- myReversedEdgesBox->setShown( !distr==0 );
- myDirectionWidget->ShowPreview( !distr==0 );
- if ( myReversedEdgesHelper )
- myReversedEdgesHelper->setShown( !distr==0 );
+ myReversedEdgesBox->setShown( distr!=0 );
+ if ( myReversedEdgesHelper ) {
+ myReversedEdgesHelper->Clear();
+ myReversedEdgesHelper->setShown( distr!=0 );
+ }
+ myDirectionWidget->ShowPreview( distr!=0 );