Bug 214572 Implement IAggregationCellViewProvider for crosstab/chart integration
This interface implements the model logic for the designer UI, when the users design a crosstab with charts. Note that it is independent from the multi-view feature. /** * Return the name of this view */ String getViewName( ); // this should simply return "chart" /** * Returns if the given aggregation cell matches this view */ boolean matchView( AggregationCellHandle cell ); Returns true if chart is supported in this type of aggregation cell /** * Switches given aggregation cell to this view */ void switchView( AggregationCellHandle cell ); create a chart inside the aggregation cell (and remove the data elements). This method is called when the UI tries to switch the cell contents from data element to chart. /** * Restores given aggregation cell to previous view */ void restoreView( AggregationCellHandle cell );
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ChartReportItemBuilderImpl.java
* 
	 * @see org.eclipse.birt.report.designer.ui.extensions.IReportItemBuilderUI#open(org.eclipse.birt.report.model.api.ExtendedItemHandle)
	 */
	public int open( final ExtendedItemHandle eih )
	{
		if ( iInstanceCount > 0 ) 
		{
			return Window.CANCEL;
		}
		iInstanceCount++;
		try
		{
			IReportItem item = null;
			try
			{
				item = eih.getReportItem( );
				if ( item == null )
				{
					eih.loadExtendedElement( );
					item = eih.getReportItem( );
				}
			}
			catch ( ExtendedElementException exception )
			{
				logger.log( exception );
			}
			if ( item == null )
			{
				logger.log( ILogger.ERROR,
						Messages.getString( "ChartReportItemBuilderImpl.log.UnableToLocate" ) );