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// Copyright 2013 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_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_H_
#define CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_H_
#include "base/basictypes.h"
// The controller receives the raw y-deltas generated by the overscroll
// controller and is resonsible for converting them in to the scroll end
// effect. This effect occurs in the vertical overscroll case and is used to
// visually indicate to the user that they have reached the end of the content
// that they are scrolling.
class ScrollEndEffectController {
public:
ScrollEndEffectController() {}
virtual ~ScrollEndEffectController() {}
static ScrollEndEffectController* Create();
// Interface that allows vertical overscroll activies to be communicated to
// the controller.
virtual void OverscrollUpdate(int delta_y) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(ScrollEndEffectController);
};
#endif // CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_H_
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