From 6e4647c51468aa0358a0bed529998f957bec2bab Mon Sep 17 00:00:00 2001
From: Max <maxkfranz@gmail.com>
Date: Thu, 12 Feb 2015 15:04:47 -0500
Subject: [PATCH] possible fix for #819 w/ dagre and re-used layout

---
 src/core-layout.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/core-layout.js b/src/core-layout.js
index a13b7d1389..bbd8aa291b 100644
--- a/src/core-layout.js
+++ b/src/core-layout.js
@@ -3,8 +3,16 @@
   $$.fn.core({
     
     layout: function( params ){
-      var layout = this._private.prevLayout = ( params == null ? this._private.prevLayout : this.initLayout( params ) );
+      var layout;
 
+      // always use a new layout w/ init opts; slightly different backwards compatibility
+      // but fixes layout reuse issues like dagre #819 
+      if( params == null ){ 
+        params = $$.util.extend({}, this._private.options.layout);
+        params.eles = this.$();
+      }
+
+      layout = this.initLayout( params );
       layout.run();
 
       return this; // chaining