Re: Get GtkWindow focus from XI Event

[Rui Tiago Cação Matos <tiagomatos gmail com>]

Hi,

On Thu, May 11, 2017 at 2:24 PM, Takao Fujiwara <tfujiwar redhat com> wrote:
> I have a focus problem with the attached program.
> 1. When press Ctrl-Alt-v, my window is launched with the keyboard focus.
> 2. Click [x] button and close the window.
> 3. When press Ctrl-Alt-v again, my window is launched but the focus status
> is different by desktop.
>
> XFCE4 desktop can get the keyboard focus correctly.
> But GNOME, MATE or Plasma desktop cannot get the keyboard focus in the
> second Ctrl-Alt-v.

Basically you're hitting the window manager's focus stealing
prevention logic. See below how you can fix it:

> static void
> run_window ()
> {
>     GtkWidget *window;
>     GMainLoop *loop;
>
>     loop = g_main_loop_new (NULL, FALSE);
>     window = my_window_new (loop);
>     gtk_widget_show_all(window);

call gtk_window_present_with_time() here

>     g_main_loop_run (loop);
> }
>
> static void
> event_handler (GdkEvent *event,
>                gpointer  data)
> {
>     static int times = 0;
>     if (((GdkEventAny*)event)->window == gdk_get_default_root_window() &&
>          event->type == GDK_KEY_PRESS) {
>         guint keyval = ((GdkEventKey*)event)->keyval;
>         guint modifiers = ((GdkEventKey*)event)->state;
>         if (keyval >= GDK_KEY_A && keyval <= GDK_KEY_Z &&
>             (modifiers & GDK_SHIFT_MASK) != 0) {
>             keyval = keyval - GDK_KEY_A + GDK_KEY_a;
>         }
>         if (keyval == shortcut_keysym &&
>             modifiers == shortcut_modifiers) {

get the event timestamp here with gdk_event_get_time()

>             run_window ();
>             times++;
>             if (times > 1) {
>                 ungrab_keycode (keyval, modifiers);
>                 gtk_main_quit();
>             }
>         }
>     }
>     gtk_main_do_event (event);
> }


Rui