Viewing file:  menus.c (6.39 KB) -rw-r--r--
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/* 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.
*
* GtkUIManager 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 GtkUIManager.
*
*/
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <stdio.h>
static GtkWidget *
create_menu (gint depth,
gboolean tearoff)
{
GtkWidget *menu;
GtkWidget *menuitem;
GSList *group;
char buf[32];
int i, j;
if (depth < 1)
return NULL;
menu = gtk_menu_new ();
group = NULL;
if (tearoff)
{
menuitem = gtk_tearoff_menu_item_new ();
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
gtk_widget_show (menuitem);
}
for (i = 0, j = 1; i < 5; i++, j++)
{
sprintf (buf, "item %2d - %d", depth, j);
menuitem = gtk_radio_menu_item_new_with_label (group, buf);
group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menuitem));
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
gtk_widget_show (menuitem);
if (i == 3)
gtk_widget_set_sensitive (menuitem, FALSE);
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (depth - 1, TRUE));
}
return menu;
}
static void
change_orientation (GtkWidget *button,
GtkWidget *menubar)
{
GtkWidget *parent;
GtkWidget *box = NULL;
parent = gtk_widget_get_parent (menubar);
if (GTK_IS_VBOX (parent))
{
box = gtk_widget_get_parent (parent);
g_object_ref (menubar);
gtk_container_remove (GTK_CONTAINER (parent), menubar);
gtk_container_add (GTK_CONTAINER (box), menubar);
gtk_box_reorder_child (GTK_BOX (box), menubar, 0);
g_object_unref (menubar);
g_object_set (menubar,
"pack-direction", GTK_PACK_DIRECTION_TTB,
NULL);
}
else
{
GList *children, *l;
children = gtk_container_get_children (GTK_CONTAINER (parent));
for (l = children; l; l = l->next)
{
if (GTK_IS_VBOX (l->data))
{
box = l->data;
break;
}
}
g_list_free (children);
g_object_ref (menubar);
gtk_container_remove (GTK_CONTAINER (parent), menubar);
gtk_container_add (GTK_CONTAINER (box), menubar);
gtk_box_reorder_child (GTK_BOX (box), menubar, 0);
g_object_unref (menubar);
g_object_set (menubar,
"pack-direction", GTK_PACK_DIRECTION_LTR,
NULL);
}
}
GtkWidget *
do_menus (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
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_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
g_signal_connect (window, "destroy",
G_CALLBACK(gtk_widget_destroyed), &window);
g_signal_connect (window, "delete-event",
G_CALLBACK (gtk_true), NULL);
accel_group = gtk_accel_group_new ();
gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
gtk_window_set_title (GTK_WINDOW (window), "menus");
gtk_container_set_border_width (GTK_CONTAINER (window), 0);
box = gtk_hbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), box);
gtk_widget_show (box);
box1 = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (box), box1);
gtk_widget_show (box1);
menubar = gtk_menu_bar_new ();
gtk_box_pack_start (GTK_BOX (box1), menubar, FALSE, TRUE, 0);
gtk_widget_show (menubar);
menu = create_menu (2, TRUE);
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);
gtk_widget_show (menuitem);
menuitem = gtk_menu_item_new_with_label ("foo");
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (3, TRUE));
gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
gtk_widget_show (menuitem);
menuitem = gtk_menu_item_new_with_label ("bar");
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (4, TRUE));
gtk_menu_item_set_right_justified (GTK_MENU_ITEM (menuitem), TRUE);
gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
gtk_widget_show (menuitem);
box2 = gtk_vbox_new (FALSE, 10);
gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
gtk_widget_show (box2);
button = gtk_button_new_with_label ("Flip");
g_signal_connect (button, "clicked",
G_CALLBACK (change_orientation), menubar);
gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Close");
g_signal_connect_swapped (button, "clicked",
G_CALLBACK(gtk_widget_destroy), window);
gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_widget_grab_default (button);
gtk_widget_show (button);
}
if (!GTK_WIDGET_VISIBLE (window))
{
gtk_widget_show (window);
}
else
{
gtk_widget_destroy (window);
window = NULL;
}
return window;
}
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