From 60225ef86d070a7999bd6cded43837ca87d3f24f Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <llandwerlin@gmail.com>
Date: Wed, 26 Jun 2013 14:47:33 +0100
Subject: [PATCH] screenShield: fix empty screen shield

If the drag action ends after something else has put the screen shield
into a different state we can end up in an inconsistent screen shield
state where the whole thing is empty.

https://bugzilla.gnome.org/show_bug.cgi?id=703126
---
 js/ui/screenShield.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index fe9cd31dc..4264f01b7 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -709,6 +709,8 @@ const ScreenShield = new Lang.Class({
     },
 
     _onDragEnd: function(action, actor, eventX, eventY, modifiers) {
+        if (this._lockScreenState != MessageTray.State.HIDING)
+            return;
         if (this._lockScreenGroup.y < -(ARROW_DRAG_THRESHOLD * global.stage.height)) {
             // Complete motion automatically
 	    let [velocity, velocityX, velocityY] = this._dragAction.get_velocity(0);