Bug 182000 Cross tab layout behavior
In the current approach of cross tab layout view, the arrow is associated with the first data item in the cell. - User cannot delete measure and level data items which have arrow with them. -Wenbin has concerns with the approach, as this will make the UI very restrictive. - Also user may want to delete data item and just show image in a cross tab cell. We had a discussion with Bang, and he has revised the mockups for the layout - The idea is that the arrow is associated with the cross tab cell and not data item. Let us know if there are any issues with supporting this.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/editors/model/CrosstabHandleAdapter.java
DimensionHandle handle = ( (ExtendedItemHandle) getAdapter( DesignElementHandle.class ) )
				.getWidth( );
		if ( handle.getUnits( ) == null || handle.getUnits( ).length( ) == 0 )
		{
			
			
			
			return DEFAULT_WIDTH;
			
		}
		else if ( DesignChoiceConstants.UNITS_PERCENTAGE.equals( handle
				.getUnits( ) ) )
		{
			return handle.getMeasure( )
					+ DesignChoiceConstants.UNITS_PERCENTAGE;
		}
		else
		{
			int px = (int) DEUtil.convertoToPixel( handle );
			if ( px <= 0 )
			{
				return null;
			}
			return String.valueOf( px );
		}
	}
	/**
	 * Comparator the cell adapter row by row , column by column ModelComparator
	 */
	private class ModelComparator implements Comparator