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#ifndef nsScrollbar_h__
#define nsScrollbar_h__

#include "nsISupportsUtils.h"
#include "nsdefs.h"
#include "nsWindow.h"
#include "nsSwitchToUIThread.h"

#include "nsIScrollbar.h"

#include <ScrollBar.h>

class nsScrollbarBeOS;

/**
 * Native BeOS scrollbar wrapper. 
 */

class nsScrollbar : public nsWindow,
                    public nsIScrollbar
{

    // nsISupports
    NS_DECL_ISUPPORTS

public:
                            nsScrollbar(PRBool aIsVertical);
    virtual                 ~nsScrollbar();

    NS_IMETHOD Destroy(void);
    // nsIScrollBar implementation
    NS_IMETHOD SetMaxRange(PRUint32 aEndRange);
    NS_IMETHOD GetMaxRange(PRUint32& aMaxRange);
    NS_IMETHOD SetPosition(PRUint32 aPos);
    NS_IMETHOD GetPosition(PRUint32& aPos);
    NS_IMETHOD SetThumbSize(PRUint32 aSize);
    NS_IMETHOD GetThumbSize(PRUint32& aSize);
    NS_IMETHOD SetLineIncrement(PRUint32 aSize);
    NS_IMETHOD GetLineIncrement(PRUint32& aSize);
    NS_IMETHOD SetParameters(PRUint32 aMaxRange, PRUint32 aThumbSize,
                               PRUint32 aPosition, PRUint32 aLineIncrement);

    virtual PRBool    OnPaint(nsRect &r);
	virtual PRBool    OnScroll();
    virtual PRBool    OnResize(nsRect &aWindowRect);
    NS_IMETHOD        GetBounds(nsRect &aRect);

protected:
	nsScrollbarBeOS	*mScrollbar;
	BView		*CreateBeOSView();
    int			mLineIncrement;
    float		mScaleFactor;
	int32		thumb;
	orientation	mOrientation;
};

class nsScrollbarBeOS : public BScrollBar, public nsIWidgetStore
{
  bool first;
  float		sbpos;
  bool		sbposchanged;

  public:
    nsScrollbarBeOS( nsIWidget *aWidgetWindow, BRect aFrame, const char *aName,
        BView *aTarget, float aMin, float aMax, orientation aOrientation );
	void	ValueChanged(float newValue);
	bool	GetPosition(int32 &p);
};

#endif // nsButton_h__