C++ (Cpp) QgsVectorLayer::actions Examples

Example #1

File: qgsmaptoolfeatureaction.cpp Project: chhao91/QGIS

void QgsMapToolFeatureAction::canvasReleaseEvent( QMouseEvent *e )
{
  QgsMapLayer *layer = mCanvas->currentLayer();

  if ( !layer || layer->type() != QgsMapLayer::VectorLayer )
  {
    emit messageEmitted( tr( "To run an action, you must choose an active vector layer." ), QgsMessageBar::INFO );
    return;
  }

  if ( !mCanvas->layers().contains( layer ) )
  {
    // do not run actions on hidden layers
    return;
  }

  QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( layer );
  if ( vlayer->actions()->size() == 0 && QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer ).size() == 0 )
  {
    emit messageEmitted( tr( "The active vector layer has no defined actions" ), QgsMessageBar::INFO );
    return;
  }

  if ( !doAction( vlayer, e->x(), e->y() ) )
    QgisApp::instance()->statusBar()->showMessage( tr( "No features at this position found." ) );
}

Example #2

File: qgsmaptoolfeatureaction.cpp Project: Aladar64/QGIS

void QgsMapToolFeatureAction::canvasReleaseEvent( QMouseEvent *e )
{
  QgsMapLayer *layer = mCanvas->currentLayer();

  if ( !layer || layer->type() != QgsMapLayer::VectorLayer )
  {
    QMessageBox::warning( mCanvas,
                          tr( "No active vector layer" ),
                          tr( "To run an action, you must choose a vector layer by clicking on its name in the legend" ) );
    return;
  }

  if ( !mCanvas->layers().contains( layer ) )
  {
    // do not run actions on hidden layers
    return;
  }

  QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( layer );
  if ( vlayer->actions()->size() == 0 && QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer ).size() == 0 )
  {
    QMessageBox::warning( mCanvas,
                          tr( "No actions available" ),
                          tr( "The active vector layer has no defined actions" ) );
    return;
  }

  if ( !doAction( vlayer, e->x(), e->y() ) )
    QgisApp::instance()->statusBar()->showMessage( tr( "No features at this position found." ) );
}