qgsprocessingdxflayerswidgetwrapper.cpp

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/***************************************************************************
  qgsprocessingdxflayerswidgetwrapper.cpp
  ---------------------
  Date                 : September 2020
  Copyright            : (C) 2020 by Alexander Bruy
  Email                : alexander dot bruy 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 "qgsprocessingdxflayerswidgetwrapper.h"
#include "moc_qgsprocessingdxflayerswidgetwrapper.cpp"
 
#include <QBoxLayout>
#include <QLineEdit>
#include <QMessageBox>
#include <QPushButton>
#include <QStandardItemModel>
#include <QToolButton>
 
#include "qgspanelwidget.h"
#include "qgsprocessingparameters.h"
#include "qgsprocessingoutputs.h"
#include "qgsprocessingparameterdxflayers.h"
 
 
//
// QgsProcessingDxfLayerDetailsWidget
//
 
QgsProcessingDxfLayerDetailsWidget::QgsProcessingDxfLayerDetailsWidget( const QVariant &value, QgsProject *project )
{
  setupUi( this );
 
  mFieldsComboBox->setAllowEmptyFieldName( true );
 
  mContext.setProject( project );
 
  const QgsDxfExport::DxfLayer layer = QgsProcessingParameterDxfLayers::variantMapAsLayer( value.toMap(), mContext );
  mLayer = layer.layer();
 
  if ( !mLayer )
    return;
 
  mFieldsComboBox->setLayer( mLayer );
 
  if ( mLayer->fields().exists( layer.layerOutputAttributeIndex() ) )
    mFieldsComboBox->setField( mLayer->fields().at( layer.layerOutputAttributeIndex() ).name() );
 
  mOverriddenName->setText( layer.overriddenName() );
 
  if ( mLayer->geometryType() == Qgis::GeometryType::Point )
  {
    // Data defined blocks are only available for point layers
    mGroupBoxBlocks->setVisible( true );
    mGroupBoxBlocks->setChecked( layer.buildDataDefinedBlocks() );
    mSpinBoxBlocks->setValue( layer.dataDefinedBlocksMaximumNumberOfClasses() );
  }
  else
  {
    mGroupBoxBlocks->setVisible( false );
  }
 
  connect( mFieldsComboBox, &QgsFieldComboBox::fieldChanged, this, &QgsPanelWidget::widgetChanged );
  connect( mOverriddenName, &QLineEdit::textChanged, this, &QgsPanelWidget::widgetChanged );
  connect( mGroupBoxBlocks, &QGroupBox::toggled, this, &QgsPanelWidget::widgetChanged );
  connect( mSpinBoxBlocks, &QSpinBox::textChanged, this, &QgsPanelWidget::widgetChanged );
}
 
QVariant QgsProcessingDxfLayerDetailsWidget::value() const
{
  const int index = mLayer->fields().lookupField( mFieldsComboBox->currentField() );
  const QgsDxfExport::DxfLayer layer( mLayer, index, mGroupBoxBlocks->isChecked(), mSpinBoxBlocks->value(), mOverriddenName->text().trimmed() );
  return QgsProcessingParameterDxfLayers::layerAsVariantMap( layer );
}
 
 
//
// QgsProcessingDxfLayersPanelWidget
//
 
QgsProcessingDxfLayersPanelWidget::QgsProcessingDxfLayersPanelWidget(
  const QVariant &value,
  QgsProject *project,
  QWidget *parent
)
  : QgsProcessingMultipleSelectionPanelWidget( QVariantList(), QVariantList(), parent )
  , mProject( project )
{
  connect( listView(), &QListView::doubleClicked, this, &QgsProcessingDxfLayersPanelWidget::configureLayer );
 
  QPushButton *configureLayerButton = new QPushButton( tr( "Configure Layer…" ) );
  connect( configureLayerButton, &QPushButton::clicked, this, &QgsProcessingDxfLayersPanelWidget::configureLayer );
  buttonBox()->addButton( configureLayerButton, QDialogButtonBox::ActionRole );
 
  // populate the list: first layers already selected, then layers from project not yet selected
  mContext.setProject( project );
 
  QSet<const QgsVectorLayer *> seenVectorLayers;
  const QVariantList valueList = value.toList();
  for ( const QVariant &v : valueList )
  {
    const QgsDxfExport::DxfLayer layer = QgsProcessingParameterDxfLayers::variantMapAsLayer( v.toMap(), mContext );
    if ( !layer.layer() )
      continue; // skip any invalid layers
 
    addOption( v, titleForLayer( layer ), true );
    seenVectorLayers.insert( layer.layer() );
  }
 
  const QList<QgsVectorLayer *> options = QgsProcessingUtils::compatibleVectorLayers( project, QList<int>() << static_cast<int>( Qgis::ProcessingSourceType::VectorAnyGeometry ) );
  for ( const QgsVectorLayer *layer : options )
  {
    if ( seenVectorLayers.contains( layer ) )
      continue;
 
    QVariantMap vm;
    vm["layer"] = layer->id();
    vm["attributeIndex"] = -1;
    vm["overriddenLayerName"] = QString();
    vm["buildDataDefinedBlocks"] = DEFAULT_DXF_DATA_DEFINED_BLOCKS;
    vm["dataDefinedBlocksMaximumNumberOfClasses"] = -1;
 
    const QString title = layer->name();
    addOption( vm, title, false );
  }
}
 
void QgsProcessingDxfLayersPanelWidget::configureLayer()
{
  const QModelIndexList selection = listView()->selectionModel()->selectedIndexes();
  if ( selection.size() != 1 )
  {
    QMessageBox::warning( this, tr( "Configure Layer" ), tr( "Please select a single layer." ) );
    return;
  }
 
  QStandardItem *item = mModel->itemFromIndex( selection[0] );
  const QVariant value = item->data( Qt::UserRole );
 
  QgsPanelWidget *panel = QgsPanelWidget::findParentPanel( this );
  if ( panel && panel->dockMode() )
  {
    QgsProcessingDxfLayerDetailsWidget *widget = new QgsProcessingDxfLayerDetailsWidget( value, mProject );
    widget->setPanelTitle( tr( "Configure Layer" ) );
    widget->buttonBox()->hide();
 
    connect( widget, &QgsProcessingDxfLayerDetailsWidget::widgetChanged, this, [this, item, widget]() {
      setItemValue( item, widget->value() );
    } );
    panel->openPanel( widget );
  }
  else
  {
    QDialog dlg;
    dlg.setWindowTitle( tr( "Configure Layer" ) );
    QVBoxLayout *vLayout = new QVBoxLayout();
    QgsProcessingDxfLayerDetailsWidget *widget = new QgsProcessingDxfLayerDetailsWidget( value, mProject );
    vLayout->addWidget( widget );
    connect( widget->buttonBox(), &QDialogButtonBox::accepted, &dlg, &QDialog::accept );
    connect( widget->buttonBox(), &QDialogButtonBox::rejected, &dlg, &QDialog::reject );
    dlg.setLayout( vLayout );
    if ( dlg.exec() )
    {
      setItemValue( item, widget->value() );
    }
  }
}
 
void QgsProcessingDxfLayersPanelWidget::setItemValue( QStandardItem *item, const QVariant &value )
{
  mContext.setProject( mProject );
 
  const QgsDxfExport::DxfLayer layer = QgsProcessingParameterDxfLayers::variantMapAsLayer( value.toMap(), mContext );
 
  item->setText( titleForLayer( layer ) );
  item->setData( value, Qt::UserRole );
}
 
QString QgsProcessingDxfLayersPanelWidget::titleForLayer( const QgsDxfExport::DxfLayer &layer )
{
  QString title = layer.layer()->name();
 
  // if both options are set, the split attribute takes precedence,
  // so hide overridden message to give users a hint on the result.
  if ( layer.layerOutputAttributeIndex() != -1 )
  {
    title += tr( " [split attribute: %1]" ).arg( layer.splitLayerAttribute() );
  }
  else
  {
    if ( !layer.overriddenName().isEmpty() )
    {
      title += tr( " [overridden name: %1]" ).arg( layer.overriddenName() );
    }
  }
 
  return title;
}
 
 
//
// QgsProcessingDxfLayersWidget
//
 
QgsProcessingDxfLayersWidget::QgsProcessingDxfLayersWidget( QWidget *parent )
  : QWidget( parent )
{
  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 );
 
  updateSummaryText();
 
  connect( mToolButton, &QToolButton::clicked, this, &QgsProcessingDxfLayersWidget::showDialog );
}
 
void QgsProcessingDxfLayersWidget::setValue( const QVariant &value )
{
  if ( value.isValid() )
    mValue = value.userType() == QMetaType::Type::QVariantList ? value.toList() : QVariantList() << value;
  else
    mValue.clear();
 
  updateSummaryText();
  emit changed();
}
 
void QgsProcessingDxfLayersWidget::setProject( QgsProject *project )
{
  mProject = project;
}
 
void QgsProcessingDxfLayersWidget::showDialog()
{
  QgsPanelWidget *panel = QgsPanelWidget::findParentPanel( this );
  if ( panel && panel->dockMode() )
  {
    QgsProcessingDxfLayersPanelWidget *widget = new QgsProcessingDxfLayersPanelWidget( mValue, mProject );
    widget->setPanelTitle( tr( "Input layers" ) );
    connect( widget, &QgsProcessingMultipleSelectionPanelWidget::selectionChanged, this, [this, widget]() {
      setValue( widget->selectedOptions() );
    } );
    connect( widget, &QgsProcessingMultipleSelectionPanelWidget::acceptClicked, widget, &QgsPanelWidget::acceptPanel );
    panel->openPanel( widget );
  }
  else
  {
    QDialog dlg;
    dlg.setWindowTitle( tr( "Input layers" ) );
    QVBoxLayout *vLayout = new QVBoxLayout();
    QgsProcessingDxfLayersPanelWidget *widget = new QgsProcessingDxfLayersPanelWidget( mValue, mProject );
    vLayout->addWidget( widget );
    widget->buttonBox()->addButton( QDialogButtonBox::Cancel );
    connect( widget->buttonBox(), &QDialogButtonBox::accepted, &dlg, &QDialog::accept );
    connect( widget->buttonBox(), &QDialogButtonBox::rejected, &dlg, &QDialog::reject );
    dlg.setLayout( vLayout );
    if ( dlg.exec() )
    {
      setValue( widget->selectedOptions() );
    }
  }
}
 
void QgsProcessingDxfLayersWidget::updateSummaryText()
{
  mLineEdit->setText( tr( "%n vector layer(s) selected", nullptr, mValue.count() ) );
}
 
 
//
// QgsProcessingDxfLayersWidgetWrapper
//
 
QgsProcessingDxfLayersWidgetWrapper::QgsProcessingDxfLayersWidgetWrapper( const QgsProcessingParameterDefinition *parameter, Qgis::ProcessingMode type, QWidget *parent )
  : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
{
}
 
QString QgsProcessingDxfLayersWidgetWrapper::parameterType() const
{
  return QgsProcessingParameterDxfLayers::typeName();
}
 
QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingDxfLayersWidgetWrapper::createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, Qgis::ProcessingMode type )
{
  return new QgsProcessingDxfLayersWidgetWrapper( parameter, type );
}
 
QWidget *QgsProcessingDxfLayersWidgetWrapper::createWidget()
{
  mPanel = new QgsProcessingDxfLayersWidget( nullptr );
  mPanel->setProject( widgetContext().project() );
  connect( mPanel, &QgsProcessingDxfLayersWidget::changed, this, [this] {
    emit widgetValueHasChanged( this );
  } );
  return mPanel;
}
 
void QgsProcessingDxfLayersWidgetWrapper::setWidgetContext( const QgsProcessingParameterWidgetContext &context )
{
  QgsAbstractProcessingParameterWidgetWrapper::setWidgetContext( context );
  if ( mPanel )
  {
    mPanel->setProject( context.project() );
  }
}
 
void QgsProcessingDxfLayersWidgetWrapper::setWidgetValue( const QVariant &value, QgsProcessingContext &context )
{
  Q_UNUSED( context )
  if ( mPanel )
  {
    mPanel->setValue( value );
  }
}
 
QVariant QgsProcessingDxfLayersWidgetWrapper::widgetValue() const
{
  return mPanel ? mPanel->value() : QVariant();
}