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qgsinvertedpolygonrendererwidget.cpp
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qgsinvertedpolygonrendererwidget.cpp
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/***************************************************************************
qgsinvertedpolygonrendererwidget.cpp
---------------------
begin : April 2014
copyright : (C) 2014 Hugo Mercier / Oslandia
email : hugo dot mercier at oslandia 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 "qgsinvertedpolygonrendererwidget.h"
#include "qgsinvertedpolygonrenderer.h"
#include "qgsrendererv2registry.h"
#include "qgssymbolv2.h"
#include "qgslogger.h"
#include "qgsvectorlayer.h"
QgsRendererV2Widget* QgsInvertedPolygonRendererWidget::create( QgsVectorLayer* layer, QgsStyleV2* style, QgsFeatureRendererV2* renderer )
{
return new QgsInvertedPolygonRendererWidget( layer, style, renderer );
}
QgsInvertedPolygonRendererWidget::QgsInvertedPolygonRendererWidget( QgsVectorLayer* layer, QgsStyleV2* style, QgsFeatureRendererV2* renderer )
: QgsRendererV2Widget( layer, style )
{
if ( !layer )
{
return;
}
// the renderer only applies to polygon vector layers
if ( layer->wkbType() != QGis::WKBPolygon &&
layer->wkbType() != QGis::WKBPolygon25D &&
layer->wkbType() != QGis::WKBMultiPolygon &&
layer->wkbType() != QGis::WKBMultiPolygon25D )
{
//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 = QgsRendererV2Registry::instance()->renderersList( QgsRendererV2AbstractMetadata::PolygonLayer );
QStringList::const_iterator it = rendererList.constBegin();
int idx = 0;
mRendererComboBox->blockSignals( true );
for ( ; it != rendererList.constEnd(); ++it, ++idx )
{
if ( *it != "invertedPolygonRenderer" ) //< an inverted renderer cannot contain another inverted renderer
{
QgsRendererV2AbstractMetadata* m = QgsRendererV2Registry::instance()->rendererMetadata( *it );
mRendererComboBox->addItem( m->icon(), m->visibleName(), /* data */ *it );
const QgsFeatureRendererV2* 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 );
}
}
QgsFeatureRendererV2* QgsInvertedPolygonRendererWidget::renderer()
{
if ( mRenderer && mEmbeddedRendererWidget )
{
QgsFeatureRendererV2* embeddedRenderer = mEmbeddedRendererWidget->renderer();
if ( embeddedRenderer )
{
mRenderer->setEmbeddedRenderer( embeddedRenderer->clone() );
}
}
return mRenderer.data();
}
void QgsInvertedPolygonRendererWidget::setMapCanvas( QgsMapCanvas* canvas )
{
QgsRendererV2Widget::setMapCanvas( canvas );
if ( mEmbeddedRendererWidget )
mEmbeddedRendererWidget->setMapCanvas( canvas );
}
void QgsInvertedPolygonRendererWidget::on_mRendererComboBox_currentIndexChanged( int index )
{
QString rendererId = mRendererComboBox->itemData( index ).toString();
QgsRendererV2AbstractMetadata* m = QgsRendererV2Registry::instance()->rendererMetadata( rendererId );
if ( m )
{
mEmbeddedRendererWidget.reset( m->createRendererWidget( mLayer, mStyle, const_cast<QgsFeatureRendererV2*>( mRenderer->embeddedRenderer() )->clone() ) );
connect( mEmbeddedRendererWidget.data(), SIGNAL( widgetChanged() ), this, SIGNAL( widgetChanged() ) );
mEmbeddedRendererWidget->setMapCanvas( mMapCanvas );
if ( layout()->count() > 2 )
{
// remove the current renderer widget
layout()->takeAt( 2 );
}
layout()->addWidget( mEmbeddedRendererWidget.data() );
}
}
void QgsInvertedPolygonRendererWidget::on_mMergePolygonsCheckBox_stateChanged( int state )
{
mRenderer->setPreprocessingEnabled( state == Qt::Checked );
}