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