C++ (Cpp) QgsMapSettings::setExpressionContext 예제들

예제 #1

파일: qgspointmarkeritem.cpp 프로젝트: 3liz/Quantum-GIS

QgsRenderContext QgsPointMarkerItem::renderContext( QPainter* painter )
{
  QgsExpressionContext context;
  context << QgsExpressionContextUtils::globalScope()
  << QgsExpressionContextUtils::projectScope()
  << QgsExpressionContextUtils::atlasScope( nullptr );
  if ( mMapCanvas )
  {
    context << QgsExpressionContextUtils::mapSettingsScope( mMapCanvas->mapSettings() )
    << new QgsExpressionContextScope( mMapCanvas->expressionContextScope() );
  }
  else
  {
    context << QgsExpressionContextUtils::mapSettingsScope( QgsMapSettings() );
  }
  //context << QgsExpressionContextUtils::layerScope( mLayer );
  context.setFeature( mFeature );

  //setup render context
  QgsMapSettings ms = mMapCanvas->mapSettings();
  ms.setExpressionContext( context );
  QgsRenderContext rc = QgsRenderContext::fromMapSettings( ms );
  rc.setPainter( painter );

  return rc;
}