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
int measureCount = handle.getMeasureCount( );
		for ( int k = 0; k < measureCount; k++ )
		{
			MeasureViewHandle preMmeasureHandle = handle.getMeasure( k );
			retValue.add( preMmeasureHandle );
		}
		return retValue;
	}
	private boolean isBefore( CrosstabCellHandle cellHandle )
	{
		AbstractCrosstabItemHandle parent = cellHandle;
		while ( parent != null )
		{
			if ( parent instanceof LevelViewHandle )
			{
				return ICrosstabConstants.AGGREGATION_HEADER_LOCATION_BEFORE
						.equals( ( (LevelViewHandle) parent )
								.getAggregationHeaderLocation( ) );
			}
			parent = parent.getContainer( );
		}
		return false;
	}
	private boolean isPageLayoutOver( )
	{
		return getCrosstabReportItemHandle( ).getPageLayout( ).equals(
				ICrosstabConstants.PAGE_LAYOUT_DOWN_THEN_OVER );
	}
}