TMathText.h

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// @(#)root/graf:$Id: TMathText.h 20882 2007-11-19 11:31:26Z rdm $
// Author: Yue Shi Lai   12/12/09
 
/*************************************************************************
 * Copyright (C) 2009, Yue Shi Lai.                                      *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
#ifndef ROOT_TMathText
#define ROOT_TMathText
 
#include "TText.h"
#include "TAttFill.h"
 
class TMathTextRenderer;
 
class TMathText : public TText, public TAttFill {
protected:
 
   friend class TMathTextRenderer;
 
   TMathTextRenderer *fRenderer{nullptr}; //!TMathText Painter
   TMathText &operator=(const TMathText &);
 
   void Render(const Double_t x, const Double_t y,
               const Double_t size, const Double_t angle,
               const Char_t *t, const Int_t length);
   void GetSize(Double_t &x0, Double_t &y0,
                Double_t &x1, Double_t &y1,
                const Double_t size, const Double_t angle,
                const Char_t *t, const Int_t length);
   void GetAlignPoint(Double_t &x0, Double_t &y0,
                      const Double_t size, const Double_t angle,
                      const Char_t *t, const Int_t length,
                      const Short_t align);
public:
   enum {
      kTextNDC = BIT(14)
   };
   TMathText();
   TMathText(Double_t x, Double_t y, const char *text);
   TMathText(const TMathText &text);
   ~TMathText() override;
   void Copy(TObject &text) const override;
   TMathText *DrawMathText(Double_t x, Double_t y, const char *text);
   void GetBoundingBox(UInt_t &w, UInt_t &h, Bool_t angle = kFALSE) override;
   Double_t GetXsize();
   Double_t GetYsize();
   void Paint(Option_t *option = "") override;
   virtual void PaintMathText(Double_t x, Double_t y, Double_t angle, Double_t size, const char *text);
   void SavePrimitive(std::ostream &out, Option_t *option = "") override;
 
   ClassDefOverride(TMathText,2) //TeX mathematical formula
};
 
#endif