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