From 762113230ada2e88a2771cee23620d271e98d70c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrg=20Lehni?= <juerg@scratchdisk.com>
Date: Thu, 25 Sep 2014 17:53:08 +0200
Subject: [PATCH] Implement Item#parentToLocal() and #localToParent()

As outlined in #530
---
 src/item/Item.js | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/src/item/Item.js b/src/item/Item.js
index 8842d39f..a2b7d909 100644
--- a/src/item/Item.js
+++ b/src/item/Item.js
@@ -2980,8 +2980,8 @@ var Item = Base.extend(Callback, /** @lends Item# */{
     },
 
     /**
-     * Converts the specified point from global project coordinates to local
-     * coordinates in relation to the the item's own coordinate space.
+     * Converts the specified point from global project coordinate space to the
+     * item's own local coordinate space.
      *
      * @param {Point} point the point to be transformed
      * @return {Point} the transformed point as a new instance
@@ -2992,8 +2992,8 @@ var Item = Base.extend(Callback, /** @lends Item# */{
     },
 
     /**
-     * Converts the specified point from local coordinates to global coordinates
-     * in relation to the the project coordinate space.
+     * Converts the specified point from the item's own local coordinate space
+     * to the global project coordinate space.
      *
      * @param {Point} point the point to be transformed
      * @return {Point} the transformed point as a new instance
@@ -3003,6 +3003,28 @@ var Item = Base.extend(Callback, /** @lends Item# */{
                 Point.read(arguments));
     },
 
+    /**
+     * Converts the specified point from the parent's coordinate space to
+     * item's own local coordinate space.
+     *
+     * @param {Point} point the point to be transformed
+     * @return {Point} the transformed point as a new instance
+     */
+    parentToLocal: function(/* point */) {
+        return this._matrix._inverseTransform(Point.read(arguments));
+    },
+
+    /**
+     * Converts the specified point from the item's own local coordinate space
+     * to the parent's coordinate space.
+     *
+     * @param {Point} point the point to be transformed
+     * @return {Point} the transformed point as a new instance
+     */
+    localToParent: function(/* point */) {
+        return this._matrix._transformPoint(Point.read(arguments));
+    },
+
     /**
      * Transform the item so that its {@link #bounds} fit within the specified
      * rectangle, without changing its aspect ratio.