[empathy] CallWindow: hide the preview while dragging it

[Emilio Pozuelo Monfort <epm src gnome org>]

commit 33dab5dcf04b0f979c91e65373c9a7d89da014b3
Author: Emilio Pozuelo Monfort <emilio pozuelo collabora co uk>
Date:   Thu Aug 18 12:34:05 2011 +0100

    CallWindow: hide the preview while dragging it
    
    We show a clone of it moving through the stage, so there's no
    point in showing the main preview at the same time.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=656573

 src/empathy-call-window.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/empathy-call-window.c b/src/empathy-call-window.c
index 825aa0e..c13b11b 100644
--- a/src/empathy-call-window.c
+++ b/src/empathy-call-window.c
@@ -891,6 +891,8 @@ empathy_call_window_preview_on_drag_begin_cb (ClutterDragAction *action,
 
   clutter_drag_action_set_drag_handle (action, preview);
 
+  clutter_actor_set_opacity (actor, 0);
+
   empathy_call_window_show_preview_rectangles (self, TRUE);
   empathy_call_window_darken_preview_rectangles (self);
 }
@@ -914,6 +916,8 @@ empathy_call_window_preview_on_drag_end_cb (ClutterDragAction *action,
   /* Destroy the video preview copy that we were dragging */
   clutter_actor_destroy (preview);
 
+  clutter_actor_set_opacity (actor, 255);
+
   if (pos != PREVIEW_POS_NONE)
     empathy_call_window_move_video_preview (self, pos);