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/* Menus
*
* There are several widgets involved in displaying menus. The MenuBar
* widget is a horizontal menu bar, which normally appears at the top
* of an application. The Menu widget is the actual menu that pops up.
* Both MenuBar and Menu are subclasses of MenuShell; a MenuShell
* contains menu items (MenuItem). Each menu item contains text and/or
* images and can be selected by the user.
*
* There are several kinds of menu item, including plain MenuItem,
* CheckMenuItem which can be checked/unchecked, RadioMenuItem which
* is a check menu item that's in a mutually exclusive group,
* SeparatorMenuItem which is a separator bar, TearoffMenuItem which
* allows a Menu to be torn off, and ImageMenuItem which can place a
* Image or other widget next to the menu text.
*
* A MenuItem can have a submenu, which is simply a Menu to pop up
* when the menu item is selected. Typically, all menu items in a menu
* bar have submenus.
*
* UIManager provides a higher-level interface for creating menu bars
* and menus; while you can construct menus manually, most people
* don't do that. There's a separate demo for UIManager.
*
*/
using System;
using Gtk;
namespace GtkDemo
{
[Demo ("Menus", "DemoMenus.cs")]
public class DemoMenus : Gtk.Window
{
public DemoMenus () : base ("Menus")
{
AccelGroup accel_group = new AccelGroup ();
AddAccelGroup (accel_group);
VBox box1 = new VBox (false, 0);
Add (box1);
MenuBar menubar = new MenuBar ();
box1.PackStart (menubar, false, true, 0);
MenuItem menuitem = new MenuItem ("test\nline2");
menuitem.Submenu = CreateMenu (2, true);
menubar.Append (menuitem);
MenuItem menuitem1 = new MenuItem ("foo");
menuitem1.Submenu = CreateMenu (3, true);
menubar.Append (menuitem1);
menuitem = new MenuItem ("bar");
menuitem.Submenu = CreateMenu (4, true);
menuitem.RightJustified = true;
menubar.Append (menuitem);
VBox box2 = new VBox (false, 10);
box2.BorderWidth = 10;
box1.PackStart (box2, false, true, 0);
Button close = new Button ("close");
close.Clicked += new EventHandler (CloseClicked);
box2.PackStart (close, true, true, 0);
close.CanDefault = true;
close.GrabDefault ();
ShowAll ();
}
private Menu CreateMenu (int depth, bool tearoff)
{
if (depth < 1)
return null;
Menu menu = new Menu ();
RadioMenuItem[] group = null;
if (tearoff) {
TearoffMenuItem menuitem = new TearoffMenuItem ();
menu.Append (menuitem);
}
for (int i = 0, j = 1; i < 5; i++, j++) {
RadioMenuItem menuitem = new RadioMenuItem (group, String.Format ("item {0} - {1}", depth, j));
group = menuitem.Group;
menu.Append (menuitem);
if (i == 3)
menuitem.Sensitive = false;
menuitem.Submenu = CreateMenu ((depth - 1), true);
}
return menu;
}
private void CloseClicked (object o, EventArgs args)
{
Destroy ();
}
protected override bool OnDeleteEvent (Gdk.Event evt)
{
Destroy ();
return true;
}
}
}
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