From 746b87dfcb7dc2d5687720f661707672a0331661 Mon Sep 17 00:00:00 2001
From: sapics <gv.nishino@gmail.com>
Date: Tue, 12 May 2015 10:48:58 +0900
Subject: [PATCH] add comment and some code style fix

---
 src/shapes/group.class.js | 58 +++++++++++++++++++++++----------------
 1 file changed, 34 insertions(+), 24 deletions(-)

diff --git a/src/shapes/group.class.js b/src/shapes/group.class.js
index 88fee3d9095..2846fd1c85c 100644
--- a/src/shapes/group.class.js
+++ b/src/shapes/group.class.js
@@ -52,13 +52,18 @@
      * Constructor
      * @param {Object} objects Group objects
      * @param {Object} [options] Options object
+     * @param {Boolean} [alreadyGrouped] if true, objects have been grouped already.
      * @return {Object} thisArg
      */
-    initialize: function(objects, options, skipPropagation) {
+    initialize: function(objects, options, alreadyGrouped) {
       options = options || { };
 
       this._objects = [];
-      skipPropagation && this.callSuper('initialize', options);
+      // if objects enclosed in a group have been grouped already,
+      // we cannot change properties of objects.
+      // Thus we need to set options to group without objects,
+      // because delegatedProperties propagate to objects.
+      alreadyGrouped && this.callSuper('initialize', options);
 
       this._objects = objects || [];
       for (var i = this._objects.length; i--; ) {
@@ -74,18 +79,16 @@
         this.originY = options.originY;
       }
 
-      if (!skipPropagation) {
+      if (alreadyGrouped) {
+        // do not change coordinate of objects enclosed in a group,
+        // because objects coordinate system have been group coodinate system already.
+        this._updateObjectsCoords(true);
+      }
+      else {
         this._calcBounds();
         this._updateObjectsCoords();
         this.callSuper('initialize', options);
       }
-      else {
-        for (i = this._objects.length; i--; ) {
-          this._objects[i].setCoords();
-          this._objects[i].__origHasControls = this._objects[i].hasControls;
-          this._objects[i].hasControls = false;
-        }
-      }
 
       this.setCoords();
       this.saveCoords();
@@ -93,25 +96,32 @@
 
     /**
      * @private
+     * @param {Boolean} [unchangeCoords] if true, coordinates of objects enclosed in a group do not change
      */
-    _updateObjectsCoords: function() {
-      this.forEachObject(this._updateObjectCoords, this);
+    _updateObjectsCoords: function(unchangeCoords) {
+      for (var i = this._objects.length; i--; ){
+        this._updateObjectCoords(this._objects[i], unchangeCoords);
+      }
     },
 
     /**
      * @private
-     */
-    _updateObjectCoords: function(object) {
-      var objectLeft = object.getLeft(),
-          objectTop = object.getTop(),
-          center = this.getCenterPoint();
-
-      object.set({
-        originalLeft: objectLeft,
-        originalTop: objectTop,
-        left: objectLeft - center.x,
-        top: objectTop - center.y
-      });
+     * @param {Object} object
+     * @param {Boolean} [unchangeCoords] if true, coordinates of object dose not change
+     */
+    _updateObjectCoords: function(object, unchangeCoords) {
+      if (!unchangeCoords) {
+        var objectLeft = object.getLeft(),
+            objectTop = object.getTop(),
+            center = this.getCenterPoint();
+
+        object.set({
+          originalLeft: objectLeft,
+          originalTop: objectTop,
+          left: objectLeft - center.x,
+          top: objectTop - center.y
+        });
+      }
 
       object.setCoords();