blob: 5c61896bd76182b717fb85f6bb77c7488ca7f6a5 [file] [log] [blame]
// 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_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_
#define UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_
#include <vector>
#include "base/macros.h"
#include "base/observer_list.h"
#include "ui/display/display_export.h"
namespace display {
class Display;
class DisplayObserver;
// DisplayChangeNotifier is a class implementing the handling of DisplayObserver
// notification for Screen.
class DISPLAY_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>::Unchecked observer_list_;
DISALLOW_COPY_AND_ASSIGN(DisplayChangeNotifier);
};
} // namespace display
#endif // UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_