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// Copyright (c) 2012 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 UI_AURA_ROOT_WINDOW_OBSERVER_H_
#define UI_AURA_ROOT_WINDOW_OBSERVER_H_
#pragma once

#include "ui/aura/aura_export.h"

namespace gfx {
class Size;
}

namespace aura {

class Window;

class AURA_EXPORT RootWindowObserver {
 public:
  // Invoked after the RootWindow is resized.
  virtual void OnRootWindowResized(const gfx::Size& new_size) {}

  // Invoked after the screen's work area insets changes.
  virtual void OnScreenWorkAreaInsetsChanged() {}

  // Invoked when a window is focused.
  virtual void OnWindowFocused(Window* window) {}

 protected:
  virtual ~RootWindowObserver() {}
};

}  // namespace aura

#endif  // UI_AURA_ROOT_WINDOW_OBSERVER_H_