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
ICrosstabCellAdapterFactory.CELL_SUB_TOTAL ) )
			{
				continue;
			}
			if ( isBefore( adapter.getCrosstabCellHandle( ) ) )
			{
				CrosstabCellAdapter beforeAdapter = getCell( row - 1, column,
						rows );
				int beforeRow = beforeAdapter.getRowNumber( );
				int beforeRowSpan = beforeAdapter.getRowSpan( );
				for ( int j = 0; j < rows.size( ); j++ )
				{
					CrosstabCellAdapter tempAdapter = (CrosstabCellAdapter) rows
							.get( j );
					if ( tempAdapter.getColumnNumber( ) < column )
					{
						continue;
					}
					int tempRowNumber = tempAdapter.getRowNumber( );
					if ( tempRowNumber >= beforeRow
							&& tempRowNumber < beforeRow + beforeRowSpan )
					{
						tempAdapter.setRowNumber( tempRowNumber + rowSpan );
					}
					else if ( tempRowNumber >= row
							&& tempRowNumber < row + rowSpan )
					{
						tempAdapter
								.setRowNumber( tempRowNumber - beforeRowSpan );
					}