[maemo-developers] Visibility events for widgets in Fremantle

[From: Henrik Hedberg]

    Hi,

    I am trying to track visibility changes for a widget 
(HDHomePluginItem) in Fremantle. For some reason this is not working:

HD_DEFINE_PLUGIN_MODULE(MaukuWidget, mauku_widget,
  HD_TYPE_HOME_PLUGIN_ITEM);

static gboolean on_visibility_notify_event(GtkWidget* widget,
  GdkEventVisibility* event, gpointer user_data) {
     return FALSE;
}

static void mauku_widget_init(MaukuWidget* mauku_widget) {
     g_signal_connect(mauku_widget, "visibility-notify-event",
      G_CALLBACK(on_visibility_notify_event), NULL);
     gtk_widget_add_events(GTK_WIDGET(mauku_widget),
      GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
      GDK_BUTTON_MOTION_MASK | GDK_VISIBILITY_NOTIFY_MASK);
}

The callback function is never called.

    Is this a bug in the window manager or in the X, expected behaviour, 
or am I just missing something?

    BR,

    Henrik

-- 
    Henrik Hedberg  -  http://www.henrikhedberg.net/