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
Menu menu = menuManager.createContextMenu( getTreeViewer( ).getControl( ) );
		getTreeViewer( ).getControl( ).setMenu( menu );
		getSite( ).registerContextMenu( "#Pop up", menuManager, 
				getSite( ).getSelectionProvider( ) );				
	}
	/**
	 * Configures the tree viewer.
	 */
	protected void configTreeViewer( )
	{
		ViewsTreeProvider provider = new ViewsTreeProvider( );
		getTreeViewer( ).setContentProvider( provider );
		getTreeViewer( ).setLabelProvider( provider );
		initRoot( );
		
		
		int ops = DND.DROP_MOVE | DND.DROP_COPY;
		Transfer[] transfers = new Transfer[]{
			TemplateTransfer.getInstance( )
		};
		getTreeViewer( ).addDragSupport( ops,
				transfers,
				new DesignerDragListener( getTreeViewer( ) ) );
		transfers = new Transfer[]{
			TemplateTransfer.getInstance( )
		};
		ops = DND.DROP_COPY | DND.DROP_MOVE;
		
		DesignerDropListener dropListener = new DesignerDropListener( getTreeViewer( ) );