Bug 129886 Delect a column contain the marge row which contain some item, Error message pop up
Details: Delect a column contain the marge row which contain some item, Error message pop up Setp: 1.New a library and add a 3*3 grid 2.Insert a label in cell(1,1) 3.Marge the cell of (1,1) and (1,2) 4.Delete column 1. Actual result: An error message pop up
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/TableEditPart.java
removeColumnListener( );
		removeGroupListener();
	}
	private void removeGroupListener( )
	{
		if(getModel() instanceof ListingHandle)
		{
			for ( Iterator it = ( (ListingHandle) getModel( ) ).getGroups( )
					.iterator( ); it.hasNext( ); )
			{
				( (DesignElementHandle) it.next( ) ).removeListener(  this );
			}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#createFigure()
	 */
	protected IFigure createFigure( )
	{
		TableFigure viewport = new TableFigure( );
		viewport.setOpaque( false );
		innerLayers = new FreeformLayeredPane( );
		createLayers( innerLayers );
		viewport.setContents( innerLayers );
		return viewport;
	}
	/*
	 * (non-Javadoc)