View synchronization

mojo/services/public/cpp/view_manager/view_tree_node.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_TREE_NODE_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_TREE_NODE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
 #include "mojo/services/public/cpp/view_manager/view_manager_types.h"
 
 namespace mojo {
 namespace services {
 namespace view_manager {
 
+class View;
 class ViewManager;
 class ViewTreeNodeObserver;
 
 // ViewTreeNodes are owned by the ViewManager.
 // TODO(beng): Right now, you'll have to implement a ViewTreeNodeObserver to
 //             track destruction and NULL any pointers you have.
 //             Investigate some kind of smart pointer or weak pointer for these.
 class ViewTreeNode {
  public:
   typedef std::vector<ViewTreeNode*> Children;
@@ skipping 15 matching lines @@
   const ViewTreeNode* parent() const { return parent_; }
   const Children& children() const { return children_; }
 
   void AddChild(ViewTreeNode* child);
   void RemoveChild(ViewTreeNode* child);
 
   bool Contains(ViewTreeNode* child) const;
 
   ViewTreeNode* GetChildById(TransportNodeId id);
 
+  // View.
+  void SetActiveView(View* view);
+  View* active_view() { return active_view_; }
+
  protected:
   // This class is subclassed only by test classes that provide a public ctor.
   ViewTreeNode();
   ~ViewTreeNode();
 
  private:
   friend class ViewTreeNodePrivate;
 
   explicit ViewTreeNode(ViewManager* manager);
 
   void LocalDestroy();
   void LocalAddChild(ViewTreeNode* child);
   void LocalRemoveChild(ViewTreeNode* child);
+  void LocalSetActiveView(View* view);
 
   ViewManager* manager_;
   TransportNodeId id_;
   ViewTreeNode* parent_;
   Children children_;
 
   ObserverList<ViewTreeNodeObserver> observers_;
 
+  View* active_view_;
+
   DISALLOW_COPY_AND_ASSIGN(ViewTreeNode);
 };
 
 }  // namespace view_manager
 }  // namespace services
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_TREE_NODE_H_