Bug 39935 Package Explorer drop down Layout sub-menu should use radio buttons [package explorer]
Using build 200307090800, if you drop down the Package Explorer view menu, and open the Layout sub-menu, you will see Flat, and Hierarchical as toggle (check) style buttons. These should be radio buttons since only one can be selected at one time. If you are using the viewActions extension point, then there is a "style" attribute you can use to specify "radio" behavior. If you are contributing these via code, there is a new constructor on Action that you can specify the style.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/actions/MultiActionGroup.java
private IAction[] fActions; 
	
	private int fCurrentSelection;
	private MenuItem[] fItems;
	
	/**
	 * Creates a new action group with a given set of actions.
	 * 
	 * @param actions			the actions for this multi group
	 * @param currentSelection	decides which action is selected in the menu on start up.
	 * 							Denotes the location in the actions array of the current
	 * 							selected state. It cannot be null.
	 */
	public MultiActionGroup(IAction[] actions, int currentSelection) {
		super();
		
		fCurrentSelection= currentSelection;
		fActions= actions;
	}
	/**
	 * Add the actions to the given menu manager.
	 */
	protected void addActions(IMenuManager viewMenu) {
		viewMenu.add(new Separator());
		fItems= new MenuItem[fActions.length];
		for (int i= 0; i < fActions.length; i++) {
			final int j= i;