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import gi
gi.require_version("Gtk", "4.0")
from gi.repository import Gio, Gtk
# This would typically be its own file
MENU_XML = """
<?xml version='1.0' encoding='UTF-8'?>
<interface>
<menu id='app-menu'>
<section>
<item>
<attribute name='label'>About</attribute>
<attribute name='action'>app.about</attribute>
</item>
<item>
<attribute name='label'>Quit</attribute>
<attribute name='action'>app.quit</attribute>
</item>
</section>
</menu>
</interface>
"""
class AppWindow(Gtk.ApplicationWindow):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.set_default_size(300, 200)
headerbar = Gtk.HeaderBar()
self.set_titlebar(headerbar)
builder = Gtk.Builder.new_from_string(MENU_XML, -1)
menu_model = builder.get_object("app-menu")
button = Gtk.MenuButton(menu_model=menu_model)
headerbar.pack_end(button)
class Application(Gtk.Application):
def __init__(self, **kwargs):
super().__init__(application_id="com.example.App", **kwargs)
self.window = None
def do_startup(self):
Gtk.Application.do_startup(self)
action = Gio.SimpleAction(name="about")
action.connect("activate", self.on_about)
self.add_action(action)
action = Gio.SimpleAction(name="quit")
action.connect("activate", self.on_quit)
self.add_action(action)
def do_activate(self):
# We only allow a single window and raise any existing ones
if not self.window:
# Windows are associated with the application
# when the last one is closed the application shuts down
self.window = AppWindow(application=self, title="Main Window")
self.window.present()
def on_about(self, action, param):
about_dialog = Gtk.AboutDialog(transient_for=self.window, modal=True)
about_dialog.present()
def on_quit(self, action, param):
self.quit()
app = Application()
app.run(None)
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