Eclipse OwnerDrawLabelProvider makes selection background dark blue

Question

I'm currently developing an Eclipse RCP application, and am in need of using an OwnerDrawLabelProvider as a CellLabelProvider for a TableViewerColumn This is because when I use any other CellLabelProvider, the Image used is not centered.

My problem is that when the row is selected, the background of the cell that has this provider is of a darker blue than all the other cells.

This is how the "selected" state looks:

Here's my OwnerDrawLabelProvider:

class SomeLabelProvider extends OwnerDrawLabelProvider {
            private static final int smallColumnSize = 70;

            @Override
            protected void measure( Event event, Object element ) {
                Rectangle rectangle = IMAGE_CHECKED.getBounds();
                event.setBounds( new Rectangle( event.x, event.y, smallColumnSize, 
                                                              rectangle.height ) );
            }

            @Override
            protected void paint( Event event, Object element ) {
                Rectangle bounds = event.getBounds();
                //paint icon at the center
                event.gc.drawImage( getImage( element ),
                                    bounds.x + ((smallColumnSize - 
                                    IMAGE_CHECKED.getBounds().width) / 2),
                                    bounds.y );
            }

            //this is implemented somewhere else
            protected abstract Image getImage( Object element );

        }

Thanks in advance!

Answer 1

This is caused by the default erase method, the JavaDoc for this says:

Handle the erase event. The default implementation colors the background of selected areas with SWT.COLOR_LIST_SELECTION and foregrounds with SWT.COLOR_LIST_SELECTION_TEXT. Note that this implementation causes non-native behavior on some platforms. Subclasses should override this method and not call the super implementation.

So just add an erase override which does nothing:

@Override
protected void erase(Event event, Object element) 
{
  // Don't call super to avoid selection draw
}