Python GTK3 toolbar accelerator doesn't work

Question

I'm following the Python GTK+ 3 Tutorial, and the accelerators I'm putting for the toolbar actions don't work. Here's a program showing the problem, roughly based on that tutorial. There's a menu action with N shortcut and a toolbar action with X shortcut. Menu action's shorcut works, toolbar action's one doesn't, even though the actions are created identically.

from gi.repository import Gtk

UI_INFO = """
<ui>
  <menubar name='TestMenubar'>
    <menu action='FileMenu'>
      <menuitem action='MenuAction' />
    </menu>
  </menubar>
  <toolbar name='TestToolbar'>
    <toolitem action='ToolbarAction' />
  </toolbar>
</ui>
"""

class MyWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="Test")

        self.set_default_size(200, 100)

        action_group = Gtk.ActionGroup(name="test_actions")

        self.add_menu_action(action_group)
        self.add_toolbar_action(action_group)

        uimanager = self.create_ui_manager()
        uimanager.insert_action_group(action_group)

        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)

        menubar = uimanager.get_widget("/TestMenubar")
        box.pack_start(menubar, False, False, 0)

        toolbar = uimanager.get_widget("/TestToolbar")
        box.pack_start(toolbar, False, False, 0)

        self.add(box)

    def add_menu_action(self, action_group):
        action_filemenu = Gtk.Action(name="FileMenu", label="File")
        action_group.add_action(action_filemenu)


        action = Gtk.Action(name='MenuAction',
                            label="Menu action",
                            stock_id=Gtk.STOCK_NEW)
        action.connect('activate', self.on_menu_action)
        action_group.add_action_with_accel(action, 'N')

    def add_toolbar_action(self, action_group):
        action = Gtk.Action(name='ToolbarAction',
                            label="Press me",
                            stock_id=Gtk.STOCK_MEDIA_STOP)
        action.connect('activate', self.on_toolbar_action)
        action_group.add_action_with_accel(action, 'X')

    def on_menu_action(self, widget):
        print 'Menu action'

    def on_toolbar_action(self, widget):
        print 'Toolbar action'

    def create_ui_manager(self):
        uimanager = Gtk.UIManager()

        uimanager.add_ui_from_string(UI_INFO)

        self.add_accel_group(uimanager.get_accel_group())

        return uimanager

window = MyWindow()
window.connect("delete-event", Gtk.main_quit)
window.show_all()
Gtk.main()

How can I make pressing X shortcut invoke the callback?

(The reference for GTK+ 3 say that add_action_with_accel is deprecated, so there's surely a better way to create the accelerators, but the doc doesn't show the way, and I couldn't find a better tutorial.)

Answer 1

Faced with the same problem. I asked a similar question on gtk 3 programming specific to gedit plugins here. I found that the menubar shortcuts are the only ones that work. So just introduce a menu item which does exactly what your tool item does. Preserve your tool item in order to provide flexibility to the user, but do not assign it any shortcut. i.e. add_action, not add_action_with_accel would be enough to add it to the action group.