void QgsMarkerSymbolV2::setDataDefinedSize( const QgsDataDefined &dd ) { const double symbolSize = size(); for ( QgsSymbolLayerV2List::iterator it = mLayers.begin(); it != mLayers.end(); ++it ) { QgsMarkerSymbolLayerV2* layer = static_cast<QgsMarkerSymbolLayerV2 *>( *it ); if ( dd.hasDefaultValues() ) { layer->removeDataDefinedProperty( "size" ); layer->removeDataDefinedProperty( "offset" ); } else { if ( symbolSize == 0 || qgsDoubleNear( layer->size(), symbolSize ) ) { layer->setDataDefinedProperty( "size", new QgsDataDefined( dd ) ); } else { layer->setDataDefinedProperty( "size", scaleWholeSymbol( layer->size() / symbolSize, dd ) ); } if ( layer->offset().x() || layer->offset().y() ) { layer->setDataDefinedProperty( "offset", scaleWholeSymbol( layer->offset().x() / symbolSize, layer->offset().y() / symbolSize, dd ) ); } } } }
void QgsMarkerSymbolV2::setSize( double s ) { double origSize = size(); for ( QgsSymbolLayerV2List::iterator it = mLayers.begin(); it != mLayers.end(); ++it ) { QgsMarkerSymbolLayerV2* layer = static_cast<QgsMarkerSymbolLayerV2*>( *it ); if ( layer->size() == origSize ) layer->setSize( s ); else if ( origSize != 0 ) { // proportionally scale size layer->setSize( layer->size() * s / origSize ); } // also scale offset to maintain relative position if ( origSize != 0 && ( layer->offset().x() || layer->offset().y() ) ) layer->setOffset( QPointF( layer->offset().x() * s / origSize, layer->offset().y() * s / origSize ) ); } }