/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License.  You may obtain a copy of the License at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is Netscape Communications
 * Corporation.  Portions created by Netscape are Copyright (C) 1998
 * Netscape Communications Corporation.  All Rights Reserved.
 */

/**

  Eric D Vaughan
  This class lays out its children either vertically or horizontally
 
**/

#ifndef nsScrollbarButtonFrame_h___
#define nsScrollbarButtonFrame_h___

#include "nsTitledButtonFrame.h"
#include "nsITimerCallback.h"

class nsSliderFrame;

class nsScrollbarButtonFrame : public nsTitledButtonFrame, 
                               public nsITimerCallback
{
public:

  // Overrides
  NS_IMETHOD Destroy(nsIPresContext& aPresContext);

  friend nsresult NS_NewScrollBarButtonFrame(nsIFrame** aNewFrame);

  NS_IMETHOD HandleEvent(nsIPresContext& aPresContext, 
                         nsGUIEvent* aEvent,
                         nsEventStatus& aEventStatus);


  static nsresult GetChildWithTag(nsIAtom* atom, nsIFrame* start, nsIFrame*& result);
  static nsresult GetParentWithTag(nsIAtom* atom, nsIFrame* start, nsIFrame*& result);

   NS_IMETHOD HandlePress(nsIPresContext& aPresContext,
                         nsGUIEvent *    aEvent,
                         nsEventStatus&  aEventStatus);

  NS_IMETHOD HandleMultiplePress(nsIPresContext& aPresContext,
                         nsGUIEvent *    aEvent,
                         nsEventStatus&  aEventStatus)  { return NS_OK; }

  NS_IMETHOD HandleDrag(nsIPresContext& aPresContext,
                        nsGUIEvent *    aEvent,
                        nsEventStatus&  aEventStatus) { return NS_OK; }

  NS_IMETHOD HandleRelease(nsIPresContext& aPresContext,
                           nsGUIEvent *    aEvent,
                           nsEventStatus&  aEventStatus);

  virtual void Notify(nsITimer *timer);

  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
  NS_IMETHOD_(nsrefcnt) AddRef(void) { return NS_OK; }
  NS_IMETHOD_(nsrefcnt) Release(void) { return NS_OK; }


protected:
  virtual void MouseClicked(nsIPresContext& aPresContext);
  virtual void MouseClicked();

  
}; // class nsTabFrame



#endif

