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/src/org/eclipse/birt/chart/reportitem/ChartReportItemUtil.java
* 
	 * @param chartHandle
	 *            the handle holding chart
	 * @return true means within cross tab, false means not
	 * @since 2.3
	 */
	public static boolean isChartInXTab( DesignElementHandle chartHandle )
	{
		DesignElementHandle container = chartHandle.getContainer( );
		if ( container instanceof ExtendedItemHandle )
		{
			String exName = ( (ExtendedItemHandle) container ).getExtensionName( );
			if ( ICrosstabConstants.AGGREGATION_CELL_EXTENSION_NAME.equals( exName ) )
			{
				return true;
			}
		}
		return false;
	}
	/**
	 * Returns the element handle which can save binding columns the given
	 * element
	 * 
	 * @param handle
	 *            the handle of the element which needs binding columns
	 * @return the holder for the element,or itself if no holder available
	 */
	public static ReportItemHandle getBindingHolder( DesignElementHandle handle )
	{
		if ( handle instanceof ReportElementHandle )