The GtkMenuButton widget is used to display a menu when clicked on. This menu can be provided either as a GtkMenu, or an abstract GMenuModel. The GtkMenuButton widget can hold any valid child widget. That is, it can hold almost any other standard GtkWidget. The most commonly used child is the provided GtkArrow.
You need to be running GNOME 3.6 or later for the MenuButton to work.
#include <gtk/gtk.h>
/* Callback function for the undo action */
static void
about_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
g_print ("You clicked \"About\"\n");
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
GMenu *submenu;
GtkWidget *grid;
GMenu *menumodel;
GtkWidget *window;
GtkWidget *menubutton;
GSimpleAction *about_action;
window = gtk_application_window_new (app);
grid = gtk_grid_new ();
gtk_window_set_title (GTK_WINDOW (window), "MenuButton Example");
gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
menubutton = gtk_menu_button_new ();
gtk_widget_set_size_request (menubutton, 80, 35);
gtk_grid_attach (GTK_GRID (grid), menubutton, 0, 0, 1, 1);
gtk_container_add (GTK_CONTAINER (window), grid);
menumodel = g_menu_new ();
g_menu_append (menumodel, "New", "app.new");
g_menu_append (menumodel, "About", "win.about");
submenu = g_menu_new ();
g_menu_append_submenu (menumodel, "Other", G_MENU_MODEL (submenu));
g_menu_append (submenu, "Quit", "app.quit");
gtk_menu_button_set_menu_model (GTK_MENU_BUTTON (menubutton), G_MENU_MODEL (menumodel));
about_action = g_simple_action_new ("about", NULL);
g_signal_connect (about_action, "activate", G_CALLBACK (about_callback),
GTK_WINDOW (window));
g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (about_action));
gtk_widget_show_all (window);
}
static void
new_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
g_print ("You clicked \"New\"\n");
}
static void
quit_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
GApplication *application = user_data;
g_application_quit (application);
}
static void
startup (GApplication *app,
gpointer user_data)
{
GSimpleAction *new_action;
GSimpleAction *quit_action;
new_action = g_simple_action_new ("new", NULL);
g_signal_connect (new_action, "activate", G_CALLBACK (new_callback), app);
g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (new_action));
quit_action = g_simple_action_new ("quit", NULL);
g_signal_connect (quit_action, "activate", G_CALLBACK (quit_callback), app);
g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (quit_action));
}
int
main (int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
g_signal_connect (app, "startup", G_CALLBACK (startup), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}
In this sample we used the following:
GtkMenuButton
GtkMenu
GMenuModel
GtkArrow