[gnome-shell] magnifier: Fix DND when the magnifier is active

[Florian Müllner <fmuellner src gnome org>]

commit 35b5cb9860f78c69520f76bb42aa4a03e7896e49
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Nov 17 11:08:24 2010 +0100

    magnifier: Fix DND when the magnifier is active
    
    Hide the zoom regions from pick so that they do not interfere with
    the picking done by DND in search for _delegate objects.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=634560

 js/ui/magnifier.js |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/magnifier.js b/js/ui/magnifier.js
index 472fdea..91a0e77 100644
--- a/js/ui/magnifier.js
+++ b/js/ui/magnifier.js
@@ -896,6 +896,9 @@ ZoomRegion.prototype = {
         this._magView = new St.Bin({ style_class: 'magnifier-zoom-region', x_fill: true, y_fill: true });
         global.stage.add_actor(this._magView);
 
+        // hide the magnified region from CLUTTER_PICK_ALL
+        Shell.util_set_hidden_from_pick (this._magView, true);
+
         // Append a Clutter.Group to clip the contents of the magnified view.
         let mainGroup = new Clutter.Group({ clip_to_allocation: true });
         this._magView.set_child(mainGroup);