211 lines
6.2 KiB
C
211 lines
6.2 KiB
C
/* Menus
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*
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* There are several widgets involved in displaying menus. The
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* GtkMenuBar widget is a menu bar, which normally appears horizontally
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* at the top of an application, but can also be layed out vertically.
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* The GtkMenu widget is the actual menu that pops up. Both GtkMenuBar
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* and GtkMenu are subclasses of GtkMenuShell; a GtkMenuShell contains
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* menu items (GtkMenuItem). Each menu item contains text and/or images
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* and can be selected by the user.
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*
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* There are several kinds of menu item, including plain GtkMenuItem,
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* GtkCheckMenuItem which can be checked/unchecked, GtkRadioMenuItem
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* which is a check menu item that's in a mutually exclusive group,
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* GtkSeparatorMenuItem which is a separator bar, GtkTearoffMenuItem
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* which allows a GtkMenu to be torn off, and GtkImageMenuItem which
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* can place a GtkImage or other widget next to the menu text.
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*
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* A GtkMenuItem can have a submenu, which is simply a GtkMenu to pop
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* up when the menu item is selected. Typically, all menu items in a menu bar
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* have submenus.
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*
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* GtkUIManager provides a higher-level interface for creating menu bars
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* and menus; while you can construct menus manually, most people don't
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* do that. There's a separate demo for GtkUIManager.
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*/
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include <stdio.h>
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static GtkWidget *
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create_menu (gint depth,
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gboolean tearoff)
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{
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GtkWidget *menu;
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GtkWidget *menuitem;
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GSList *group;
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char buf[32];
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int i, j;
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if (depth < 1)
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return NULL;
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menu = gtk_menu_new ();
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group = NULL;
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if (tearoff)
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{
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menuitem = gtk_tearoff_menu_item_new ();
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
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gtk_widget_show (menuitem);
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}
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for (i = 0, j = 1; i < 5; i++, j++)
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{
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sprintf (buf, "item %2d - %d", depth, j);
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menuitem = gtk_radio_menu_item_new_with_label (group, buf);
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group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menuitem));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
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gtk_widget_show (menuitem);
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if (i == 3)
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gtk_widget_set_sensitive (menuitem, FALSE);
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gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (depth - 1, TRUE));
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}
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return menu;
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}
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static void
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change_orientation (GtkWidget *button,
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GtkWidget *menubar)
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{
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GtkWidget *parent;
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GtkWidget *box = NULL;
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parent = gtk_widget_get_parent (menubar);
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if (GTK_IS_VBOX (parent))
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{
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box = gtk_widget_get_parent (parent);
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g_object_ref (menubar);
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gtk_container_remove (GTK_CONTAINER (parent), menubar);
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gtk_container_add (GTK_CONTAINER (box), menubar);
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gtk_box_reorder_child (GTK_BOX (box), menubar, 0);
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g_object_unref (menubar);
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g_object_set (menubar,
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"pack-direction", GTK_PACK_DIRECTION_TTB,
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NULL);
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}
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else
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{
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GList *children, *l;
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children = gtk_container_get_children (GTK_CONTAINER (parent));
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for (l = children; l; l = l->next)
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{
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if (GTK_IS_VBOX (l->data))
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{
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box = l->data;
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break;
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}
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}
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g_list_free (children);
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g_object_ref (menubar);
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gtk_container_remove (GTK_CONTAINER (parent), menubar);
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gtk_container_add (GTK_CONTAINER (box), menubar);
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gtk_box_reorder_child (GTK_BOX (box), menubar, 0);
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g_object_unref (menubar);
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g_object_set (menubar,
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"pack-direction", GTK_PACK_DIRECTION_LTR,
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NULL);
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}
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}
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static GtkWidget *window = NULL;
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GtkWidget *
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do_menus (GtkWidget *do_widget)
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{
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GtkWidget *box;
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GtkWidget *box1;
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GtkWidget *box2;
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GtkWidget *button;
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if (!window)
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{
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GtkWidget *menubar;
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GtkWidget *menu;
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GtkWidget *menuitem;
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GtkAccelGroup *accel_group;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_screen (GTK_WINDOW (window),
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gtk_widget_get_screen (do_widget));
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gtk_window_set_title (GTK_WINDOW (window), "Menus");
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g_signal_connect (window, "destroy",
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G_CALLBACK(gtk_widget_destroyed), &window);
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accel_group = gtk_accel_group_new ();
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gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
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gtk_container_set_border_width (GTK_CONTAINER (window), 0);
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box = gtk_hbox_new (FALSE, 0);
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gtk_container_add (GTK_CONTAINER (window), box);
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gtk_widget_show (box);
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box1 = gtk_vbox_new (FALSE, 0);
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gtk_container_add (GTK_CONTAINER (box), box1);
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gtk_widget_show (box1);
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menubar = gtk_menu_bar_new ();
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gtk_box_pack_start (GTK_BOX (box1), menubar, FALSE, TRUE, 0);
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gtk_widget_show (menubar);
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menu = create_menu (2, TRUE);
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menuitem = gtk_menu_item_new_with_label ("test\nline2");
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gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), menu);
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gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
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gtk_widget_show (menuitem);
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menuitem = gtk_menu_item_new_with_label ("foo");
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gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (3, TRUE));
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gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
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gtk_widget_show (menuitem);
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menuitem = gtk_menu_item_new_with_label ("bar");
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gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), create_menu (4, TRUE));
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gtk_menu_item_set_right_justified (GTK_MENU_ITEM (menuitem), TRUE);
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gtk_menu_shell_append (GTK_MENU_SHELL (menubar), menuitem);
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gtk_widget_show (menuitem);
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box2 = gtk_vbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
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gtk_widget_show (box2);
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button = gtk_button_new_with_label ("Flip");
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g_signal_connect (button, "clicked",
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G_CALLBACK (change_orientation), menubar);
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gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
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gtk_widget_show (button);
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button = gtk_button_new_with_label ("Close");
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g_signal_connect_swapped (button, "clicked",
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G_CALLBACK(gtk_widget_destroy), window);
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gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
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gtk_widget_set_can_default (button, TRUE);
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gtk_widget_grab_default (button);
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gtk_widget_show (button);
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}
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if (!gtk_widget_get_visible (window))
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{
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gtk_widget_show (window);
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}
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else
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{
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gtk_widget_destroy (window);
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window = NULL;
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}
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return window;
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}
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