// 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 CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_
#define CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_
#pragma once

#include "chrome/browser/ui/zoom/zoom_controller.h"

class TabContents;

// Interface for objects that wish to be notified of changes in ZoomController.
class ZoomObserver {
 public:
  // Notification that the Omnibox zoom icon should change.
  virtual void OnZoomIconChanged(TabContents* source,
                                 ZoomController::ZoomIconState state) = 0;

  // Notification that the zoom percentage has changed.
  virtual void OnZoomChanged(TabContents* source,
                             int zoom_percent,
                             bool can_show_bubble) = 0;

 protected:
  virtual ~ZoomObserver() {}
};

#endif  // CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_