C++ (Cpp) QgsProject::mapLayersByNameの例

コード例 #1

ファイル: testqgsproject.cpp プロジェクト: alexbruy/QGIS

static QString _getLayerSvgMarkerPath( const QgsProject &prj, const QString &layerName )
{
  QList<QgsMapLayer *> layers = prj.mapLayersByName( layerName );
  Q_ASSERT( layers.count() == 1 );
  Q_ASSERT( layers[0]->type() == QgsMapLayerType::VectorLayer );
  QgsVectorLayer *layer = qobject_cast<QgsVectorLayer *>( layers[0] );
  Q_ASSERT( layer->renderer() );
  Q_ASSERT( layer->renderer()->type() == "singleSymbol" );
  QgsSingleSymbolRenderer *r = static_cast<QgsSingleSymbolRenderer *>( layer->renderer() );
  QgsSymbol *s = r->symbol();
  Q_ASSERT( s && s->symbolLayerCount() == 1 );
  Q_ASSERT( s->symbolLayer( 0 )->layerType() == "SvgMarker" );
  QgsSvgMarkerSymbolLayer *sl = static_cast<QgsSvgMarkerSymbolLayer *>( s->symbolLayer( 0 ) );
  return sl->path();
}