[gtk+] quartz: add virtual modifiers already in GDK, just as X11 does it

[Michael Natterer <mitch src gnome org>]

commit 0ea1924494393859d27eca3d8180adbbaa418b08
Author: Michael Natterer <mitch lanedo com>
Date:   Thu Jan 19 16:12:11 2012 +0100

    quartz: add virtual modifiers already in GDK, just as X11 does it
    
    Key event states  will now always contain GDK_META_MASK in addition
    to GDK_MOD2_MASK.
    (cherry picked from commit d915d17ff66be926616565865f941289d8a1024b)

 gdk/quartz/gdkevents-quartz.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gdk/quartz/gdkevents-quartz.c b/gdk/quartz/gdkevents-quartz.c
index 3528f35..67934c5 100644
--- a/gdk/quartz/gdkevents-quartz.c
+++ b/gdk/quartz/gdkevents-quartz.c
@@ -963,6 +963,13 @@ fill_key_event (GdkWindow    *window,
 
   event->key.state |= _gdk_quartz_events_get_current_mouse_modifiers ();
 
+  /* The X11 backend adds the first virtual modifier MOD2..MOD5 are
+   * mapped to. Since we only have one virtual modifier in the quartz
+   * backend, calling the standard function will do.
+   */
+  gdk_keymap_add_virtual_modifiers (gdk_keymap_get_for_display (_gdk_display),
+                                    &event->key.state);
+
   event->key.string = NULL;
 
   /* Fill in ->string since apps depend on it, taken from the x11 backend. */