ui/aura/window_tree_host_observer.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 UI_AURA_WINDOW_TREE_HOST_OBSERVER_H_
   6 #define UI_AURA_WINDOW_TREE_HOST_OBSERVER_H_
   7
   8 #include "ui/aura/aura_export.h"
   9
  10 namespace gfx {
  11 class Point;
  12 }
  13
  14 namespace aura {
  15 class Window;
  16 class WindowTreeHost;
  17
  18 class AURA_EXPORT WindowTreeHostObserver {
  19  public:
  20   // Called when the host's client size has changed.
  21   virtual void OnHostResized(const WindowTreeHost* host) {}
  22
  23   // Called when the host is moved on screen.
  24   virtual void OnHostMoved(const WindowTreeHost* host,
  25                            const gfx::Point& new_origin) {}
  26
  27   // Called when the native window system sends the host request to close.
  28   virtual void OnHostCloseRequested(const WindowTreeHost* host) {}
  29
  30  protected:
  31   virtual ~WindowTreeHostObserver() {}
  32 };
  33
  34 }  // namespace aura
  35
  36 #endif  // UI_AURA_WINDOW_TREE_HOST_OBSERVER_H_