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
if ( object instanceof DataSetHandle )
			{
				if ( canInsert )
					tooltip.append( Messages.getString( "DataViewTreeViewerPage.tooltip.DragToInsertDataSetColumns" ) 
							+ text
							+ "; " ); 
				tooltip.append( LABEL_DOUBLE_CLICK );
			}
			if ( object instanceof DataSetItemModel
					|| object instanceof ResultSetColumnHandle )
			{
				if ( canInsert )
					tooltip.append( Messages.getString( "DataViewTreeViewerPage.tooltip.DragToInsertColumn" ) + text ); 
			}
			if ( object instanceof ParameterHandle )
			{
				if ( canInsert )
					tooltip.append( Messages.getString( "DataViewTreeViewerPage.tooltip.DragToInsertParameter" ) ); 
				tooltip.append( LABEL_DOUBLE_CLICK );
			}
			return tooltip.toString( );
		}
		return ""; 
	}
	/**
	 * Creates the context menu
	 */
	private void createContextMenus( )
	{
		MenuManager menuManager = new ViewContextMenuProvider( getTreeViewer( ) );