// @(#)root/hist:$Name:  $:$Id: TVirtualHistPainter.h,v 1.8 2002/08/13 21:17:58 brun Exp $
// Author: Rene Brun   30/08/99

/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
#ifndef ROOT_TVirtualHistPainter
#define ROOT_TVirtualHistPainter


//////////////////////////////////////////////////////////////////////////
//                                                                      //
// TVirtualHistPainter                                                  //
//                                                                      //
// Abstract base class for Histogram painters                           //
//                                                                      //
//////////////////////////////////////////////////////////////////////////


#ifndef ROOT_TClass
#include "TClass.h"
#endif

class TH1;
class TF1;
class TList;


class TVirtualHistPainter : public TObject {

private:
   static TClass   *fgPainter; //Pointer to class painter

public:
   TVirtualHistPainter() { }
   virtual ~TVirtualHistPainter() { }
   virtual Int_t      DistancetoPrimitive(Int_t px, Int_t py) = 0;
   virtual void       DrawPanel() = 0;
   virtual void       ExecuteEvent(Int_t event, Int_t px, Int_t py) = 0;
   virtual void       FitPanel() = 0;
   virtual char      *GetObjectInfo(Int_t px, Int_t py) const = 0;
   virtual TList     *GetStack() const = 0;
   virtual void       Paint(Option_t *option="") = 0;
   virtual void       PaintStat(Int_t dostat, TF1 *fit) = 0;
   virtual void       ProcessMessage(const char *mess, const TObject *obj) = 0;
   virtual void       SetHistogram(TH1 *h) = 0;
   virtual void       SetStack(TList *stack) = 0;

   static TVirtualHistPainter *HistPainter(TH1 *obj);
   static void                 SetPainter(const char *painter);

   ClassDef(TVirtualHistPainter,0)  //Abstract interface for histogram painters
};

#endif