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
adjustSpan( columns, rows, details );
		addToModel( ori, columns, 0, columnBase );
		addToModel( ori, rows, rowBase, 0 );
		addToModel( ori, details, rowBase, columnBase );
		
	}
	private void adjustSpan( List columns, List rows, List details )
	{
		int columnSpanBase = ( (Integer) map.get( COLUMNAREA_COLUMN ) )
				.intValue( );
		int measureBase = getCrosstabReportItemHandle( ).getMeasureCount( );
		int rowBase = ( (Integer) map.get( ROWAREA_ROW ) ).intValue( );
		
		
		
		if ( columnSpanBase > 1 && details.size( ) == 1 )
		{
			Object obj = details.get( 0 );
			if ( obj instanceof VirtualCrosstabCellAdapter )
			{
				( (VirtualCrosstabCellAdapter) obj )
						.setColumnSpan( columnSpanBase );
			}
		}
		if ( !isVertical( ) && measureBase > 1 && columns.size( ) == 1 )
		{
			Object obj = columns.get( 0 );
			if ( obj instanceof VirtualCrosstabCellAdapter )
			{
				( (VirtualCrosstabCellAdapter) obj )