void QgsMapToolShowHideLabels::canvasPressEvent( QgsMapMouseEvent *e )
{
Q_UNUSED( e );
QgsMapLayer *layer = mCanvas->currentLayer();
QgsVectorLayer *vlayer = dynamic_cast<QgsVectorLayer *>( layer );
if ( !vlayer )
return;
int showCol;
if ( !labelCanShowHide( vlayer, showCol )
|| !diagramCanShowHide( vlayer, showCol ) )
{
if ( !vlayer->auxiliaryLayer() )
{
QgsNewAuxiliaryLayerDialog dlg( vlayer );
dlg.exec();
return;
}
}
mSelectRect.setRect( 0, 0, 0, 0 );
mSelectRect.setTopLeft( e->pos() );
mSelectRect.setBottomRight( e->pos() );
mRubberBand = new QgsRubberBand( mCanvas, QgsWkbTypes::PolygonGeometry );
}
bool QgsMapToolLabel::dataDefinedShowHide( QgsVectorLayer *vlayer, QgsFeatureId featureId, int &show, bool &showSuccess, int &showCol ) const
{
showSuccess = false;
if ( !vlayer )
{
return false;
}
if ( mCurrentLabel.pos.isDiagram )
{
if ( ! diagramCanShowHide( vlayer, showCol ) )
{
return false;
}
}
else if ( ! labelCanShowHide( vlayer, showCol ) )
{
return false;
}
QgsFeature f;
if ( !vlayer->getFeatures( QgsFeatureRequest().setFilterFid( featureId ).setFlags( QgsFeatureRequest::NoGeometry ) ).nextFeature( f ) )
{
return false;
}
show = f.attribute( showCol ).toInt( &showSuccess );
return true;
}
bool QgsMapToolShowHideLabels::showHide( const QgsLabelPosition &pos, bool show )
{
LabelDetails details = LabelDetails( pos );
if ( !details.valid )
return false;
QgsVectorLayer *vlayer = details.layer;
if ( !vlayer )
return false;
int showCol = -1;
if ( pos.isDiagram )
{
if ( !diagramCanShowHide( vlayer, showCol ) )
{
QgsDiagramIndexes indexes;
createAuxiliaryFields( details, indexes );
showCol = indexes[ QgsDiagramLayerSettings::Show ];
}
}
else
{
if ( !labelCanShowHide( vlayer, showCol ) )
{
QgsPalIndexes indexes;
createAuxiliaryFields( details, indexes );
showCol = indexes[ QgsPalLayerSettings::Show ];
}
}
if ( showCol >= 0 )
{
int showVal = show ? 1 : 0;
vlayer->changeAttributeValue( pos.featureId, showCol, showVal );
return true;
}
return false;
}