From 7f74968cef73660cf87a1c762ef373b8288eb595 Mon Sep 17 00:00:00 2001
From: jules <jules@rawmaterialsoftware.com>
Date: Tue, 3 Jul 2012 20:47:06 +0100
Subject: [PATCH] Added a new callback
 ValueTree::Listener::valueTreeRedirected()

---
 modules/juce_data_structures/values/juce_ValueTree.cpp | 8 ++------
 modules/juce_data_structures/values/juce_ValueTree.h   | 7 ++++++-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/modules/juce_data_structures/values/juce_ValueTree.cpp b/modules/juce_data_structures/values/juce_ValueTree.cpp
index b41596c378..19cbcaf1a9 100644
--- a/modules/juce_data_structures/values/juce_ValueTree.cpp
+++ b/modules/juce_data_structures/values/juce_ValueTree.cpp
@@ -663,6 +663,8 @@ ValueTree& ValueTree::operator= (const ValueTree& other)
     }
 
     object = other.object;
+
+    listeners.call (&ValueTree::Listener::valueTreeRedirected, *this);
     return *this;
 }
 
@@ -671,12 +673,6 @@ ValueTree::ValueTree (ValueTree&& other) noexcept
     : object (static_cast <SharedObject::Ptr&&> (other.object))
 {
 }
-
-ValueTree& ValueTree::operator= (ValueTree&& other) noexcept
-{
-    object = static_cast <SharedObject::Ptr&&> (other.object);
-    return *this;
-}
 #endif
 
 ValueTree::~ValueTree()
diff --git a/modules/juce_data_structures/values/juce_ValueTree.h b/modules/juce_data_structures/values/juce_ValueTree.h
index d818c71518..a9ba3a03e7 100644
--- a/modules/juce_data_structures/values/juce_ValueTree.h
+++ b/modules/juce_data_structures/values/juce_ValueTree.h
@@ -93,7 +93,6 @@ public:
 
    #if JUCE_COMPILER_SUPPORTS_MOVE_SEMANTICS
     ValueTree (ValueTree&& other) noexcept;
-    ValueTree& operator= (ValueTree&& other) noexcept;
    #endif
 
     /** Destructor. */
@@ -412,6 +411,12 @@ public:
             the listener is registered, and not to any of its children.
         */
         virtual void valueTreeParentChanged (ValueTree& treeWhoseParentHasChanged) = 0;
+
+        /** This method is called when a tree is made to point to a different internal shared object.
+            When operator= is used to make a ValueTree refer to a different object, this callback
+            will be made.
+        */
+        virtual void valueTreeRedirected (ValueTree& treeWhichHasBeenChanged) {}
     };
 
     /** Adds a listener to receive callbacks when this node is changed.