QgsInvertedPolygonRendererWidget::QgsInvertedPolygonRendererWidget( QgsVectorLayer* layer, QgsStyle* style, QgsFeatureRenderer* renderer )
: QgsRendererWidget( layer, style )
{
if ( !layer )
{
return;
}
QgsWkbTypes::Type type = QgsWkbTypes::singleType( QgsWkbTypes::flatType( layer->wkbType() ) );
// the renderer only applies to polygon vector layers
if ( type != QgsWkbTypes::Polygon && type != QgsWkbTypes::CurvePolygon )
{
//setup blank dialog
mRenderer.reset( nullptr );
QGridLayout* layout = new QGridLayout( this );
QLabel* label = new QLabel( tr( "The inverted polygon renderer only applies to polygon and multipolygon layers. \n"
"'%1' is not a polygon layer and then cannot be displayed" )
.arg( layer->name() ), this );
this->setLayout( layout );
layout->addWidget( label );
return;
}
setupUi( this );
// try to recognize the previous renderer
// (null renderer means "no previous renderer")
if ( renderer )
{
mRenderer.reset( QgsInvertedPolygonRenderer::convertFromRenderer( renderer ) );
}
if ( ! mRenderer )
{
mRenderer.reset( new QgsInvertedPolygonRenderer() );
}
mMergePolygonsCheckBox->blockSignals( true );
mMergePolygonsCheckBox->setCheckState( mRenderer->preprocessingEnabled() ? Qt::Checked : Qt::Unchecked );
mMergePolygonsCheckBox->blockSignals( false );
int currentEmbeddedIdx = 0;
//insert possible renderer types
QStringList rendererList = QgsApplication::rendererRegistry()->renderersList( QgsRendererAbstractMetadata::PolygonLayer );
QStringList::const_iterator it = rendererList.constBegin();
int idx = 0;
mRendererComboBox->blockSignals( true );
for ( ; it != rendererList.constEnd(); ++it, ++idx )
{
if ( *it != QLatin1String( "invertedPolygonRenderer" ) ) //< an inverted renderer cannot contain another inverted renderer
{
QgsRendererAbstractMetadata* m = QgsApplication::rendererRegistry()->rendererMetadata( *it );
mRendererComboBox->addItem( m->icon(), m->visibleName(), /* data */ *it );
const QgsFeatureRenderer* embeddedRenderer = mRenderer->embeddedRenderer();
if ( embeddedRenderer && embeddedRenderer->type() == m->name() )
{
// store the combo box index of the current renderer
currentEmbeddedIdx = idx;
}
}
}
mRendererComboBox->blockSignals( false );
int oldIdx = mRendererComboBox->currentIndex();
mRendererComboBox->setCurrentIndex( currentEmbeddedIdx );
if ( oldIdx == currentEmbeddedIdx )
{
// force update
on_mRendererComboBox_currentIndexChanged( currentEmbeddedIdx );
}
}
