1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/generic/nsIScrollbarOwner.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,35 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsIScrollbarOwner_h___
1.10 +#define nsIScrollbarOwner_h___
1.11 +
1.12 +#include "nsQueryFrame.h"
1.13 +
1.14 +class nsIDOMEventTarget;
1.15 +class nsIFrame;
1.16 +
1.17 +/**
1.18 + * An interface that represents a frame which manages scrollbars.
1.19 + */
1.20 +class nsIScrollbarOwner : public nsQueryFrame {
1.21 +public:
1.22 + NS_DECL_QUERYFRAME_TARGET(nsIScrollbarOwner)
1.23 +
1.24 + /**
1.25 + * Obtain the frame for the horizontal or vertical scrollbar, or null
1.26 + * if there is no such box.
1.27 + */
1.28 + virtual nsIFrame* GetScrollbarBox(bool aVertical) = 0;
1.29 +
1.30 + /**
1.31 + * Show or hide scrollbars on 2 fingers touch.
1.32 + * Subclasses should call their ScrollbarActivity's corresponding methods.
1.33 + */
1.34 + virtual void ScrollbarActivityStarted() const = 0;
1.35 + virtual void ScrollbarActivityStopped() const = 0;
1.36 +};
1.37 +
1.38 +#endif
