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 ) );
}
}