bool QgsMapToolLabel::layerIsRotatable( QgsVectorLayer *vlayer, int &rotationCol ) const
{
if ( !vlayer || !vlayer->isEditable() || !vlayer->labelsEnabled() )
{
return false;
}
Q_FOREACH ( const QString &providerId, vlayer->labeling()->subProviders() )
{
if ( labelIsRotatable( vlayer, vlayer->labeling()->settings( providerId ), rotationCol ) )
return true;
}
return false;
}
void QgsMapToolRotateLabel::canvasReleaseEvent( QgsMapMouseEvent* e )
{
Q_UNUSED( e );
if ( !mLabelRubberBand ) //no rubber band created (most likely because the current label cannot be rotated )
{
return;
}
deleteRubberBands();
delete mRotationItem;
mRotationItem = nullptr;
delete mRotationPreviewBox;
mRotationPreviewBox = nullptr;
QgsVectorLayer* vlayer = mCurrentLabel.layer;
if ( !vlayer )
{
return;
}
int rotationCol;
if ( !labelIsRotatable( vlayer, mCurrentLabel.settings, rotationCol ) )
{
return;
}
double rotation = mCtrlPressed ? roundTo15Degrees( mCurrentRotation ) : mCurrentRotation;
if ( rotation == mStartRotation ) //mouse button pressed / released, but no rotation
{
return;
}
vlayer->beginEditCommand( tr( "Rotated label" ) + QString( " '%1'" ).arg( currentLabelText( 24 ) ) );
vlayer->changeAttributeValue( mCurrentLabel.pos.featureId, rotationCol, rotation );
vlayer->endEditCommand();
vlayer->triggerRepaint();
}
bool QgsMapToolLabel::currentLabelDataDefinedRotation( double &rotation, bool &rotationSuccess, int &rCol, bool ignoreXY ) const
{
QgsVectorLayer *vlayer = mCurrentLabel.layer;
QgsFeatureId featureId = mCurrentLabel.pos.featureId;
rotationSuccess = false;
if ( !vlayer )
{
return false;
}
if ( !labelIsRotatable( vlayer, mCurrentLabel.settings, rCol ) )
{
return false;
}
QgsFeature f;
if ( !vlayer->getFeatures( QgsFeatureRequest().setFilterFid( featureId ).setFlags( QgsFeatureRequest::NoGeometry ) ).nextFeature( f ) )
{
return false;
}
//test, if data defined x- and y- values are not null. Otherwise, the position is determined by PAL and the rotation cannot be fixed
if ( !ignoreXY )
{
int xCol, yCol;
double x, y;
bool xSuccess, ySuccess;
if ( !currentLabelDataDefinedPosition( x, xSuccess, y, ySuccess, xCol, yCol ) || !xSuccess || !ySuccess )
{
return false;
}
}
rotation = f.attribute( rCol ).toDouble( &rotationSuccess );
return true;
}
