Krzysztof Magrel wrote:

>How can I run my project (in gtk+) on full screen? It means I want to
>maximize window of project. I can of course maximize it "by heand" after
>application run. But I want my application do it itself on the start (of
>course size of the window will depend of resolution (640x480,  800x600,
>1024x768 etc.)). How function should I use ? Please help.
>

For the same purpose, I wrote that (note sure this is the simplest way):

/*--------------------------------------------------------------------*/
  /* GTK init */
  gtk_init (&argc, &argv);

  /* Colors init */
  gdk_rgb_init ();
  gtk_widget_set_default_colormap (gdk_rgb_get_cmap ());
  gtk_widget_set_default_visual (gdk_rgb_get_visual ());
 
  /* Let's create the top level window */
  main_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

  /* A good name for the window */
  gtk_widget_set_name (main_window, "foobar");

  /* Maximum size for the window (that of the screen) */
  gtk_widget_set_usize (main_window, gdk_screen_width(), 
gdk_screen_height());

  /* Not resizable! */
  gtk_window_set_policy (GTK_WINDOW (main_window), FALSE, FALSE, FALSE);

  /* WM hints */
  gtk_window_set_wmclass (GTK_WINDOW (main_window), "Foobar", "foobar");

  /* When we get the destroy message we exit */
  gtk_signal_connect (GTK_OBJECT (main_window), "destroy",
                      GTK_SIGNAL_FUNC (gtk_exit), NULL);
  gtk_signal_connect (GTK_OBJECT (main_window), "delete_event",
                      GTK_SIGNAL_FUNC (gtk_exit), NULL);

  /* We suppress any window decoration (must be after "realize") */
  gtk_widget_realize (main_window);
  gdk_window_set_decorations (main_window->window, 0);
/*--------------------------------------------------------------------*/

Hope it helps...


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