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Re: Wait cursor animation does not work properly




On Sun, 2017-09-03 at 16:43 +0200, Stefan Salewski wrote:
> Since a few months I have observed that for my chess game the mouse
> pointer/cursor animation stopped working properly.

Well, I have added the g_idle_add() problem also.

When I move the mouse pointer the first time into the button widget,
animation works fine. But when I click on the button, animation stops
while idle function is active, which is 5 seconds. After that period
animation works fine again.

But when I move the pointer out of the window and back again, animation
is stopped and will not start again.

May that be a Wayland problem? I do not really think so, but I am not
really sure.

// gcc t.c `pkg-config --libs --cflags gtk+-3.0`

#include <gtk/gtk.h>
//include <glib/glib.h>
#include <glib/gprintf.h>
static gboolean
idle_func(gpointer data)
{
  int i;
  i = 0;
  while (i < 9)
  {
    g_usleep(1000000);
    i++;
    g_printf("busy\n");
  }
  return G_SOURCE_REMOVE;
}

static void
button_clicked (GtkButton *button,
                gpointer   user_data)
{
  const char *old_label;
  char *new_label;
  old_label = gtk_button_get_label (button);
  new_label = g_utf8_strreverse (old_label, -1);
  gtk_button_set_label (button, new_label);
  g_free (new_label);
  g_idle_add(idle_func, NULL);
}
static void
activate (GtkApplication *app,
          gpointer        user_data)
{
  GtkWidget *window;
  GtkWidget *button;
  GdkDisplay *display;
  GdkCursor *cursor;
  window = gtk_application_window_new (app);
  gtk_window_set_title (GTK_WINDOW (window), "GNOME Button");
  gtk_window_set_default_size (GTK_WINDOW (window), 250, 50);
  button = gtk_button_new_with_label ("Click Me");
  gtk_container_add (GTK_CONTAINER (window), button);
  g_signal_connect (GTK_BUTTON (button),
                    "clicked", 
                    G_CALLBACK (button_clicked), 
                    G_OBJECT (window));
  gtk_widget_show_all (window);
  display = gdk_display_get_default();
  cursor = gdk_cursor_new_from_name(display, "wait");
  gdk_window_set_cursor(gtk_widget_get_window(window), cursor);

}

int
main (int argc, char **argv)
{
  GtkApplication *app;
  int status;
  app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
  status = g_application_run (G_APPLICATION (app), argc, argv);
  g_object_unref (app);
  return status;
}
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