void QgsVectorLayerRenderer::drawRendererV2( QgsFeatureIterator& fit )
{
QgsFeature fet;
while ( fit.nextFeature( fet ) )
{
try
{
if ( !fet.geometry() )
continue; // skip features without geometry
if ( mContext.renderingStopped() )
{
QgsDebugMsg( QString( "Drawing of vector layer %1 cancelled." ).arg( layerID() ) );
break;
}
bool sel = mContext.showSelection() && mSelectedFeatureIds.contains( fet.id() );
bool drawMarker = ( mDrawVertexMarkers && mContext.drawEditingInformation() && ( !mVertexMarkerOnlyForSelection || sel ) );
// render feature
bool rendered = mRendererV2->renderFeature( fet, mContext, -1, sel, drawMarker );
if ( mCache )
{
// Cache this for the use of (e.g.) modifying the feature's uncommitted geometry.
mCache->cacheGeometry( fet.id(), *fet.geometry() );
}
// labeling - register feature
Q_UNUSED( rendered );
if ( rendered && mContext.labelingEngine() )
{
if ( mLabeling )
{
mContext.labelingEngine()->registerFeature( mLayerID, fet, mContext );
}
if ( mDiagrams )
{
mContext.labelingEngine()->registerDiagramFeature( mLayerID, fet, mContext );
}
}
}
catch ( const QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( QString( "Failed to transform a point while drawing a feature with ID '%1'. Ignoring this feature. %2" )
.arg( fet.id() ).arg( cse.what() ) );
}
}
stopRendererV2( NULL );
}
void QgsVectorLayerRenderer::drawRendererV2( QgsFeatureIterator& fit )
{
QgsExpressionContextScope* symbolScope = QgsExpressionContextUtils::updateSymbolScope( nullptr );
mContext.expressionContext().appendScope( symbolScope );
QgsFeature fet;
while ( fit.nextFeature( fet ) )
{
try
{
if ( !fet.constGeometry() )
continue; // skip features without geometry
if ( mContext.renderingStopped() )
{
QgsDebugMsg( QString( "Drawing of vector layer %1 cancelled." ).arg( layerID() ) );
break;
}
mContext.expressionContext().setFeature( fet );
bool sel = mContext.showSelection() && mSelectedFeatureIds.contains( fet.id() );
bool drawMarker = ( mDrawVertexMarkers && mContext.drawEditingInformation() && ( !mVertexMarkerOnlyForSelection || sel ) );
if ( mCache )
{
// Cache this for the use of (e.g.) modifying the feature's uncommitted geometry.
mCache->cacheGeometry( fet.id(), *fet.constGeometry() );
}
// render feature
bool rendered = mRendererV2->renderFeature( fet, mContext, -1, sel, drawMarker );
// labeling - register feature
if ( rendered )
{
if ( mContext.labelingEngine() )
{
if ( mLabeling )
{
mContext.labelingEngine()->registerFeature( mLayerID, fet, mContext );
}
if ( mDiagrams )
{
mContext.labelingEngine()->registerDiagramFeature( mLayerID, fet, mContext );
}
}
// new labeling engine
if ( mContext.labelingEngineV2() )
{
QScopedPointer<QgsGeometry> obstacleGeometry;
QgsSymbolV2List symbols = mRendererV2->originalSymbolsForFeature( fet, mContext );
if ( !symbols.isEmpty() && fet.constGeometry()->type() == QGis::Point )
{
obstacleGeometry.reset( QgsVectorLayerLabelProvider::getPointObstacleGeometry( fet, mContext, symbols ) );
}
if ( !symbols.isEmpty() )
{
QgsExpressionContextUtils::updateSymbolScope( symbols.at( 0 ), symbolScope );
}
if ( mLabelProvider )
{
mLabelProvider->registerFeature( fet, mContext, obstacleGeometry.data() );
}
if ( mDiagramProvider )
{
mDiagramProvider->registerFeature( fet, mContext, obstacleGeometry.data() );
}
}
}
}
catch ( const QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( QString( "Failed to transform a point while drawing a feature with ID '%1'. Ignoring this feature. %2" )
.arg( fet.id() ).arg( cse.what() ) );
}
}
mContext.expressionContext().popScope();
stopRendererV2( nullptr );
}
void QgsComposerLayerItem::setDefaultStyle( double scaleDenominator, const QString& rule )
{
// set default style according to number of symbols
QgsVectorLayer* vLayer = qobject_cast<QgsVectorLayer*>( QgsMapLayerRegistry::instance()->mapLayer( layerID() ) );
if ( vLayer )
{
QgsFeatureRendererV2* renderer = vLayer->rendererV2();
if ( renderer )
{
QPair<QString, QgsSymbolV2*> symbolItem = renderer->legendSymbolItems( scaleDenominator, rule ).value( 0 );
if ( renderer->legendSymbolItems( scaleDenominator, rule ).size() > 1 || !symbolItem.first.isEmpty() )
{
setStyle( QgsComposerLegendStyle::Subgroup );
}
else
{
// Hide title by default for single symbol
setStyle( QgsComposerLegendStyle::Hidden );
}
}
}
}
