void QgsComposerLabel::refreshExpressionContext()
{
if ( !mComposition )
return;
QgsVectorLayer *layer = nullptr;
if ( mComposition->atlasComposition().enabled() )
{
layer = mComposition->atlasComposition().coverageLayer();
}
//setup distance area conversion
if ( layer )
{
mDistanceArea->setSourceCrs( layer->crs() );
}
else
{
//set to composition's reference map's crs
QgsComposerMap *referenceMap = mComposition->referenceMap();
if ( referenceMap )
mDistanceArea->setSourceCrs( referenceMap->crs() );
}
mDistanceArea->setEllipsoid( mComposition->project()->ellipsoid() );
contentChanged();
update();
}
void QgsLayoutItemHtml::setExpressionContext( const QgsFeature &feature, QgsVectorLayer *layer )
{
mExpressionFeature = feature;
mExpressionLayer = layer;
//setup distance area conversion
if ( layer )
{
mDistanceArea.setSourceCrs( layer->crs() );
}
else if ( mLayout )
{
#if 0 //TODO
//set to composition's mapsettings' crs
QgsComposerMap *referenceMap = mComposition->referenceMap();
if ( referenceMap )
mDistanceArea->setSourceCrs( referenceMap->crs() );
#endif
}
if ( mLayout )
{
mDistanceArea.setEllipsoid( mLayout->project()->ellipsoid() );
}
// create JSON representation of feature
QgsJsonExporter exporter( layer );
exporter.setIncludeRelated( true );
mAtlasFeatureJSON = exporter.exportFeature( feature );
}