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// 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/base/ui_export.h"
namespace gfx {
class Display;
// Observers for display configuration changes.
// TODO(oshima): consolidate |WorkAreaWatcherObserver| and
// |DisplaySettingsProvier|. crbug.com/122863.
class UI_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_
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