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Side by Side Diff: ui/gfx/display_change_notifier.h

Issue 1964153002: Move Screen, its impls, DisplayObserver and DisplayChangeNotifier to ui/display (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 7 months ago
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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_GFX_DISPLAY_CHANGE_NOTIFIER_H_
6 #define UI_GFX_DISPLAY_CHANGE_NOTIFIER_H_
7
8 #include <vector>
9
10 #include "base/macros.h"
11 #include "base/observer_list.h"
12 #include "ui/gfx/gfx_export.h"
13
14 namespace gfx {
15
16 class Display;
17 class DisplayObserver;
18
19 // DisplayChangeNotifier is a class implementing the handling of DisplayObserver
20 // notification for Screen.
21 class GFX_EXPORT DisplayChangeNotifier {
22 public:
23 DisplayChangeNotifier();
24 ~DisplayChangeNotifier();
25
26 void AddObserver(DisplayObserver* observer);
27
28 void RemoveObserver(DisplayObserver* observer);
29
30 void NotifyDisplaysChanged(const std::vector<Display>& old_displays,
31 const std::vector<Display>& new_displays);
32
33 private:
34 // The observers that need to be notified when a display is modified, added
35 // or removed.
36 base::ObserverList<DisplayObserver> observer_list_;
37
38 DISALLOW_COPY_AND_ASSIGN(DisplayChangeNotifier);
39 };
40
41 } // namespace gfx
42
43 #endif // UI_GFX_DISPLAY_CHANGE_NOTIFIER_H_
44
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