QList< QPair< QgsSymbolLayerV2*, QgsSymbolV2* > > QgsDxfExport::symbolLayers()
{
QList< QPair< QgsSymbolLayerV2*, QgsSymbolV2* > > symbolLayers;
QList< QgsMapLayer* >::iterator lIt = mLayers.begin();
for ( ; lIt != mLayers.end(); ++lIt )
{
//cast to vector layer
QgsVectorLayer* vl = qobject_cast<QgsVectorLayer*>( *lIt );
if ( !vl )
{
continue;
}
//get rendererv2
QgsFeatureRendererV2* r = vl->rendererV2();
if ( !r )
{
continue;
}
//get all symbols
QgsSymbolV2List symbols = r->symbols();
QgsSymbolV2List::iterator symbolIt = symbols.begin();
for ( ; symbolIt != symbols.end(); ++symbolIt )
{
int maxSymbolLayers = ( *symbolIt )->symbolLayerCount();
if ( mSymbologyExport != SymbolLayerSymbology )
{
maxSymbolLayers = 1;
}
for ( int i = 0; i < maxSymbolLayers; ++i )
{
symbolLayers.append( qMakePair(( *symbolIt )->symbolLayer( i ), *symbolIt ) ) ;
}
}
}
return symbolLayers;
}
void QgsDxfExport::writeEntitiesSymbolLevels( QgsVectorLayer* layer )
{
if ( !layer )
{
return;
}
QgsFeatureRendererV2* renderer = layer->rendererV2();
if ( !renderer )
{
//return error
}
QHash< QgsSymbolV2*, QList<QgsFeature> > features;
QgsRenderContext ctx = renderContext();
QgsSymbolV2RenderContext sctx( ctx, QgsSymbolV2::MM , 1.0, false, 0, 0 );
renderer->startRender( ctx, layer->pendingFields() );
//get iterator
QgsFeatureRequest req;
if ( layer->wkbType() == QGis::WKBNoGeometry )
{
req.setFlags( QgsFeatureRequest::NoGeometry );
}
req.setSubsetOfAttributes( QStringList( renderer->usedAttributes() ), layer->pendingFields() );
if ( !mExtent.isEmpty() )
{
req.setFilterRect( mExtent );
}
QgsFeatureIterator fit = layer->getFeatures( req );
//fetch features
QgsFeature fet;
QgsSymbolV2* featureSymbol = 0;
while ( fit.nextFeature( fet ) )
{
featureSymbol = renderer->symbolForFeature( fet );
if ( !featureSymbol )
{
continue;
}
QHash< QgsSymbolV2*, QList<QgsFeature> >::iterator it = features.find( featureSymbol );
if ( it == features.end() )
{
it = features.insert( featureSymbol, QList<QgsFeature>() );
}
it.value().append( fet );
}
//find out order
QgsSymbolV2LevelOrder levels;
QgsSymbolV2List symbols = renderer->symbols();
for ( int i = 0; i < symbols.count(); i++ )
{
QgsSymbolV2* sym = symbols[i];
for ( int j = 0; j < sym->symbolLayerCount(); j++ )
{
int level = sym->symbolLayer( j )->renderingPass();
if ( level < 0 || level >= 1000 ) // ignore invalid levels
continue;
QgsSymbolV2LevelItem item( sym, j );
while ( level >= levels.count() ) // append new empty levels
levels.append( QgsSymbolV2Level() );
levels[level].append( item );
}
}
//export symbol layers and symbology
for ( int l = 0; l < levels.count(); l++ )
{
QgsSymbolV2Level& level = levels[l];
for ( int i = 0; i < level.count(); i++ )
{
QgsSymbolV2LevelItem& item = level[i];
QHash< QgsSymbolV2*, QList<QgsFeature> >::iterator levelIt = features.find( item.symbol() );
int llayer = item.layer();
QList<QgsFeature>& featureList = levelIt.value();
QList<QgsFeature>::iterator featureIt = featureList.begin();
for ( ; featureIt != featureList.end(); ++featureIt )
{
addFeature( sctx, layer->name(), levelIt.key()->symbolLayer( llayer ), levelIt.key() );
}
}
}
renderer->stopRender( ctx );
}