void QgsActionManager::doAction( const QUuid& actionId, const QgsFeature& feat, const QgsExpressionContext& context )
{
QgsAction act = action( actionId );
if ( !act.isValid() || !act.runable() )
return;
QgsExpressionContext actionContext( context );
if ( mLayer )
actionContext << QgsExpressionContextUtils::layerScope( mLayer );
actionContext.setFeature( feat );
QString expandedAction = QgsExpression::replaceExpressionText( act.command(), &actionContext );
if ( expandedAction.isEmpty() )
return;
QgsAction newAction( act.type(), act.name(), expandedAction, act.capture() );
runAction( newAction );
}
bool QgsMapToolFeatureAction::doAction( QgsVectorLayer *layer, int x, int y )
{
if ( !layer )
return false;
QgsPointXY point = mCanvas->getCoordinateTransform()->toMapCoordinates( x, y );
QgsRectangle r;
// create the search rectangle
double searchRadius = searchRadiusMU( mCanvas );
r.setXMinimum( point.x() - searchRadius );
r.setXMaximum( point.x() + searchRadius );
r.setYMinimum( point.y() - searchRadius );
r.setYMaximum( point.y() + searchRadius );
// toLayerCoordinates will throw an exception for an 'invalid' point.
// For example, if you project a world map onto a globe using EPSG 2163
// and then click somewhere off the globe, an exception will be thrown.
try
{
r = toLayerCoordinates( layer, r );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
// catch exception for 'invalid' point and proceed with no features found
QgsDebugMsg( QString( "Caught CRS exception %1" ).arg( cse.what() ) );
}
QgsAction defaultAction = layer->actions()->defaultAction( QStringLiteral( "Canvas" ) );
QgsFeatureIterator fit = layer->getFeatures( QgsFeatureRequest().setFilterRect( r ).setFlags( QgsFeatureRequest::ExactIntersect ) );
QgsFeature feat;
while ( fit.nextFeature( feat ) )
{
if ( defaultAction.isValid() )
{
// define custom substitutions: layer id and clicked coords
QgsExpressionContext context;
context << QgsExpressionContextUtils::globalScope()
<< QgsExpressionContextUtils::projectScope( QgsProject::instance() )
<< QgsExpressionContextUtils::mapSettingsScope( mCanvas->mapSettings() );
QgsExpressionContextScope *actionScope = new QgsExpressionContextScope();
actionScope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "click_x" ), point.x(), true ) );
actionScope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "click_y" ), point.y(), true ) );
actionScope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "action_scope" ), QStringLiteral( "Canvas" ), true ) );
context << actionScope;
defaultAction.run( layer, feat, context );
}
else
{
QgsMapLayerAction *mapLayerAction = QgsGui::mapLayerActionRegistry()->defaultActionForLayer( layer );
if ( mapLayerAction )
{
mapLayerAction->triggerForFeature( layer, &feat );
}
}
}
return true;
}
