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#!/usr/bin/perl -w
#
# Menus
#
# There are several widgets involved in displaying menus. The
# GtkMenuBar widget is a horizontal menu bar, which normally appears
# at the top of an application. The GtkMenu widget is the actual menu
# that pops up. Both GtkMenuBar and GtkMenu are subclasses of
# GtkMenuShell; a GtkMenuShell contains menu items
# (GtkMenuItem). Each menu item contains text and/or images and can
# be selected by the user.
#
# There are several kinds of menu item, including plain GtkMenuItem,
# GtkCheckMenuItem which can be checked/unchecked, GtkRadioMenuItem
# which is a check menu item that's in a mutually exclusive group,
# GtkSeparatorMenuItem which is a separator bar, GtkTearoffMenuItem
# which allows a GtkMenu to be torn off, and GtkImageMenuItem which
# can place a GtkImage or other widget next to the menu text.
#
# A GtkMenuItem can have a submenu, which is simply a GtkMenu to pop
# up when the menu item is selected. Typically, all menu items in a menu bar
# have submenus.
#
# The GtkOptionMenu widget is a button that pops up a GtkMenu when clicked.
# It's used inside dialogs and such.
#
# GtkItemFactory 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 GtkItemFactory.
#
#
package menus;
use strict;
use Glib qw(TRUE FALSE);
use Gtk2;
use Gtk2::Gdk::Keysyms;
sub create_menu {
my ($depth, $tearoff) = @_;
return undef if $depth < 1;
my $menu = Gtk2::Menu->new;
my $group = undef;
if ($tearoff) {
my $menuitem = Gtk2::TearoffMenuItem->new;
$menu->append ($menuitem);
$menuitem->show;
}
my ($i, $j);
for ($i = 0, $j = 1; $i < 5; $i++, $j++) {
my $buf = sprintf 'item %2d - %d', $depth, $j;
#warn "creating [".($group?$group:"undef")."][$buf]\n";
my $menuitem = Gtk2::RadioMenuItem->new_with_label ($group, $buf);
$group = $menuitem->get_group;
$menu->append ($menuitem);
$menuitem->show;
$menuitem->set_sensitive (FALSE)
if $i == 3;
#$menuitem->set_submenu (create_menu ($depth - 1, TRUE));
my $submenu = create_menu ($depth - 1, TRUE);
$menuitem->set_submenu ($submenu) if defined $submenu;
}
return $menu;
}
my $window = undef;
sub do {
if (!$window) {
$window = Gtk2::Window->new;
$window->signal_connect (destroy => sub { $window = undef; 1 });
$window->signal_connect (delete_event => sub { 1 });
my $accel_group = Gtk2::AccelGroup->new;
$window->add_accel_group ($accel_group);
$window->set_title ("menus");
$window->set_border_width (0);
my $box1 = Gtk2::VBox->new (FALSE, 0);
$window->add ($box1);
$box1->show;
my $menubar = Gtk2::MenuBar->new;
$box1->pack_start ($menubar, FALSE, TRUE, 0);
$menubar->show;
my $menu = create_menu (2, TRUE);
my $menuitem = Gtk2::MenuItem->new_with_label ("test\nline2");
$menuitem->set_submenu ($menu);
$menubar->append ($menuitem);
$menuitem->show;
$menuitem = Gtk2::MenuItem->new_with_label ("foo");
$menuitem->set_submenu (create_menu (3, TRUE));
$menubar->append ($menuitem);
$menuitem->show;
$menuitem = Gtk2::MenuItem->new_with_label ("bar");
$menuitem->set_submenu (create_menu (4, TRUE));
$menuitem->set_right_justified (TRUE);
$menubar->append ($menuitem);
$menuitem->show;
my $box2 = Gtk2::VBox->new (FALSE, 10);
$box2->set_border_width (10);
$box1->pack_start ($box2, TRUE, TRUE, 0);
$box2->show;
$menu = create_menu (1, FALSE);
$menu->set_accel_group ($accel_group);
$menuitem = Gtk2::SeparatorMenuItem->new;
$menu->append ($menuitem);
$menuitem->show;
$menuitem = Gtk2::CheckMenuItem->new_with_label ("Accelerate Me");
$menu->append ($menuitem);
$menuitem->show;
$menuitem->show;
$menuitem->add_accelerator (activate => $accel_group,
$Gtk2::Gdk::Keysyms{F1}, #GDK_F1,
[], ['visible']);
$menuitem = Gtk2::CheckMenuItem->new_with_label ("Accelerator Locked");
$menu->append ($menuitem);
$menuitem->show;
$menuitem->add_accelerator (activate => $accel_group,
$Gtk2::Gdk::Keysyms{F2}, #GDK_F2,
[], [qw/visible locked/]);
$menuitem = Gtk2::CheckMenuItem->new_with_label ("Accelerators Frozen");
$menu->append ($menuitem);
$menuitem->show;
$menuitem->add_accelerator (activate => $accel_group,
$Gtk2::Gdk::Keysyms{F2}, #GDK_F2,
[], ['visible']);
$menuitem->add_accelerator (activate => $accel_group,
$Gtk2::Gdk::Keysyms{F3}, #GDK_F3,
[], ['visible']);
my $optionmenu = Gtk2::OptionMenu->new;
$optionmenu->set_menu ($menu);
$optionmenu->set_history (3);
$box2->pack_start ($optionmenu, TRUE, TRUE, 0);
$optionmenu->show;
my $separator = Gtk2::HSeparator->new;
$box1->pack_start ($separator, FALSE, TRUE, 0);
$separator->show;
$box2 = Gtk2::VBox->new (FALSE, 10);
$box2->set_border_width (10);
$box1->pack_start ($box2, FALSE, TRUE, 0);
$box2->show;
## my $button = Gtk2::Button->new_with_label ("close");
my $button = Gtk2::Button->new ("close");
$button->signal_connect_swapped (clicked => sub { $window->destroy; 1 });
$box2->pack_start ($button, TRUE, TRUE, 0);
$button->set_flags ('can-default');
$button->grab_default;
$button->show;
}
if (! $window->visible) {
$window->show;
} else {
$window->destroy;
$window = undef;
}
return $window;
}
1;
__END__
Copyright (C) 2003 by the gtk2-perl team (see the file AUTHORS for the
full list)
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Library General Public License as published by the Free
Software Foundation; either version 2.1 of the License, or (at your option) any
later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU Library General Public License for more
details.
You should have received a copy of the GNU Library General Public License along
with this library; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307 USA.
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