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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is Mozilla Communicator client code.
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 * Portions created by the Initial Developer are Copyright (C) 1998
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/**

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

#ifndef nsScrollbarButtonFrame_h___
#define nsScrollbarButtonFrame_h___

#include "nsButtonBoxFrame.h"
#include "nsITimerCallback.h"

class nsSliderFrame;

class nsScrollbarButtonFrame : public nsButtonBoxFrame, 
                               public nsITimerCallback
{
public:
  nsScrollbarButtonFrame(nsIPresShell* aPresShell);

  // Overrides
  NS_IMETHOD Destroy(nsIPresContext* aPresContext);

  friend nsresult NS_NewScrollBarButtonFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);

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


  static nsresult GetChildWithTag(nsIPresContext* aPresContext,
                                  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);

  NS_IMETHOD_(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, nsGUIEvent* aEvent);
  virtual void MouseClicked();

  
}; // class nsTabFrame



#endif