gecko-dev/layout/generic/nsIScrollbarOwner.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsIScrollbarOwner_h___
#define nsIScrollbarOwner_h___
#include "nsQueryFrame.h"
class nsIDOMEventTarget;
class nsIFrame;
/**
* An interface that represents a frame which manages scrollbars.
*/
class nsIScrollbarOwner : public nsQueryFrame {
public:
NS_DECL_QUERYFRAME_TARGET(nsIScrollbarOwner)
/**
* Obtain the frame for the horizontal or vertical scrollbar, or null
* if there is no such box.
*/
virtual nsIFrame* GetScrollbarBox(bool aVertical) = 0;
/**
* Show or hide scrollbars on 2 fingers touch.
* Subclasses should call their ScrollbarActivity's corresponding methods.
*/
virtual void ScrollbarActivityStarted() const = 0;
virtual void ScrollbarActivityStopped() const = 0;
};
#endif