1 // Copyright (c) 2011 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_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_ 6 #define UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_ 7 8 #include <gdk/gdk.h> 9 10 #include "ui/base/ui_export.h" 11 12 namespace ui { 13 14 class UI_EXPORT ActiveWindowWatcherXObserver { 15 public: 16 // |active_window| will be NULL if the active window isn't one of Chrome's. 17 virtual void ActiveWindowChanged(GdkWindow* active_window) = 0; 18 19 protected: 20 virtual ~ActiveWindowWatcherXObserver() {} 21 }; 22 23 } // namespace ui 24 25 #endif // UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_ 26
