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/editparts/CrosstabCellEditPart.java
}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.editparts.AbstractEditPart#createChild(java.lang.Object)
	 */
	protected EditPart createChild( Object model )
	{
		EditPart part = CrosstabGraphicsFactory.INSTANCEOF.createEditPart( this,
				model );
		if ( part != null )
		{
			return part;
		}
		return super.createChild( model );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#getAdapter(java.lang.Class)
	 */
	public Object getAdapter( Class key )
	{
		if ( key == ISelectionFlitter.class )
		{
			return new ISelectionFlitter( ) {
				public List flitterEditpart( List editparts )
				{
					int size = editparts.size( );
					List copy = new ArrayList( editparts );