qgssymbollevelsdialog.cpp

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/***************************************************************************
    qgssymbollevelsdialog.cpp
    ---------------------
    begin                : November 2009
    copyright            : (C) 2009 by Martin Dobias
    email                : wonder dot sk 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 "qgssymbollevelsdialog.h"
 
#include "qgssymbollayerutils.h"
#include "qgssymbollayer.h"
#include "qgssymbol.h"
#include "qgssettings.h"
#include "qgsguiutils.h"
 
#include <QTableWidgetItem>
#include <QItemDelegate>
#include <QSpinBox>
#include <QDialogButtonBox>
 
 
 
QgsSymbolLevelsWidget::QgsSymbolLevelsWidget( QgsFeatureRenderer *renderer, bool usingSymbolLevels, QWidget *parent )
  : QgsPanelWidget( parent )
  , mRenderer( renderer )
  , mForceOrderingEnabled( false )
{
  setupUi( this );
 
  tableLevels->setItemDelegate( new SpinBoxDelegate( this ) );
 
  chkEnable->setChecked( usingSymbolLevels );
 
  connect( chkEnable, &QAbstractButton::clicked, this, &QgsSymbolLevelsWidget::updateUi );
 
  if ( mRenderer )
  {
    // only consider entries with symbols
    const auto constLegendSymbolItems = mRenderer->legendSymbolItems();
    for ( const QgsLegendSymbolItem &item : constLegendSymbolItems )
    {
      if ( item.symbol() )
        mLegendSymbols << item;
    }
  }
 
  const int iconSize = QgsGuiUtils::scaleIconSize( 16 );
  int maxLayers = 0;
  tableLevels->setRowCount( mLegendSymbols.count() );
  for ( int i = 0; i < mLegendSymbols.count(); i++ )
  {
    QgsSymbol *sym = mLegendSymbols.at( i ).symbol();
 
    // set icons for the rows
    QIcon icon = QgsSymbolLayerUtils::symbolPreviewIcon( sym, QSize( iconSize, iconSize ) );
    tableLevels->setVerticalHeaderItem( i, new QTableWidgetItem( icon, QString() ) );
 
    // find out max. number of layers per symbol
    int layers = sym->symbolLayerCount();
    if ( layers > maxLayers )
      maxLayers = layers;
  }
 
  tableLevels->setColumnCount( maxLayers + 1 );
  tableLevels->setHorizontalHeaderItem( 0, new QTableWidgetItem( QString() ) );
  for ( int i = 0; i < maxLayers; i++ )
  {
    QString name = tr( "Layer %1" ).arg( i );
    tableLevels->setHorizontalHeaderItem( i + 1, new QTableWidgetItem( name ) );
  }
 
  mMaxLayers = maxLayers;
 
  updateUi();
 
  if ( !usingSymbolLevels )
    setDefaultLevels();
 
  populateTable();
 
  connect( tableLevels, &QTableWidget::cellChanged, this, &QgsSymbolLevelsWidget::renderingPassChanged );
}
 
void QgsSymbolLevelsWidget::populateTable()
{
  const int iconSize = QgsGuiUtils::scaleIconSize( 16 );
  for ( int row = 0; row < mLegendSymbols.count(); row++ )
  {
    QgsSymbol *sym = mLegendSymbols.at( row ).symbol();
    QString label = mLegendSymbols.at( row ).label();
    QTableWidgetItem *itemLabel = new QTableWidgetItem( label );
    itemLabel->setFlags( itemLabel->flags() ^ Qt::ItemIsEditable );
    tableLevels->setItem( row, 0, itemLabel );
    for ( int layer = 0; layer < mMaxLayers; layer++ )
    {
      QTableWidgetItem *item = nullptr;
      if ( layer >= sym->symbolLayerCount() )
      {
        item = new QTableWidgetItem();
        item->setFlags( Qt::ItemFlags() );
      }
      else
      {
        QgsSymbolLayer *sl = sym->symbolLayer( layer );
        QIcon icon = QgsSymbolLayerUtils::symbolLayerPreviewIcon( sl, QgsUnitTypes::RenderMillimeters, QSize( iconSize, iconSize ) );
        item = new QTableWidgetItem( icon, QString::number( sl->renderingPass() ) );
      }
      tableLevels->setItem( row, layer + 1, item );
      tableLevels->resizeColumnToContents( 0 );
    }
  }
 
}
 
void QgsSymbolLevelsWidget::updateUi()
{
  tableLevels->setEnabled( chkEnable->isChecked() );
  emit widgetChanged();
}
 
void QgsSymbolLevelsWidget::apply()
{
  for ( const QgsLegendSymbolItem &legendSymbol : qgis::as_const( mLegendSymbols ) )
  {
    QgsSymbol *sym = legendSymbol.symbol();
    for ( int layer = 0; layer < sym->symbolLayerCount(); layer++ )
    {
      mRenderer->setLegendSymbolItem( legendSymbol.ruleKey(), sym->clone() );
    }
  }
 
  mRenderer->setUsingSymbolLevels( usingLevels() );
}
 
void QgsSymbolLevelsWidget::setDefaultLevels()
{
  for ( int i = 0; i < mLegendSymbols.count(); i++ )
  {
    QgsSymbol *sym = mLegendSymbols.at( i ).symbol();
    for ( int layer = 0; layer < sym->symbolLayerCount(); layer++ )
    {
      sym->symbolLayer( layer )->setRenderingPass( layer );
    }
  }
}
 
bool QgsSymbolLevelsWidget::usingLevels() const
{
  return chkEnable->isChecked();
}
 
void QgsSymbolLevelsWidget::renderingPassChanged( int row, int column )
{
  if ( row < 0 || row >= mLegendSymbols.count() )
    return;
  QgsSymbol *sym = mLegendSymbols.at( row ).symbol();
  if ( column < 0 || column > sym->symbolLayerCount() )
    return;
  sym->symbolLayer( column - 1 )->setRenderingPass( tableLevels->item( row, column )->text().toInt() );
 
  emit widgetChanged();
}
 
void QgsSymbolLevelsWidget::setForceOrderingEnabled( bool enabled )
{
  mForceOrderingEnabled = enabled;
  if ( enabled )
  {
    chkEnable->setChecked( true );
    chkEnable->hide();
  }
  else
    chkEnable->show();
}
 
QgsSymbolLevelsDialog::QgsSymbolLevelsDialog( QgsFeatureRenderer *renderer, bool usingSymbolLevels, QWidget *parent )
  : QDialog( parent )
{
  QVBoxLayout *vLayout = new QVBoxLayout();
  mWidget = new QgsSymbolLevelsWidget( renderer, usingSymbolLevels );
  vLayout->addWidget( mWidget );
  QDialogButtonBox *bbox = new QDialogButtonBox( QDialogButtonBox::Cancel | QDialogButtonBox::Help | QDialogButtonBox::Ok, Qt::Horizontal );
  connect( bbox, &QDialogButtonBox::accepted, mWidget, &QgsSymbolLevelsWidget::apply );
  connect( bbox, &QDialogButtonBox::accepted, this, &QgsSymbolLevelsDialog::accept );
  connect( bbox, &QDialogButtonBox::rejected, this, &QgsSymbolLevelsDialog::reject );
  connect( bbox, &QDialogButtonBox::helpRequested, this, &QgsSymbolLevelsDialog::showHelp );
  vLayout->addWidget( bbox );
  setLayout( vLayout );
  setWindowTitle( tr( "Symbol Levels" ) );
}
 
void QgsSymbolLevelsDialog::setForceOrderingEnabled( bool enabled )
{
  mWidget->setForceOrderingEnabled( enabled );
}
 
void QgsSymbolLevelsDialog::showHelp()
{
  QgsHelp::openHelp( QStringLiteral( "working_with_vector/vector_properties.html#symbols-levels" ) );
}
 
 
QWidget *SpinBoxDelegate::createEditor( QWidget *parent, const QStyleOptionViewItem &, const QModelIndex & ) const
{
  QSpinBox *editor = new QSpinBox( parent );
  editor->setMinimum( 0 );
  editor->setMaximum( 999 );
  return editor;
}
 
void SpinBoxDelegate::setEditorData( QWidget *editor, const QModelIndex &index ) const
{
  int value = index.model()->data( index, Qt::EditRole ).toInt();
  QSpinBox *spinBox = static_cast<QSpinBox *>( editor );
  spinBox->setValue( value );
}
 
void SpinBoxDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
{
  QSpinBox *spinBox = static_cast<QSpinBox *>( editor );
  spinBox->interpretText();
  int value = spinBox->value();
 
  model->setData( index, value, Qt::EditRole );
}
 
void SpinBoxDelegate::updateEditorGeometry( QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex & ) const
{
  editor->setGeometry( option.rect );
}