidget *QgsProcessingDistanceWidgetWrapper::createWidget()
{
  const QgsProcessingParameterDistance *distanceDef = static_cast<const QgsProcessingParameterDistance *>( parameterDefinition() );
 
  QWidget *spin = QgsProcessingNumericWidgetWrapper::createWidget();
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      mLabel = new QLabel();
      mUnitsCombo = new QComboBox();
 
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Meters ), static_cast<int>( Qgis::DistanceUnit::Meters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Kilometers ), static_cast<int>( Qgis::DistanceUnit::Kilometers ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Feet ), static_cast<int>( Qgis::DistanceUnit::Feet ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Yards ), static_cast<int>( Qgis::DistanceUnit::Yards ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Miles ), static_cast<int>( Qgis::DistanceUnit::Miles ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::NauticalMiles ), static_cast<int>( Qgis::DistanceUnit::NauticalMiles ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Centimeters ), static_cast<int>( Qgis::DistanceUnit::Centimeters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Millimeters ), static_cast<int>( Qgis::DistanceUnit::Millimeters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::DistanceUnit::Inches ), static_cast<int>( Qgis::DistanceUnit::Inches ) );
 
      const int labelMargin = static_cast<int>( std::round( mUnitsCombo->fontMetrics().horizontalAdvance( 'X' ) ) );
      QHBoxLayout *layout = new QHBoxLayout();
      layout->addWidget( spin, 1 );
      layout->insertSpacing( 1, labelMargin / 2 );
      layout->insertWidget( 2, mLabel );
      layout->insertWidget( 3, mUnitsCombo );
 
      // bit of fiddlyness here -- we want the initial spacing to only be visible
      // when the warning label is shown, so it's embedded inside mWarningLabel
      // instead of outside it
      mWarningLabel = new QWidget();
      QHBoxLayout *warningLayout = new QHBoxLayout();
      warningLayout->setContentsMargins( 0, 0, 0, 0 );
      QLabel *warning = new QLabel();
      QIcon icon = QgsApplication::getThemeIcon( QStringLiteral( "mIconWarning.svg" ) );
      const int size = static_cast<int>( std::max( 24.0, spin->minimumSize().height() * 0.5 ) );
      warning->setPixmap( icon.pixmap( icon.actualSize( QSize( size, size ) ) ) );
      warning->setToolTip( tr( "Distance is in geographic degrees. Consider reprojecting to a projected local coordinate system for accurate results." ) );
      warningLayout->insertSpacing( 0, labelMargin / 2 );
      warningLayout->insertWidget( 1, warning );
      mWarningLabel->setLayout( warningLayout );
      layout->insertWidget( 4, mWarningLabel );
 
      QWidget *w = new QWidget();
      layout->setContentsMargins( 0, 0, 0, 0 );
      w->setLayout( layout );
 
      setUnits( distanceDef->defaultUnit() );
 
      return w;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      return spin;
  }
  return nullptr;
}
 
void QgsProcessingDistanceWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
{
  QgsProcessingNumericWidgetWrapper::postInitialize( wrappers );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      for ( const QgsAbstractProcessingParameterWidgetWrapper *wrapper : wrappers )
      {
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterDistance *>( parameterDefinition() )->parentParameterName() )
        {
          setUnitParameterValue( wrapper->parameterValue(), wrapper );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setUnitParameterValue( wrapper->parameterValue(), wrapper );
          } );
          break;
        }
      }
      break;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      break;
  }
}
 
void QgsProcessingDistanceWidgetWrapper::setUnitParameterValue( const QVariant &value, const QgsAbstractProcessingParameterWidgetWrapper *wrapper )
{
  Qgis::DistanceUnit units = Qgis::DistanceUnit::Unknown;
 
  // evaluate value to layer
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  const QgsCoordinateReferenceSystem crs = wrapper
                                             ? QgsProcessingParameters::parameterAsCrs( wrapper->parameterDefinition(), wrapper->parameterValue(), *context )
                                             : QgsProcessingUtils::variantToCrs( value, *context );
  if ( crs.isValid() )
  {
    units = crs.mapUnits();
  }
 
  setUnits( units );
}
 
void QgsProcessingDistanceWidgetWrapper::setUnits( Qgis::DistanceUnit units )
{
  mLabel->setText( QgsUnitTypes::toString( units ) );
  if ( QgsUnitTypes::unitType( units ) != Qgis::DistanceUnitType::Standard )
  {
    mUnitsCombo->hide();
    mLabel->show();
  }
  else
  {
    mUnitsCombo->setCurrentIndex( mUnitsCombo->findData( static_cast<int>( units ) ) );
    mUnitsCombo->show();
    mLabel->hide();
  }
  mWarningLabel->setVisible( units == Qgis::DistanceUnit::Degrees );
  mBaseUnit = units;
}
 
QVariant QgsProcessingDistanceWidgetWrapper::widgetValue() const
{
  const QVariant val = QgsProcessingNumericWidgetWrapper::widgetValue();
  if ( val.userType() == QMetaType::Type::Double && mUnitsCombo && mUnitsCombo->isVisible() )
  {
    Qgis::DistanceUnit displayUnit = static_cast<Qgis::DistanceUnit>( mUnitsCombo->currentData().toInt() );
    return val.toDouble() * QgsUnitTypes::fromUnitToUnitFactor( displayUnit, mBaseUnit );
  }
  else
  {
    return val;
  }
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingDistanceWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingDistanceParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingAreaParameterDefinitionWidget
//
 
QgsProcessingAreaParameterDefinitionWidget::QgsProcessingAreaParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Linked input" ) ) );
 
  mParentLayerComboBox = new QComboBox();
 
  QString initialParent;
  if ( const QgsProcessingParameterArea *areaParam = dynamic_cast<const QgsProcessingParameterArea *>( definition ) )
    initialParent = areaParam->parentParameterName();
 
  if ( auto *lModel = widgetContext.model() )
  {
    // populate combo box with other model input choices
    const QMap<QString, QgsProcessingModelParameter> components = lModel->parameterComponents();
    for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
    {
      if ( const QgsProcessingParameterFeatureSource *definition = dynamic_cast<const QgsProcessingParameterFeatureSource *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterVectorLayer *definition = dynamic_cast<const QgsProcessingParameterVectorLayer *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterMapLayer *definition = dynamic_cast<const QgsProcessingParameterMapLayer *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterCrs *definition = dynamic_cast<const QgsProcessingParameterCrs *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
    }
  }
 
  if ( mParentLayerComboBox->count() == 0 && !initialParent.isEmpty() )
  {
    // if no parent candidates found, we just add the existing one as a placeholder
    mParentLayerComboBox->addItem( initialParent, initialParent );
    mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
  }
 
  vlayout->addWidget( mParentLayerComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Minimum value" ) ) );
  mMinLineEdit = new QLineEdit();
  vlayout->addWidget( mMinLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Maximum value" ) ) );
  mMaxLineEdit = new QLineEdit();
  vlayout->addWidget( mMaxLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
  mDefaultLineEdit = new QLineEdit();
  vlayout->addWidget( mDefaultLineEdit );
 
  if ( const QgsProcessingParameterArea *areaParam = dynamic_cast<const QgsProcessingParameterArea *>( definition ) )
  {
    mMinLineEdit->setText( QLocale().toString( areaParam->minimum() ) );
    mMaxLineEdit->setText( QLocale().toString( areaParam->maximum() ) );
    mDefaultLineEdit->setText( areaParam->defaultValueForGui().toString() );
  }
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingAreaParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  bool ok;
  double val = QgsDoubleValidator::toDouble( mDefaultLineEdit->text(), &ok );
 
  auto param = std::make_unique<QgsProcessingParameterArea>( name, description, ok ? val : QVariant(), mParentLayerComboBox->currentData().toString() );
 
  val = QgsDoubleValidator::toDouble( mMinLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMinimum( val );
  }
 
  val = QgsDoubleValidator::toDouble( mMaxLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMaximum( val );
  }
 
  param->setFlags( flags );
  return param.release();
}
 
 
//
// QgsProcessingAreaWidgetWrapper
//
 
QgsProcessingAreaWidgetWrapper::QgsProcessingAreaWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsProcessingNumericWidgetWrapper( parameter, type, parent )
{
}
 
QString QgsProcessingAreaWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterArea::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingAreaWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingAreaWidgetWrapper( parameter, type );
}
 
QWidget *QgsProcessingAreaWidgetWrapper::createWidget()
{
  const QgsProcessingParameterArea *areaDef = static_cast<const QgsProcessingParameterArea *>( parameterDefinition() );
 
  QWidget *spin = QgsProcessingNumericWidgetWrapper::createWidget();
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      mLabel = new QLabel();
      mUnitsCombo = new QComboBox();
 
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareMeters ), QVariant::fromValue( Qgis::AreaUnit::SquareMeters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareKilometers ), QVariant::fromValue( Qgis::AreaUnit::SquareKilometers ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareFeet ), QVariant::fromValue( Qgis::AreaUnit::SquareFeet ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareYards ), QVariant::fromValue( Qgis::AreaUnit::SquareYards ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareMiles ), QVariant::fromValue( Qgis::AreaUnit::SquareMiles ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::Hectares ), QVariant::fromValue( Qgis::AreaUnit::Hectares ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::Acres ), QVariant::fromValue( Qgis::AreaUnit::Acres ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareNauticalMiles ), QVariant::fromValue( Qgis::AreaUnit::SquareNauticalMiles ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareDegrees ), QVariant::fromValue( Qgis::AreaUnit::SquareDegrees ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareCentimeters ), QVariant::fromValue( Qgis::AreaUnit::SquareCentimeters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareMillimeters ), QVariant::fromValue( Qgis::AreaUnit::SquareMillimeters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::AreaUnit::SquareInches ), QVariant::fromValue( Qgis::AreaUnit::SquareInches ) );
 
      const int labelMargin = static_cast<int>( std::round( mUnitsCombo->fontMetrics().horizontalAdvance( 'X' ) ) );
      QHBoxLayout *layout = new QHBoxLayout();
      layout->addWidget( spin, 1 );
      layout->insertSpacing( 1, labelMargin / 2 );
      layout->insertWidget( 2, mLabel );
      layout->insertWidget( 3, mUnitsCombo );
 
      // bit of fiddlyness here -- we want the initial spacing to only be visible
      // when the warning label is shown, so it's embedded inside mWarningLabel
      // instead of outside it
      mWarningLabel = new QWidget();
      QHBoxLayout *warningLayout = new QHBoxLayout();
      warningLayout->setContentsMargins( 0, 0, 0, 0 );
      QLabel *warning = new QLabel();
      QIcon icon = QgsApplication::getThemeIcon( QStringLiteral( "mIconWarning.svg" ) );
      const int size = static_cast<int>( std::max( 24.0, spin->minimumSize().height() * 0.5 ) );
      warning->setPixmap( icon.pixmap( icon.actualSize( QSize( size, size ) ) ) );
      warning->setToolTip( tr( "Area is in geographic degrees. Consider reprojecting to a projected local coordinate system for accurate results." ) );
      warningLayout->insertSpacing( 0, labelMargin / 2 );
      warningLayout->insertWidget( 1, warning );
      mWarningLabel->setLayout( warningLayout );
      layout->insertWidget( 4, mWarningLabel );
 
      QWidget *w = new QWidget();
      layout->setContentsMargins( 0, 0, 0, 0 );
      w->setLayout( layout );
 
      setUnits( areaDef->defaultUnit() );
 
      return w;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      return spin;
  }
  return nullptr;
}
 
void QgsProcessingAreaWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
{
  QgsProcessingNumericWidgetWrapper::postInitialize( wrappers );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      for ( const QgsAbstractProcessingParameterWidgetWrapper *wrapper : wrappers )
      {
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterArea *>( parameterDefinition() )->parentParameterName() )
        {
          setUnitParameterValue( wrapper->parameterValue(), wrapper );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setUnitParameterValue( wrapper->parameterValue(), wrapper );
          } );
          break;
        }
      }
      break;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      break;
  }
}
 
void QgsProcessingAreaWidgetWrapper::setUnitParameterValue( const QVariant &value, const QgsAbstractProcessingParameterWidgetWrapper *wrapper )
{
  Qgis::AreaUnit units = Qgis::AreaUnit::Unknown;
 
  // evaluate value to layer
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  const QgsCoordinateReferenceSystem crs = wrapper
                                             ? QgsProcessingParameters::parameterAsCrs( wrapper->parameterDefinition(), wrapper->parameterValue(), *context )
                                             : QgsProcessingUtils::variantToCrs( value, *context );
  if ( crs.isValid() )
  {
    units = QgsUnitTypes::distanceToAreaUnit( crs.mapUnits() );
  }
 
  setUnits( units );
}
 
void QgsProcessingAreaWidgetWrapper::setUnits( Qgis::AreaUnit units )
{
  mLabel->setText( QgsUnitTypes::toString( units ) );
  if ( QgsUnitTypes::unitType( units ) != Qgis::DistanceUnitType::Standard )
  {
    mUnitsCombo->hide();
    mLabel->show();
  }
  else
  {
    mUnitsCombo->setCurrentIndex( mUnitsCombo->findData( QVariant::fromValue( units ) ) );
    mUnitsCombo->show();
    mLabel->hide();
  }
  mWarningLabel->setVisible( units == Qgis::AreaUnit::SquareDegrees );
  mBaseUnit = units;
}
 
QVariant QgsProcessingAreaWidgetWrapper::widgetValue() const
{
  const QVariant val = QgsProcessingNumericWidgetWrapper::widgetValue();
  if ( val.userType() == QMetaType::Type::Double && mUnitsCombo && mUnitsCombo->isVisible() )
  {
    const Qgis::AreaUnit displayUnit = mUnitsCombo->currentData().value<Qgis::AreaUnit>();
    return val.toDouble() * QgsUnitTypes::fromUnitToUnitFactor( displayUnit, mBaseUnit );
  }
  else
  {
    return val;
  }
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingAreaWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingAreaParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingVolumeParameterDefinitionWidget
//
 
QgsProcessingVolumeParameterDefinitionWidget::QgsProcessingVolumeParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Linked input" ) ) );
 
  mParentLayerComboBox = new QComboBox();
 
  QString initialParent;
  if ( const QgsProcessingParameterVolume *volumeParam = dynamic_cast<const QgsProcessingParameterVolume *>( definition ) )
    initialParent = volumeParam->parentParameterName();
 
  if ( auto *lModel = widgetContext.model() )
  {
    // populate combo box with other model input choices
    const QMap<QString, QgsProcessingModelParameter> components = lModel->parameterComponents();
    for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
    {
      if ( const QgsProcessingParameterFeatureSource *definition = dynamic_cast<const QgsProcessingParameterFeatureSource *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterVectorLayer *definition = dynamic_cast<const QgsProcessingParameterVectorLayer *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterMapLayer *definition = dynamic_cast<const QgsProcessingParameterMapLayer *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterCrs *definition = dynamic_cast<const QgsProcessingParameterCrs *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
    }
  }
 
  if ( mParentLayerComboBox->count() == 0 && !initialParent.isEmpty() )
  {
    // if no parent candidates found, we just add the existing one as a placeholder
    mParentLayerComboBox->addItem( initialParent, initialParent );
    mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
  }
 
  vlayout->addWidget( mParentLayerComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Minimum value" ) ) );
  mMinLineEdit = new QLineEdit();
  vlayout->addWidget( mMinLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Maximum value" ) ) );
  mMaxLineEdit = new QLineEdit();
  vlayout->addWidget( mMaxLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
  mDefaultLineEdit = new QLineEdit();
  vlayout->addWidget( mDefaultLineEdit );
 
  if ( const QgsProcessingParameterVolume *volumeParam = dynamic_cast<const QgsProcessingParameterVolume *>( definition ) )
  {
    mMinLineEdit->setText( QLocale().toString( volumeParam->minimum() ) );
    mMaxLineEdit->setText( QLocale().toString( volumeParam->maximum() ) );
    mDefaultLineEdit->setText( volumeParam->defaultValueForGui().toString() );
  }
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingVolumeParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  bool ok;
  double val = QgsDoubleValidator::toDouble( mDefaultLineEdit->text(), &ok );
 
  auto param = std::make_unique<QgsProcessingParameterVolume>( name, description, ok ? val : QVariant(), mParentLayerComboBox->currentData().toString() );
 
  val = QgsDoubleValidator::toDouble( mMinLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMinimum( val );
  }
 
  val = QgsDoubleValidator::toDouble( mMaxLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMaximum( val );
  }
 
  param->setFlags( flags );
  return param.release();
}
 
 
//
// QgsProcessingVolumeWidgetWrapper
//
 
QgsProcessingVolumeWidgetWrapper::QgsProcessingVolumeWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsProcessingNumericWidgetWrapper( parameter, type, parent )
{
}
 
QString QgsProcessingVolumeWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterVolume::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingVolumeWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingVolumeWidgetWrapper( parameter, type );
}
 
QWidget *QgsProcessingVolumeWidgetWrapper::createWidget()
{
  const QgsProcessingParameterVolume *volumeDef = static_cast<const QgsProcessingParameterVolume *>( parameterDefinition() );
 
  QWidget *spin = QgsProcessingNumericWidgetWrapper::createWidget();
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      mLabel = new QLabel();
      mUnitsCombo = new QComboBox();
 
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::CubicMeters ), QVariant::fromValue( Qgis::VolumeUnit::CubicMeters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::CubicFeet ), QVariant::fromValue( Qgis::VolumeUnit::CubicFeet ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::CubicYards ), QVariant::fromValue( Qgis::VolumeUnit::CubicYards ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::Barrel ), QVariant::fromValue( Qgis::VolumeUnit::Barrel ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::CubicDecimeter ), QVariant::fromValue( Qgis::VolumeUnit::CubicDecimeter ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::Liters ), QVariant::fromValue( Qgis::VolumeUnit::Liters ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::GallonUS ), QVariant::fromValue( Qgis::VolumeUnit::GallonUS ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::CubicInch ), QVariant::fromValue( Qgis::VolumeUnit::CubicInch ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::CubicCentimeter ), QVariant::fromValue( Qgis::VolumeUnit::CubicCentimeter ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::VolumeUnit::CubicDegrees ), QVariant::fromValue( Qgis::VolumeUnit::CubicDegrees ) );
 
      const int labelMargin = static_cast<int>( std::round( mUnitsCombo->fontMetrics().horizontalAdvance( 'X' ) ) );
      QHBoxLayout *layout = new QHBoxLayout();
      layout->addWidget( spin, 1 );
      layout->insertSpacing( 1, labelMargin / 2 );
      layout->insertWidget( 2, mLabel );
      layout->insertWidget( 3, mUnitsCombo );
 
      // bit of fiddlyness here -- we want the initial spacing to only be visible
      // when the warning label is shown, so it's embedded inside mWarningLabel
      // instead of outside it
      mWarningLabel = new QWidget();
      QHBoxLayout *warningLayout = new QHBoxLayout();
      warningLayout->setContentsMargins( 0, 0, 0, 0 );
      QLabel *warning = new QLabel();
      QIcon icon = QgsApplication::getThemeIcon( QStringLiteral( "mIconWarning.svg" ) );
      const int size = static_cast<int>( std::max( 24.0, spin->minimumSize().height() * 0.5 ) );
      warning->setPixmap( icon.pixmap( icon.actualSize( QSize( size, size ) ) ) );
      warning->setToolTip( tr( "Volume is in geographic degrees. Consider reprojecting to a projected local coordinate system for accurate results." ) );
      warningLayout->insertSpacing( 0, labelMargin / 2 );
      warningLayout->insertWidget( 1, warning );
      mWarningLabel->setLayout( warningLayout );
      layout->insertWidget( 4, mWarningLabel );
 
      QWidget *w = new QWidget();
      layout->setContentsMargins( 0, 0, 0, 0 );
      w->setLayout( layout );
 
      setUnits( volumeDef->defaultUnit() );
 
      return w;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      return spin;
  }
  return nullptr;
}
 
void QgsProcessingVolumeWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
{
  QgsProcessingNumericWidgetWrapper::postInitialize( wrappers );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      for ( const QgsAbstractProcessingParameterWidgetWrapper *wrapper : wrappers )
      {
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterVolume *>( parameterDefinition() )->parentParameterName() )
        {
          setUnitParameterValue( wrapper->parameterValue(), wrapper );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setUnitParameterValue( wrapper->parameterValue(), wrapper );
          } );
          break;
        }
      }
      break;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      break;
  }
}
 
void QgsProcessingVolumeWidgetWrapper::setUnitParameterValue( const QVariant &value, const QgsAbstractProcessingParameterWidgetWrapper *wrapper )
{
  Qgis::VolumeUnit units = Qgis::VolumeUnit::Unknown;
 
  // evaluate value to layer
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  const QgsCoordinateReferenceSystem crs = wrapper
                                             ? QgsProcessingParameters::parameterAsCrs( wrapper->parameterDefinition(), wrapper->parameterValue(), *context )
                                             : QgsProcessingUtils::variantToCrs( value, *context );
  if ( crs.isValid() )
  {
    units = QgsUnitTypes::distanceToVolumeUnit( crs.mapUnits() );
  }
 
  setUnits( units );
}
 
void QgsProcessingVolumeWidgetWrapper::setUnits( Qgis::VolumeUnit units )
{
  mLabel->setText( QgsUnitTypes::toString( units ) );
  if ( QgsUnitTypes::unitType( units ) != Qgis::DistanceUnitType::Standard )
  {
    mUnitsCombo->hide();
    mLabel->show();
  }
  else
  {
    mUnitsCombo->setCurrentIndex( mUnitsCombo->findData( QVariant::fromValue( units ) ) );
    mUnitsCombo->show();
    mLabel->hide();
  }
  mWarningLabel->setVisible( units == Qgis::VolumeUnit::CubicDegrees );
  mBaseUnit = units;
}
 
QVariant QgsProcessingVolumeWidgetWrapper::widgetValue() const
{
  const QVariant val = QgsProcessingNumericWidgetWrapper::widgetValue();
  if ( val.userType() == QMetaType::Type::Double && mUnitsCombo && mUnitsCombo->isVisible() )
  {
    const Qgis::VolumeUnit displayUnit = mUnitsCombo->currentData().value<Qgis::VolumeUnit>();
    return val.toDouble() * QgsUnitTypes::fromUnitToUnitFactor( displayUnit, mBaseUnit );
  }
  else
  {
    return val;
  }
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingVolumeWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingVolumeParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingDurationWidgetWrapper
//
 
QgsProcessingDurationParameterDefinitionWidget::QgsProcessingDurationParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Minimum value" ) ) );
  mMinLineEdit = new QLineEdit();
  vlayout->addWidget( mMinLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Maximum value" ) ) );
  mMaxLineEdit = new QLineEdit();
  vlayout->addWidget( mMaxLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
  mDefaultLineEdit = new QLineEdit();
  vlayout->addWidget( mDefaultLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Default unit type" ) ) );
 
  mUnitsCombo = new QComboBox();
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Milliseconds ), static_cast<int>( Qgis::TemporalUnit::Milliseconds ) );
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Seconds ), static_cast<int>( Qgis::TemporalUnit::Seconds ) );
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Minutes ), static_cast<int>( Qgis::TemporalUnit::Minutes ) );
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Hours ), static_cast<int>( Qgis::TemporalUnit::Hours ) );
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Days ), static_cast<int>( Qgis::TemporalUnit::Days ) );
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Weeks ), static_cast<int>( Qgis::TemporalUnit::Weeks ) );
  mUnitsCombo->addItem( tr( "years (365.25 days)" ), static_cast<int>( Qgis::TemporalUnit::Years ) );
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Decades ), static_cast<int>( Qgis::TemporalUnit::Decades ) );
  mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Centuries ), static_cast<int>( Qgis::TemporalUnit::Centuries ) );
  vlayout->addWidget( mUnitsCombo );
 
  if ( const QgsProcessingParameterDuration *durationParam = dynamic_cast<const QgsProcessingParameterDuration *>( definition ) )
  {
    mMinLineEdit->setText( QLocale().toString( durationParam->minimum() ) );
    mMaxLineEdit->setText( QLocale().toString( durationParam->maximum() ) );
    mDefaultLineEdit->setText( durationParam->defaultValueForGui().toString() );
    mUnitsCombo->setCurrentIndex( mUnitsCombo->findData( static_cast<int>( durationParam->defaultUnit() ) ) );
  }
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingDurationParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  bool ok;
  double val = QgsDoubleValidator::toDouble( mDefaultLineEdit->text(), &ok );
 
  auto param = std::make_unique<QgsProcessingParameterDuration>( name, description, ok ? val : QVariant() );
 
  val = QgsDoubleValidator::toDouble( mMinLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMinimum( val );
  }
 
  val = QgsDoubleValidator::toDouble( mMaxLineEdit->text(), &ok );
  if ( ok )
  {
    param->setMaximum( val );
  }
 
  param->setDefaultUnit( static_cast<Qgis::TemporalUnit>( mUnitsCombo->currentData().toInt() ) );
 
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingDurationWidgetWrapper::QgsProcessingDurationWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsProcessingNumericWidgetWrapper( parameter, type, parent )
{
}
 
QString QgsProcessingDurationWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterDuration::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingDurationWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingDurationWidgetWrapper( parameter, type );
}
 
QWidget *QgsProcessingDurationWidgetWrapper::createWidget()
{
  const QgsProcessingParameterDuration *durationDef = static_cast<const QgsProcessingParameterDuration *>( parameterDefinition() );
 
  QWidget *spin = QgsProcessingNumericWidgetWrapper::createWidget();
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      mUnitsCombo = new QComboBox();
 
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Milliseconds ), static_cast<int>( Qgis::TemporalUnit::Milliseconds ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Seconds ), static_cast<int>( Qgis::TemporalUnit::Seconds ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Minutes ), static_cast<int>( Qgis::TemporalUnit::Minutes ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Hours ), static_cast<int>( Qgis::TemporalUnit::Hours ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Days ), static_cast<int>( Qgis::TemporalUnit::Days ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Weeks ), static_cast<int>( Qgis::TemporalUnit::Weeks ) );
      mUnitsCombo->addItem( tr( "years (365.25 days)" ), static_cast<int>( Qgis::TemporalUnit::Years ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Decades ), static_cast<int>( Qgis::TemporalUnit::Decades ) );
      mUnitsCombo->addItem( QgsUnitTypes::toString( Qgis::TemporalUnit::Centuries ), static_cast<int>( Qgis::TemporalUnit::Centuries ) );
 
      QHBoxLayout *layout = new QHBoxLayout();
      layout->addWidget( spin, 1 );
      layout->insertWidget( 1, mUnitsCombo );
 
      QWidget *w = new QWidget();
      layout->setContentsMargins( 0, 0, 0, 0 );
      w->setLayout( layout );
 
      mUnitsCombo->setCurrentIndex( mUnitsCombo->findData( static_cast<int>( durationDef->defaultUnit() ) ) );
      mUnitsCombo->show();
 
      return w;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
      return spin;
  }
  return nullptr;
}
 
QLabel *QgsProcessingDurationWidgetWrapper::createLabel()
{
  QLabel *label = QgsAbstractProcessingParameterWidgetWrapper::createLabel();
 
  if ( type() == QgsProcessingGui::Modeler )
  {
    label->setText( QStringLiteral( "%1 [%2]" ).arg( label->text(), QgsUnitTypes::toString( mBaseUnit ) ) );
  }
 
  return label;
}
 
QVariant QgsProcessingDurationWidgetWrapper::widgetValue() const
{
  const QVariant val = QgsProcessingNumericWidgetWrapper::widgetValue();
  if ( val.userType() == QMetaType::Type::Double && mUnitsCombo )
  {
    Qgis::TemporalUnit displayUnit = static_cast<Qgis::TemporalUnit>( mUnitsCombo->currentData().toInt() );
    return val.toDouble() * QgsUnitTypes::fromUnitToUnitFactor( displayUnit, mBaseUnit );
  }
  else
  {
    return val;
  }
}
 
void QgsProcessingDurationWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mUnitsCombo )
  {
    Qgis::TemporalUnit displayUnit = static_cast<Qgis::TemporalUnit>( mUnitsCombo->currentData().toInt() );
    const QVariant val = value.toDouble() * QgsUnitTypes::fromUnitToUnitFactor( mBaseUnit, displayUnit );
    QgsProcessingNumericWidgetWrapper::setWidgetValue( val, context );
  }
  else
  {
    QgsProcessingNumericWidgetWrapper::setWidgetValue( value, context );
  }
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingDurationWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingDurationParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
//
// QgsProcessingScaleWidgetWrapper
//
 
QgsProcessingScaleParameterDefinitionWidget::QgsProcessingScaleParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultLineEdit = new QLineEdit();
 
  if ( const QgsProcessingParameterScale *scaleParam = dynamic_cast<const QgsProcessingParameterScale *>( definition ) )
  {
    mDefaultLineEdit->setText( scaleParam->defaultValueForGui().toString() );
  }
 
  vlayout->addWidget( mDefaultLineEdit );
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingScaleParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  bool ok;
  double val = mDefaultLineEdit->text().toDouble( &ok );
  auto param = std::make_unique<QgsProcessingParameterScale>( name, description, ok ? val : QVariant() );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingScaleWidgetWrapper::QgsProcessingScaleWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsProcessingNumericWidgetWrapper( parameter, type, parent )
{
}
 
QString QgsProcessingScaleWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterScale::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingScaleWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingScaleWidgetWrapper( parameter, type );
}
 
QWidget *QgsProcessingScaleWidgetWrapper::createWidget()
{
  const QgsProcessingParameterScale *scaleDef = static_cast<const QgsProcessingParameterScale *>( parameterDefinition() );
 
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
    {
      mScaleWidget = new QgsScaleWidget( nullptr );
      if ( scaleDef->flags() & Qgis::ProcessingParameterFlag::Optional )
        mScaleWidget->setAllowNull( true );
 
      mScaleWidget->setMapCanvas( widgetContext().mapCanvas() );
      mScaleWidget->setShowCurrentScaleButton( true );
 
      mScaleWidget->setToolTip( parameterDefinition()->toolTip() );
      connect( mScaleWidget, &QgsScaleWidget::scaleChanged, this, [=]( double ) {
        emit widgetValueHasChanged( this );
      } );
      return mScaleWidget;
    }
  }
  return nullptr;
}
 
void QgsProcessingScaleWidgetWrapper::setWidgetContext( const QgsProcessingParameterWidgetContext &context )
{
  if ( mScaleWidget )
    mScaleWidget->setMapCanvas( context.mapCanvas() );
  QgsAbstractProcessingParameterWidgetWrapper::setWidgetContext( context );
}
 
 
QVariant QgsProcessingScaleWidgetWrapper::widgetValue() const
{
  return mScaleWidget && !mScaleWidget->isNull() ? QVariant( mScaleWidget->scale() ) : QVariant();
}
 
void QgsProcessingScaleWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mScaleWidget )
  {
    if ( mScaleWidget->allowNull() && !value.isValid() )
      mScaleWidget->setNull();
    else
    {
      const double v = QgsProcessingParameters::parameterAsDouble( parameterDefinition(), value, context );
      mScaleWidget->setScale( v );
    }
  }
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingScaleWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingScaleParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingRangeWidgetWrapper
//
 
QgsProcessingRangeParameterDefinitionWidget::QgsProcessingRangeParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Number type" ) ) );
 
  mTypeComboBox = new QComboBox();
  mTypeComboBox->addItem( tr( "Float" ), static_cast<int>( Qgis::ProcessingNumberParameterType::Double ) );
  mTypeComboBox->addItem( tr( "Integer" ), static_cast<int>( Qgis::ProcessingNumberParameterType::Integer ) );
  vlayout->addWidget( mTypeComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Minimum value" ) ) );
  mMinLineEdit = new QLineEdit();
  vlayout->addWidget( mMinLineEdit );
 
  vlayout->addWidget( new QLabel( tr( "Maximum value" ) ) );
  mMaxLineEdit = new QLineEdit();
  vlayout->addWidget( mMaxLineEdit );
 
  if ( const QgsProcessingParameterRange *rangeParam = dynamic_cast<const QgsProcessingParameterRange *>( definition ) )
  {
    mTypeComboBox->setCurrentIndex( mTypeComboBox->findData( static_cast<int>( rangeParam->dataType() ) ) );
    const QList<double> range = QgsProcessingParameters::parameterAsRange( rangeParam, rangeParam->defaultValueForGui(), context );
    mMinLineEdit->setText( QLocale().toString( range.at( 0 ) ) );
    mMaxLineEdit->setText( QLocale().toString( range.at( 1 ) ) );
  }
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingRangeParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  QString defaultValue;
  if ( mMinLineEdit->text().isEmpty() )
  {
    defaultValue = QStringLiteral( "None" );
  }
  else
  {
    bool ok;
    defaultValue = QString::number( QgsDoubleValidator::toDouble( mMinLineEdit->text(), &ok ) );
    if ( !ok )
    {
      defaultValue = QStringLiteral( "None" );
    }
  }
 
  if ( mMaxLineEdit->text().isEmpty() )
  {
    defaultValue += QLatin1String( ",None" );
  }
  else
  {
    bool ok;
    const double val { QgsDoubleValidator::toDouble( mMaxLineEdit->text(), &ok ) };
    defaultValue += QStringLiteral( ",%1" ).arg( ok ? QString::number( val ) : QLatin1String( "None" ) );
  }
 
  Qgis::ProcessingNumberParameterType dataType = static_cast<Qgis::ProcessingNumberParameterType>( mTypeComboBox->currentData().toInt() );
  auto param = std::make_unique<QgsProcessingParameterRange>( name, description, dataType, defaultValue );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingRangeWidgetWrapper::QgsProcessingRangeWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingRangeWidgetWrapper::createWidget()
{
  const QgsProcessingParameterRange *rangeDef = static_cast<const QgsProcessingParameterRange *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Modeler:
    case QgsProcessingGui::Batch:
    {
      QHBoxLayout *layout = new QHBoxLayout();
 
      mMinSpinBox = new QgsDoubleSpinBox();
      mMaxSpinBox = new QgsDoubleSpinBox();
 
      mMinSpinBox->setExpressionsEnabled( true );
      mMinSpinBox->setShowClearButton( false );
      mMaxSpinBox->setExpressionsEnabled( true );
      mMaxSpinBox->setShowClearButton( false );
 
      QLabel *minLabel = new QLabel( tr( "Min" ) );
      layout->addWidget( minLabel );
      layout->addWidget( mMinSpinBox, 1 );
 
      QLabel *maxLabel = new QLabel( tr( "Max" ) );
      layout->addWidget( maxLabel );
      layout->addWidget( mMaxSpinBox, 1 );
 
      QWidget *w = new QWidget();
      layout->setContentsMargins( 0, 0, 0, 0 );
      w->setLayout( layout );
 
      if ( rangeDef->dataType() == Qgis::ProcessingNumberParameterType::Double )
      {
        mMinSpinBox->setDecimals( 6 );
        mMaxSpinBox->setDecimals( 6 );
      }
      else
      {
        mMinSpinBox->setDecimals( 0 );
        mMaxSpinBox->setDecimals( 0 );
      }
 
      mMinSpinBox->setMinimum( -99999999.999999 );
      mMaxSpinBox->setMinimum( -99999999.999999 );
      mMinSpinBox->setMaximum( 99999999.999999 );
      mMaxSpinBox->setMaximum( 99999999.999999 );
 
      if ( rangeDef->flags() & Qgis::ProcessingParameterFlag::Optional )
      {
        mAllowingNull = true;
 
        const double min = mMinSpinBox->minimum() - 1;
        mMinSpinBox->setMinimum( min );
        mMaxSpinBox->setMinimum( min );
        mMinSpinBox->setValue( min );
        mMaxSpinBox->setValue( min );
 
        mMinSpinBox->setShowClearButton( true );
        mMaxSpinBox->setShowClearButton( true );
        mMinSpinBox->setSpecialValueText( tr( "Not set" ) );
        mMaxSpinBox->setSpecialValueText( tr( "Not set" ) );
      }
 
      w->setToolTip( parameterDefinition()->toolTip() );
 
      connect( mMinSpinBox, qOverload<double>( &QgsDoubleSpinBox::valueChanged ), this, [=]( const double v ) {
        mBlockChangedSignal++;
        if ( !mAllowingNull && v > mMaxSpinBox->value() )
          mMaxSpinBox->setValue( v );
        mBlockChangedSignal--;
 
        if ( !mBlockChangedSignal )
          emit widgetValueHasChanged( this );
      } );
      connect( mMaxSpinBox, qOverload<double>( &QgsDoubleSpinBox::valueChanged ), this, [=]( const double v ) {
        mBlockChangedSignal++;
        if ( !mAllowingNull && v < mMinSpinBox->value() )
          mMinSpinBox->setValue( v );
        mBlockChangedSignal--;
 
        if ( !mBlockChangedSignal )
          emit widgetValueHasChanged( this );
      } );
 
      return w;
    }
  }
  return nullptr;
}
 
void QgsProcessingRangeWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  const QList<double> v = QgsProcessingParameters::parameterAsRange( parameterDefinition(), value, context );
  if ( mAllowingNull && v.empty() )
  {
    mMinSpinBox->clear();
    mMaxSpinBox->clear();
  }
  else
  {
    if ( v.empty() )
      return;
 
    if ( mAllowingNull )
    {
      mBlockChangedSignal++;
      if ( std::isnan( v.at( 0 ) ) )
        mMinSpinBox->clear();
      else
        mMinSpinBox->setValue( v.at( 0 ) );
 
      if ( v.count() >= 2 )
      {
        if ( std::isnan( v.at( 1 ) ) )
          mMaxSpinBox->clear();
        else
          mMaxSpinBox->setValue( v.at( 1 ) );
      }
      mBlockChangedSignal--;
    }
    else
    {
      mBlockChangedSignal++;
      mMinSpinBox->setValue( v.at( 0 ) );
      if ( v.count() >= 2 )
        mMaxSpinBox->setValue( v.at( 1 ) );
      mBlockChangedSignal--;
    }
  }
 
  if ( !mBlockChangedSignal )
    emit widgetValueHasChanged( this );
}
 
QVariant QgsProcessingRangeWidgetWrapper::widgetValue() const
{
  if ( mAllowingNull )
  {
    QString value;
    if ( qgsDoubleNear( mMinSpinBox->value(), mMinSpinBox->minimum() ) )
      value = QStringLiteral( "None" );
    else
      value = QString::number( mMinSpinBox->value() );
 
    if ( qgsDoubleNear( mMaxSpinBox->value(), mMaxSpinBox->minimum() ) )
      value += QLatin1String( ",None" );
    else
      value += QStringLiteral( ",%1" ).arg( mMaxSpinBox->value() );
 
    return value;
  }
  else
    return QStringLiteral( "%1,%2" ).arg( mMinSpinBox->value() ).arg( mMaxSpinBox->value() );
}
 
QStringList QgsProcessingRangeWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterRange::typeName()
         << QgsProcessingParameterString::typeName();
}
 
QStringList QgsProcessingRangeWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList() << QgsProcessingOutputString::typeName()
                       << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingRangeWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string as two comma delimited floats, e.g. '1,10'" );
}
 
QString QgsProcessingRangeWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterRange::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingRangeWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingRangeWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingRangeWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingRangeParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingMatrixWidgetWrapper
//
 
QgsProcessingMatrixParameterDefinitionWidget::QgsProcessingMatrixParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  mMatrixWidget = new QgsProcessingMatrixModelerWidget();
  if ( const QgsProcessingParameterMatrix *matrixParam = dynamic_cast<const QgsProcessingParameterMatrix *>( definition ) )
  {
    mMatrixWidget->setValue( matrixParam->headers(), matrixParam->defaultValueForGui() );
    mMatrixWidget->setFixedRows( matrixParam->hasFixedNumberRows() );
  }
  vlayout->addWidget( mMatrixWidget );
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingMatrixParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterMatrix>( name, description, 1, mMatrixWidget->fixedRows(), mMatrixWidget->headers(), mMatrixWidget->value() );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingMatrixWidgetWrapper::QgsProcessingMatrixWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingMatrixWidgetWrapper::createWidget()
{
  mMatrixWidget = new QgsProcessingMatrixParameterPanel( nullptr, dynamic_cast<const QgsProcessingParameterMatrix *>( parameterDefinition() ) );
  mMatrixWidget->setToolTip( parameterDefinition()->toolTip() );
 
  connect( mMatrixWidget, &QgsProcessingMatrixParameterPanel::changed, this, [=] {
    emit widgetValueHasChanged( this );
  } );
 
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
    {
      return mMatrixWidget;
    }
  }
  return nullptr;
}
 
void QgsProcessingMatrixWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  const QVariantList v = QgsProcessingParameters::parameterAsMatrix( parameterDefinition(), value, context );
  if ( mMatrixWidget )
    mMatrixWidget->setValue( v );
}
 
QVariant QgsProcessingMatrixWidgetWrapper::widgetValue() const
{
  if ( mMatrixWidget )
    return mMatrixWidget->value().isEmpty() ? QVariant() : mMatrixWidget->value();
  else
    return QVariant();
}
 
QStringList QgsProcessingMatrixWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterMatrix::typeName();
}
 
QStringList QgsProcessingMatrixWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList();
}
 
QString QgsProcessingMatrixWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "comma delimited string of values, or an array of values" );
}
 
QString QgsProcessingMatrixWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterMatrix::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingMatrixWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingMatrixWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingMatrixWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingMatrixParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingFileWidgetWrapper
//
 
 
QgsProcessingFileParameterDefinitionWidget::QgsProcessingFileParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Type" ) ) );
 
  mTypeComboBox = new QComboBox();
  mTypeComboBox->addItem( tr( "File" ), static_cast<int>( Qgis::ProcessingFileParameterBehavior::File ) );
  mTypeComboBox->addItem( tr( "Folder" ), static_cast<int>( Qgis::ProcessingFileParameterBehavior::Folder ) );
  if ( const QgsProcessingParameterFile *fileParam = dynamic_cast<const QgsProcessingParameterFile *>( definition ) )
    mTypeComboBox->setCurrentIndex( mTypeComboBox->findData( static_cast<int>( fileParam->behavior() ) ) );
  else
    mTypeComboBox->setCurrentIndex( 0 );
  vlayout->addWidget( mTypeComboBox );
 
  vlayout->addWidget( new QLabel( tr( "File filter" ) ) );
 
  mFilterComboBox = new QComboBox();
  mFilterComboBox->setEditable( true );
  // add some standard ones -- these also act as a demonstration of the required format
  mFilterComboBox->addItem( tr( "All Files (*.*)" ) );
  mFilterComboBox->addItem( tr( "CSV Files (*.csv)" ) );
  mFilterComboBox->addItem( tr( "HTML Files (*.html *.htm)" ) );
  mFilterComboBox->addItem( tr( "Text Files (*.txt)" ) );
  if ( const QgsProcessingParameterFile *fileParam = dynamic_cast<const QgsProcessingParameterFile *>( definition ) )
    mFilterComboBox->setCurrentText( fileParam->fileFilter() );
  else
    mFilterComboBox->setCurrentIndex( 0 );
  vlayout->addWidget( mFilterComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultFileWidget = new QgsFileWidget();
  mDefaultFileWidget->lineEdit()->setShowClearButton( true );
  if ( const QgsProcessingParameterFile *fileParam = dynamic_cast<const QgsProcessingParameterFile *>( definition ) )
  {
    mDefaultFileWidget->setStorageMode( fileParam->behavior() == Qgis::ProcessingFileParameterBehavior::File ? QgsFileWidget::GetFile : QgsFileWidget::GetDirectory );
    mDefaultFileWidget->setFilePath( fileParam->defaultValueForGui().toString() );
  }
  else
    mDefaultFileWidget->setStorageMode( QgsFileWidget::GetFile );
  vlayout->addWidget( mDefaultFileWidget );
 
  connect( mTypeComboBox, qOverload<int>( &QComboBox::currentIndexChanged ), this, [=] {
    Qgis::ProcessingFileParameterBehavior behavior = static_cast<Qgis::ProcessingFileParameterBehavior>( mTypeComboBox->currentData().toInt() );
    mFilterComboBox->setEnabled( behavior == Qgis::ProcessingFileParameterBehavior::File );
    mDefaultFileWidget->setStorageMode( behavior == Qgis::ProcessingFileParameterBehavior::File ? QgsFileWidget::GetFile : QgsFileWidget::GetDirectory );
  } );
  mFilterComboBox->setEnabled( static_cast<Qgis::ProcessingFileParameterBehavior>( mTypeComboBox->currentData().toInt() ) == Qgis::ProcessingFileParameterBehavior::File );
 
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingFileParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterFile>( name, description );
  param->setBehavior( static_cast<Qgis::ProcessingFileParameterBehavior>( mTypeComboBox->currentData().toInt() ) );
  if ( param->behavior() == Qgis::ProcessingFileParameterBehavior::File )
    param->setFileFilter( mFilterComboBox->currentText() );
  if ( !mDefaultFileWidget->filePath().isEmpty() )
    param->setDefaultValue( mDefaultFileWidget->filePath() );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingFileWidgetWrapper::QgsProcessingFileWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingFileWidgetWrapper::createWidget()
{
  const QgsProcessingParameterFile *fileParam = dynamic_cast<const QgsProcessingParameterFile *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Modeler:
    case QgsProcessingGui::Batch:
    {
      mFileWidget = new QgsFileWidget();
      mFileWidget->setToolTip( parameterDefinition()->toolTip() );
      mFileWidget->setDialogTitle( parameterDefinition()->description() );
 
      mFileWidget->setDefaultRoot( QgsSettings().value( QStringLiteral( "/Processing/LastInputPath" ), QDir::homePath() ).toString() );
 
      switch ( fileParam->behavior() )
      {
        case Qgis::ProcessingFileParameterBehavior::File:
          mFileWidget->setStorageMode( QgsFileWidget::GetFile );
          if ( !fileParam->fileFilter().isEmpty() )
            mFileWidget->setFilter( fileParam->fileFilter() );
          else if ( !fileParam->extension().isEmpty() )
            mFileWidget->setFilter( tr( "%1 files" ).arg( fileParam->extension().toUpper() ) + QStringLiteral( " (*." ) + fileParam->extension().toLower() + ')' );
          break;
 
        case Qgis::ProcessingFileParameterBehavior::Folder:
          mFileWidget->setStorageMode( QgsFileWidget::GetDirectory );
          break;
      }
 
      connect( mFileWidget, &QgsFileWidget::fileChanged, this, [=]( const QString &path ) {
        QgsSettings().setValue( QStringLiteral( "/Processing/LastInputPath" ), QFileInfo( path ).canonicalPath() );
        emit widgetValueHasChanged( this );
      } );
      return mFileWidget;
    }
  }
  return nullptr;
}
 
void QgsProcessingFileWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
  if ( mFileWidget )
    mFileWidget->setFilePath( v );
}
 
QVariant QgsProcessingFileWidgetWrapper::widgetValue() const
{
  if ( mFileWidget )
    return mFileWidget->filePath();
  else
    return QVariant();
}
 
QStringList QgsProcessingFileWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterFile::typeName();
}
 
QStringList QgsProcessingFileWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList() << QgsProcessingOutputFile::typeName()
                       << QgsProcessingOutputFolder::typeName()
                       << QgsProcessingOutputString::typeName()
                       << QgsProcessingOutputVariant::typeName()
                       << QgsProcessingOutputRasterLayer::typeName()
                       << QgsProcessingOutputVectorLayer::typeName()
                       << QgsProcessingOutputMapLayer::typeName();
}
 
QString QgsProcessingFileWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string representing a path to a file or folder" );
}
 
QString QgsProcessingFileWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterFile::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingFileWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingFileWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingFileWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingFileParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingExpressionWidgetWrapper
//
 
QgsProcessingExpressionParameterDefinitionWidget::QgsProcessingExpressionParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultQgisLineEdit = new QgsExpressionLineEdit();
  mDefaultQgisLineEdit->registerExpressionContextGenerator( this );
 
  mDefaultPointCloudLineEdit = new QgsProcessingPointCloudExpressionLineEdit();
  mDefaultRasterCalculatorLineEdit = new QgsProcessingRasterCalculatorExpressionLineEdit();
 
  QStackedWidget *stackedWidget = new QStackedWidget();
  stackedWidget->addWidget( mDefaultQgisLineEdit );
  stackedWidget->addWidget( mDefaultPointCloudLineEdit );
  stackedWidget->addWidget( mDefaultRasterCalculatorLineEdit );
  vlayout->addWidget( stackedWidget );
 
  if ( const QgsProcessingParameterExpression *expParam = dynamic_cast<const QgsProcessingParameterExpression *>( definition ) )
  {
    const QString expr = QgsProcessingParameters::parameterAsExpression( expParam, expParam->defaultValueForGui(), context );
    mDefaultQgisLineEdit->setExpression( expr );
    mDefaultPointCloudLineEdit->setExpression( expr );
  }
 
  vlayout->addWidget( new QLabel( tr( "Parent layer" ) ) );
 
  mParentLayerComboBox = new QComboBox();
  vlayout->addWidget( mParentLayerComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Expression type" ) ) );
  mExpressionTypeComboBox = new QComboBox();
  mExpressionTypeComboBox->addItem( tr( "QGIS" ), static_cast<int>( Qgis::ExpressionType::Qgis ) );
  mExpressionTypeComboBox->addItem( tr( "Point Cloud" ), static_cast<int>( Qgis::ExpressionType::PointCloud ) );
  mExpressionTypeComboBox->addItem( tr( "Raster Calculator" ), static_cast<int>( Qgis::ExpressionType::RasterCalculator ) );
 
  connect( mExpressionTypeComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, [=]( int ) {
    mParentLayerComboBox->clear();
    mParentLayerComboBox->addItem( tr( "None" ), QVariant() );
 
    stackedWidget->setCurrentIndex( mExpressionTypeComboBox->currentIndex() > 0 ? mExpressionTypeComboBox->currentIndex() : 0 );
 
    QString initialParent;
    if ( const QgsProcessingParameterExpression *expParam = dynamic_cast<const QgsProcessingParameterExpression *>( definition ) )
      initialParent = expParam->parentLayerParameterName();
 
    Qgis::ExpressionType exprType = static_cast<Qgis::ExpressionType>( mExpressionTypeComboBox->currentData().toInt() );
 
    if ( QgsProcessingModelAlgorithm *model = widgetContext.model() )
    {
      // populate combo box with other model input choices
      const QMap<QString, QgsProcessingModelParameter> components = model->parameterComponents();
      for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
      {
        switch ( exprType )
        {
          case Qgis::ExpressionType::Qgis:
            if ( const QgsProcessingParameterFeatureSource *definition = dynamic_cast<const QgsProcessingParameterFeatureSource *>( model->parameterDefinition( it.value().parameterName() ) ) )
            {
              mParentLayerComboBox->addItem( definition->description(), definition->name() );
              if ( !initialParent.isEmpty() && initialParent == definition->name() )
              {
                mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
              }
            }
            else if ( const QgsProcessingParameterVectorLayer *definition = dynamic_cast<const QgsProcessingParameterVectorLayer *>( model->parameterDefinition( it.value().parameterName() ) ) )
            {
              mParentLayerComboBox->addItem( definition->description(), definition->name() );
              if ( !initialParent.isEmpty() && initialParent == definition->name() )
              {
                mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
              }
            }
            break;
          case Qgis::ExpressionType::PointCloud:
            if ( const QgsProcessingParameterPointCloudLayer *definition = dynamic_cast<const QgsProcessingParameterPointCloudLayer *>( model->parameterDefinition( it.value().parameterName() ) ) )
            {
              mParentLayerComboBox->addItem( definition->description(), definition->name() );
              if ( !initialParent.isEmpty() && initialParent == definition->name() )
              {
                mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
              }
            }
            break;
          case Qgis::ExpressionType::RasterCalculator:
            if ( const QgsProcessingParameterMultipleLayers *definition = dynamic_cast<const QgsProcessingParameterMultipleLayers *>( model->parameterDefinition( it.value().parameterName() ) ) )
            {
              if ( definition->layerType() != Qgis::ProcessingSourceType::Raster )
              {
                continue;
              }
              mParentLayerComboBox->addItem( definition->description(), definition->name() );
              if ( !initialParent.isEmpty() && initialParent == definition->name() )
              {
                mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
              }
            }
            break;
        }
      }
    }
 
    if ( mParentLayerComboBox->count() == 1 && !initialParent.isEmpty() )
    {
      // if no parent candidates found, we just add the existing one as a placeholder
      mParentLayerComboBox->addItem( initialParent, initialParent );
      mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
    }
  } );
 
  mExpressionTypeComboBox->setCurrentIndex( -1 );
  if ( const QgsProcessingParameterExpression *expParam = dynamic_cast<const QgsProcessingParameterExpression *>( definition ) )
    mExpressionTypeComboBox->setCurrentIndex( mExpressionTypeComboBox->findData( static_cast<int>( expParam->expressionType() ) ) );
  else
    mExpressionTypeComboBox->setCurrentIndex( 0 );
 
  vlayout->addWidget( mExpressionTypeComboBox );
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingExpressionParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  Qgis::ExpressionType expressionType = static_cast<Qgis::ExpressionType>( mExpressionTypeComboBox->currentData().toInt() );
  QString expression;
  switch ( expressionType )
  {
    case Qgis::ExpressionType::Qgis:
      expression = mDefaultQgisLineEdit->expression();
      break;
    case Qgis::ExpressionType::PointCloud:
      expression = mDefaultPointCloudLineEdit->expression();
      break;
    case Qgis::ExpressionType::RasterCalculator:
      expression = mDefaultRasterCalculatorLineEdit->expression();
      break;
  }
  auto param = std::make_unique<QgsProcessingParameterExpression>( name, description, expression, mParentLayerComboBox->currentData().toString(), false, expressionType );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingExpressionWidgetWrapper::QgsProcessingExpressionWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingExpressionWidgetWrapper::createWidget()
{
  const QgsProcessingParameterExpression *expParam = dynamic_cast<const QgsProcessingParameterExpression *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Modeler:
    case QgsProcessingGui::Batch:
    {
      if ( expParam->parentLayerParameterName().isEmpty() )
      {
        mExpLineEdit = new QgsExpressionLineEdit();
        mExpLineEdit->setToolTip( parameterDefinition()->toolTip() );
        mExpLineEdit->setExpressionDialogTitle( parameterDefinition()->description() );
        mExpLineEdit->registerExpressionContextGenerator( this );
        connect( mExpLineEdit, &QgsExpressionLineEdit::expressionChanged, this, [=]( const QString & ) {
          emit widgetValueHasChanged( this );
        } );
        return mExpLineEdit;
      }
      else
      {
        if ( expParam->expressionType() == Qgis::ExpressionType::PointCloud )
        {
          mPointCloudExpLineEdit = new QgsProcessingPointCloudExpressionLineEdit();
          mPointCloudExpLineEdit->setToolTip( parameterDefinition()->toolTip() );
          connect( mPointCloudExpLineEdit, &QgsProcessingPointCloudExpressionLineEdit::expressionChanged, this, [=]( const QString & ) {
            emit widgetValueHasChanged( this );
          } );
          return mPointCloudExpLineEdit;
        }
 
        if ( expParam->expressionType() == Qgis::ExpressionType::RasterCalculator )
        {
          mRasterCalculatorExpLineEdit = new QgsProcessingRasterCalculatorExpressionLineEdit();
          mRasterCalculatorExpLineEdit->setToolTip( parameterDefinition()->toolTip() );
          if ( type() == QgsProcessingGui::Modeler )
          {
            mRasterCalculatorExpLineEdit->setLayers( QVariantList() << "A" << "B" << "C" << "D" << "E" << "F" << "G" );
          }
          connect( mRasterCalculatorExpLineEdit, &QgsProcessingRasterCalculatorExpressionLineEdit::expressionChanged, this, [=]( const QString & ) {
            emit widgetValueHasChanged( this );
          } );
          return mRasterCalculatorExpLineEdit;
        }
 
        // native QGIS expression
        if ( expParam->metadata().value( QStringLiteral( "inlineEditor" ) ).toBool() )
        {
          mExpBuilderWidget = new QgsExpressionBuilderWidget();
          mExpBuilderWidget->setToolTip( parameterDefinition()->toolTip() );
          mExpBuilderWidget->init( createExpressionContext() );
          connect( mExpBuilderWidget, &QgsExpressionBuilderWidget::expressionParsed, this, [=]( bool changed ) {
            Q_UNUSED( changed );
            emit widgetValueHasChanged( this );
          } );
          return mExpBuilderWidget;
        }
        else
        {
          mFieldExpWidget = new QgsFieldExpressionWidget();
          mFieldExpWidget->setToolTip( parameterDefinition()->toolTip() );
          mFieldExpWidget->setExpressionDialogTitle( parameterDefinition()->description() );
          mFieldExpWidget->registerExpressionContextGenerator( this );
          if ( expParam->flags() & Qgis::ProcessingParameterFlag::Optional )
            mFieldExpWidget->setAllowEmptyFieldName( true );
 
          connect( mFieldExpWidget, static_cast<void ( QgsFieldExpressionWidget::* )( const QString & )>( &QgsFieldExpressionWidget::fieldChanged ), this, [=]( const QString & ) {
            emit widgetValueHasChanged( this );
          } );
          return mFieldExpWidget;
        }
      }
    }
  }
  return nullptr;
}
 
void QgsProcessingExpressionWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
{
  QgsAbstractProcessingParameterWidgetWrapper::postInitialize( wrappers );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      for ( const QgsAbstractProcessingParameterWidgetWrapper *wrapper : wrappers )
      {
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterExpression *>( parameterDefinition() )->parentLayerParameterName() )
        {
          setParentLayerWrapperValue( wrapper );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setParentLayerWrapperValue( wrapper );
          } );
          break;
        }
      }
      break;
    }
 
    case QgsProcessingGui::Modeler:
      break;
  }
}
 
void QgsProcessingExpressionWidgetWrapper::registerProcessingContextGenerator( QgsProcessingContextGenerator *generator )
{
  QgsAbstractProcessingParameterWidgetWrapper::registerProcessingContextGenerator( generator );
  if ( mExpBuilderWidget )
  {
    // we need to regenerate the expression context for use by this widget -- it doesn't fetch automatically on demand
    mExpBuilderWidget->setExpressionContext( createExpressionContext() );
  }
}
 
void QgsProcessingExpressionWidgetWrapper::setParentLayerWrapperValue( const QgsAbstractProcessingParameterWidgetWrapper *parentWrapper )
{
  // evaluate value to layer
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  QVariant val = parentWrapper->parameterValue();
 
  const QgsProcessingParameterExpression *expParam = dynamic_cast<const QgsProcessingParameterExpression *>( parameterDefinition() );
  switch ( expParam->expressionType() )
  {
    case Qgis::ExpressionType::Qgis:
    {
      if ( val.userType() == qMetaTypeId<QgsProcessingFeatureSourceDefinition>() )
      {
        // input is a QgsProcessingFeatureSourceDefinition - get extra properties from it
        QgsProcessingFeatureSourceDefinition fromVar = qvariant_cast<QgsProcessingFeatureSourceDefinition>( val );
        val = fromVar.source;
      }
 
      QgsVectorLayer *layer = QgsProcessingParameters::parameterAsVectorLayer( parentWrapper->parameterDefinition(), val, *context );
      if ( !layer )
      {
        if ( mFieldExpWidget )
          mFieldExpWidget->setLayer( nullptr );
        else if ( mExpBuilderWidget )
          mExpBuilderWidget->setLayer( nullptr );
        else if ( mExpLineEdit )
          mExpLineEdit->setLayer( nullptr );
        return;
      }
 
      // need to grab ownership of layer if required - otherwise layer may be deleted when context
      // goes out of scope
      std::unique_ptr<QgsMapLayer> ownedLayer( context->takeResultLayer( layer->id() ) );
      if ( ownedLayer && ownedLayer->type() == Qgis::LayerType::Vector )
      {
        mParentLayer.reset( ownedLayer.release() );
        layer = static_cast<QgsVectorLayer *>( mParentLayer.get() );
      }
      else
      {
        // don't need ownership of this layer - it wasn't owned by context (so e.g. is owned by the project)
      }
 
      if ( mFieldExpWidget )
        mFieldExpWidget->setLayer( layer );
      if ( mExpBuilderWidget )
        mExpBuilderWidget->setLayer( layer );
      else if ( mExpLineEdit )
        mExpLineEdit->setLayer( layer );
 
      break;
    }
    case Qgis::ExpressionType::PointCloud:
    {
      QgsPointCloudLayer *layer = QgsProcessingParameters::parameterAsPointCloudLayer( parentWrapper->parameterDefinition(), val, *context, QgsProcessing::LayerOptionsFlag::SkipIndexGeneration );
      if ( !layer )
      {
        if ( mPointCloudExpLineEdit )
          mPointCloudExpLineEdit->setLayer( nullptr );
        return;
      }
 
      // need to grab ownership of layer if required - otherwise layer may be deleted when context
      // goes out of scope
      std::unique_ptr<QgsMapLayer> ownedLayer( context->takeResultLayer( layer->id() ) );
      if ( ownedLayer && ownedLayer->type() == Qgis::LayerType::PointCloud )
      {
        mParentLayer.reset( ownedLayer.release() );
        layer = static_cast<QgsPointCloudLayer *>( mParentLayer.get() );
      }
      else
      {
        // don't need ownership of this layer - it wasn't owned by context (so e.g. is owned by the project)
      }
 
      if ( mPointCloudExpLineEdit )
        mPointCloudExpLineEdit->setLayer( layer );
 
      break;
    }
    case Qgis::ExpressionType::RasterCalculator:
    {
      QList<QgsMapLayer *> layers = QgsProcessingParameters::parameterAsLayerList( parentWrapper->parameterDefinition(), val, *context, QgsProcessing::LayerOptionsFlag::SkipIndexGeneration );
      if ( layers.isEmpty() )
      {
        if ( mRasterCalculatorExpLineEdit )
        {
          mRasterCalculatorExpLineEdit->setLayers( val.userType() == QMetaType::Type::QVariantList ? val.toList() : QVariantList() << val );
        }
        return;
      }
 
      if ( mRasterCalculatorExpLineEdit )
      {
        QVariantList layersList;
        for ( QgsMapLayer *layer : layers )
        {
          layersList << layer->name();
        }
        mRasterCalculatorExpLineEdit->setLayers( layersList );
      }
 
      break;
    }
  }
}
 
void QgsProcessingExpressionWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
  if ( mFieldExpWidget )
    mFieldExpWidget->setExpression( v );
  else if ( mExpBuilderWidget )
    mExpBuilderWidget->setExpressionText( v );
  else if ( mExpLineEdit )
    mExpLineEdit->setExpression( v );
  else if ( mPointCloudExpLineEdit )
    mPointCloudExpLineEdit->setExpression( v );
  else if ( mRasterCalculatorExpLineEdit )
    mRasterCalculatorExpLineEdit->setExpression( v );
}
 
QVariant QgsProcessingExpressionWidgetWrapper::widgetValue() const
{
  if ( mFieldExpWidget )
    return mFieldExpWidget->expression();
  if ( mExpBuilderWidget )
    return mExpBuilderWidget->expressionText();
  else if ( mExpLineEdit )
    return mExpLineEdit->expression();
  else if ( mPointCloudExpLineEdit )
    return mPointCloudExpLineEdit->expression();
  else if ( mRasterCalculatorExpLineEdit )
    return mRasterCalculatorExpLineEdit->expression();
  else
    return QVariant();
}
 
QStringList QgsProcessingExpressionWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterExpression::typeName()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterNumber::typeName()
         << QgsProcessingParameterDistance::typeName()
         << QgsProcessingParameterArea::typeName()
         << QgsProcessingParameterVolume::typeName()
         << QgsProcessingParameterScale::typeName()
         << QgsProcessingParameterProviderConnection::typeName();
}
 
QStringList QgsProcessingExpressionWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputNumber::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingExpressionWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string representation of an expression" );
}
 
const QgsVectorLayer *QgsProcessingExpressionWidgetWrapper::linkedVectorLayer() const
{
  if ( mFieldExpWidget && mFieldExpWidget->layer() )
    return mFieldExpWidget->layer();
 
  if ( mExpBuilderWidget && mExpBuilderWidget->layer() )
    return mExpBuilderWidget->layer();
 
  return QgsAbstractProcessingParameterWidgetWrapper::linkedVectorLayer();
}
 
QString QgsProcessingExpressionWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterExpression::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingExpressionWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingExpressionWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingExpressionWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingExpressionParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingEnumPanelWidget
//
 
QgsProcessingEnumPanelWidget::QgsProcessingEnumPanelWidget( QWidget *parent, const QgsProcessingParameterEnum *param )
  : QWidget( parent )
  , mParam( param )
{
  QHBoxLayout *hl = new QHBoxLayout();
  hl->setContentsMargins( 0, 0, 0, 0 );
 
  mLineEdit = new QLineEdit();
  mLineEdit->setEnabled( false );
  hl->addWidget( mLineEdit, 1 );
 
  mToolButton = new QToolButton();
  mToolButton->setText( QString( QChar( 0x2026 ) ) );
  hl->addWidget( mToolButton );
 
  setLayout( hl );
 
  if ( mParam )
  {
    mLineEdit->setText( tr( "%1 options selected" ).arg( 0 ) );
  }
 
  connect( mToolButton, &QToolButton::clicked, this, &QgsProcessingEnumPanelWidget::showDialog );
}
 
void QgsProcessingEnumPanelWidget::setValue( const QVariant &value )
{
  if ( value.isValid() )
  {
    mValue = value.userType() == QMetaType::Type::QVariantList ? value.toList() : QVariantList() << value;
 
    if ( mParam->usesStaticStrings() && mValue.count() == 1 && mValue.at( 0 ).toString().isEmpty() )
      mValue.clear();
  }
  else
    mValue.clear();
 
  updateSummaryText();
  emit changed();
}
 
void QgsProcessingEnumPanelWidget::showDialog()
{
  QVariantList availableOptions;
  if ( mParam )
  {
    availableOptions.reserve( mParam->options().size() );
 
    if ( mParam->usesStaticStrings() )
    {
      for ( QString o : mParam->options() )
      {
        availableOptions << o;
      }
    }
    else
    {
      for ( int i = 0; i < mParam->options().count(); ++i )
        availableOptions << i;
    }
  }
 
  const QStringList options = mParam ? mParam->options() : QStringList();
  QgsPanelWidget *panel = QgsPanelWidget::findParentPanel( this );
  if ( panel && panel->dockMode() )
  {
    QgsProcessingMultipleSelectionPanelWidget *widget = new QgsProcessingMultipleSelectionPanelWidget( availableOptions, mValue );
    widget->setPanelTitle( mParam->description() );
 
    if ( mParam->usesStaticStrings() )
    {
      widget->setValueFormatter( [options]( const QVariant &v ) -> QString {
        const QString i = v.toString();
        return options.contains( i ) ? i : QString();
      } );
    }
    else
    {
      widget->setValueFormatter( [options]( const QVariant &v ) -> QString {
        const int i = v.toInt();
        return options.size() > i ? options.at( i ) : QString();
      } );
    }
 
    connect( widget, &QgsProcessingMultipleSelectionPanelWidget::selectionChanged, this, [=]() {
      setValue( widget->selectedOptions() );
    } );
    connect( widget, &QgsProcessingMultipleSelectionPanelWidget::acceptClicked, widget, &QgsPanelWidget::acceptPanel );
    panel->openPanel( widget );
  }
  else
  {
    QgsProcessingMultipleSelectionDialog dlg( availableOptions, mValue, this, Qt::WindowFlags() );
 
    dlg.setValueFormatter( [options]( const QVariant &v ) -> QString {
      const int i = v.toInt();
      return options.size() > i ? options.at( i ) : QString();
    } );
    if ( dlg.exec() )
    {
      setValue( dlg.selectedOptions() );
    }
  }
}
 
void QgsProcessingEnumPanelWidget::updateSummaryText()
{
  if ( !mParam )
    return;
 
  if ( mValue.empty() )
  {
    mLineEdit->setText( tr( "%1 options selected" ).arg( 0 ) );
  }
  else
  {
    QStringList values;
    values.reserve( mValue.size() );
    if ( mParam->usesStaticStrings() )
    {
      for ( const QVariant &val : std::as_const( mValue ) )
      {
        values << val.toString();
      }
    }
    else
    {
      const QStringList options = mParam->options();
      for ( const QVariant &val : std::as_const( mValue ) )
      {
        const int i = val.toInt();
        values << ( options.size() > i ? options.at( i ) : QString() );
      }
    }
 
    const QString concatenated = values.join( tr( "," ) );
    if ( concatenated.length() < 100 )
      mLineEdit->setText( concatenated );
    else
      mLineEdit->setText( tr( "%n option(s) selected", nullptr, mValue.count() ) );
  }
}
 
 
//
// QgsProcessingEnumCheckboxPanelWidget
//
QgsProcessingEnumCheckboxPanelWidget::QgsProcessingEnumCheckboxPanelWidget( QWidget *parent, const QgsProcessingParameterEnum *param, int columns )
  : QWidget( parent )
  , mParam( param )
  , mButtonGroup( new QButtonGroup( this ) )
  , mColumns( columns )
{
  mButtonGroup->setExclusive( !mParam->allowMultiple() );
 
  QGridLayout *l = new QGridLayout();
  l->setContentsMargins( 0, 0, 0, 0 );
 
  int rows = static_cast<int>( std::ceil( mParam->options().count() / static_cast<double>( mColumns ) ) );
  for ( int i = 0; i < mParam->options().count(); ++i )
  {
    QAbstractButton *button = nullptr;
    if ( mParam->allowMultiple() )
      button = new QCheckBox( mParam->options().at( i ) );
    else
      button = new QRadioButton( mParam->options().at( i ) );
 
    connect( button, &QAbstractButton::toggled, this, [=] {
      if ( !mBlockChangedSignal )
        emit changed();
    } );
 
    mButtons.insert( i, button );
 
    mButtonGroup->addButton( button, i );
    l->addWidget( button, i % rows, i / rows );
  }
  l->addItem( new QSpacerItem( 0, 0, QSizePolicy::Expanding, QSizePolicy::Minimum ), 0, mColumns );
  setLayout( l );
 
  if ( mParam->allowMultiple() )
  {
    setContextMenuPolicy( Qt::CustomContextMenu );
    connect( this, &QWidget::customContextMenuRequested, this, &QgsProcessingEnumCheckboxPanelWidget::showPopupMenu );
  }
}
 
QVariant QgsProcessingEnumCheckboxPanelWidget::value() const
{
  if ( mParam->allowMultiple() )
  {
    QVariantList value;
    for ( auto it = mButtons.constBegin(); it != mButtons.constEnd(); ++it )
    {
      if ( it.value()->isChecked() )
        value.append( mParam->usesStaticStrings() ? mParam->options().at( it.key().toInt() ) : it.key() );
    }
    return value;
  }
  else
  {
    if ( mParam->usesStaticStrings() )
      return mButtonGroup->checkedId() >= 0 ? mParam->options().at( mButtonGroup->checkedId() ) : QVariant();
    else
      return mButtonGroup->checkedId() >= 0 ? mButtonGroup->checkedId() : QVariant();
  }
}
 
void QgsProcessingEnumCheckboxPanelWidget::setValue( const QVariant &value )
{
  mBlockChangedSignal = true;
  if ( mParam->allowMultiple() )
  {
    QVariantList selected;
    if ( value.isValid() )
      selected = value.userType() == QMetaType::Type::QVariantList ? value.toList() : QVariantList() << value;
    for ( auto it = mButtons.constBegin(); it != mButtons.constEnd(); ++it )
    {
      QVariant v = mParam->usesStaticStrings() ? mParam->options().at( it.key().toInt() ) : it.key();
      it.value()->setChecked( selected.contains( v ) );
    }
  }
  else
  {
    QVariant v = value;
    if ( v.userType() == QMetaType::Type::QVariantList )
      v = v.toList().value( 0 );
 
    v = mParam->usesStaticStrings() ? mParam->options().indexOf( v.toString() ) : v;
    if ( mButtons.contains( v ) )
      mButtons.value( v )->setChecked( true );
  }
  mBlockChangedSignal = false;
  emit changed();
}
 
void QgsProcessingEnumCheckboxPanelWidget::showPopupMenu()
{
  QMenu popupMenu;
  QAction *selectAllAction = new QAction( tr( "Select All" ), &popupMenu );
  connect( selectAllAction, &QAction::triggered, this, &QgsProcessingEnumCheckboxPanelWidget::selectAll );
  QAction *clearAllAction = new QAction( tr( "Clear Selection" ), &popupMenu );
  connect( clearAllAction, &QAction::triggered, this, &QgsProcessingEnumCheckboxPanelWidget::deselectAll );
  popupMenu.addAction( selectAllAction );
  popupMenu.addAction( clearAllAction );
  popupMenu.exec( QCursor::pos() );
}
 
void QgsProcessingEnumCheckboxPanelWidget::selectAll()
{
  mBlockChangedSignal = true;
  for ( auto it = mButtons.constBegin(); it != mButtons.constEnd(); ++it )
    it.value()->setChecked( true );
  mBlockChangedSignal = false;
  emit changed();
}
 
void QgsProcessingEnumCheckboxPanelWidget::deselectAll()
{
  mBlockChangedSignal = true;
  for ( auto it = mButtons.constBegin(); it != mButtons.constEnd(); ++it )
    it.value()->setChecked( false );
  mBlockChangedSignal = false;
  emit changed();
}
 
 
//
// QgsProcessingEnumWidgetWrapper
//
 
QgsProcessingEnumParameterDefinitionWidget::QgsProcessingEnumParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  mEnumWidget = new QgsProcessingEnumModelerWidget();
  if ( const QgsProcessingParameterEnum *enumParam = dynamic_cast<const QgsProcessingParameterEnum *>( definition ) )
  {
    mEnumWidget->setAllowMultiple( enumParam->allowMultiple() );
    mEnumWidget->setOptions( enumParam->options() );
    mEnumWidget->setDefaultOptions( enumParam->defaultValueForGui() );
  }
  vlayout->addWidget( mEnumWidget );
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingEnumParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterEnum>( name, description, mEnumWidget->options(), mEnumWidget->allowMultiple(), mEnumWidget->defaultOptions() );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingEnumWidgetWrapper::QgsProcessingEnumWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingEnumWidgetWrapper::createWidget()
{
  const QgsProcessingParameterEnum *expParam = dynamic_cast<const QgsProcessingParameterEnum *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      // checkbox panel only for use outside in standard gui!
      if ( expParam->metadata().value( QStringLiteral( "widget_wrapper" ) ).toMap().value( QStringLiteral( "useCheckBoxes" ), false ).toBool() )
      {
        const int columns = expParam->metadata().value( QStringLiteral( "widget_wrapper" ) ).toMap().value( QStringLiteral( "columns" ), 2 ).toInt();
        mCheckboxPanel = new QgsProcessingEnumCheckboxPanelWidget( nullptr, expParam, columns );
        mCheckboxPanel->setToolTip( parameterDefinition()->toolTip() );
        connect( mCheckboxPanel, &QgsProcessingEnumCheckboxPanelWidget::changed, this, [=] {
          emit widgetValueHasChanged( this );
        } );
        return mCheckboxPanel;
      }
    }
      [[fallthrough]];
    case QgsProcessingGui::Modeler:
    case QgsProcessingGui::Batch:
    {
      if ( expParam->allowMultiple() )
      {
        mPanel = new QgsProcessingEnumPanelWidget( nullptr, expParam );
        mPanel->setToolTip( parameterDefinition()->toolTip() );
        connect( mPanel, &QgsProcessingEnumPanelWidget::changed, this, [=] {
          emit widgetValueHasChanged( this );
        } );
        return mPanel;
      }
      else
      {
        mComboBox = new QComboBox();
 
        if ( expParam->flags() & Qgis::ProcessingParameterFlag::Optional )
          mComboBox->addItem( tr( "[Not selected]" ), QVariant() );
        const QStringList options = expParam->options();
        const QVariantList iconList = expParam->metadata().value( QStringLiteral( "widget_wrapper" ) ).toMap().value( QStringLiteral( "icons" ) ).toList();
        for ( int i = 0; i < options.count(); ++i )
        {
          const QIcon icon = iconList.value( i ).value<QIcon>();
 
          if ( expParam->usesStaticStrings() )
            mComboBox->addItem( icon, options.at( i ), options.at( i ) );
          else
            mComboBox->addItem( icon, options.at( i ), i );
        }
 
        mComboBox->setToolTip( parameterDefinition()->toolTip() );
        mComboBox->setSizeAdjustPolicy( QComboBox::AdjustToMinimumContentsLengthWithIcon );
        connect( mComboBox, qOverload<int>( &QComboBox::currentIndexChanged ), this, [=]( int ) {
          emit widgetValueHasChanged( this );
        } );
        return mComboBox;
      }
    }
  }
  return nullptr;
}
 
void QgsProcessingEnumWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mComboBox )
  {
    if ( !value.isValid() )
      mComboBox->setCurrentIndex( mComboBox->findData( QVariant() ) );
    else
    {
      const QgsProcessingParameterEnum *enumDef = dynamic_cast<const QgsProcessingParameterEnum *>( parameterDefinition() );
      if ( enumDef->usesStaticStrings() )
      {
        const QString v = QgsProcessingParameters::parameterAsEnumString( parameterDefinition(), value, context );
        mComboBox->setCurrentIndex( mComboBox->findData( v ) );
      }
      else
      {
        const int v = QgsProcessingParameters::parameterAsEnum( parameterDefinition(), value, context );
        mComboBox->setCurrentIndex( mComboBox->findData( v ) );
      }
    }
  }
  else if ( mPanel || mCheckboxPanel )
  {
    QVariantList opts;
    if ( value.isValid() )
    {
      const QgsProcessingParameterEnum *enumDef = dynamic_cast<const QgsProcessingParameterEnum *>( parameterDefinition() );
      if ( enumDef->usesStaticStrings() )
      {
        const QStringList v = QgsProcessingParameters::parameterAsEnumStrings( parameterDefinition(), value, context );
        opts.reserve( v.size() );
        for ( QString i : v )
          opts << i;
      }
      else
      {
        const QList<int> v = QgsProcessingParameters::parameterAsEnums( parameterDefinition(), value, context );
        opts.reserve( v.size() );
        for ( int i : v )
          opts << i;
      }
    }
    if ( mPanel )
      mPanel->setValue( opts );
    else if ( mCheckboxPanel )
      mCheckboxPanel->setValue( opts );
  }
}
 
QVariant QgsProcessingEnumWidgetWrapper::widgetValue() const
{
  if ( mComboBox )
    return mComboBox->currentData();
  else if ( mPanel )
    return mPanel->value();
  else if ( mCheckboxPanel )
    return mCheckboxPanel->value();
  else
    return QVariant();
}
 
QStringList QgsProcessingEnumWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterEnum::typeName()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterNumber::typeName();
}
 
QStringList QgsProcessingEnumWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName()
         << QgsProcessingOutputNumber::typeName();
}
 
QString QgsProcessingEnumWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "selected option index (starting from 0), array of indices, or comma separated string of options (e.g. '1,3')" );
}
 
QString QgsProcessingEnumWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterEnum::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingEnumWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingEnumWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingEnumWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingEnumParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
//
// QgsProcessingLayoutWidgetWrapper
//
 
QgsProcessingLayoutWidgetWrapper::QgsProcessingLayoutWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingLayoutWidgetWrapper::createWidget()
{
  const QgsProcessingParameterLayout *layoutParam = dynamic_cast<const QgsProcessingParameterLayout *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      // combobox only for use outside modeler!
      mComboBox = new QgsLayoutComboBox( nullptr, widgetContext().project() ? widgetContext().project()->layoutManager() : nullptr );
      if ( layoutParam->flags() & Qgis::ProcessingParameterFlag::Optional )
        mComboBox->setAllowEmptyLayout( true );
      mComboBox->setFilters( QgsLayoutManagerProxyModel::FilterPrintLayouts );
 
      mComboBox->setToolTip( parameterDefinition()->toolTip() );
      connect( mComboBox, &QgsLayoutComboBox::layoutChanged, this, [=]( QgsMasterLayoutInterface * ) {
        emit widgetValueHasChanged( this );
      } );
      return mComboBox;
    }
 
    case QgsProcessingGui::Modeler:
    {
      mPlainComboBox = new QComboBox();
      mPlainComboBox->setEditable( true );
      mPlainComboBox->setToolTip( tr( "Name of an existing print layout" ) );
      if ( widgetContext().project() )
      {
        const QList<QgsPrintLayout *> layouts = widgetContext().project()->layoutManager()->printLayouts();
        for ( const QgsPrintLayout *layout : layouts )
          mPlainComboBox->addItem( layout->name() );
      }
 
      connect( mPlainComboBox, &QComboBox::currentTextChanged, this, [=]( const QString & ) {
        emit widgetValueHasChanged( this );
      } );
      return mPlainComboBox;
    }
  }
  return nullptr;
}
 
void QgsProcessingLayoutWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mComboBox )
  {
    if ( !value.isValid() )
      mComboBox->setCurrentLayout( nullptr );
    else
    {
      if ( QgsPrintLayout *l = QgsProcessingParameters::parameterAsLayout( parameterDefinition(), value, context ) )
        mComboBox->setCurrentLayout( l );
      else
        mComboBox->setCurrentLayout( nullptr );
    }
  }
  else if ( mPlainComboBox )
  {
    const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
    mPlainComboBox->setCurrentText( v );
  }
}
 
QVariant QgsProcessingLayoutWidgetWrapper::widgetValue() const
{
  if ( mComboBox )
  {
    const QgsMasterLayoutInterface *l = mComboBox->currentLayout();
    return l ? l->name() : QVariant();
  }
  else if ( mPlainComboBox )
    return mPlainComboBox->currentText().isEmpty() ? QVariant() : mPlainComboBox->currentText();
  else
    return QVariant();
}
 
void QgsProcessingLayoutWidgetWrapper::setWidgetContext( const QgsProcessingParameterWidgetContext &context )
{
  QgsAbstractProcessingParameterWidgetWrapper::setWidgetContext( context );
  if ( mPlainComboBox && context.project() )
  {
    const QList<QgsPrintLayout *> layouts = widgetContext().project()->layoutManager()->printLayouts();
    for ( const QgsPrintLayout *layout : layouts )
      mPlainComboBox->addItem( layout->name() );
  }
}
 
QStringList QgsProcessingLayoutWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterLayout::typeName()
         << QgsProcessingParameterString::typeName();
}
 
QStringList QgsProcessingLayoutWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingLayoutWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string representing the name of an existing print layout" );
}
 
QString QgsProcessingLayoutWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterLayout::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingLayoutWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingLayoutWidgetWrapper( parameter, type );
}
 
 
//
// QgsProcessingLayoutItemWidgetWrapper
//
 
 
QgsProcessingLayoutItemParameterDefinitionWidget::QgsProcessingLayoutItemParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Parent layout" ) ) );
 
  mParentLayoutComboBox = new QComboBox();
  QString initialParent;
  if ( const QgsProcessingParameterLayoutItem *itemParam = dynamic_cast<const QgsProcessingParameterLayoutItem *>( definition ) )
    initialParent = itemParam->parentLayoutParameterName();
 
  if ( auto *lModel = widgetContext.model() )
  {
    // populate combo box with other model input choices
    const QMap<QString, QgsProcessingModelParameter> components = lModel->parameterComponents();
    for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
    {
      if ( const QgsProcessingParameterLayout *definition = dynamic_cast<const QgsProcessingParameterLayout *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayoutComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayoutComboBox->setCurrentIndex( mParentLayoutComboBox->count() - 1 );
        }
      }
    }
  }
 
  if ( mParentLayoutComboBox->count() == 0 && !initialParent.isEmpty() )
  {
    // if no parent candidates found, we just add the existing one as a placeholder
    mParentLayoutComboBox->addItem( initialParent, initialParent );
    mParentLayoutComboBox->setCurrentIndex( mParentLayoutComboBox->count() - 1 );
  }
 
  vlayout->addWidget( mParentLayoutComboBox );
  setLayout( vlayout );
}
QgsProcessingParameterDefinition *QgsProcessingLayoutItemParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterLayoutItem>( name, description, QVariant(), mParentLayoutComboBox->currentData().toString() );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingLayoutItemWidgetWrapper::QgsProcessingLayoutItemWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingLayoutItemWidgetWrapper::createWidget()
{
  const QgsProcessingParameterLayoutItem *layoutParam = dynamic_cast<const QgsProcessingParameterLayoutItem *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      // combobox only for use outside modeler!
      mComboBox = new QgsLayoutItemComboBox( nullptr, nullptr );
      if ( layoutParam->flags() & Qgis::ProcessingParameterFlag::Optional )
        mComboBox->setAllowEmptyItem( true );
      if ( layoutParam->itemType() >= 0 )
        mComboBox->setItemType( static_cast<QgsLayoutItemRegistry::ItemType>( layoutParam->itemType() ) );
 
      mComboBox->setToolTip( parameterDefinition()->toolTip() );
      connect( mComboBox, &QgsLayoutItemComboBox::itemChanged, this, [=]( QgsLayoutItem * ) {
        emit widgetValueHasChanged( this );
      } );
      return mComboBox;
    }
 
    case QgsProcessingGui::Modeler:
    {
      mLineEdit = new QLineEdit();
      mLineEdit->setToolTip( tr( "UUID or ID of an existing print layout item" ) );
      connect( mLineEdit, &QLineEdit::textChanged, this, [=]( const QString & ) {
        emit widgetValueHasChanged( this );
      } );
      return mLineEdit;
    }
  }
  return nullptr;
}
 
void QgsProcessingLayoutItemWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
{
  QgsAbstractProcessingParameterWidgetWrapper::postInitialize( wrappers );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      for ( const QgsAbstractProcessingParameterWidgetWrapper *wrapper : wrappers )
      {
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterLayoutItem *>( parameterDefinition() )->parentLayoutParameterName() )
        {
          setLayoutParameterValue( wrapper->parameterValue() );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setLayoutParameterValue( wrapper->parameterValue() );
          } );
          break;
        }
      }
      break;
    }
 
    case QgsProcessingGui::Modeler:
      break;
  }
}
 
void QgsProcessingLayoutItemWidgetWrapper::setLayoutParameterValue( const QVariant &value )
{
  QgsPrintLayout *layout = nullptr;
 
  // evaluate value to layout
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  layout = QgsProcessingParameters::parameterAsLayout( parameterDefinition(), value, *context );
  setLayout( layout );
}
 
void QgsProcessingLayoutItemWidgetWrapper::setLayout( QgsPrintLayout *layout )
{
  if ( mComboBox )
    mComboBox->setCurrentLayout( layout );
}
 
void QgsProcessingLayoutItemWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mComboBox )
  {
    if ( !value.isValid() )
      mComboBox->setItem( nullptr );
    else
    {
      QgsLayoutItem *item = QgsProcessingParameters::parameterAsLayoutItem( parameterDefinition(), value, context, qobject_cast<QgsPrintLayout *>( mComboBox->currentLayout() ) );
      mComboBox->setItem( item );
    }
  }
  else if ( mLineEdit )
  {
    const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
    mLineEdit->setText( v );
  }
}
 
QVariant QgsProcessingLayoutItemWidgetWrapper::widgetValue() const
{
  if ( mComboBox )
  {
    const QgsLayoutItem *i = mComboBox->currentItem();
    return i ? i->uuid() : QVariant();
  }
  else if ( mLineEdit )
    return mLineEdit->text().isEmpty() ? QVariant() : mLineEdit->text();
  else
    return QVariant();
}
 
QStringList QgsProcessingLayoutItemWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterLayoutItem::typeName()
         << QgsProcessingParameterString::typeName();
}
 
QStringList QgsProcessingLayoutItemWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingLayoutItemWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string representing the UUID or ID of an existing print layout item" );
}
 
QString QgsProcessingLayoutItemWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterLayoutItem::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingLayoutItemWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingLayoutItemWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingLayoutItemWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingLayoutItemParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
//
// QgsProcessingPointMapTool
//
 
QgsProcessingPointMapTool::QgsProcessingPointMapTool( QgsMapCanvas *canvas )
  : QgsMapTool( canvas )
{
  setCursor( QgsApplication::getThemeCursor( QgsApplication::Cursor::CapturePoint ) );
  mSnapIndicator.reset( new QgsSnapIndicator( canvas ) );
}
 
QgsProcessingPointMapTool::~QgsProcessingPointMapTool() = default;
 
void QgsProcessingPointMapTool::deactivate()
{
  mSnapIndicator->setMatch( QgsPointLocator::Match() );
  QgsMapTool::deactivate();
}
 
void QgsProcessingPointMapTool::canvasMoveEvent( QgsMapMouseEvent *e )
{
  e->snapPoint();
  mSnapIndicator->setMatch( e->mapPointMatch() );
}
 
void QgsProcessingPointMapTool::canvasPressEvent( QgsMapMouseEvent *e )
{
  if ( e->button() == Qt::LeftButton )
  {
    QgsPointXY point = e->snapPoint();
    emit clicked( point );
    emit complete();
  }
}
 
void QgsProcessingPointMapTool::keyPressEvent( QKeyEvent *e )
{
  if ( e->key() == Qt::Key_Escape )
  {
    // Override default shortcut management in MapCanvas
    e->ignore();
    emit complete();
  }
}
 
 
//
// QgsProcessingPointPanel
//
 
QgsProcessingPointPanel::QgsProcessingPointPanel( QWidget *parent )
  : QWidget( parent )
{
  QHBoxLayout *l = new QHBoxLayout();
  l->setContentsMargins( 0, 0, 0, 0 );
  mLineEdit = new QgsFilterLineEdit();
  mLineEdit->setShowClearButton( false );
  l->addWidget( mLineEdit, 1 );
  mButton = new QToolButton();
  mButton->setText( QString( QChar( 0x2026 ) ) );
  l->addWidget( mButton );
  setLayout( l );
 
  connect( mLineEdit, &QLineEdit::textChanged, this, &QgsProcessingPointPanel::changed );
  connect( mLineEdit, &QLineEdit::textChanged, this, &QgsProcessingPointPanel::textChanged );
  connect( mButton, &QToolButton::clicked, this, &QgsProcessingPointPanel::selectOnCanvas );
  mButton->setVisible( false );
}
 
void QgsProcessingPointPanel::setMapCanvas( QgsMapCanvas *canvas )
{
  mCanvas = canvas;
  if ( mAllowSelectOnCanvas )
  {
    mButton->setVisible( true );
 
    mCrs = canvas->mapSettings().destinationCrs();
    mTool = std::make_unique<QgsProcessingPointMapTool>( mCanvas );
    connect( mTool.get(), &QgsProcessingPointMapTool::clicked, this, &QgsProcessingPointPanel::updatePoint );
    connect( mTool.get(), &QgsProcessingPointMapTool::complete, this, &QgsProcessingPointPanel::pointPicked );
  }
}
 
void QgsProcessingPointPanel::setAllowNull( bool allowNull )
{
  mLineEdit->setShowClearButton( allowNull );
}
 
void QgsProcessingPointPanel::setShowPointOnCanvas( bool show )
{
  if ( mShowPointOnCanvas == show )
    return;
 
  mShowPointOnCanvas = show;
  if ( mShowPointOnCanvas )
  {
    updateRubberBand();
  }
  else
  {
    mMapPointRubberBand.reset();
  }
}
 
void QgsProcessingPointPanel::setAllowSelectOnCanvas( bool allow )
{
  mAllowSelectOnCanvas = allow;
  mButton->setVisible( mAllowSelectOnCanvas && static_cast<bool>( mTool ) );
}
 
QVariant QgsProcessingPointPanel::value() const
{
  return mLineEdit->showClearButton() && mLineEdit->text().trimmed().isEmpty() ? QVariant() : QVariant( mLineEdit->text() );
}
 
void QgsProcessingPointPanel::clear()
{
  mLineEdit->clear();
}
 
void QgsProcessingPointPanel::setValue( const QgsPointXY &point, const QgsCoordinateReferenceSystem &crs )
{
  mPoint = point;
  QString newText = QStringLiteral( "%1,%2" )
                      .arg( QString::number( point.x(), 'f' ), QString::number( point.y(), 'f' ) );
 
  mCrs = crs;
  if ( mCrs.isValid() )
  {
    newText += QStringLiteral( " [%1]" ).arg( mCrs.authid() );
  }
  mLineEdit->setText( newText );
  updateRubberBand();
}
 
void QgsProcessingPointPanel::showEvent( QShowEvent * )
{
  if ( mFirstShow )
  {
    // we don't support select on canvas if the dialog is modal
    if ( QWidget *parentWindow = window() )
    {
      setAllowSelectOnCanvas( !parentWindow->isModal() );
    }
    mFirstShow = false;
  }
}
 
void QgsProcessingPointPanel::selectOnCanvas()
{
  if ( !mCanvas )
    return;
 
  mPrevTool = mCanvas->mapTool();
  mCanvas->setMapTool( mTool.get() );
 
  emit toggleDialogVisibility( false );
}
 
void QgsProcessingPointPanel::updatePoint( const QgsPointXY &point )
{
  setValue( point, mCanvas->mapSettings().destinationCrs() );
}
 
void QgsProcessingPointPanel::pointPicked()
{
  if ( !mCanvas )
    return;
 
  mCanvas->setMapTool( mPrevTool );
 
  emit toggleDialogVisibility( true );
}
 
void QgsProcessingPointPanel::textChanged( const QString &text )
{
  const thread_local QRegularExpression rx( QStringLiteral( "^\\s*\\(?\\s*(.*?)\\s*,\\s*(.*?)\\s*(?:\\[(.*)\\])?\\s*\\)?\\s*$" ) );
 
  const QRegularExpressionMatch match = rx.match( text );
  if ( match.hasMatch() )
  {
    bool xOk = false;
    const double x = match.captured( 1 ).toDouble( &xOk );
    bool yOk = false;
    const double y = match.captured( 2 ).toDouble( &yOk );
 
    if ( xOk && yOk )
    {
      mPoint = QgsPointXY( x, y );
 
      const QgsCoordinateReferenceSystem pointCrs( match.captured( 3 ) );
      if ( pointCrs.isValid() )
      {
        mCrs = pointCrs;
      }
    }
    else
    {
      mPoint = QgsPointXY();
    }
  }
  else
  {
    mPoint = QgsPointXY();
  }
 
  updateRubberBand();
}
 
void QgsProcessingPointPanel::updateRubberBand()
{
  if ( !mShowPointOnCanvas || !mCanvas )
    return;
 
  if ( mPoint.isEmpty() )
  {
    mMapPointRubberBand.reset();
    return;
  }
 
  if ( !mMapPointRubberBand )
  {
    mMapPointRubberBand.reset( new QgsRubberBand( mCanvas, Qgis::GeometryType::Point ) );
    mMapPointRubberBand->setZValue( 1000 );
    mMapPointRubberBand->setIcon( QgsRubberBand::ICON_X );
 
    const double scaleFactor = mCanvas->fontMetrics().xHeight() * .4;
    mMapPointRubberBand->setWidth( scaleFactor );
    mMapPointRubberBand->setIconSize( scaleFactor * 5 );
 
    mMapPointRubberBand->setSecondaryStrokeColor( QColor( 255, 255, 255, 100 ) );
    mMapPointRubberBand->setColor( QColor( 200, 0, 200 ) );
  }
 
  mMapPointRubberBand->setToGeometry( QgsGeometry::fromPointXY( mPoint ), mCrs );
}
 
 
//
// QgsProcessingPointWidgetWrapper
//
 
QgsProcessingPointParameterDefinitionWidget::QgsProcessingPointParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultLineEdit = new QLineEdit();
  mDefaultLineEdit->setToolTip( tr( "Point as 'x,y'" ) );
  mDefaultLineEdit->setPlaceholderText( tr( "Point as 'x,y'" ) );
  if ( const QgsProcessingParameterPoint *pointParam = dynamic_cast<const QgsProcessingParameterPoint *>( definition ) )
  {
    QgsPointXY point = QgsProcessingParameters::parameterAsPoint( pointParam, pointParam->defaultValueForGui(), context );
    mDefaultLineEdit->setText( QStringLiteral( "%1,%2" ).arg( QString::number( point.x(), 'f' ), QString::number( point.y(), 'f' ) ) );
  }
 
  vlayout->addWidget( mDefaultLineEdit );
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingPointParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterPoint>( name, description, mDefaultLineEdit->text() );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingPointWidgetWrapper::QgsProcessingPointWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingPointWidgetWrapper::createWidget()
{
  const QgsProcessingParameterPoint *pointParam = dynamic_cast<const QgsProcessingParameterPoint *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      mPanel = new QgsProcessingPointPanel( nullptr );
      if ( widgetContext().mapCanvas() )
        mPanel->setMapCanvas( widgetContext().mapCanvas() );
 
      if ( pointParam->flags() & Qgis::ProcessingParameterFlag::Optional )
        mPanel->setAllowNull( true );
 
      if ( type() == QgsProcessingGui::Standard )
        mPanel->setShowPointOnCanvas( true );
 
      mPanel->setToolTip( parameterDefinition()->toolTip() );
 
      connect( mPanel, &QgsProcessingPointPanel::changed, this, [=] {
        emit widgetValueHasChanged( this );
      } );
 
      if ( mDialog )
        setDialog( mDialog ); // setup connections to panel - dialog was previously set before the widget was created
      return mPanel;
    }
 
    case QgsProcessingGui::Modeler:
    {
      mLineEdit = new QLineEdit();
      mLineEdit->setToolTip( tr( "Point as 'x,y'" ) );
      connect( mLineEdit, &QLineEdit::textChanged, this, [=]( const QString & ) {
        emit widgetValueHasChanged( this );
      } );
      return mLineEdit;
    }
  }
  return nullptr;
}
 
void QgsProcessingPointWidgetWrapper::setWidgetContext( const QgsProcessingParameterWidgetContext &context )
{
  QgsAbstractProcessingParameterWidgetWrapper::setWidgetContext( context );
  if ( mPanel && context.mapCanvas() )
    mPanel->setMapCanvas( context.mapCanvas() );
}
 
void QgsProcessingPointWidgetWrapper::setDialog( QDialog *dialog )
{
  mDialog = dialog;
  if ( mPanel )
  {
    connect( mPanel, &QgsProcessingPointPanel::toggleDialogVisibility, mDialog, [=]( bool visible ) {
      if ( !visible )
        mDialog->showMinimized();
      else
      {
        mDialog->showNormal();
        mDialog->raise();
        mDialog->activateWindow();
      }
    } );
  }
  QgsAbstractProcessingParameterWidgetWrapper::setDialog( dialog );
}
 
void QgsProcessingPointWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mPanel )
  {
    if ( !value.isValid() || ( value.userType() == QMetaType::Type::QString && value.toString().isEmpty() ) )
      mPanel->clear();
    else
    {
      QgsPointXY p = QgsProcessingParameters::parameterAsPoint( parameterDefinition(), value, context );
      QgsCoordinateReferenceSystem crs = QgsProcessingParameters::parameterAsPointCrs( parameterDefinition(), value, context );
      mPanel->setValue( p, crs );
    }
  }
  else if ( mLineEdit )
  {
    const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
    mLineEdit->setText( v );
  }
}
 
QVariant QgsProcessingPointWidgetWrapper::widgetValue() const
{
  if ( mPanel )
  {
    return mPanel->value();
  }
  else if ( mLineEdit )
    return mLineEdit->text().isEmpty() ? QVariant() : mLineEdit->text();
  else
    return QVariant();
}
 
QStringList QgsProcessingPointWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterPoint::typeName()
         << QgsProcessingParameterString::typeName();
}
 
QStringList QgsProcessingPointWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingPointWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string of the format 'x,y' or a geometry value (centroid is used)" );
}
 
QString QgsProcessingPointWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterPoint::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingPointWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingPointWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingPointWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingPointParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingGeometryWidgetWrapper
//
 
 
QgsProcessingGeometryParameterDefinitionWidget::QgsProcessingGeometryParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mGeometryWidget = new QgsGeometryWidget();
  if ( const QgsProcessingParameterGeometry *geometryParam = dynamic_cast<const QgsProcessingParameterGeometry *>( definition ) )
  {
    QgsGeometry g = QgsProcessingParameters::parameterAsGeometry( geometryParam, geometryParam->defaultValueForGui(), context );
    if ( !g.isNull() )
    {
      mGeometryWidget->setGeometryValue( QgsReferencedGeometry( g, QgsCoordinateReferenceSystem() ) );
    }
  }
 
  vlayout->addWidget( mGeometryWidget );
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingGeometryParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  const QgsReferencedGeometry geometry = mGeometryWidget->geometryValue();
  auto param = std::make_unique<QgsProcessingParameterGeometry>( name, description, geometry.isEmpty() ? QVariant() : geometry.asWkt() );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingGeometryWidgetWrapper::QgsProcessingGeometryWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingGeometryWidgetWrapper::createWidget()
{
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Modeler:
    case QgsProcessingGui::Batch:
    {
      mGeometryWidget = new QgsGeometryWidget();
      mGeometryWidget->setToolTip( parameterDefinition()->toolTip() );
      connect( mGeometryWidget, &QgsGeometryWidget::geometryValueChanged, this, [=]( const QgsReferencedGeometry & ) {
        emit widgetValueHasChanged( this );
      } );
      return mGeometryWidget;
    }
  }
  return nullptr;
}
 
void QgsProcessingGeometryWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mGeometryWidget )
  {
    QgsGeometry g = QgsProcessingParameters::parameterAsGeometry( parameterDefinition(), value, context );
    if ( !g.isNull() )
    {
      mGeometryWidget->setGeometryValue( QgsReferencedGeometry( g, QgsCoordinateReferenceSystem() ) );
    }
    else
    {
      mGeometryWidget->clearGeometry();
    }
  }
}
 
QVariant QgsProcessingGeometryWidgetWrapper::widgetValue() const
{
  if ( mGeometryWidget )
  {
    const QgsReferencedGeometry geometry = mGeometryWidget->geometryValue();
    return geometry.isEmpty() ? QVariant() : geometry.asWkt();
  }
  else
  {
    return QVariant();
  }
}
 
QStringList QgsProcessingGeometryWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterGeometry::typeName()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterPoint::typeName()
         << QgsProcessingParameterExtent::typeName();
}
 
QStringList QgsProcessingGeometryWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingGeometryWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "string in the Well-Known-Text format or a geometry value" );
}
 
QString QgsProcessingGeometryWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterGeometry::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingGeometryWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingGeometryWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingGeometryWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingGeometryParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingColorWidgetWrapper
//
 
 
QgsProcessingColorParameterDefinitionWidget::QgsProcessingColorParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultColorButton = new QgsColorButton();
  mDefaultColorButton->setShowNull( true );
  mAllowOpacity = new QCheckBox( tr( "Allow opacity control" ) );
 
  if ( const QgsProcessingParameterColor *colorParam = dynamic_cast<const QgsProcessingParameterColor *>( definition ) )
  {
    const QColor c = QgsProcessingParameters::parameterAsColor( colorParam, colorParam->defaultValueForGui(), context );
    if ( !c.isValid() )
      mDefaultColorButton->setToNull();
    else
      mDefaultColorButton->setColor( c );
    mAllowOpacity->setChecked( colorParam->opacityEnabled() );
  }
  else
  {
    mDefaultColorButton->setToNull();
    mAllowOpacity->setChecked( true );
  }
 
  vlayout->addWidget( mDefaultColorButton );
  vlayout->addWidget( mAllowOpacity );
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingColorParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterColor>( name, description, mDefaultColorButton->color(), mAllowOpacity->isChecked() );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingColorWidgetWrapper::QgsProcessingColorWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingColorWidgetWrapper::createWidget()
{
  const QgsProcessingParameterColor *colorParam = dynamic_cast<const QgsProcessingParameterColor *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
    {
      mColorButton = new QgsColorButton( nullptr );
      mColorButton->setSizePolicy( QSizePolicy::Preferred, QSizePolicy::Fixed );
 
      if ( colorParam->flags() & Qgis::ProcessingParameterFlag::Optional )
        mColorButton->setShowNull( true );
 
      mColorButton->setAllowOpacity( colorParam->opacityEnabled() );
      mColorButton->setToolTip( parameterDefinition()->toolTip() );
      mColorButton->setColorDialogTitle( parameterDefinition()->description() );
      if ( colorParam->defaultValueForGui().value<QColor>().isValid() )
      {
        mColorButton->setDefaultColor( colorParam->defaultValueForGui().value<QColor>() );
      }
 
      connect( mColorButton, &QgsColorButton::colorChanged, this, [=] {
        emit widgetValueHasChanged( this );
      } );
 
      return mColorButton;
    }
  }
  return nullptr;
}
 
void QgsProcessingColorWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mColorButton )
  {
    if ( !value.isValid() || ( value.userType() == QMetaType::Type::QString && value.toString().isEmpty() )
         || ( value.userType() == QMetaType::Type::QColor && !value.value<QColor>().isValid() ) )
      mColorButton->setToNull();
    else
    {
      const QColor c = QgsProcessingParameters::parameterAsColor( parameterDefinition(), value, context );
      if ( !c.isValid() && mColorButton->showNull() )
        mColorButton->setToNull();
      else
        mColorButton->setColor( c );
    }
  }
}
 
QVariant QgsProcessingColorWidgetWrapper::widgetValue() const
{
  if ( mColorButton )
    return mColorButton->isNull() ? QVariant() : mColorButton->color();
  else
    return QVariant();
}
 
QStringList QgsProcessingColorWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterColor::typeName()
         << QgsProcessingParameterString::typeName();
}
 
QStringList QgsProcessingColorWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingColorWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "color style string, e.g. #ff0000 or 255,0,0" );
}
 
QString QgsProcessingColorWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterColor::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingColorWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingColorWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingColorWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingColorParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingCoordinateOperationWidgetWrapper
//
 
QgsProcessingCoordinateOperationParameterDefinitionWidget::QgsProcessingCoordinateOperationParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultLineEdit = new QLineEdit();
  if ( const QgsProcessingParameterCoordinateOperation *coordParam = dynamic_cast<const QgsProcessingParameterCoordinateOperation *>( definition ) )
    mDefaultLineEdit->setText( QgsProcessingParameters::parameterAsString( coordParam, coordParam->defaultValueForGui(), context ) );
  vlayout->addWidget( mDefaultLineEdit );
 
  mSourceParamComboBox = new QComboBox();
  mDestParamComboBox = new QComboBox();
  QString initialSource;
  QString initialDest;
  QgsCoordinateReferenceSystem sourceCrs;
  QgsCoordinateReferenceSystem destCrs;
  if ( const QgsProcessingParameterCoordinateOperation *itemParam = dynamic_cast<const QgsProcessingParameterCoordinateOperation *>( definition ) )
  {
    initialSource = itemParam->sourceCrsParameterName();
    initialDest = itemParam->destinationCrsParameterName();
    sourceCrs = QgsProcessingUtils::variantToCrs( itemParam->sourceCrs(), context );
    destCrs = QgsProcessingUtils::variantToCrs( itemParam->destinationCrs(), context );
  }
 
  mSourceParamComboBox->addItem( QString(), QString() );
  mDestParamComboBox->addItem( QString(), QString() );
  if ( auto *lModel = widgetContext.model() )
  {
    // populate combo box with other model input choices
    const QMap<QString, QgsProcessingModelParameter> components = lModel->parameterComponents();
    for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
    {
      if ( definition && it->parameterName() == definition->name() )
        continue;
 
      // TODO - we should probably filter this list?
      mSourceParamComboBox->addItem( it->parameterName(), it->parameterName() );
      mDestParamComboBox->addItem( it->parameterName(), it->parameterName() );
      if ( !initialSource.isEmpty() && initialSource == it->parameterName() )
      {
        mSourceParamComboBox->setCurrentIndex( mSourceParamComboBox->count() - 1 );
      }
      if ( !initialDest.isEmpty() && initialDest == it->parameterName() )
      {
        mDestParamComboBox->setCurrentIndex( mDestParamComboBox->count() - 1 );
      }
    }
  }
 
  if ( mSourceParamComboBox->count() == 1 && !initialSource.isEmpty() )
  {
    // if no source candidates found, we just add the existing one as a placeholder
    mSourceParamComboBox->addItem( initialSource, initialSource );
    mSourceParamComboBox->setCurrentIndex( mSourceParamComboBox->count() - 1 );
  }
  if ( mDestParamComboBox->count() == 1 && !initialDest.isEmpty() )
  {
    // if no dest candidates found, we just add the existing one as a placeholder
    mDestParamComboBox->addItem( initialDest, initialDest );
    mDestParamComboBox->setCurrentIndex( mDestParamComboBox->count() - 1 );
  }
 
  vlayout->addWidget( new QLabel( tr( "Source CRS parameter" ) ) );
  vlayout->addWidget( mSourceParamComboBox );
  vlayout->addWidget( new QLabel( tr( "Destination CRS parameter" ) ) );
  vlayout->addWidget( mDestParamComboBox );
 
  mStaticSourceWidget = new QgsProjectionSelectionWidget();
  mStaticSourceWidget->setOptionVisible( QgsProjectionSelectionWidget::CrsNotSet, true );
  mStaticSourceWidget->setCrs( sourceCrs );
  mStaticDestWidget = new QgsProjectionSelectionWidget();
  mStaticDestWidget->setOptionVisible( QgsProjectionSelectionWidget::CrsNotSet, true );
  mStaticDestWidget->setCrs( destCrs );
 
  vlayout->addWidget( new QLabel( tr( "Static source CRS" ) ) );
  vlayout->addWidget( mStaticSourceWidget );
  vlayout->addWidget( new QLabel( tr( "Static destination CRS" ) ) );
  vlayout->addWidget( mStaticDestWidget );
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingCoordinateOperationParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterCoordinateOperation>( name, description, mDefaultLineEdit->text(), mSourceParamComboBox->currentText(), mDestParamComboBox->currentText(), mStaticSourceWidget->crs().isValid() ? QVariant::fromValue( mStaticSourceWidget->crs() ) : QVariant(), mStaticDestWidget->crs().isValid() ? QVariant::fromValue( mStaticDestWidget->crs() ) : QVariant() );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingCoordinateOperationWidgetWrapper::QgsProcessingCoordinateOperationWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingCoordinateOperationWidgetWrapper::createWidget()
{
  const QgsProcessingParameterCoordinateOperation *coordParam = dynamic_cast<const QgsProcessingParameterCoordinateOperation *>( parameterDefinition() );
  QgsProcessingContext c;
  mSourceCrs = QgsProcessingUtils::variantToCrs( coordParam->sourceCrs(), c );
  mDestCrs = QgsProcessingUtils::variantToCrs( coordParam->destinationCrs(), c );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    {
      mOperationWidget = new QgsCoordinateOperationWidget( nullptr );
      mOperationWidget->setShowMakeDefault( false );
      mOperationWidget->setShowFallbackOption( false );
      mOperationWidget->setToolTip( parameterDefinition()->toolTip() );
      mOperationWidget->setSourceCrs( mSourceCrs );
      mOperationWidget->setDestinationCrs( mDestCrs );
      mOperationWidget->setMapCanvas( mCanvas );
      if ( !coordParam->defaultValueForGui().toString().isEmpty() )
      {
        QgsCoordinateOperationWidget::OperationDetails deets;
        deets.proj = coordParam->defaultValueForGui().toString();
        mOperationWidget->setSelectedOperation( deets );
      }
 
      connect( mOperationWidget, &QgsCoordinateOperationWidget::operationChanged, this, [=] {
        emit widgetValueHasChanged( this );
      } );
 
      return mOperationWidget;
    }
 
    case QgsProcessingGui::Batch:
    case QgsProcessingGui::Modeler:
    {
      mLineEdit = new QLineEdit();
      QHBoxLayout *layout = new QHBoxLayout();
      layout->addWidget( mLineEdit, 1 );
      connect( mLineEdit, &QLineEdit::textChanged, this, [=] {
        emit widgetValueHasChanged( this );
      } );
 
      QToolButton *button = new QToolButton();
      button->setText( QString( QChar( 0x2026 ) ) );
      connect( button, &QToolButton::clicked, this, [=] {
        QgsDatumTransformDialog dlg( mSourceCrs, mDestCrs, false, false, false, qMakePair( -1, -1 ), button, Qt::WindowFlags(), mLineEdit->text(), mCanvas );
        if ( dlg.exec() )
        {
          mLineEdit->setText( dlg.selectedDatumTransform().proj );
          emit widgetValueHasChanged( this );
        }
      } );
      layout->addWidget( button );
 
      QWidget *w = new QWidget();
      layout->setContentsMargins( 0, 0, 0, 0 );
      w->setLayout( layout );
      return w;
    }
  }
  return nullptr;
}
 
void QgsProcessingCoordinateOperationWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
{
  QgsAbstractProcessingParameterWidgetWrapper::postInitialize( wrappers );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      for ( const QgsAbstractProcessingParameterWidgetWrapper *wrapper : wrappers )
      {
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterCoordinateOperation *>( parameterDefinition() )->sourceCrsParameterName() )
        {
          setSourceCrsParameterValue( wrapper->parameterValue() );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setSourceCrsParameterValue( wrapper->parameterValue() );
          } );
        }
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterCoordinateOperation *>( parameterDefinition() )->destinationCrsParameterName() )
        {
          setDestinationCrsParameterValue( wrapper->parameterValue() );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setDestinationCrsParameterValue( wrapper->parameterValue() );
          } );
        }
      }
      break;
    }
 
    case QgsProcessingGui::Modeler:
      break;
  }
}
 
void QgsProcessingCoordinateOperationWidgetWrapper::setWidgetContext( const QgsProcessingParameterWidgetContext &context )
{
  mCanvas = context.mapCanvas();
  if ( mOperationWidget )
    mOperationWidget->setMapCanvas( context.mapCanvas() );
}
 
void QgsProcessingCoordinateOperationWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext & )
{
  if ( mOperationWidget )
  {
    if ( !value.isValid() || ( value.userType() == QMetaType::Type::QString ) )
    {
      QgsCoordinateOperationWidget::OperationDetails deets;
      deets.proj = value.toString();
      mOperationWidget->setSelectedOperation( deets );
    }
  }
  if ( mLineEdit )
  {
    if ( !value.isValid() || ( value.userType() == QMetaType::Type::QString ) )
    {
      mLineEdit->setText( value.toString() );
    }
  }
}
 
QVariant QgsProcessingCoordinateOperationWidgetWrapper::widgetValue() const
{
  if ( mOperationWidget )
    return mOperationWidget->selectedOperation().proj;
  else if ( mLineEdit )
    return mLineEdit->text();
  else
    return QVariant();
}
 
QStringList QgsProcessingCoordinateOperationWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterCoordinateOperation::typeName()
         << QgsProcessingParameterString::typeName();
}
 
QStringList QgsProcessingCoordinateOperationWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingCoordinateOperationWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "Proj coordinate operation string, e.g. '+proj=pipeline +step +inv...'" );
}
 
void QgsProcessingCoordinateOperationWidgetWrapper::setSourceCrsParameterValue( const QVariant &value )
{
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  mSourceCrs = QgsProcessingUtils::variantToCrs( value, *context );
  if ( mOperationWidget )
  {
    mOperationWidget->setSourceCrs( mSourceCrs );
    mOperationWidget->setSelectedOperationUsingContext( context->transformContext() );
  }
}
 
void QgsProcessingCoordinateOperationWidgetWrapper::setDestinationCrsParameterValue( const QVariant &value )
{
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  mDestCrs = QgsProcessingUtils::variantToCrs( value, *context );
  if ( mOperationWidget )
  {
    mOperationWidget->setDestinationCrs( mDestCrs );
    mOperationWidget->setSelectedOperationUsingContext( context->transformContext() );
  }
}
 
QString QgsProcessingCoordinateOperationWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterCoordinateOperation::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingCoordinateOperationWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingCoordinateOperationWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingCoordinateOperationWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingCoordinateOperationParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingFieldPanelWidget
//
 
QgsProcessingFieldPanelWidget::QgsProcessingFieldPanelWidget( QWidget *parent, const QgsProcessingParameterField *param )
  : QWidget( parent )
  , mParam( param )
{
  QHBoxLayout *hl = new QHBoxLayout();
  hl->setContentsMargins( 0, 0, 0, 0 );
 
  mLineEdit = new QLineEdit();
  mLineEdit->setEnabled( false );
  hl->addWidget( mLineEdit, 1 );
 
  mToolButton = new QToolButton();
  mToolButton->setText( QString( QChar( 0x2026 ) ) );
  hl->addWidget( mToolButton );
 
  setLayout( hl );
 
  if ( mParam )
  {
    mLineEdit->setText( tr( "%n field(s) selected", nullptr, 0 ) );
  }
 
  connect( mToolButton, &QToolButton::clicked, this, &QgsProcessingFieldPanelWidget::showDialog );
}
 
void QgsProcessingFieldPanelWidget::setFields( const QgsFields &fields )
{
  mFields = fields;
}
 
void QgsProcessingFieldPanelWidget::setValue( const QVariant &value )
{
  if ( value.isValid() )
    mValue = value.userType() == QMetaType::Type::QVariantList ? value.toList() : QVariantList() << value;
  else
    mValue.clear();
 
  updateSummaryText();
  emit changed();
}
 
void QgsProcessingFieldPanelWidget::showDialog()
{
  QVariantList availableOptions;
  availableOptions.reserve( mFields.size() );
  for ( const QgsField &field : std::as_const( mFields ) )
  {
    availableOptions << field.name();
  }
 
  QgsPanelWidget *panel = QgsPanelWidget::findParentPanel( this );
  if ( panel && panel->dockMode() )
  {
    QgsProcessingMultipleSelectionPanelWidget *widget = new QgsProcessingMultipleSelectionPanelWidget( availableOptions, mValue );
    widget->setPanelTitle( mParam->description() );
 
    widget->setValueFormatter( []( const QVariant &v ) -> QString {
      return v.toString();
    } );
 
    connect( widget, &QgsProcessingMultipleSelectionPanelWidget::selectionChanged, this, [=]() {
      setValue( widget->selectedOptions() );
    } );
    connect( widget, &QgsProcessingMultipleSelectionPanelWidget::acceptClicked, widget, &QgsPanelWidget::acceptPanel );
    panel->openPanel( widget );
  }
  else
  {
    QgsProcessingMultipleSelectionDialog dlg( availableOptions, mValue, this, Qt::WindowFlags() );
 
    dlg.setValueFormatter( []( const QVariant &v ) -> QString {
      return v.toString();
    } );
    if ( dlg.exec() )
    {
      setValue( dlg.selectedOptions() );
    }
  }
}
 
void QgsProcessingFieldPanelWidget::updateSummaryText()
{
  if ( !mParam )
    return;
 
  if ( mValue.empty() )
  {
    mLineEdit->setText( tr( "%n field(s) selected", nullptr, 0 ) );
  }
  else
  {
    QStringList values;
    values.reserve( mValue.size() );
    for ( const QVariant &val : std::as_const( mValue ) )
    {
      values << val.toString();
    }
 
    const QString concatenated = values.join( tr( "," ) );
    if ( concatenated.length() < 100 )
      mLineEdit->setText( concatenated );
    else
      mLineEdit->setText( tr( "%n field(s) selected", nullptr, mValue.count() ) );
  }
}
 
 
//
// QgsProcessingFieldWidgetWrapper
//
 
QgsProcessingFieldParameterDefinitionWidget::QgsProcessingFieldParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Parent layer" ) ) );
  mParentLayerComboBox = new QComboBox();
 
  QString initialParent;
  if ( const QgsProcessingParameterField *fieldParam = dynamic_cast<const QgsProcessingParameterField *>( definition ) )
    initialParent = fieldParam->parentLayerParameterName();
 
  if ( auto *lModel = widgetContext.model() )
  {
    // populate combo box with other model input choices
    const QMap<QString, QgsProcessingModelParameter> components = lModel->parameterComponents();
    for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
    {
      if ( const QgsProcessingParameterFeatureSource *definition = dynamic_cast<const QgsProcessingParameterFeatureSource *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterVectorLayer *definition = dynamic_cast<const QgsProcessingParameterVectorLayer *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        mParentLayerComboBox->addItem( definition->description(), definition->name() );
        if ( !initialParent.isEmpty() && initialParent == definition->name() )
        {
          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
        }
      }
      else if ( const QgsProcessingParameterMultipleLayers *definition = dynamic_cast<const QgsProcessingParameterMultipleLayers *>( lModel->parameterDefinition( it.value().parameterName() ) ) )
      {
        if ( definition->layerType() == Qgis::ProcessingSourceType::Vector )
        {
          mParentLayerComboBox->addItem( definition->description(), definition->name() );
          if ( !initialParent.isEmpty() && initialParent == definition->name() )
          {
            mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
          }
        }
      }
    }
  }
 
  if ( mParentLayerComboBox->count() == 0 && !initialParent.isEmpty() )
  {
    // if no parent candidates found, we just add the existing one as a placeholder
    mParentLayerComboBox->addItem( initialParent, initialParent );
    mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
  }
 
  vlayout->addWidget( mParentLayerComboBox );
 
  vlayout->addWidget( new QLabel( tr( "Allowed data type" ) ) );
  mDataTypeComboBox = new QComboBox();
  mDataTypeComboBox->addItem( tr( "Any" ), static_cast<int>( Qgis::ProcessingFieldParameterDataType::Any ) );
  mDataTypeComboBox->addItem( tr( "Number" ), static_cast<int>( Qgis::ProcessingFieldParameterDataType::Numeric ) );
  mDataTypeComboBox->addItem( tr( "String" ), static_cast<int>( Qgis::ProcessingFieldParameterDataType::String ) );
  mDataTypeComboBox->addItem( tr( "Date/time" ), static_cast<int>( Qgis::ProcessingFieldParameterDataType::DateTime ) );
  mDataTypeComboBox->addItem( tr( "Binary" ), static_cast<int>( Qgis::ProcessingFieldParameterDataType::Binary ) );
  mDataTypeComboBox->addItem( tr( "Boolean" ), static_cast<int>( Qgis::ProcessingFieldParameterDataType::Boolean ) );
  if ( const QgsProcessingParameterField *fieldParam = dynamic_cast<const QgsProcessingParameterField *>( definition ) )
    mDataTypeComboBox->setCurrentIndex( mDataTypeComboBox->findData( static_cast<int>( fieldParam->dataType() ) ) );
 
  vlayout->addWidget( mDataTypeComboBox );
 
  mAllowMultipleCheckBox = new QCheckBox( tr( "Accept multiple fields" ) );
  if ( const QgsProcessingParameterField *fieldParam = dynamic_cast<const QgsProcessingParameterField *>( definition ) )
    mAllowMultipleCheckBox->setChecked( fieldParam->allowMultiple() );
 
  vlayout->addWidget( mAllowMultipleCheckBox );
 
  mDefaultToAllCheckBox = new QCheckBox( tr( "Select all fields by default" ) );
  mDefaultToAllCheckBox->setEnabled( mAllowMultipleCheckBox->isChecked() );
  if ( const QgsProcessingParameterField *fieldParam = dynamic_cast<const QgsProcessingParameterField *>( definition ) )
    mDefaultToAllCheckBox->setChecked( fieldParam->defaultToAllFields() );
 
  vlayout->addWidget( mDefaultToAllCheckBox );
 
  connect( mAllowMultipleCheckBox, &QCheckBox::stateChanged, this, [=] {
    mDefaultToAllCheckBox->setEnabled( mAllowMultipleCheckBox->isChecked() );
  } );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultLineEdit = new QLineEdit();
  mDefaultLineEdit->setToolTip( tr( "Default field name, or ; separated list of field names for multiple field parameters" ) );
  if ( const QgsProcessingParameterField *fieldParam = dynamic_cast<const QgsProcessingParameterField *>( definition ) )
  {
    const QStringList fields = QgsProcessingParameters::parameterAsStrings( fieldParam, fieldParam->defaultValueForGui(), context );
    mDefaultLineEdit->setText( fields.join( ';' ) );
  }
  vlayout->addWidget( mDefaultLineEdit );
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingFieldParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  Qgis::ProcessingFieldParameterDataType dataType = static_cast<Qgis::ProcessingFieldParameterDataType>( mDataTypeComboBox->currentData().toInt() );
 
  QVariant defaultValue;
  if ( !mDefaultLineEdit->text().trimmed().isEmpty() )
  {
    defaultValue = mDefaultLineEdit->text();
  }
  auto param = std::make_unique<QgsProcessingParameterField>( name, description, defaultValue, mParentLayerComboBox->currentData().toString(), dataType, mAllowMultipleCheckBox->isChecked(), false, mDefaultToAllCheckBox->isChecked() );
  param->setFlags( flags );
  return param.release();
}
 
QgsProcessingFieldWidgetWrapper::QgsProcessingFieldWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingFieldWidgetWrapper::createWidget()
{
  const QgsProcessingParameterField *fieldParam = dynamic_cast<const QgsProcessingParameterField *>( parameterDefinition() );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      if ( fieldParam->allowMultiple() )
      {
        mPanel = new QgsProcessingFieldPanelWidget( nullptr, fieldParam );
        mPanel->setToolTip( parameterDefinition()->toolTip() );
        connect( mPanel, &QgsProcessingFieldPanelWidget::changed, this, [=] {
          emit widgetValueHasChanged( this );
        } );
        return mPanel;
      }
      else
      {
        mComboBox = new QgsFieldComboBox();
        mComboBox->setAllowEmptyFieldName( fieldParam->flags() & Qgis::ProcessingParameterFlag::Optional );
 
        if ( fieldParam->dataType() == Qgis::ProcessingFieldParameterDataType::Numeric )
          mComboBox->setFilters( QgsFieldProxyModel::Numeric );
        else if ( fieldParam->dataType() == Qgis::ProcessingFieldParameterDataType::String )
          mComboBox->setFilters( QgsFieldProxyModel::String );
        else if ( fieldParam->dataType() == Qgis::ProcessingFieldParameterDataType::DateTime )
          mComboBox->setFilters( QgsFieldProxyModel::Date | QgsFieldProxyModel::Time | QgsFieldProxyModel::DateTime );
        else if ( fieldParam->dataType() == Qgis::ProcessingFieldParameterDataType::Binary )
          mComboBox->setFilters( QgsFieldProxyModel::Binary );
        else if ( fieldParam->dataType() == Qgis::ProcessingFieldParameterDataType::Boolean )
          mComboBox->setFilters( QgsFieldProxyModel::Boolean );
 
        mComboBox->setToolTip( parameterDefinition()->toolTip() );
        connect( mComboBox, &QgsFieldComboBox::fieldChanged, this, [=]( const QString & ) {
          emit widgetValueHasChanged( this );
        } );
        return mComboBox;
      }
    }
 
    case QgsProcessingGui::Modeler:
    {
      mLineEdit = new QLineEdit();
      mLineEdit->setToolTip( QObject::tr( "Name of field (separate field names with ; for multiple field parameters)" ) );
      connect( mLineEdit, &QLineEdit::textChanged, this, [=] {
        emit widgetValueHasChanged( this );
      } );
      return mLineEdit;
    }
  }
  return nullptr;
}
 
void QgsProcessingFieldWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
{
  QgsAbstractProcessingParameterWidgetWrapper::postInitialize( wrappers );
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
    {
      for ( const QgsAbstractProcessingParameterWidgetWrapper *wrapper : wrappers )
      {
        if ( wrapper->parameterDefinition()->name() == static_cast<const QgsProcessingParameterField *>( parameterDefinition() )->parentLayerParameterName() )
        {
          setParentLayerWrapperValue( wrapper );
          connect( wrapper, &QgsAbstractProcessingParameterWidgetWrapper::widgetValueHasChanged, this, [=] {
            setParentLayerWrapperValue( wrapper );
          } );
          break;
        }
      }
      break;
    }
 
    case QgsProcessingGui::Modeler:
      break;
  }
}
 
void QgsProcessingFieldWidgetWrapper::setParentLayerWrapperValue( const QgsAbstractProcessingParameterWidgetWrapper *parentWrapper )
{
  // evaluate value to layer
  QgsProcessingContext *context = nullptr;
  std::unique_ptr<QgsProcessingContext> tmpContext;
  if ( mProcessingContextGenerator )
    context = mProcessingContextGenerator->processingContext();
 
  if ( !context )
  {
    tmpContext = std::make_unique<QgsProcessingContext>();
    context = tmpContext.get();
  }
 
  QVariant value = parentWrapper->parameterValue();
 
  if ( value.userType() == qMetaTypeId<QgsProcessingFeatureSourceDefinition>() )
  {
    // input is a QgsProcessingFeatureSourceDefinition - source from it.
    // this is normally discouraged, and algorithms should NEVER do this -- but in this case we can make
    // certain assumptions due to the fact that we're calling this outside of algorithm/model execution and all sources
    // should be real map layers at this stage
    QgsProcessingFeatureSourceDefinition fromVar = qvariant_cast<QgsProcessingFeatureSourceDefinition>( value );
    value = fromVar.source;
  }
 
  bool valueSet = false;
  const QList<QgsMapLayer *> layers = QgsProcessingParameters::parameterAsLayerList( parentWrapper->parameterDefinition(), value, *context );
 
  // several layers, populate with intersection of layers fields
  if ( layers.count() > 1 )
  {
    QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( layers.at( 0 ) );
    QgsFields fields = vlayer && vlayer->isValid() ? vlayer->fields() : QgsFields();
    const QList<QgsMapLayer *> remainingLayers = layers.mid( 1 );
    for ( QgsMapLayer *layer : remainingLayers )
    {
      if ( fields.isEmpty() )
        break;
 
      QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( layer );
      if ( !vlayer || !vlayer->isValid() )
      {
        fields = QgsFields();
        break;
      }
 
      for ( int fieldIdx = fields.count() - 1; fieldIdx >= 0; fieldIdx-- )
      {
        if ( vlayer->fields().lookupField( fields.at( fieldIdx ).name() ) < 0 )
          fields.remove( fieldIdx );
      }
    }
 
    if ( mComboBox )
      mComboBox->setFields( fields );
    else if ( mPanel )
      mPanel->setFields( filterFields( fields ) );
 
    valueSet = true;
  }
 
  // only one layer
  if ( !valueSet && !layers.isEmpty() && layers.at( 0 )->isValid() )
  {
    QgsVectorLayer *layer = qobject_cast<QgsVectorLayer *>( layers.at( 0 ) );
 
    // need to grab ownership of layer if required - otherwise layer may be deleted when context
    // goes out of scope
    std::unique_ptr<QgsMapLayer> ownedLayer( context->takeResultLayer( layer->id() ) );
    if ( ownedLayer && ownedLayer->type() == Qgis::LayerType::Vector )
    {
      mParentLayer.reset( qobject_cast<QgsVectorLayer *>( ownedLayer.release() ) );
      layer = mParentLayer.get();
    }
    else
    {
      // don't need ownership of this layer - it wasn't owned by context (so e.g. is owned by the project)
    }
 
    if ( mComboBox )
      mComboBox->setLayer( layer );
    else if ( mPanel )
      mPanel->setFields( filterFields( layer->fields() ) );
 
    valueSet = true;
  }
 
  if ( !valueSet )
  {
    std::unique_ptr<QgsProcessingFeatureSource> source( QgsProcessingParameters::parameterAsSource( parentWrapper->parameterDefinition(), value, *context ) );
    if ( source )
    {
      const QgsFields fields = source->fields();
      if ( mComboBox )
        mComboBox->setFields( fields );
      else if ( mPanel )
        mPanel->setFields( filterFields( fields ) );
 
      valueSet = true;
    }
  }
 
  if ( !valueSet )
  {
    if ( mComboBox )
      mComboBox->setLayer( nullptr );
    else if ( mPanel )
      mPanel->setFields( QgsFields() );
 
    if ( value.isValid() && widgetContext().messageBar() )
    {
      widgetContext().messageBar()->clearWidgets();
      widgetContext().messageBar()->pushMessage( QString(), QObject::tr( "Could not load selected layer/table. Dependent field could not be populated" ), Qgis::MessageLevel::Info );
    }
    return;
  }
 
  const QgsProcessingParameterField *fieldParam = static_cast<const QgsProcessingParameterField *>( parameterDefinition() );
  if ( mPanel && fieldParam->defaultToAllFields() )
  {
    QVariantList val;
    val.reserve( mPanel->fields().size() );
    for ( const QgsField &field : mPanel->fields() )
      val << field.name();
    setWidgetValue( val, *context );
  }
  else if ( fieldParam->defaultValueForGui().isValid() )
    setWidgetValue( parameterDefinition()->defaultValueForGui(), *context );
}
 
void QgsProcessingFieldWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mComboBox )
  {
    if ( !value.isValid() )
      mComboBox->setField( QString() );
    else
    {
      const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
      mComboBox->setField( v );
    }
  }
  else if ( mPanel )
  {
    QVariantList opts;
    if ( value.isValid() )
    {
      const QStringList v = QgsProcessingParameters::parameterAsStrings( parameterDefinition(), value, context );
      opts.reserve( v.size() );
      for ( const QString &i : v )
        opts << i;
    }
    if ( mPanel )
      mPanel->setValue( opts );
  }
  else if ( mLineEdit )
  {
    const QgsProcessingParameterField *fieldParam = static_cast<const QgsProcessingParameterField *>( parameterDefinition() );
    if ( fieldParam->allowMultiple() )
    {
      const QStringList v = QgsProcessingParameters::parameterAsStrings( parameterDefinition(), value, context );
      mLineEdit->setText( v.join( ';' ) );
    }
    else
    {
      mLineEdit->setText( QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context ) );
    }
  }
}
 
QVariant QgsProcessingFieldWidgetWrapper::widgetValue() const
{
  if ( mComboBox )
    return mComboBox->currentField();
  else if ( mPanel )
    return mPanel->value();
  else if ( mLineEdit )
  {
    const QgsProcessingParameterField *fieldParam = static_cast<const QgsProcessingParameterField *>( parameterDefinition() );
    if ( fieldParam->allowMultiple() )
    {
      return mLineEdit->text().split( ';' );
    }
    else
      return mLineEdit->text();
  }
  else
    return QVariant();
}
 
QStringList QgsProcessingFieldWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterField::typeName()
         << QgsProcessingParameterString::typeName();
}
 
QStringList QgsProcessingFieldWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingFieldWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "selected field names as an array of names, or semicolon separated string of options (e.g. 'fid;place_name')" );
}
 
const QgsVectorLayer *QgsProcessingFieldWidgetWrapper::linkedVectorLayer() const
{
  if ( mComboBox && mComboBox->layer() )
    return mComboBox->layer();
 
  return QgsAbstractProcessingParameterWidgetWrapper::linkedVectorLayer();
}
 
QgsFields QgsProcessingFieldWidgetWrapper::filterFields( const QgsFields &fields ) const
{
  const QgsProcessingParameterField *fieldParam = static_cast<const QgsProcessingParameterField *>( parameterDefinition() );
  QgsFields res;
  for ( const QgsField &f : fields )
  {
    switch ( fieldParam->dataType() )
    {
      case Qgis::ProcessingFieldParameterDataType::Any:
        res.append( f );
        break;
 
      case Qgis::ProcessingFieldParameterDataType::Numeric:
        if ( f.isNumeric() )
          res.append( f );
        break;
 
      case Qgis::ProcessingFieldParameterDataType::String:
        if ( f.type() == QMetaType::Type::QString )
          res.append( f );
        break;
 
      case Qgis::ProcessingFieldParameterDataType::DateTime:
        if ( f.type() == QMetaType::Type::QDate || f.type() == QMetaType::Type::QTime || f.type() == QMetaType::Type::QDateTime )
          res.append( f );
        break;
 
      case Qgis::ProcessingFieldParameterDataType::Binary:
        if ( f.type() == QMetaType::Type::QByteArray )
          res.append( f );
        break;
 
      case Qgis::ProcessingFieldParameterDataType::Boolean:
        if ( f.type() == QMetaType::Type::Bool )
          res.append( f );
        break;
    }
  }
 
  return res;
}
 
QString QgsProcessingFieldWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterField::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingFieldWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingFieldWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingFieldWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingFieldParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
//
// QgsProcessingMapThemeWidgetWrapper
//
 
 
QgsProcessingMapThemeParameterDefinitionWidget::QgsProcessingMapThemeParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
 
  mDefaultComboBox = new QComboBox();
  mDefaultComboBox->addItem( QString(), QVariant( -1 ) );
 
  const QStringList mapThemes = widgetContext.project() ? widgetContext.project()->mapThemeCollection()->mapThemes() : QgsProject::instance()->mapThemeCollection()->mapThemes();
  for ( const QString &theme : mapThemes )
  {
    mDefaultComboBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mActionShowAllLayers.svg" ) ), theme, theme );
  }
  mDefaultComboBox->setEditable( true );
 
  if ( const QgsProcessingParameterMapTheme *themeParam = dynamic_cast<const QgsProcessingParameterMapTheme *>( definition ) )
  {
    if ( themeParam->defaultValueForGui().isValid() )
      mDefaultComboBox->setCurrentText( QgsProcessingParameters::parameterAsString( themeParam, themeParam->defaultValueForGui(), context ) );
    else
      mDefaultComboBox->setCurrentIndex( mDefaultComboBox->findData( -1 ) );
  }
  else
    mDefaultComboBox->setCurrentIndex( mDefaultComboBox->findData( -1 ) );
 
  vlayout->addWidget( mDefaultComboBox );
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingMapThemeParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  QVariant defaultVal;
  if ( mDefaultComboBox->currentText().isEmpty() )
    defaultVal = QVariant();
  else
    defaultVal = mDefaultComboBox->currentText();
  auto param = std::make_unique<QgsProcessingParameterMapTheme>( name, description, defaultVal );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingMapThemeWidgetWrapper::QgsProcessingMapThemeWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingMapThemeWidgetWrapper::createWidget()
{
  const QgsProcessingParameterMapTheme *themeParam = dynamic_cast<const QgsProcessingParameterMapTheme *>( parameterDefinition() );
 
  mComboBox = new QComboBox();
 
  if ( themeParam->flags() & Qgis::ProcessingParameterFlag::Optional )
    mComboBox->addItem( tr( "[Not selected]" ), QVariant( -1 ) );
 
  const QStringList mapThemes = widgetContext().project() ? widgetContext().project()->mapThemeCollection()->mapThemes() : QgsProject::instance()->mapThemeCollection()->mapThemes();
  for ( const QString &theme : mapThemes )
  {
    mComboBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mActionShowAllLayers.svg" ) ), theme, theme );
  }
 
  switch ( type() )
  {
    case QgsProcessingGui::Standard:
    case QgsProcessingGui::Batch:
      break;
 
    case QgsProcessingGui::Modeler:
      mComboBox->setEditable( true );
      break;
  }
 
  mComboBox->setToolTip( parameterDefinition()->toolTip() );
  connect( mComboBox, qOverload<int>( &QComboBox::currentIndexChanged ), this, [=]( int ) {
    emit widgetValueHasChanged( this );
  } );
 
  return mComboBox;
}
 
void QgsProcessingMapThemeWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  const QString v = QgsProcessingParameters::parameterAsString( parameterDefinition(), value, context );
 
  if ( !value.isValid() )
    mComboBox->setCurrentIndex( mComboBox->findData( QVariant( -1 ) ) );
  else
  {
    if ( mComboBox->isEditable() && mComboBox->findData( v ) == -1 )
    {
      const QString prev = mComboBox->currentText();
      mComboBox->setCurrentText( v );
      if ( prev != v )
        emit widgetValueHasChanged( this );
    }
    else
      mComboBox->setCurrentIndex( mComboBox->findData( v ) );
  }
}
 
QVariant QgsProcessingMapThemeWidgetWrapper::widgetValue() const
{
  if ( mComboBox )
    return mComboBox->currentData().toInt() == -1 ? QVariant() : !mComboBox->currentData().isValid() && mComboBox->isEditable() ? mComboBox->currentText().isEmpty() ? QVariant() : QVariant( mComboBox->currentText() )
                                                                                                                                : mComboBox->currentData();
  else
    return QVariant();
}
 
QStringList QgsProcessingMapThemeWidgetWrapper::compatibleParameterTypes() const
{
  return QStringList()
         << QgsProcessingParameterString::typeName()
         << QgsProcessingParameterExpression::typeName();
}
 
QStringList QgsProcessingMapThemeWidgetWrapper::compatibleOutputTypes() const
{
  return QStringList()
         << QgsProcessingOutputString::typeName()
         << QgsProcessingOutputVariant::typeName();
}
 
QString QgsProcessingMapThemeWidgetWrapper::modelerExpressionFormatString() const
{
  return tr( "map theme as a string value (e.g. 'base maps')" );
}
 
QString QgsProcessingMapThemeWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterMapTheme::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingMapThemeWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type )
{
  return new QgsProcessingMapThemeWidgetWrapper( parameter, type );
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingMapThemeWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingMapThemeParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
 
//
// QgsProcessingDateTimeWidgetWrapper
//
 
 
QgsProcessingDateTimeParameterDefinitionWidget::QgsProcessingDateTimeParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
{
  QVBoxLayout *vlayout = new QVBoxLayout();
  vlayout->setContentsMargins( 0, 0, 0, 0 );
 
  vlayout->addWidget( new QLabel( tr( "Type" ) ) );
 
  mTypeComboBox = new QComboBox();
  mTypeComboBox->addItem( tr( "Date and Time" ), static_cast<int>( Qgis::ProcessingDateTimeParameterDataType::DateTime ) );
  mTypeComboBox->addItem( tr( "Date" ), static_cast<int>( Qgis::ProcessingDateTimeParameterDataType::Date ) );
  mTypeComboBox->addItem( tr( "Time" ), static_cast<int>( Qgis::ProcessingDateTimeParameterDataType::Time ) );
  if ( const QgsProcessingParameterDateTime *datetimeParam = dynamic_cast<const QgsProcessingParameterDateTime *>( definition ) )
    mTypeComboBox->setCurrentIndex( mTypeComboBox->findData( static_cast<int>( datetimeParam->dataType() ) ) );
  else
    mTypeComboBox->setCurrentIndex( 0 );
  vlayout->addWidget( mTypeComboBox );
 
  setLayout( vlayout );
}
 
QgsProcessingParameterDefinition *QgsProcessingDateTimeParameterDefinitionWidget::createParameter( const QString &name, const QString &description, Qgis::ProcessingParameterFlags flags ) const
{
  auto param = std::make_unique<QgsProcessingParameterDateTime>( name, description );
  param->setDataType( static_cast<Qgis::ProcessingDateTimeParameterDataType>( mTypeComboBox->currentData().toInt() ) );
  param->setFlags( flags );
  return param.release();
}
 
 
QgsProcessingDateTimeWidgetWrapper::QgsProcessingDateTimeWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QWidget *QgsProcessingDateTimeWidgetWrapper::createWidget()
{
  const QgsProcessingParameterDateTime *dateTimeParam = dynamic_cast<const QgsProcessingParameterDateTime *>( parameterDefinition() );
 
  QgsDateTimeEdit *widget = nullptr;
  switch ( dateTimeParam->dataType() )
  {
    case Qgis::ProcessingDateTimeParameterDataType::DateTime:
      mDateTimeEdit = new QgsDateTimeEdit();
      widget = mDateTimeEdit;
      break;
 
    case Qgis::ProcessingDateTimeParameterDataType::Date:
      mDateEdit = new QgsDateEdit();
      widget = mDateEdit;
      break;
 
    case Qgis::ProcessingDateTimeParameterDataType::Time:
      mTimeEdit = new QgsTimeEdit();
      widget = mTimeEdit;
      break;
  }
 
  if ( dateTimeParam->flags() & Qgis::ProcessingParameterFlag::Optional )
  {
    widget->setNullRepresentation( tr( "[Not selected]" ) );
    widget->setAllowNull( true );
  }
  else
  {
    widget->setAllowNull( false );
  }
  widget->setToolTip( parameterDefinition()->toolTip() );
 
  if ( mDateTimeEdit )
  {
    connect( mDateTimeEdit, &QgsDateTimeEdit::valueChanged, this, [=]( const QDateTime & ) {
      emit widgetValueHasChanged( this );
    } );
  }
  else if ( mDateEdit )
  {
    connect( mDateEdit, &QgsDateEdit::dateValueChanged, this, [=]( const QDate & ) {
      emit widgetValueHasChanged( this );
    } );
  }
  else if ( mTimeEdit )
  {
    connect( mTimeEdit, &QgsTimeEdit::timeValueChanged, this, [=]( const QTime & ) {
      emit widgetValueHasChanged( this );
    } );
  }
 
  return widget;
}
 
QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingDateTimeWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
{
  return new QgsProcessingDateTimeParameterDefinitionWidget( context, widgetContext, definition, algorithm );
}
 
void QgsProcessingDateTimeWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  if ( mDateTimeEdit )
  {
    mDateTimeEdit->setDateTime( QgsProcessingParameters::parameterAsDateTime( parameterDefinition(), value, context ) );
  }
  else if ( mDateEdit )
  {
    mDateEdit->setDate( QgsProcessingParameters::parameterAsDate( parameterDefinition(),