| // Copyright 2014 The Chromium Authors |
| // 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/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(const DisplayChangeNotifier&) = delete; |
| DisplayChangeNotifier& operator=(const DisplayChangeNotifier&) = delete; |
| |
| ~DisplayChangeNotifier(); |
| |
| void AddObserver(DisplayObserver* observer); |
| |
| void RemoveObserver(DisplayObserver* observer); |
| |
| void NotifyDisplaysChanged(const std::vector<Display>& old_displays, |
| const std::vector<Display>& new_displays); |
| |
| void NotifyCurrentWorkspaceChanged(const std::string& workspace); |
| |
| private: |
| // The observers that need to be notified when a display is modified, added |
| // or removed. |
| base::ObserverList<DisplayObserver> observer_list_; |
| }; |
| |
| } // namespace display |
| |
| #endif // UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_ |