from gi.repository import Gtk

from gi.repository import Gdk

from gi.repository import Gio

import sys

class MyWindow(Gtk.ApplicationWindow):

    def __init__(self, app):

        Gtk.Window.__init__(self, title="Toolbar Example", application=app)

        self.set_default_size(400, 200)

        # a grid to attach the toolbar (see below)

        grid = Gtk.Grid()

        self.add(grid)

        # we have to show the grid (and therefore the toolbar) with show(),

        # as show_all() would show also the buttons in the toolbar that we want to

        # be hidden (such as the leave_fullscreen button)

        grid.show()

        # a builder to add the UI designed with Glade to the grid:

        builder = Gtk.Builder()

        # get the file (if it is there)

        try:

            builder.add_from_file("toolbar_builder.ui")

        except:

            print("file not found")

            sys.exit()

        # and attach it to the grid

        grid.attach(builder.get_object("toolbar"), 0, 0, 1, 1)

        # two buttons that will be used later in a method

        self.fullscreen_button = builder.get_object("fullscreen_button")

        self.leave_fullscreen_button = builder.get_object(

            "leave_fullscreen_button")

        # create the actions that control the window, connect their signal to a

        # callback method (see below), add the action to the window:

        # undo

        undo_action = Gio.SimpleAction.new("undo", None)

        undo_action.connect("activate", self.undo_callback)

        self.add_action(undo_action)

        # and fullscreen

        fullscreen_action = Gio.SimpleAction.new("fullscreen", None)

        fullscreen_action.connect("activate", self.fullscreen_callback)

        self.add_action(fullscreen_action)

    # callback for undo

    def undo_callback(self, action, parameter):

        print("You clicked \"Undo\".")

    # callback for fullscreen

    def fullscreen_callback(self, action, parameter):

        # check if the state is the same as Gdk.WindowState.FULLSCREEN, which

        # is a bit flag

        is_fullscreen = self.get_window().get_state(

        ) & Gdk.WindowState.FULLSCREEN != 0

        if is_fullscreen:

            self.unfullscreen()

            self.leave_fullscreen_button.hide()

            self.fullscreen_button.show()

        else:

            self.fullscreen()

            self.fullscreen_button.hide()

            self.leave_fullscreen_button.show()

class MyApplication(Gtk.Application):

    def __init__(self):

        Gtk.Application.__init__(self)

    def do_activate(self):

        win = MyWindow(self)

        # show the window - with show() not show_all() because that would show also

        # the leave_fullscreen button

        win.show()

    def do_startup(self):

        Gtk.Application.do_startup(self)

        # actions that control the application: create, connect their signal to a

        # callback method (see below), add the action to the application

        # new

        new_action = Gio.SimpleAction.new("new", None)

        new_action.connect("activate", self.new_callback)

        app.add_action(new_action)

        # open

        open_action = Gio.SimpleAction.new("open", None)

        open_action.connect("activate", self.open_callback)

        app.add_action(open_action)

    # callback for new

    def new_callback(self, action, parameter):

        print("You clicked \"New\".")

    # callback for open

    def open_callback(self, action, parameter):

        print("You clicked \"Open\".")

app = MyApplication()

exit_status = app.run(sys.argv)

sys.exit(exit_status)