| // Copyright (c) 2012 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_OBSERVER_H_ |
| #define UI_GFX_DISPLAY_OBSERVER_H_ |
| |
| #include "ui/gfx/gfx_export.h" |
| |
| namespace gfx { |
| class Display; |
| |
| // Observers for display configuration changes. |
| // TODO(oshima): consolidate |WorkAreaWatcherObserver| and |
| // |DisplaySettingsProvier|. crbug.com/122863. |
| class GFX_EXPORT DisplayObserver { |
| public: |
| // Called when the |display|'s bound has changed. |
| virtual void OnDisplayBoundsChanged(const Display& display) = 0; |
| |
| // Called when |new_display| has been added. |
| virtual void OnDisplayAdded(const Display& new_display) = 0; |
| |
| // Called when |old_display| has been removed. |
| virtual void OnDisplayRemoved(const Display& old_display) = 0; |
| |
| protected: |
| virtual ~DisplayObserver(); |
| }; |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_DISPLAY_OBSERVER_H_ |