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// Copyright 2014 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_GFX_DISPLAY_CHANGE_NOTIFIER_H_
#define UI_GFX_DISPLAY_CHANGE_NOTIFIER_H_
#include <vector>
#include "base/macros.h"
#include "base/observer_list.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
class Display;
class DisplayObserver;
// DisplayChangeNotifier is a class implementing the handling of DisplayObserver
// notification for Screen.
class GFX_EXPORT DisplayChangeNotifier {
public:
DisplayChangeNotifier();
~DisplayChangeNotifier();
void AddObserver(DisplayObserver* observer);
void RemoveObserver(DisplayObserver* observer);
void NotifyDisplaysChanged(const std::vector<Display>& old_displays,
const std::vector<Display>& new_displays);
private:
// The observers that need to be notified when a display is modified, added
// or removed.
base::ObserverList<DisplayObserver> observer_list_;
DISALLOW_COPY_AND_ASSIGN(DisplayChangeNotifier);
};
} // namespace gfx
#endif // UI_GFX_DISPLAY_CHANGE_NOTIFIER_H_
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