Bug 209154 Enhance Report Model to support view property
The goal of this enhancement is to support a chart view property on crosstab or table report items. The view should follow the several rules: - The view automatically shares its binding with the host item, they can't be modified. - The view can be retrieved through the API only by querying it from the host item, through a getView() method. It is not accessible directly by id - A property should be available to control whether the host or view should be displayed (default is host item). If possible, this should be controllable using report parameters. - The model should return the visibile view to the report engine to ensure that there is no impact on engine code to support this new view. - The host/view combination is a single report item with a unique id Since the chart is an extended item, the model can provide additional properties to indicate which item can be view, and which item can be a host. For 2.3, only table and crosstab can be hosts, and only chart can be a view.
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/internal/CrosstabReportItemTask.java
* @return
	 * @throws SemanticException
	 */
	public CrosstabCellHandle addGrandTotal( int axisType, List measureList,
			List functionList ) throws SemanticException
	{
		if ( crosstab == null || !CrosstabModelUtil.isValidAxisType( axisType ) )
			return null;
		CommandStack stack = crosstab.getCommandStack( );
		stack.startTrans( Messages.getString( "CrosstabReportItemTask.msg.add.grandtotal" ) ); 
		CrosstabCellHandle grandTotal = null;
		try
		{
			CrosstabViewHandle crosstabView = crosstab.getCrosstabView( axisType );
			if ( crosstabView == null )
			{
				crosstabView = crosstab.addCrosstabView( axisType );
			}
			grandTotal = new CrosstabViewTask( crosstabView ).addGrandTotal( measureList,
					functionList,
					false );
		}
		catch ( SemanticException e )
		{
			stack.rollback( );
			throw e;
		}
		stack.commit( );
		return grandTotal;
	}