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# Copyright (c) 2003-2005 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
# $Id: menus.rb,v 1.4 2005/02/12 23:02:43 kzys Exp $
=begin
= Menus
There are several widgets involved in displaying menus. The
Gtk::MenuBar widget is a horizontal menu bar, which normally appears
at the top of an application. The Gtk::Menu widget is the actual menu
that pops up. Both Gtk::MenuBar and Gtk::Menu are subclasses of
Gtk::MenuShell; a Gtk::MenuShell contains menu items
(Gtk::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 Gtk::MenuItem,
Gtk::CheckMenuItem which can be checked/unchecked, Gtk::RadioMenuItem
which is a check menu item that's in a mutually exclusive group,
Gtk::SeparatorMenuItem which is a separator bar, Gtk::TearoffMenuItem
which allows a Gtk::Menu to be torn off, and Gtk::ImageMenuItem which
can place a Gtk::Image or other widget next to the menu text.
A Gtk::MenuItem can have a submenu, which is simply a Gtk::Menu to pop
up when the menu item is selected. Typically, all menu items in a menu bar
have submenus.
The Gtk::OptionMenu widget is a button that pops up a Gtk::Menu when clicked.
It's used inside dialogs and such.
Gtk::ItemFactory 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 Gtk::ItemFactory.
=end
require 'common'
module Demo
class Menus < BasicWindow
def initialize
super('menus')
self.border_width = 0
accel_group = Gtk::AccelGroup.new
add_accel_group(accel_group)
box1 = Gtk::VBox.new(false, 0)
add(box1)
menubar = Gtk::MenuBar.new
box1.pack_start(menubar, false, true, 0)
menu = create_menu(2, true)
menuitem = Gtk::MenuItem.new("test\nline2")
menuitem.submenu = menu
menubar.append(menuitem)
menuitem.show
menuitem = Gtk::MenuItem.new('foo')
menuitem.submenu = create_menu(3, true)
menubar.append(menuitem)
menuitem.show
menuitem = Gtk::MenuItem.new('bar')
menuitem.submenu = create_menu(4, true)
menuitem.right_justified = true
menubar.append(menuitem)
menuitem.show
box2 = Gtk::VBox.new(false, 10)
box2.border_width = 10
box1.pack_start(box2, true, true, 0)
box2.show
menu = create_menu(1, false)
# menu.accel_group = accel_group
menuitem = Gtk::SeparatorMenuItem.new
menu.append(menuitem)
menuitem.show
menuitem = Gtk::CheckMenuItem.new('Accelerate Me')
menu.append(menuitem)
menuitem.show
menuitem.add_accelerator('activate',
accel_group,
Gdk::Keyval::GDK_F1,
0,
Gtk::ACCEL_VISIBLE)
menuitem = Gtk::CheckMenuItem.new('Accelerator Locked')
menu.append(menuitem)
menuitem.show
menuitem.add_accelerator('activate',
accel_group,
Gdk::Keyval::GDK_F2,
0,
Gtk::ACCEL_VISIBLE | Gtk::ACCEL_LOCKED)
menuitem = Gtk::CheckMenuItem.new('Accelerators Frozen')
menu.append(menuitem)
menuitem.show
menuitem.add_accelerator('activate',
accel_group,
Gdk::Keyval::GDK_F2,
0,
Gtk::ACCEL_VISIBLE)
menuitem.add_accelerator('activate',
accel_group,
Gdk::Keyval::GDK_F3,
0,
Gtk::ACCEL_VISIBLE)
optionmenu = Gtk::OptionMenu.new
optionmenu.menu = menu
optionmenu.history = 3
box2.pack_start(optionmenu, true, true, 0)
optionmenu.show
separator = Gtk::HSeparator.new
box1.pack_start(separator, false, true, 0)
separator.show
box2 = Gtk::VBox.new(false, 10)
box2.border_width = 10
box1.pack_start(box2, false, true, 0)
box2.show
button = Gtk::Button.new('close')
button.signal_connect('clicked') do
quit
end
box2.pack_start(button, true, true, 0)
button.flags = Gtk::Widget::CAN_DEFAULT
button.grab_default
button.show
end
def create_menu (depth, tearoff)
if depth < 1
return nil
end
menu = Gtk::Menu.new
group = nil
if tearoff
menuitem = Gtk::TearoffMenuItem.new
menu.append(menuitem)
menuitem.show
end
5.times do |i|
buf = sprintf('item %2d - %d', depth, i + 1)
menuitem = Gtk::RadioMenuItem.new(buf)
group = menuitem.group
menu.append(menuitem)
menuitem.show
if i == 3
menuitem.sensitive = false
end
if submenu = create_menu(depth - 1, true)
menuitem.submenu = submenu
end
end
menu.show
return menu
end
end
end
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