// Copyright (c) 2011 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_DESKTOP_OBSERVER_H_ #define UI_AURA_DESKTOP_OBSERVER_H_ #pragma once #include "ui/aura/aura_export.h" namespace gfx { class Size; } namespace aura { class Window; class AURA_EXPORT DesktopObserver { public: // Invoked after the desktop is resized. virtual void OnDesktopResized(const gfx::Size& new_size) {} // Invoked when a new window is initialized. virtual void OnWindowInitialized(Window* window) {} // Invoked when the active window is changed. |active| may be NULL if there is // not active window. virtual void OnActiveWindowChanged(Window* active) {} protected: virtual ~DesktopObserver() {} }; } // namespace aura #endif // UI_AURA_DESKTOP_OBSERVER_H_