mojo/services/view_manager/node_delegate.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MOJO_SERVICES_VIEW_MANAGER_NODE_DELEGATE_H_
   6 #define MOJO_SERVICES_VIEW_MANAGER_NODE_DELEGATE_H_
   7
   8 #include "mojo/services/view_manager/view_manager_export.h"
   9
  10 namespace gfx {
  11 class Rect;
  12 }
  13
  14 namespace mojo {
  15 namespace service {
  16
  17 class Node;
  18
  19 class MOJO_VIEW_MANAGER_EXPORT NodeDelegate {
  20  public:
  21   // Invoked at the end of the Node's destructor (after it has been removed from
  22   // the hierarchy and its active view has been reset).
  23   virtual void OnNodeDestroyed(const Node* node) = 0;
  24
  25   // Invoked when the hierarchy has changed.
  26   virtual void OnNodeHierarchyChanged(const Node* node,
  27                                       const Node* new_parent,
  28                                       const Node* old_parent) = 0;
  29
  30   virtual void OnNodeBoundsChanged(const Node* node,
  31                                    const gfx::Rect& old_bounds,
  32                                    const gfx::Rect& new_bounds) = 0;
  33
  34  protected:
  35   virtual ~NodeDelegate() {}
  36 };
  37
  38 }  // namespace service
  39 }  // namespace mojo
  40
  41 #endif  // MOJO_SERVICES_VIEW_MANAGER_NODE_DELEGATE_H_