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Ciao,
Emmanuele.
On 11 May 2017 at 13:15, Takao Fujiwara <tfuji...@redhat.com> wrote:
> On 05/11/17 20:55, Takao Fujiwara-san 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 MATE or Plasma desktop cannot get the keyboard focus in the second
>> Ctrl-Alt-v.
>
>
> I also observe this problem in GNOME desktop.
>
>
>>
>> How should I investigate it?
>> The current workaround is to close the second window and launch the third
>> window by the program but not XI shortcut key.
>>
>> Thanks,
>> Fujiwara
>>
>> ---------
>> // gcc -o a a.c `pkg-config --cflags --libs gtk+-3.0 x11 xi`
>> #include <gtk/gtk.h>
>> #include <gdk/gdkx.h>
>> #include <X11/extensions/XInput2.h>
>> #include <string.h>
>>
>> guint shortcut_keysym = 0;
>> guint shortcut_modifiers = 0;
>>
>> static void
>> loop_quit (GtkWindow *window,
>> gpointer data)
>> {
>> GMainLoop *loop = data;
>> g_return_if_fail (loop != NULL);
>> gtk_widget_hide (GTK_WIDGET (window));
>> while (gtk_events_pending ()) {
>> gtk_main_iteration ();
>> }
>> g_main_loop_quit (loop);
>> }
>>
>> GtkWidget *
>> my_window_new (GMainLoop *loop) {
>> GtkWidget *window=gtk_window_new (GTK_WINDOW_TOPLEVEL);
>> gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
>> gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
>> g_signal_connect(window, "destroy", G_CALLBACK(loop_quit), loop);
>>
>> GtkWidget *entry = gtk_entry_new ();
>>
>> GtkWidget *grid=gtk_grid_new();
>> gtk_grid_attach(GTK_GRID(grid), entry, 0, 0, 1, 1);
>>
>> gtk_container_add(GTK_CONTAINER(window), grid);
>>
>> return window;
>> }
>>
>> static XIGrabModifiers *
>> get_grab_modifiers (guint modifiers,
>> int *result_length)
>> {
>> XIGrabModifiers *ximodifiers = g_new0 (XIGrabModifiers, 1);
>> XIGrabModifiers ximodifier = { 0, };
>> memset (&ximodifier, 0, sizeof (XIGrabModifiers));
>> ximodifier.modifiers = modifiers;
>> ximodifier.status = 0;
>> ximodifiers[0] = ximodifier;
>> if (result_length)
>> *result_length = 1;
>> return ximodifiers;
>> }
>>
>> static void
>> grab_keycode (guint keysym,
>> guint modifiers)
>> {
>> GdkDisplay *display = gdk_display_get_default ();
>> Display *xdisplay = gdk_x11_display_get_xdisplay (display);
>> guint keycode = 0;
>> XIEventMask evmask = { 0, };
>> int length = 0;
>> XIGrabModifiers *ximodifiers;
>>
>> keycode = XKeysymToKeycode (xdisplay, keysym);
>> memset (&evmask, 0, sizeof (XIEventMask));
>> evmask.deviceid = XIAllMasterDevices;
>> evmask.mask = g_new0 (guchar, (XI_LASTEVENT + 7) / 8);
>> evmask.mask_len = (XI_LASTEVENT + 7) / 8;
>> XISetMask (evmask.mask, XI_KeyPress);
>> XISetMask (evmask.mask, XI_KeyRelease);
>> ximodifiers = get_grab_modifiers (modifiers, &length);
>> XIGrabKeycode (xdisplay,
>> XIAllMasterDevices,
>> keycode,
>> DefaultRootWindow (xdisplay),
>> GrabModeAsync,
>> GrabModeAsync,
>> TRUE,
>> &evmask,
>> length,
>> ximodifiers);
>> g_free (ximodifiers);
>> }
>>
>> static void
>> ungrab_keycode (guint keysym,
>> guint modifiers)
>> {
>> GdkDisplay *display = gdk_display_get_default ();
>> Display *xdisplay = gdk_x11_display_get_xdisplay (display);
>> guint keycode = 0;
>> int length = 0;
>> XIGrabModifiers *ximodifiers;
>>
>> keycode = XKeysymToKeycode (xdisplay, keysym);
>> ximodifiers = get_grab_modifiers (modifiers, &length);
>> XIUngrabKeycode (xdisplay,
>> XIAllMasterDevices,
>> keycode,
>> DefaultRootWindow (xdisplay),
>> length,
>> ximodifiers);
>> g_free (ximodifiers);
>> }
>>
>> 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);
>>
>> 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) {
>> run_window ();
>> times++;
>> if (times > 1) {
>> ungrab_keycode (keyval, modifiers);
>> gtk_main_quit();
>> }
>> }
>> }
>> gtk_main_do_event (event);
>> }
>>
>> int
>> main (int argc, char *argv[])
>> {
>>
>> GtkWidget *window;
>> GMainLoop *loop;
>> gtk_init (&argc, &argv);
>>
>> gdk_event_handler_set (event_handler, NULL, NULL);
>>
>> gtk_accelerator_parse ("<Control><Alt>v",
>> &shortcut_keysym,
>> &shortcut_modifiers);
>> grab_keycode (shortcut_keysym, shortcut_modifiers);
>>
>> gtk_main();
>> return 0;
>> }
>>
>
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