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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_ | |
| 6 #define CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_ | |
| 7 | |
| 8 #include "chrome/browser/ui/zoom/zoom_controller.h" | |
| 9 | |
| 10 namespace content { | |
| 11 class WebContents; | |
| 12 } | |
| 13 | |
| 14 // Interface for objects that wish to be notified of changes in ZoomController. | |
| 15 class ZoomObserver { | |
| 16 public: | |
| 17 // Notification that the zoom percentage has changed. | |
| 18 virtual void OnZoomChanged(const ZoomController::ZoomChangedEventData& data) { | |
| 19 } | |
| 20 | |
| 21 protected: | |
| 22 virtual ~ZoomObserver() {} | |
| 23 }; | |
| 24 | |
| 25 #endif // CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_ | |
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