gtk2/demos/gtk-demo/menus.c
Matthias Clasen 92e21c3f1c Drop the can-default property
It was added at a time when default buttons
had a very large external border that would disrupt
aligment. Not a problem nowadays.
2019-04-28 23:28:39 +00:00

148 lines
4.7 KiB
C

/* Menus
*
* There are several widgets involved in displaying menus. The
* GtkMenuBar widget is a menu bar, which normally appears horizontally
* at the top of an application, but can also be layed out vertically.
* 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.
*/
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <stdio.h>
static GtkWidget *
create_menu (gint depth)
{
GtkWidget *menu;
GtkRadioMenuItem *last_item;
char buf[32];
int i, j;
if (depth < 1)
return NULL;
menu = gtk_menu_new ();
last_item = NULL;
for (i = 0, j = 1; i < 5; i++, j++)
{
GtkWidget *menu_item;
sprintf (buf, "item %2d - %d", depth, j);
menu_item = gtk_radio_menu_item_new_with_label_from_widget (NULL, buf);
gtk_radio_menu_item_join_group (GTK_RADIO_MENU_ITEM (menu_item), last_item);
last_item = GTK_RADIO_MENU_ITEM (menu_item);
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
gtk_widget_show (menu_item);
if (i == 3)
gtk_widget_set_sensitive (menu_item, FALSE);
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu_item), create_menu (depth - 1));
}
return menu;
}
static void
change_orientation (GtkWidget *button,
GtkWidget *menubar)
{
GtkWidget *parent;
GtkOrientation orientation;
parent = gtk_widget_get_parent (menubar);
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (parent));
gtk_orientable_set_orientation (GTK_ORIENTABLE (parent), 1 - orientation);
}
static GtkWidget *window = NULL;
GtkWidget *
do_menus (GtkWidget *do_widget)
{
GtkWidget *box;
GtkWidget *box1;
GtkWidget *box2;
GtkWidget *button;
if (!window)
{
GtkWidget *menubar;
GtkWidget *menu;
GtkWidget *menuitem;
GtkAccelGroup *accel_group;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Menus");
g_signal_connect (window, "destroy",
G_CALLBACK(gtk_widget_destroyed), &window);
accel_group = gtk_accel_group_new ();
gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_container_add (GTK_CONTAINER (window), box);
box1 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (box), box1);
menubar = gtk_menu_bar_new ();
gtk_widget_set_hexpand (menubar, TRUE);
gtk_container_add (GTK_CONTAINER (box1), menubar);
menu = create_menu (2);
menuitem = gtk_menu_item_new_with_label ("test\nline2");
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), menu);
gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
menuitem = gtk_menu_item_new_with_label ("foo");
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (3));
gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
menuitem = gtk_menu_item_new_with_label ("bar");
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (4));
gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
box2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
gtk_container_add (GTK_CONTAINER (box1), box2);
button = gtk_button_new_with_label ("Flip");
g_signal_connect (button, "clicked",
G_CALLBACK (change_orientation), menubar);
gtk_container_add (GTK_CONTAINER (box2), button);
button = gtk_button_new_with_label ("Close");
g_signal_connect_swapped (button, "clicked",
G_CALLBACK(gtk_widget_destroy), window);
gtk_container_add (GTK_CONTAINER (box2), button);
gtk_window_set_default_widget (GTK_WINDOW (window), button);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}