# MenuButton

Tiffany Antopolski
tiffany.antopolski@gmail.com 2013
A widget that shows a menu when clicked on
Mario Blättermann
mario.blaettermann@gmail.com 2011, 2013, 2016, 2018, 2021

# MenuButton

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.

# Code, der zum Generieren dieses Beispiels verwendet wurde

#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; }

# API-Referenzen

In diesem Beispiel haben wir Folgendes verwendet:

GtkMenuButton

GtkMenu

GMenuModel

GtkArrow