Bug 165677 folder is not opened by double click
Data explorer pane contains following tree: + Data Sources - Postgres + Data Sets - Header DS - Chart DS + Report Parameters - Id It is common then if you double click on menu item, that is folder for other menu items (submenu), that it is opened. But in BIRT I can click to Data Sources (Data Sets, Report Params) as many times as I want but it never opens the submenu. In other words, when I doubleclick Data Sets, I want to open it and see which data sets are defined.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/internal/ui/views/data/DataViewTreeViewerPage.java
ConfigVariable cv = getRoot( ).findConfigVariable( variableName );
			try
			{
				if ( cv != null )
				{
					getRoot( ).getPropertyHandle( ReportDesignHandle.CONFIG_VARS_PROP )
							.removeItem( cv );
				}
			}
			catch ( SemanticException e )
			{
				ExceptionHandler.handle( e );
			}
		}
	}
	private void expandNodeAfterCreation( NotificationEvent ev )
	{
		if ( ev instanceof ContentEvent
				&& ev.getEventType( ) == NotificationEvent.CONTENT_EVENT
				&& ( (ContentEvent) ev ).getAction( ) == ContentEvent.ADD )
		{
			IDesignElement element = ( (ContentEvent) ev ).getContent( );
			if ( element != null )
			{
				final DesignElementHandle handle = element.getHandle( getRoot( ).getModule( ) );
				getTreeViewer( ).expandToLevel( handle,
						AbstractTreeViewer.ALL_LEVELS );