QList<QgsLabelFeature*> QgsVectorLayerDiagramProvider::labelFeatures( QgsRenderContext &context )
{
if ( !mSource )
{
// we have created the provider with "own feature loop" == false
// so it is assumed that prepare() has been already called followed by registerFeature() calls
return mFeatures;
}
QSet<QString> attributeNames;
if ( !prepare( context, attributeNames ) )
return QList<QgsLabelFeature*>();
QgsRectangle layerExtent = context.extent();
if ( mSettings.coordinateTransform().isValid() )
layerExtent = mSettings.coordinateTransform().transformBoundingBox( context.extent(), QgsCoordinateTransform::ReverseTransform );
QgsFeatureRequest request;
request.setFilterRect( layerExtent );
request.setSubsetOfAttributes( attributeNames, mFields );
QgsFeatureIterator fit = mSource->getFeatures( request );
QgsFeature fet;
while ( fit.nextFeature( fet ) )
{
registerFeature( fet, context );
}
return mFeatures;
}
void QgsDxfRuleBasedLabelProvider::registerDxfFeature( QgsFeature &feature, QgsRenderContext &context, const QString &dxfLayerName )
{
registerFeature( feature, context );
mDxfExport->registerDxfLayer( layerId(), feature.id(), dxfLayerName );
}
void QgsDxfLabelProvider::registerDxfFeature( QgsFeature& feature, const QgsRenderContext& context, const QString& dxfLayerName )
{
registerFeature( feature, context );
mDxfLayerNames[feature.id()] = dxfLayerName;
}
