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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 COMPONENTS_ZOOM_ZOOM_OBSERVER_H_
#define COMPONENTS_ZOOM_ZOOM_OBSERVER_H_
#include "components/zoom/zoom_controller.h"
namespace zoom {
// Interface for objects that wish to be notified of changes in ZoomController.
class ZoomObserver {
public:
// Notification that the zoom percentage has changed.
virtual void OnZoomChanged(const ZoomController::ZoomChangedEventData& data) {
}
protected:
virtual ~ZoomObserver() {}
};
} // namespace zoom
#endif // COMPONENTS_ZOOM_ZOOM_OBSERVER_H_
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