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
else if ( CELL_SUB_TOTAL.equals( type ) )
			{
				retValue = new TotalCrosstabCellHandleAdapter( handle );
				( (TotalCrosstabCellHandleAdapter) retValue )
						.setType( TotalCrosstabCellHandleAdapter.SUB_TOTAL );
			}
			else if ( CELL_GRAND_TOTAL.equals( type ) )
			{
				retValue = new TotalCrosstabCellHandleAdapter( handle );
				( (TotalCrosstabCellHandleAdapter) retValue )
						.setType( TotalCrosstabCellHandleAdapter.GRAND_TOTAL );
			}
			else if ( CELL_MEASURE_AGGREGATION.equals( type ) )
			{
				retValue = new AggregationCrosstabCellAdapter(
						(AggregationCellHandle) handle );
			}
			if ( retValue == null )
			{
				return retValue;
			}
			if ( isConvert )
			{
				int temp = rowNumber;
				rowNumber = columnNumber;
				columnNumber = temp;
				temp = rowSpan;
				rowSpan = columnSpan;
				columnSpan = temp;
			}