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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef APP_ACTIVE_WINDOW_WATCHER_X_H_ | 5 #ifndef UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ |
6 #define APP_ACTIVE_WINDOW_WATCHER_X_H_ | 6 #define UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <gdk/gdk.h> | 9 #include <gdk/gdk.h> |
10 | 10 |
11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
12 #include "base/observer_list.h" | 12 #include "base/observer_list.h" |
13 #include "base/singleton.h" | 13 #include "base/singleton.h" |
14 | 14 |
| 15 namespace ui { |
| 16 |
15 // This is a helper class that is used to keep track of which window the X | 17 // This is a helper class that is used to keep track of which window the X |
16 // window manager thinks is active. Add an Observer to listener for changes to | 18 // window manager thinks is active. Add an Observer to listener for changes to |
17 // the active window. | 19 // the active window. |
18 class ActiveWindowWatcherX { | 20 class ActiveWindowWatcherX { |
19 public: | 21 public: |
20 class Observer { | 22 class Observer { |
21 public: | 23 public: |
22 // |active_window| will be NULL if the active window isn't one of Chrome's. | 24 // |active_window| will be NULL if the active window isn't one of Chrome's. |
23 virtual void ActiveWindowChanged(GdkWindow* active_window) = 0; | 25 virtual void ActiveWindowChanged(GdkWindow* active_window) = 0; |
24 | 26 |
(...skipping 21 matching lines...) Expand all Loading... |
46 // Callback for PropertyChange XEvents. | 48 // Callback for PropertyChange XEvents. |
47 static GdkFilterReturn OnWindowXEvent(GdkXEvent* xevent, | 49 static GdkFilterReturn OnWindowXEvent(GdkXEvent* xevent, |
48 GdkEvent* event, | 50 GdkEvent* event, |
49 gpointer window_watcher); | 51 gpointer window_watcher); |
50 | 52 |
51 ObserverList<Observer> observers_; | 53 ObserverList<Observer> observers_; |
52 | 54 |
53 DISALLOW_COPY_AND_ASSIGN(ActiveWindowWatcherX); | 55 DISALLOW_COPY_AND_ASSIGN(ActiveWindowWatcherX); |
54 }; | 56 }; |
55 | 57 |
56 #endif // APP_ACTIVE_WINDOW_WATCHER_X_H_ | 58 } // namespace ui |
| 59 |
| 60 #endif // UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ |
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