qgsfielddomainwidget.cpp

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/***************************************************************************
    qgsfielddomainwidget.cpp
    ------------------
    Date                 : February 2022
    Copyright            : (C) 2022 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 "qgsfielddomainwidget.h"
 
#include "qgsfielddomain.h"
#include "qgsgui.h"
#include "qgshelp.h"
#include "qgsvariantutils.h"
 
#include <QDialogButtonBox>
#include <QPushButton>
#include <QString>
 
#include "moc_qgsfielddomainwidget.cpp"
 
using namespace Qt::StringLiterals;
 
//
// QgsAbstractFieldDomainWidget
//
 
QgsAbstractFieldDomainWidget::QgsAbstractFieldDomainWidget( QWidget *parent )
  : QWidget( parent )
{
}
 
QgsAbstractFieldDomainWidget::~QgsAbstractFieldDomainWidget() = default;
 
 
//
// QgsRangeDomainWidget
//
 
QgsRangeDomainWidget::QgsRangeDomainWidget( QWidget *parent )
  : QgsAbstractFieldDomainWidget( parent )
{
  setupUi( this );
 
 
  mMinSpinBox->setMinimum( std::numeric_limits<double>::lowest() );
  mMinSpinBox->setMaximum( std::numeric_limits<double>::max() );
  mMinSpinBox->setValue( 0 );
  mMinSpinBox->setDecimals( 6 );
 
  mMaxSpinBox->setMinimum( std::numeric_limits<double>::lowest() );
  mMaxSpinBox->setMaximum( std::numeric_limits<double>::max() );
  // any value we pick here is wrong!
  mMaxSpinBox->setValue( 100 );
  mMaxSpinBox->setDecimals( 6 );
 
  mMinInclusiveCheckBox->setChecked( true );
  mMaxInclusiveCheckBox->setChecked( true );
 
  connect( mMinSpinBox, qOverload<double>( &QDoubleSpinBox::valueChanged ), this, &QgsAbstractFieldDomainWidget::changed );
  connect( mMaxSpinBox, qOverload<double>( &QDoubleSpinBox::valueChanged ), this, &QgsAbstractFieldDomainWidget::changed );
  connect( mMinInclusiveCheckBox, &QCheckBox::toggled, this, &QgsAbstractFieldDomainWidget::changed );
  connect( mMaxInclusiveCheckBox, &QCheckBox::toggled, this, &QgsAbstractFieldDomainWidget::changed );
}
 
void QgsRangeDomainWidget::setFieldDomain( const QgsFieldDomain *domain )
{
  const QgsRangeFieldDomain *rangeDomain = dynamic_cast<const QgsRangeFieldDomain *>( domain );
  if ( !rangeDomain )
    return;
 
  // currently only supported data type is double, but in future we *may* need to handle dates/etc here
  mMinSpinBox->setValue( rangeDomain->minimum().toDouble() );
  mMaxSpinBox->setValue( rangeDomain->maximum().toDouble() );
 
  mMinInclusiveCheckBox->setChecked( rangeDomain->minimumIsInclusive() );
  mMaxInclusiveCheckBox->setChecked( rangeDomain->maximumIsInclusive() );
}
 
void QgsFieldDomainWidget::setNameEditable( bool editable )
{
  mNameEdit->setEnabled( editable );
}
 
void QgsFieldDomainWidget::setPoliciesEditable( bool editable )
{
  mComboSplitPolicy->setEnabled( editable );
  mComboMergePolicy->setEnabled( editable );
}
 
QgsFieldDomain *QgsRangeDomainWidget::createFieldDomain( const QString &name, const QString &description, QMetaType::Type fieldType ) const
{
  return new QgsRangeFieldDomain( name, description, fieldType, mMinSpinBox->value(), mMinInclusiveCheckBox->isChecked(), mMaxSpinBox->value(), mMaxInclusiveCheckBox->isChecked() );
}
 
bool QgsRangeDomainWidget::isValid() const
{
  return mMinSpinBox->value() <= mMaxSpinBox->value();
}
 
//
// QgsGlobDomainWidget
//
 
QgsGlobDomainWidget::QgsGlobDomainWidget( QWidget *parent )
  : QgsAbstractFieldDomainWidget( parent )
{
  setupUi( this );
 
  connect( mEditGlob, &QLineEdit::textChanged, this, &QgsAbstractFieldDomainWidget::changed );
}
 
void QgsGlobDomainWidget::setFieldDomain( const QgsFieldDomain *domain )
{
  const QgsGlobFieldDomain *globDomain = dynamic_cast<const QgsGlobFieldDomain *>( domain );
  if ( !globDomain )
    return;
 
  mEditGlob->setText( globDomain->glob() );
}
 
void QgsFieldDomainDialog::setNameEditable( bool editable )
{
  mWidget->setNameEditable( editable );
}
 
void QgsFieldDomainDialog::setPoliciesEditable( bool editable )
{
  mWidget->setPoliciesEditable( editable );
}
 
QgsFieldDomain *QgsGlobDomainWidget::createFieldDomain( const QString &name, const QString &description, QMetaType::Type fieldType ) const
{
  return new QgsGlobFieldDomain( name, description, fieldType, mEditGlob->text() );
}
 
bool QgsGlobDomainWidget::isValid() const
{
  return !mEditGlob->text().trimmed().isEmpty();
}
 
//
// QgsCodedFieldDomainWidget
//
 
QgsCodedFieldDomainWidget::QgsCodedFieldDomainWidget( QWidget *parent )
  : QgsAbstractFieldDomainWidget( parent )
{
  setupUi( this );
 
  mModel = new QgsCodedValueTableModel( this );
  mValuesTable->setModel( mModel );
 
  connect( mButtonAddRow, &QToolButton::clicked, this, [this] {
    mModel->insertRow( mModel->rowCount() );
  } );
  connect( mButtonRemoveRow, &QToolButton::clicked, this, [this] {
    QItemSelectionModel *selectionModel = mValuesTable->selectionModel();
    const QModelIndexList selectedRows = selectionModel->selectedIndexes();
    if ( !selectedRows.empty() )
    {
      mModel->removeRow( selectedRows.first().row() );
    }
  } );
 
  connect( mModel, &QAbstractItemModel::dataChanged, this, &QgsAbstractFieldDomainWidget::changed );
  connect( mModel, &QAbstractItemModel::rowsInserted, this, &QgsAbstractFieldDomainWidget::changed );
  connect( mModel, &QAbstractItemModel::rowsRemoved, this, &QgsAbstractFieldDomainWidget::changed );
}
 
void QgsCodedFieldDomainWidget::setFieldDomain( const QgsFieldDomain *domain )
{
  const QgsCodedFieldDomain *codedDomain = dynamic_cast<const QgsCodedFieldDomain *>( domain );
  if ( !codedDomain )
    return;
 
  mModel->setValues( codedDomain->values() );
}
 
QgsFieldDomain *QgsCodedFieldDomainWidget::createFieldDomain( const QString &name, const QString &description, QMetaType::Type fieldType ) const
{
  return new QgsCodedFieldDomain( name, description, fieldType, mModel->values() );
}
 
bool QgsCodedFieldDomainWidget::isValid() const
{
  return true;
}
 
 
//
// QgsCodedValueTableModel
//
 
QgsCodedValueTableModel::QgsCodedValueTableModel( QObject *parent )
  : QAbstractTableModel( parent )
{
}
 
int QgsCodedValueTableModel::rowCount( const QModelIndex & ) const
{
  return mValues.count();
}
 
int QgsCodedValueTableModel::columnCount( const QModelIndex & ) const
{
  return 2;
}
 
QVariant QgsCodedValueTableModel::data( const QModelIndex &index, int role ) const
{
  if ( index.row() < 0 || index.row() >= mValues.count()
       || index.column() < 0 || index.column() >= 2 )
    return QVariant();
 
  const QgsCodedValue &value = mValues[index.row()];
  switch ( role )
  {
    case Qt::DisplayRole:
    case Qt::EditRole:
    case Qt::ToolTipRole:
    {
      switch ( index.column() )
      {
        case 0:
          return value.code();
        case 1:
          return value.value();
      }
      break;
    }
 
    default:
      break;
  }
  return QVariant();
}
 
bool QgsCodedValueTableModel::setData( const QModelIndex &index, const QVariant &value, int role )
{
  if ( index.row() < 0 || index.row() >= mValues.count()
       || index.column() < 0 || index.column() >= 2 )
    return false;
 
  const QgsCodedValue codedValue = mValues.at( index.row() );
  switch ( role )
  {
    case Qt::EditRole:
 
      switch ( index.column() )
      {
        case 0:
        {
          const QgsCodedValue newValue( value.toString(), codedValue.value() );
          mValues.replace( index.row(), newValue );
          emit dataChanged( index, index );
          return true;
        }
 
        case 1:
        {
          const QgsCodedValue newValue( codedValue.code(), value.toString() );
          mValues.replace( index.row(), newValue );
          emit dataChanged( index, index );
          return true;
        }
 
        default:
          break;
      }
 
      break;
  }
  return false;
}
 
Qt::ItemFlags QgsCodedValueTableModel::flags( const QModelIndex &index ) const
{
  if ( index.row() < 0
       || index.row() >= mValues.size()
       || index.column() < 0
       || index.column() >= columnCount() )
    return QAbstractTableModel::flags( index );
 
  return Qt::ItemFlag::ItemIsEnabled | Qt::ItemFlag::ItemIsSelectable | Qt::ItemFlag::ItemIsEditable;
}
 
QVariant QgsCodedValueTableModel::headerData( int section, Qt::Orientation orientation, int role ) const
{
  switch ( orientation )
  {
    case Qt::Horizontal:
      switch ( role )
      {
        case Qt::DisplayRole:
        case Qt::ToolTipRole:
        {
          switch ( section )
          {
            case 0:
              return tr( "Code" );
            case 1:
              return tr( "Value" );
            default:
              break;
          }
        }
        break;
        default:
          break;
      }
 
      break;
    case Qt::Vertical:
      break;
  }
  return QVariant();
}
 
bool QgsCodedValueTableModel::insertRows( int row, int count, const QModelIndex &parent )
{
  if ( parent.isValid() )
    return false;
 
  beginInsertRows( QModelIndex(), row, row + count - 1 );
  for ( int i = row; i < row + count; ++i )
  {
    mValues.insert( i, QgsCodedValue( QString(), QString() ) );
  }
  endInsertRows();
  return true;
}
 
bool QgsCodedValueTableModel::removeRows( int row, int count, const QModelIndex &parent )
{
  if ( row < 0 || row >= mValues.count() )
    return false;
 
  if ( parent.isValid() )
    return false;
 
  for ( int i = row + count - 1; i >= row; --i )
  {
    beginRemoveRows( parent, i, i );
    mValues.removeAt( i );
    endRemoveRows();
  }
  return true;
}
 
void QgsCodedValueTableModel::setValues( const QList<QgsCodedValue> &values )
{
  beginResetModel();
  mValues = values;
  endResetModel();
}
 
//
// QgsFieldDomainWidget
//
 
QgsFieldDomainWidget::QgsFieldDomainWidget( Qgis::FieldDomainType type, QWidget *parent )
  : QWidget( parent )
{
  setupUi( this );
 
  mComboSplitPolicy->addItem( tr( "Default Value" ), static_cast<int>( Qgis::FieldDomainSplitPolicy::DefaultValue ) );
  mComboSplitPolicy->addItem( tr( "Duplicate" ), static_cast<int>( Qgis::FieldDomainSplitPolicy::Duplicate ) );
  mComboSplitPolicy->addItem( tr( "Ratio of Geometries" ), static_cast<int>( Qgis::FieldDomainSplitPolicy::GeometryRatio ) );
 
  mComboMergePolicy->addItem( tr( "Default Value" ), static_cast<int>( Qgis::FieldDomainMergePolicy::DefaultValue ) );
  mComboMergePolicy->addItem( tr( "Sum" ), static_cast<int>( Qgis::FieldDomainMergePolicy::Sum ) );
  mComboMergePolicy->addItem( tr( "Geometry Weighted Average" ), static_cast<int>( Qgis::FieldDomainMergePolicy::GeometryWeighted ) );
 
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QMetaType::Type::Bool ), static_cast<int>( QMetaType::Type::Bool ) );
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QMetaType::Type::QString ), static_cast<int>( QMetaType::Type::QString ) );
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QMetaType::Type::Int ), static_cast<int>( QMetaType::Type::Int ) );
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QMetaType::Type::LongLong ), static_cast<int>( QMetaType::Type::LongLong ) );
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QMetaType::Type::Double ), static_cast<int>( QMetaType::Type::Double ) );
#if 0 // not supported by any formats yet...
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QVariant::Date ), static_cast< int >( QVariant::Date ) );
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QVariant::Time ), static_cast< int >( QVariant::Time ) );
  mFieldTypeCombo->addItem( QgsVariantUtils::typeToDisplayString( QVariant::DateTime ), static_cast< int >( QVariant::DateTime ) );
#endif
 
  switch ( type )
  {
    case Qgis::FieldDomainType::Coded:
      mDomainWidget = new QgsCodedFieldDomainWidget();
      mFieldTypeCombo->setCurrentIndex( mFieldTypeCombo->findData( static_cast<int>( QMetaType::Type::QString ) ) );
      break;
 
    case Qgis::FieldDomainType::Range:
      mDomainWidget = new QgsRangeDomainWidget();
      mFieldTypeCombo->setCurrentIndex( mFieldTypeCombo->findData( static_cast<int>( QMetaType::Type::Double ) ) );
      break;
 
    case Qgis::FieldDomainType::Glob:
      mDomainWidget = new QgsGlobDomainWidget();
      mFieldTypeCombo->setCurrentIndex( mFieldTypeCombo->findData( static_cast<int>( QMetaType::Type::QString ) ) );
      break;
  }
 
  mStackedWidget->addWidget( mDomainWidget );
  mStackedWidget->setCurrentWidget( mDomainWidget );
 
  connect( mNameEdit, &QLineEdit::textChanged, this, [this] {
    emit validityChanged( isValid() );
  } );
 
  connect( mDomainWidget, &QgsAbstractFieldDomainWidget::changed, this, [this] {
    emit validityChanged( isValid() );
  } );
}
 
void QgsFieldDomainWidget::setFieldDomain( const QgsFieldDomain *domain )
{
  if ( !domain )
    return;
 
  mNameEdit->setText( domain->name() );
  mDescriptionEdit->setText( domain->description() );
  mComboMergePolicy->setCurrentIndex( mComboMergePolicy->findData( static_cast<int>( domain->mergePolicy() ) ) );
  mComboSplitPolicy->setCurrentIndex( mComboSplitPolicy->findData( static_cast<int>( domain->splitPolicy() ) ) );
  mFieldTypeCombo->setCurrentIndex( mFieldTypeCombo->findData( static_cast<int>( domain->fieldType() ) ) );
 
  if ( mDomainWidget )
    mDomainWidget->setFieldDomain( domain );
}
 
QgsFieldDomain *QgsFieldDomainWidget::createFieldDomain() const
{
  if ( !mDomainWidget )
    return nullptr;
 
  std::unique_ptr<QgsFieldDomain> res( mDomainWidget->createFieldDomain( mNameEdit->text(), mDescriptionEdit->text(), static_cast<QMetaType::Type>( mFieldTypeCombo->currentData().toInt() ) ) );
 
  res->setMergePolicy( static_cast<Qgis::FieldDomainMergePolicy>( mComboMergePolicy->currentData().toInt() ) );
  res->setSplitPolicy( static_cast<Qgis::FieldDomainSplitPolicy>( mComboSplitPolicy->currentData().toInt() ) );
  return res.release();
}
 
bool QgsFieldDomainWidget::isValid() const
{
  if ( mNameEdit->text().trimmed().isEmpty() )
    return false;
 
  return mDomainWidget && mDomainWidget->isValid();
}
 
//
// QgsFieldDomainDialog
//
 
QgsFieldDomainDialog::QgsFieldDomainDialog( Qgis::FieldDomainType type, QWidget *parent, Qt::WindowFlags flags )
  : QDialog( parent, flags )
{
  setObjectName( u"QgsFieldDomainDialog"_s );
 
  QVBoxLayout *vLayout = new QVBoxLayout();
  mWidget = new QgsFieldDomainWidget( type );
  vLayout->addWidget( mWidget, 1 );
 
  mButtonBox = new QDialogButtonBox( QDialogButtonBox::StandardButton::Cancel | QDialogButtonBox::StandardButton::Help | QDialogButtonBox::StandardButton::Ok );
  connect( mButtonBox, &QDialogButtonBox::accepted, this, &QDialog::accept );
  connect( mButtonBox, &QDialogButtonBox::rejected, this, &QDialog::reject );
  connect( mButtonBox, &QDialogButtonBox::helpRequested, this, [] {
    QgsHelp::openHelp( u"managing_data_source/supported_data.rst#field-domain"_s );
  } );
  vLayout->addWidget( mButtonBox );
 
  setLayout( vLayout );
  connect( mWidget, &QgsFieldDomainWidget::validityChanged, this, &QgsFieldDomainDialog::validityChanged );
  validityChanged( mWidget->isValid() );
 
  QgsGui::enableAutoGeometryRestore( this );
}
 
void QgsFieldDomainDialog::setFieldDomain( const QgsFieldDomain *domain )
{
  mWidget->setFieldDomain( domain );
}
 
QgsFieldDomain *QgsFieldDomainDialog::createFieldDomain() const
{
  return mWidget->createFieldDomain();
}
 
void QgsFieldDomainDialog::accept()
{
  if ( !mWidget->isValid() )
    return;
 
  QDialog::accept();
}
 
void QgsFieldDomainDialog::validityChanged( bool isValid )
{
  mButtonBox->button( QDialogButtonBox::Ok )->setEnabled( isValid );
}