From 233c3a357a1af50f80c232492ad6850d25fc16e5 Mon Sep 17 00:00:00 2001
From: Luke Murray <Luke.Murray@serraview.com>
Date: Fri, 12 Jul 2013 16:51:56 +1000
Subject: [PATCH] Add the option for a zoom handler callback

---
 src/drawer.js  | 5 ++++-
 src/overlay.js | 5 +++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/drawer.js b/src/drawer.js
index a5cc8ac9..10281190 100644
--- a/src/drawer.js
+++ b/src/drawer.js
@@ -430,7 +430,10 @@ $.Drawer.prototype = {
             $.OverlayPlacement[overlay.placement.toUpperCase()]
         );
     }else{
-        return new $.Overlay( element, rect );
+        var newOverlay = new $.Overlay(element, rect);
+        if (overlay.zoomHandler)
+            newOverlay.zoomHandler = overlay.zoomHandler;
+        return newOverlay;
     }
 
 }
diff --git a/src/overlay.js b/src/overlay.js
index d175eb7c..acee3316 100644
--- a/src/overlay.js
+++ b/src/overlay.js
@@ -176,6 +176,11 @@
                 this.size = $.getElementSize( element );
             }
 
+            if (this.zoomHandler) {
+                this.zoomHandler(this.position, this.size, element);
+                return;
+            }
+
             position = this.position;
             size     = this.size;