    // @(#)root/base:$Name:  $:$Id: TStyle.cxx,v 1.36 2004/07/08 12:18:49 brun Exp $
    // Author: Rene Brun   12/12/94

    /*************************************************************************
     * 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.             *
     *************************************************************************/

    #include <string.h>
    #include <stdio.h>
    #include <ctype.h>
    #include <math.h>

    #include "TROOT.h"
    #include "TStyle.h"
    #include "TColor.h"
    #include "TVirtualPad.h"

    TStyle  *gStyle;
    const UInt_t kTakeStyle = BIT(17);

    ClassImp(TStyle)

    //______________________________________________________________________________
    //
    // TStyle objects may be created to define special styles.
    // By default ROOT creates a default style that can be accessed via
    // the gStyle pointer.
    //
    // This class includes functions to set the following object attributes.
    //   - Canvas
    //   - Pad
    //   - Histogram axis
    //   - Lines
    //   - Fill areas
    //   - Text
    //   - Markers
    //   - Functions
    //   - Histogram Statistics and Titles
    //

    //______________________________________________________________________________
     TStyle::TStyle() :TNamed()
    {

       Reset();
    }

    //______________________________________________________________________________
     TStyle::TStyle(const char *name, const char *title) : TNamed(name,title)
    {
    // Create a new TStyle.
    // The following names are reserved to create special styles
    //   -Default: the default style set in TStyle::Reset
    //   -Plain: a black&white oriented style
    //   -Bold:
    //   -Video;
    //   -Pub:
    //     (see the definition of these styles below).
    //
    // Note a side-effect of calling gStyle->SetFillColor(0). This is nearly
    // equivalent of selecting the "Plain" style.
    //
    // Many graphics attributes may be set via the TStyle, see in particular
    //  - TStyle::SetNdivisions
    //  - TStyle::SetAxisColor
    //  - TStyle::SetHeaderPS
    //  - TStyle::SetTitlePS
    //  - TStyle::SetLabelColor
    //  - TStyle::SetLabelFont
    //  - TStyle::SetLabelOffset
    //  - TStyle::SetLabelSize
    //  - TStyle::SetOptDate
    //  - TStyle::SetLineStyleString
    //  - TStyle::SetOptFit
    //  - TStyle::SetOptStat
    //  - TStyle::SetPaperSize
    //  - TStyle::SetTickLength
    //  - TStyle::SetTitleOffset
    //  - TStyle::SetTitleSize
    //  - TStyle::SetPalette
    //  - TStyle::SetTimeOffset
    //  - TStyle::SetStripDecimals
    //
    //  The current style is pointed by gStyle.
    //  When calling myStyle->cd(), gStyle is set to myStyle.
    //  One can also use gROOT to change the current style, eg
    //    gROOT->SetStyle("Plain") will change the current style gStyle to the "Plain" style
    //  See also TROOT::ForceStyle and TROOT::UseCurrentStyle

       Reset();

       gROOT->GetListOfStyles()->Add(this);

       //may be a standard style to be initialized
       if (strcmp(name,"Plain") == 0) {
          SetFrameBorderMode(0);
          SetCanvasBorderMode(0);
          SetPadBorderMode(0);
          SetPadColor(0);
          SetCanvasColor(0);
          SetTitleFillColor(0);
          SetTitleBorderSize(1);
          SetStatColor(0);
          SetStatBorderSize(1);
          return;
       }
       if (strcmp(name,"Bold") == 0) {
       // Authors: Art Poskanzer and Jim Thomas, LBNL, Oct. 2000
          SetPalette(1,0);
          SetCanvasColor(10);
          SetCanvasBorderMode(0);
          SetFrameLineWidth(3);
          SetFrameFillColor(10);
          SetPadColor(10);
          SetPadTickX(1);
          SetPadTickY(1);
          SetPadBottomMargin(0.15);
          SetPadLeftMargin(0.15);
          SetHistLineWidth(3);
          SetHistLineColor(kRed);
          SetFuncWidth(3);
          SetFuncColor(kGreen);
          SetLineWidth(3);
          SetLabelSize(0.05,"X");
          SetLabelSize(0.05,"Y");
          SetLabelSize(0.05,"Z");
          SetLabelOffset(0.01,"Y");
          SetLabelColor(kBlue,"X");
          SetLabelColor(kBlue,"Y");
          SetTitleSize(0.06,"X");
          SetTitleSize(0.06,"Y");
          SetTitleSize(0.06,"Z");
          SetTitleOffset(1.3,"Y");
          SetTitleFillColor(10);
          SetTitleTextColor(kBlue);
          SetStatColor(10);
          return;
       }
       if (strcmp(name,"Video") == 0) {
         // Author: Art Poskanzer, LBNL, Oct. 1999
          SetPalette(1,0);
          SetCanvasColor(10);
          SetCanvasBorderMode(0);
          SetFrameLineWidth(3);
          SetFrameFillColor(10);
          SetPadColor(10);
          SetPadTickX(1);
          SetPadTickY(1);
          SetPadBottomMargin(0.2);
          SetPadLeftMargin(0.2);
          SetHistLineWidth(8);
          SetHistLineColor(kRed);
          SetLabelSize(0.06,"X");
          SetLabelSize(0.06,"Y");
          SetLabelSize(0.06,"Z");
          SetLabelColor(kBlue,"X");
          SetLabelColor(kBlue,"Y");
          SetLabelColor(kBlue,"Z");
          SetTitleSize(0.08,"X");
          SetTitleSize(0.08,"Y");
          SetTitleSize(0.08,"Z");
          SetTitleFillColor(10);
          SetTitleTextColor(kBlue);
          SetStatColor(10);
          SetFuncWidth(8);
          SetFuncColor(kGreen);
          SetLineWidth(3);
          return;
       }
       if (strcmp(name,"Pub") == 0) {
       // Authors: Art Poskanzer and Jim Thomas, LBNL, Oct. 2000
          SetOptTitle(0);
          SetOptStat(0);
          SetPalette(8,0);
          SetCanvasColor(10);
          SetCanvasBorderMode(0);
          SetFrameLineWidth(3);
          SetFrameFillColor(10);
          SetPadColor(10);
          SetPadTickX(1);
          SetPadTickY(1);
          SetPadBottomMargin(0.15);
          SetPadLeftMargin(0.15);
          SetHistLineWidth(3);
          SetHistLineColor(kRed);
          SetFuncWidth(3);
          SetFuncColor(kGreen);
          SetLineWidth(3);
          SetLabelSize(0.05,"X");
          SetLabelSize(0.05,"Y");
          SetLabelSize(0.05,"Z");
          SetLabelOffset(0.01,"Y");
          SetLabelColor(kBlack,"X");
          SetLabelColor(kBlack,"Y");
          SetLabelColor(kBlack,"Z");
          SetTitleSize(0.06,"X");
          SetTitleSize(0.06,"Y");
          SetTitleSize(0.06,"Z");
          SetTitleOffset(1.3,"Y");
          SetTitleFillColor(10);
          SetTitleTextColor(kBlue);
          return;
       }

    }

    //______________________________________________________________________________
     TStyle::~TStyle()
    {
       gROOT->GetListOfStyles()->Remove(this);
       if (gStyle == this) gStyle = (TStyle*)gROOT->GetListOfStyles()->Last();
    }

    //______________________________________________________________________________
     TStyle::TStyle(const TStyle &style) : TNamed(style), TAttLine(style), TAttFill(style), TAttMarker(style), TAttText(style)
    {
       ((TStyle&)style).Copy(*this);
    }

    //______________________________________________________________________________
     void TStyle::Browse(TBrowser *)
    {
        cd();
    }

    //______________________________________________________________________________
     void TStyle::BuildStyles()
    {
        // create some standard styles
       new TStyle("Plain",  "Plain Style (no colors/fill areas)");
       new TStyle("Bold",   "Bold Style");;
       new TStyle("Video",  "Style for video presentation histograms");
       new TStyle("Pub",    "Style for Publications");
       new TStyle("Default","Default Style");
    }

    //______________________________________________________________________________
     void TStyle::cd()
    {
    //   Change current style
       gStyle = this;
    }

    //______________________________________________________________________________
     void TStyle::Copy(TObject &obj) const
    {
       TAttLine::Copy(((TStyle&)obj));
       TAttFill::Copy(((TStyle&)obj));
       TAttMarker::Copy(((TStyle&)obj));
       TAttText::Copy(((TStyle&)obj));
       fXaxis.Copy(((TStyle&)obj).fXaxis);
       fYaxis.Copy(((TStyle&)obj).fYaxis);
       fZaxis.Copy(((TStyle&)obj).fZaxis);
       ((TStyle&)obj).fScreenFactor   = fScreenFactor;
       ((TStyle&)obj).fCanvasColor    = fCanvasColor;
       ((TStyle&)obj).fCanvasBorderSize= fCanvasBorderSize;
       ((TStyle&)obj).fCanvasBorderMode= fCanvasBorderMode;
       ((TStyle&)obj).fCanvasDefH     = fCanvasDefH;
       ((TStyle&)obj).fCanvasDefW     = fCanvasDefW;
       ((TStyle&)obj).fCanvasDefX     = fCanvasDefX;
       ((TStyle&)obj).fCanvasDefY     = fCanvasDefY;
       ((TStyle&)obj).fPadColor       = fPadColor;
       ((TStyle&)obj).fPadBorderSize  = fPadBorderSize;
       ((TStyle&)obj).fPadBorderMode  = fPadBorderMode;
       ((TStyle&)obj).fPadBottomMargin= fPadBottomMargin;
       ((TStyle&)obj).fPadTopMargin   = fPadTopMargin;
       ((TStyle&)obj).fPadLeftMargin  = fPadLeftMargin;
       ((TStyle&)obj).fPadRightMargin = fPadRightMargin;
       ((TStyle&)obj).fPadGridX       = fPadGridX;
       ((TStyle&)obj).fPadGridY       = fPadGridY;
       ((TStyle&)obj).fPadTickX       = fPadTickX;
       ((TStyle&)obj).fPadTickY       = fPadTickY;
       ((TStyle&)obj).fPaperSizeX     = fPaperSizeX;
       ((TStyle&)obj).fPaperSizeY     = fPaperSizeY;
       ((TStyle&)obj).fFuncColor      = fFuncColor;
       ((TStyle&)obj).fFuncStyle      = fFuncStyle;
       ((TStyle&)obj).fFuncWidth      = fFuncWidth;
       ((TStyle&)obj).fGridColor      = fGridColor;
       ((TStyle&)obj).fGridStyle      = fGridStyle;
       ((TStyle&)obj).fGridWidth      = fGridWidth;
       ((TStyle&)obj).fFrameFillColor = fFrameFillColor;
       ((TStyle&)obj).fFrameFillStyle = fFrameFillStyle;
       ((TStyle&)obj).fFrameLineColor = fFrameLineColor;
       ((TStyle&)obj).fFrameLineStyle = fFrameLineStyle;
       ((TStyle&)obj).fFrameLineWidth = fFrameLineWidth;
       ((TStyle&)obj).fFrameBorderSize= fFrameBorderSize;
       ((TStyle&)obj).fFrameBorderMode= fFrameBorderMode;
       ((TStyle&)obj).fHistFillColor  = fHistFillColor;
       ((TStyle&)obj).fHistFillStyle  = fHistFillStyle;
       ((TStyle&)obj).fHistLineColor  = fHistLineColor;
       ((TStyle&)obj).fHistLineStyle  = fHistLineStyle;
       ((TStyle&)obj).fHistLineWidth  = fHistLineWidth;
       ((TStyle&)obj).fBarWidth       = fBarWidth;
       ((TStyle&)obj).fBarOffset      = fBarOffset;
       ((TStyle&)obj).fDrawBorder     = fDrawBorder;
       ((TStyle&)obj).fOptLogx        = fOptLogx;
       ((TStyle&)obj).fOptLogy        = fOptLogy;
       ((TStyle&)obj).fOptLogz        = fOptLogz;
       ((TStyle&)obj).fOptDate        = fOptDate;
       ((TStyle&)obj).fOptFile        = fOptFile;
       ((TStyle&)obj).fOptFit         = fOptFit;
       ((TStyle&)obj).fOptStat        = fOptStat;
       ((TStyle&)obj).fOptTitle       = fOptTitle;
       ((TStyle&)obj).fErrorMarker    = fErrorMarker;
       ((TStyle&)obj).fEndErrorSize   = fEndErrorSize;
       ((TStyle&)obj).fErrorX         = fErrorX;
       ((TStyle&)obj).fStatColor      = fStatColor;
       ((TStyle&)obj).fStatTextColor  = fStatTextColor;
       ((TStyle&)obj).fStatBorderSize = fStatBorderSize;
       ((TStyle&)obj).fStatFont       = fStatFont;
       ((TStyle&)obj).fStatFontSize   = fStatFontSize;
       ((TStyle&)obj).fStatStyle      = fStatStyle;
       ((TStyle&)obj).fStatFormat     = fStatFormat;
       ((TStyle&)obj).fStatW          = fStatW;
       ((TStyle&)obj).fStatH          = fStatH ;
       ((TStyle&)obj).fStatX          = fStatX;
       ((TStyle&)obj).fStatY          = fStatY;
       ((TStyle&)obj).fTitleColor     = fTitleColor;
       ((TStyle&)obj).fTitleTextColor = fTitleTextColor;
       ((TStyle&)obj).fTitleFont      = fTitleFont;
       ((TStyle&)obj).fTitleFontSize  = fTitleFontSize;
       ((TStyle&)obj).fTitleStyle     = fTitleStyle;
       ((TStyle&)obj).fTitleBorderSize= fTitleBorderSize;
       ((TStyle&)obj).fTitleW         = fTitleW;
       ((TStyle&)obj).fTitleH         = fTitleH;
       ((TStyle&)obj).fTitleX         = fTitleX;
       ((TStyle&)obj).fTitleY         = fTitleY;
       ((TStyle&)obj).fDateX          = fDateX;
       ((TStyle&)obj).fDateY          = fDateY;
       ((TStyle&)obj).fFitFormat      = fFitFormat;
       ((TStyle&)obj).fPaintTextFormat= fPaintTextFormat;
       ((TStyle&)obj).fShowEventStatus= fShowEventStatus;
       ((TStyle&)obj).fShowEditor     = fShowEditor;
       ((TStyle&)obj).fShowToolBar    = fShowToolBar;
       ((TStyle&)obj).fLegoInnerR     = fLegoInnerR;
       ((TStyle&)obj).fStripDecimals  = fStripDecimals;
       ((TStyle&)obj).fNumberContours = fNumberContours;
       Int_t i;
       for (i=0;i<30;i++) {
          ((TStyle&)obj).fLineStyle[i]     = fLineStyle[i];
       }
       Int_t ncolors = fPalette.fN;
       ((TStyle&)obj).fPalette.Set(ncolors);
       for (i=0;i<ncolors;i++) {
          ((TStyle&)obj).fPalette.fArray[i] = fPalette.fArray[i];
       }
       ((TStyle&)obj).fHeaderPS       = fHeaderPS;
       ((TStyle&)obj).fTitlePS        = fTitlePS;
       ((TStyle&)obj).fLineScalePS    = fLineScalePS;
       ((TStyle&)obj).fTimeOffset     = fTimeOffset;
    }

    //______________________________________________________________________________
     void TStyle::Reset(Option_t *)
    {
       TAttLine::ResetAttLine();
       TAttFill::ResetAttFill();
       TAttText::ResetAttText();
       TAttMarker::ResetAttMarker();
       SetFillStyle(1001);
       SetFillColor(19);
       fXaxis.ResetAttAxis("X");
       fYaxis.ResetAttAxis("Y");
       fZaxis.ResetAttAxis("Z");
       fCanvasColor    = 19;
       fCanvasBorderSize= 2;
       fCanvasBorderMode= 1;
       fCanvasDefH     = 500;
       fCanvasDefW     = 700;
       fCanvasDefX     = 10;
       fCanvasDefY     = 10;
       fPadColor       = fCanvasColor;
       fPadBorderSize  = fCanvasBorderSize;
       fPadBorderMode  = fCanvasBorderMode;
       fPadBottomMargin= 0.1;
       fPadTopMargin   = 0.1;
       fPadLeftMargin  = 0.1;
       fPadRightMargin = 0.1;
       fPadGridX       = kFALSE;
       fPadGridY       = kFALSE;
       fPadTickX       = 0;
       fPadTickY       = 0;
       fFuncColor      = 1;
       fFuncStyle      = 1;
       fFuncWidth      = 3;
       fGridColor      = 0;
       fGridStyle      = 3;
       fGridWidth      = 1;
       fHistLineColor  = 1;
       fHistFillColor  = 0;
       fHistFillStyle  = 1001;
       fHistLineStyle  = 1;
       fHistLineWidth  = 1;
       fFrameLineColor = 1;
       fFrameFillColor = 0;
       fFrameFillStyle = 1001;
       fFrameLineStyle = 1;
       fFrameLineWidth = 1;
       fFrameBorderSize= 1;
       fFrameBorderMode= 1;
       fBarWidth       = 1;
       fBarOffset      = 0;
       fDrawBorder     = 0;
       fOptLogx        = 0;
       fOptLogy        = 0;
       fOptLogz        = 0;
       fOptDate        = 0;
       fOptFile        = 0;
       fOptFit         = 0;
       fOptStat        = 1;
       fOptTitle       = 1;
       fErrorMarker    = 21;
       fEndErrorSize   = 2;
       fErrorX         = 0.5;
       fScreenFactor   = 1;
       fStatColor      = fCanvasColor;
       fStatTextColor  = 1;
       fStatBorderSize = 2;
       fStatFont       = 62;
       fStatFontSize   = 0;
       fStatStyle      = 1001;
       fStatW          = 0.20;
       fStatH          = 0.16;
       fStatX          = 0.98;
       fStatY          = 0.995;
       SetStatFormat();
       SetFitFormat();
       SetPaintTextFormat();
       fTitleColor     = fCanvasColor;
       fTitleTextColor = 1;
       fTitleFont      = 62;
       fTitleFontSize  = 0;
       fTitleStyle     = 1001;
       fTitleBorderSize= 2;
       fTitleW         = 0;
       fTitleH         = 0;
       fTitleX         = 0.01;
       fTitleY         = 0.995;
       fShowEventStatus= 0;
       fShowEditor     = 0;
       fShowToolBar    = 0;
       fLegoInnerR     = 0.5;
       fHeaderPS       = "";
       fTitlePS        = "";
       fStripDecimals  = kTRUE;
       fNumberContours = 20;

       SetDateX();
       SetDateY();
       fAttDate.SetTextSize(0.025);
       fAttDate.SetTextAlign(11);
       SetLineScalePS();
       SetLineStyleString(1,"[]");
       SetLineStyleString(2,"[12 12]");
       SetLineStyleString(3,"[4 8]");
       SetLineStyleString(4,"[12 15 4 15]");
       for (Int_t i=5;i<30;i++) SetLineStyleString(i,"[]");

       SetPaperSize();

       SetPalette();

       fTimeOffset = 788918400; // UTC time at 01/01/95
    }

    //______________________________________________________________________________
     Int_t TStyle::AxisChoice( Option_t *axis) const
    {
       char achoice = toupper(axis[0]);
       if (achoice == 'X') return 1;
       if (achoice == 'Y') return 2;
       if (achoice == 'Z') return 3;
       return 0;
    }

    //______________________________________________________________________________
     Int_t TStyle::GetNdivisions( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetNdivisions();
       if (ax == 2) return fYaxis.GetNdivisions();
       if (ax == 3) return fZaxis.GetNdivisions();
       return 0;
    }

    //______________________________________________________________________________
     Color_t TStyle::GetAxisColor( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetAxisColor();
       if (ax == 2) return fYaxis.GetAxisColor();
       if (ax == 3) return fZaxis.GetAxisColor();
       return 0;
    }

    //______________________________________________________________________________
     Int_t TStyle::GetColorPalette(Int_t i) const
    //   return color number i in current palette
    {
       Int_t ncolors = GetNumberOfColors();
       if (ncolors == 0) return 0;
       Int_t icol    = i%ncolors;
       if (icol < 0) icol = 0;
       return fPalette.fArray[icol];
    }

    //______________________________________________________________________________
     Color_t TStyle::GetLabelColor( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetLabelColor();
       if (ax == 2) return fYaxis.GetLabelColor();
       if (ax == 3) return fZaxis.GetLabelColor();
       return 0;
    }

    //______________________________________________________________________________
     Style_t TStyle::GetLabelFont( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetLabelFont();
       if (ax == 2) return fYaxis.GetLabelFont();
       if (ax == 3) return fZaxis.GetLabelFont();
       return 0;
    }

    //______________________________________________________________________________
     Float_t TStyle::GetLabelOffset( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetLabelOffset();
       if (ax == 2) return fYaxis.GetLabelOffset();
       if (ax == 3) return fZaxis.GetLabelOffset();
       return 0;
    }

    //______________________________________________________________________________
     Float_t TStyle::GetLabelSize( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetLabelSize();
       if (ax == 2) return fYaxis.GetLabelSize();
       if (ax == 3) return fZaxis.GetLabelSize();
       return 0;
    }

    //______________________________________________________________________________
     const char *TStyle::GetLineStyleString(Int_t i) const
    {
    //   return line style string (used by PostScript).
    //   See SetLineStyleString for more explanations

       if (i < 1 || i > 29) return fLineStyle[0].Data();
       return fLineStyle[i].Data();
    }

    //______________________________________________________________________________
     void TStyle::GetPaperSize(Float_t &xsize, Float_t &ysize)
    {
    //    Set paper size for PostScript output
    //
       xsize = fPaperSizeX;
       ysize = fPaperSizeY;
    }

    //______________________________________________________________________________
     Float_t TStyle::GetTickLength( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetTickLength();
       if (ax == 2) return fYaxis.GetTickLength();
       if (ax == 3) return fZaxis.GetTickLength();
       return 0;
    }

    //______________________________________________________________________________
     Color_t TStyle::GetTitleColor( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetTitleColor();
       if (ax == 2) return fYaxis.GetTitleColor();
       if (ax == 3) return fZaxis.GetTitleColor();
       return fTitleTextColor;
    }

    //______________________________________________________________________________
     Style_t TStyle::GetTitleFont( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetTitleFont();
       if (ax == 2) return fYaxis.GetTitleFont();
       if (ax == 3) return fZaxis.GetTitleFont();
       return fTitleFont;
    }

    //______________________________________________________________________________
     Float_t TStyle::GetTitleOffset( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetTitleOffset();
       if (ax == 2) return fYaxis.GetTitleOffset();
       if (ax == 3) return fZaxis.GetTitleOffset();
       return 0;
    }

    //______________________________________________________________________________
     Float_t TStyle::GetTitleSize( Option_t *axis) const
    {
       Int_t ax = AxisChoice(axis);
       if (ax == 1) return fXaxis.GetTitleSize();
       if (ax == 2) return fYaxis.GetTitleSize();
       if (ax == 3) return fZaxis.GetTitleSize();
       return fTitleFontSize;
    }

    //______________________________________________________________________________
     void TStyle::SetNdivisions(Int_t n, Option_t *axis)
    {
    // Set the number of divisions to draw an axis.
    //  ndiv      : Number of divisions.
    //
    //       n = N1 + 100*N2 + 10000*N3
    //       N1=number of primary divisions.
    //       N2=number of secondary divisions.
    //       N3=number of 3rd divisions.
    //           e.g.:
    //           nndi=0 --> no tick marks.
    //           nndi=2 --> 2 divisions, one tick mark in the middle
    //                      of the axis.
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();
       if (opt.Contains("x")) fXaxis.SetNdivisions(n);
       if (opt.Contains("y")) fYaxis.SetNdivisions(n);
       if (opt.Contains("z")) fZaxis.SetNdivisions(n);
    }

    //______________________________________________________________________________
     void TStyle::SetAxisColor(Color_t color, Option_t *axis)
    {
    // Set color to draw the axis line and tick marks.
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       if (opt.Contains("x")) fXaxis.SetAxisColor(color);
       if (opt.Contains("y")) fYaxis.SetAxisColor(color);
       if (opt.Contains("z")) fZaxis.SetAxisColor(color);
    }

    //______________________________________________________________________________
     void TStyle::SetEndErrorSize(Float_t np)
    {
    // Set the size (in pixels) of the small lines drawn at the
    // end of the error bars (TH1 or TGraphErrors).
    // The default value is 2 pixels.
    // Set np=0 to remove these lines

       if (np >= 0) fEndErrorSize = np;
       else         fEndErrorSize = 0;
    }

    //______________________________________________________________________________
     void TStyle::SetHeaderPS(const char *header)
    {
    // Define a string to be inserted in the Postscript header
    // The string in header will be added to the Postscript file
    // immediatly following the %%Page line
    // For example, this string may contain special Postscript instructions like
    //      200 200 translate
    // the following header string will print the string "my annotation" at the
    // bottom left corner of the page (outside the user area)
    //  "gsave 100 -100 t 0 r 0 0 m /Helvetica-Bold findfont 56 sf 0 0 m ( my annotation ) show gr"
    // This information is used in TPostScript::Initialize

       fHeaderPS = header;
    }

    //______________________________________________________________________________
     void TStyle::SetTitlePS(const char *pstitle)
    {
    // Define a string to be used in the %%Title of the Postscript files.
    // If this string is not defined, ROOT will use the canvas title.

       fTitlePS = pstitle;
    }

    //______________________________________________________________________________
     void TStyle::SetLabelColor(Color_t color, Option_t *axis)
    {
    // Set axis labels color.
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       if (opt.Contains("x")) fXaxis.SetLabelColor(color);
       if (opt.Contains("y")) fYaxis.SetLabelColor(color);
       if (opt.Contains("z")) fZaxis.SetLabelColor(color);
    }

    //______________________________________________________________________________
     void TStyle::SetLabelFont(Style_t font, Option_t *axis)
    {
    // Set font number used to draw axis labels.
    //    font  : Text font code = 10*fontnumber + precision
    //             Font numbers must be between 1 and 14
    //             precision = 1 fast hardware fonts (steps in the size)
    //             precision = 2 scalable and rotatable hardware fonts
    // The default font number is 62.
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       if (opt.Contains("x")) fXaxis.SetLabelFont(font);
       if (opt.Contains("y")) fYaxis.SetLabelFont(font);
       if (opt.Contains("z")) fZaxis.SetLabelFont(font);
    }

    //______________________________________________________________________________
     void TStyle::SetLabelOffset(Float_t offset, Option_t *axis)
    {
    // Set offset between axis and axis labels.
    // The offset is expressed as a percent of the pad height.
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       if (opt.Contains("x")) fXaxis.SetLabelOffset(offset);
       if (opt.Contains("y")) fYaxis.SetLabelOffset(offset);
       if (opt.Contains("z")) fZaxis.SetLabelOffset(offset);
    }

    //______________________________________________________________________________
     void TStyle::SetLabelSize(Float_t size, Option_t *axis)
    {
    // Set size of axis labels. The size is expressed as a percent of the pad height.
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       if (opt.Contains("x")) fXaxis.SetLabelSize(size);
       if (opt.Contains("y")) fYaxis.SetLabelSize(size);
       if (opt.Contains("z")) fZaxis.SetLabelSize(size);
    }

    //______________________________________________________________________________
     void TStyle::SetLineStyleString(Int_t i, const char *text)
    {
    // Set line style string (used by Postscript)
    // PostScript uses the following convention
    //  a line is a suite of segments, each segment is described by the
    //  number of pixels. For example default line styles are defined as:
    //   linestyle 1  "[]"             solid
    //   linestyle 2  "[12 12]"        dashed
    //   linestyle 3  "[4 8]"          dotted
    //   linestyle 4  "[12 15 4 15]"   dash-dotted
    //
    //  Up to 30 different styles may be defined.
    //   The opening and closing brackets may be omitted
    //   They will be automaticalled added by this function.

       Int_t nch = strlen(text);
       char *st = new char[nch+10];
       sprintf(st," ");
       if (strstr(text,"[") == 0) strcat(st,"[");
       strcat(st,text);
       if (strstr(text,"]") == 0) strcat(st,"]");
       strcat(st," 0 sd");
       if (i >= 1 && i <= 29) fLineStyle[i] = st;
       delete [] st;
    }

    //______________________________________________________________________________
     void TStyle::SetNumberContours(Int_t number)
    {
    // set the default number of contour levels when drawing 2-d plots

       if (number > 0 && number < 1000) {
          fNumberContours = number;
          return;
       }

       Error("SetNumberContours","Illegal number of contours: %d, myst be > 0 and < 1000",number);
    }

    //______________________________________________________________________________
     void TStyle::SetOptDate(Int_t optdate)
    {
    // if optdate is non null, the current date/time will be printed in the canvas.
    // The position of the date string can be controlled by:
    //  optdate = 10*format + mode
    //    mode = 1   (default) date is printed in the bottom/left corner.
    //    mode = 2   date is printed in the bottom/right corner.
    //    mode = 3   date is printed in the top/right corner.
    //    format = 0 (default) date has the format like: "Wed Sep 25 17:10:35 2002"
    //    format = 1 date has the format like: "2002-09-25"
    //    format = 2 date has the format like: "2002-09-25 17:10:35"
    //
    //  examples:
    //    optdate = 1  date like "Wed Sep 25 17:10:35 2002" in the bottom/left corner.
    //    optdate = 13 date like "2002-09-25" in the top/right corner.
    //
    //  The date position can also be controlled by:
    //    gStyle->SetDateX(x);  x in NDC
    //    gStyle->SetDateY(y);  y in NDC
    //
    //  The date text attributes can be changed with:
    //    gStyle->GetAttDate()->SetTextFont(font=62);
    //    gStyle->GetAttDate()->SetTextSize(size=0.025);
    //    gStyle->GetAttDate()->SetTextAngle(angle=0);
    //    gStyle->GetAttDate()->SetTextAlign(align=11);
    //    gStyle->GetAttDate()->SetTextColor(color=1);
    //
    //  The current date attributes can be obtained via:
    //    gStyle->GetAttDate()->GetTextxxxx();
    //
    //  When the date option is active, a text object is created when the pad
    //  paint its list of primitives. The text object is named "DATE".
    //  The DATE attributes can also be edited interactively (position
    //  and attributes) via the normal context menu.

       fOptDate = optdate;
       Int_t mode = optdate%10;
       if (mode == 1) {
          SetDateX(0.01);
          SetDateY(0.01);
          fAttDate.SetTextAlign(11);
       }
       if (mode == 2) {
          SetDateX(0.99);
          SetDateY(0.01);
          fAttDate.SetTextAlign(31);
       }
       if (mode == 3) {
          SetDateX(0.99);
          SetDateY(0.99);
          fAttDate.SetTextAlign(33);
       }
    }

    //______________________________________________________________________________
     void TStyle::SetOptFit(Int_t mode)
    {
    // The type of information about fit parameters printed in the histogram
    // statistics box can be selected via the parameter mode.
    //  The parameter mode can be = pcev  (default = 0111)
    //    v = 1;  print name/values of parameters
    //    e = 1;  print errors (if e=1, v must be 1)
    //    c = 1;  print Chisquare/Number of degress of freedom
    //    p = 1;  print Probability
    //  Example: gStyle->SetOptFit(1011);
    //           print fit probability, parameter names/values and errors.
    //    When "v"=1 is specified, only the non-fixed parameters are shown.
    //    When "v"=2 all parameters are shown.
    // see also SetOptStat below.

       fOptFit = mode;
       if (gPad) {
          TObject *obj;
          TIter next(gPad->GetListOfPrimitives());
          while ((obj = next())) {
             TObject *stats = obj->FindObject("stats");
             if (stats) stats->SetBit(kTakeStyle);
          }
          gPad->Modified(); gPad->Update();
       }
    }

    //______________________________________________________________________________
     void TStyle::SetOptStat(Int_t mode)
    {
    // The type of information printed in the histogram statistics box
    //  can be selected via the parameter mode.
    //  The parameter mode can be = iourmen  (default = 0001111)
    //    n = 1;  name of histogram is printed
    //    e = 1;  number of entries printed
    //    m = 1;  mean value printed
    //    r = 1;  rms printed
    //    u = 1;  number of underflows printed
    //    o = 1;  number of overflows printed
    //    i = 1;  integral of bins printed
    //  Example: gStyle->SetOptStat(11);
    //           print only name of histogram and number of entries.
    //           gStyle->SetOptStat(1101);  displays the name of histogram, mean value and RMS.
    //  WARNING: never call SetOptStat(000111); but SetOptStat(1111), 0001111 will
    //          be taken as an octal number !!
    //  WARNING: SetOptStat(1) is taken as SetOptStat(1111) (for back compatibility
    //           with older versions. If you want to print only the name of the histogram
    //           call SetOptStat(10000001).
    //  NOTE that in case of 2-D histograms, when selecting just underflow (10000)
    //        or overflow (100000), the stats box will show all combinations
    //        of underflow/overflows and not just one single number!
    //
       fOptStat = mode;
       if (gPad) {
          TObject *obj;
          TIter next(gPad->GetListOfPrimitives());
          while ((obj = next())) {
             TObject *stats = obj->FindObject("stats");
             if (stats) stats->SetBit(kTakeStyle);
          }
          gPad->Modified(); gPad->Update();
       }
    }

      //______________________________________________________________________________
     void TStyle::SetOptStat(Option_t *stat)
    {
    //  The parameter mode can be = IOURMEN
    //    n :  name of histogram is printed
    //    e :  number of entries printed
    //    m :  mean value printed
    //    r :  rms printed
    //    u :  number of underflows printed
    //    o :  number of overflows printed
    //    i :  integral of bins printed
    //  Example: gStyle->SetOptStat("ne");
    //           print only name of histogram and number of entries.
    //  gStyle->SetOptStat("n") print only the name of the histogram
    //  gStyle->SetOptStat("nemr") is the default

      Int_t mode=0;

      TString opt = stat;
      opt.ToLower();

      if (opt.Contains("n")) mode+=1;
      if (opt.Contains("e")) mode+=10;
      if (opt.Contains("m")) mode+=100;
      if (opt.Contains("r")) mode+=1000;
      if (opt.Contains("u")) mode+=10000;
      if (opt.Contains("o")) mode+=100000;
      if (opt.Contains("i")) mode+=1000000;
      if (mode == 1) mode = 10000001;

      SetOptStat(mode);
    }

    //______________________________________________________________________________
     void TStyle::SetPaperSize(EPaperSize size)
    {
       // Set paper size for PostScript output.

       switch (size) {
          case kA4:
             SetPaperSize(20, 26);
             break;
          case kUSLetter:
             SetPaperSize(20, 24);
             break;
          default:
             Error("SetPaperSize", "illegal paper size %d\n", (int)size);
             break;
       }
    }

    //______________________________________________________________________________
     void TStyle::SetPaperSize(Float_t xsize, Float_t ysize)
    {
       // Set paper size for PostScript output.
       // The paper size is specified in centimeters. Default is 20x26.
       // See also TPad::Print

       fPaperSizeX = xsize;
       fPaperSizeY = ysize;
    }

    //______________________________________________________________________________
     void TStyle::SetTickLength(Float_t length, Option_t *axis)
    {
    // set the tick marks length for an axis.
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       if (opt.Contains("x")) fXaxis.SetTickLength(length);
       if (opt.Contains("y")) fYaxis.SetTickLength(length);
       if (opt.Contains("z")) fZaxis.SetTickLength(length);
    }

    //______________________________________________________________________________
     void TStyle::SetTitleColor(Color_t color, Option_t *axis)
    {
    // if axis =="x"  set the X axis title color
    // if axis =="y"  set the Y axis title color
    // if axis =="z"  set the Z axis title color
    // any other value of axis will set the pad title color
    //
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       Bool_t set = kFALSE;
       if (opt.Contains("x")) {fXaxis.SetTitleColor(color); set = kTRUE;}
       if (opt.Contains("y")) {fYaxis.SetTitleColor(color); set = kTRUE;}
       if (opt.Contains("z")) {fZaxis.SetTitleColor(color); set = kTRUE;}
       if (!set) fTitleColor = color;
    }

    //______________________________________________________________________________
     void TStyle::SetTitleFont(Style_t font, Option_t *axis)
    {
    // if axis =="x"  set the X axis title font
    // if axis =="y"  set the Y axis title font
    // if axis =="z"  set the Z axis title font
    // any other value of axis will set the pad title font
    //
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       Bool_t set = kFALSE;
       if (opt.Contains("x")) {fXaxis.SetTitleFont(font); set = kTRUE;}
       if (opt.Contains("y")) {fYaxis.SetTitleFont(font); set = kTRUE;}
       if (opt.Contains("z")) {fZaxis.SetTitleFont(font); set = kTRUE;}
       if (!set) fTitleFont = font;
    }

    //______________________________________________________________________________
     void TStyle::SetTitleOffset(Float_t offset, Option_t *axis)
    {
    // Specify a parameter offset to control the distance between the axis
    // and the axis title.
    // offset = 1 means : use the default distance
    // offset = 1.2 means: the distance will be 1.2*(default distance)
    // offset = 0.8 means: the distance will be 0.8*(default distance)
    //
    // axis specifies which axis ("x","y","z"), default = "x"
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       if (opt.Contains("x")) fXaxis.SetTitleOffset(offset);
       if (opt.Contains("y")) fYaxis.SetTitleOffset(offset);
       if (opt.Contains("z")) fZaxis.SetTitleOffset(offset);
    }

    //______________________________________________________________________________
     void TStyle::SetTitleSize(Float_t size, Option_t *axis)
    {
    // if axis =="x"  set the X axis title size
    // if axis =="y"  set the Y axis title size
    // if axis =="z"  set the Z axis title size
    // any other value of axis will set the pad title size
    //
    // if axis="xyz" set all 3 axes

       TString opt = axis;
       opt.ToLower();

       Bool_t set = kFALSE;
       if (opt.Contains("x")) {fXaxis.SetTitleSize(size); set = kTRUE;}
       if (opt.Contains("y")) {fYaxis.SetTitleSize(size); set = kTRUE;}
       if (opt.Contains("z")) {fZaxis.SetTitleSize(size); set = kTRUE;}
       if (!set) fTitleFontSize = size;
    }

    //______________________________________________________________________________
     Int_t TStyle::CreateGradientColorTable(UInt_t Number, Double_t* Length,
                                  Double_t* Red, Double_t* Green,
                                  Double_t* Blue, UInt_t NColors)
    {
      // STATIC function.
      // Linear gradient color table:
      // Red, Green and Blue are several RGB colors with values from 0.0 .. 1.0.
      // Their number is "Intervals".
      // Length is the length of the color interval between the RGB-colors:
      // Imaging the whole gradient goes from 0.0 for the first RGB color to 1.0
      // for the last RGB color, then each "Length"-entry in between stands for
      // the length of the intervall between the according RGB colors.
      //
      // This definition is similar to the povray-definition of gradient
      // color tables.
      //
      // In order to create a color table do the following:
      // Define the RGB Colors:
      // > UInt_t Number = 5;
      // > Double_t Red[5]   = { 0.00, 0.09, 0.18, 0.09, 0.00 };
      // > Double_t Green[5] = { 0.01, 0.02, 0.39, 0.68, 0.97 };
      // > Double_t Blue[5]  = { 0.17, 0.39, 0.62, 0.79, 0.97 };
      // Define the length of the (color)-interval between this points
      // > Double_t Stops[5] = { 0.00, 0.34, 0.61, 0.84, 1.00 };
      // i.e. the color interval between Color 2 and Color 3 is
      // 0.79 - 0.62 => 17 % of the total palette area between these colors
      //
      //  Original code by Andreas Zoglauer <zog@mpe.mpg.de>

      UInt_t g, c;
      UInt_t NPalette = 0;
      Int_t *Palette = new Int_t[NColors+1];
      UInt_t NColorsGradient;
      TColor *Color;
      Int_t HighestIndex = 0;

      // Check if all RGB values are between 0.0 and 1.0 and
      // Length goes from 0.0 to 1.0 in increasing order.
      for (c = 0; c < Number; c++) {
        if (Red[c] < 0 || Red[c] > 1.0 ||
            Green[c] < 0 || Green[c] > 1.0 ||
            Blue[c] < 0 || Blue[c] > 1.0 ||
            Length[c] < 0 || Length[c] > 1.0) {
          //Error("CreateGradientColorTable",
          //      "All RGB colors and interval lengths have to be between 0.0 and 1.0");
          delete [] Palette;
          return -1;
        }
        if (c >= 1) {
          if (Length[c-1] > Length[c]) {
            //Error("CreateGradientColorTable",
            //      "The interval lengths have to be in increasing order");
            delete [] Palette;
            return -1;
          }
        }
      }

      // Search for the highest color index not used in ROOT:
      // We do not want to overwrite some colors...
      TSeqCollection *ColorTable = gROOT->GetListOfColors();
      if ((Color = (TColor *) ColorTable->Last()) != 0) {
        if (Color->GetNumber() > HighestIndex) {
          HighestIndex = Color->GetNumber();
        }
        while ((Color = (TColor *) (ColorTable->Before(Color))) != 0) {
          if (Color->GetNumber() > HighestIndex) {
          HighestIndex = Color->GetNumber();
          }
        }
      }
      HighestIndex++;

      // Now create the colors and add them to the default palette:

      // For each defined gradient...
      for (g = 1; g < Number; g++) {
        // create the colors...
        NColorsGradient = (Int_t) (floor(NColors*Length[g]) - floor(NColors*Length[g-1]));
        for (c = 0; c < NColorsGradient; c++) {
          Color = new TColor(HighestIndex,
                             Red[g-1] + c * (Red[g] - Red[g-1])/ NColorsGradient,
                             Green[g-1] + c * (Green[g] - Green[g-1])/ NColorsGradient,
                             Blue[g-1] + c * (Blue[g] - Blue[g-1])/ NColorsGradient,
                             "  ");
          Palette[NPalette] = HighestIndex;
          NPalette++;
          HighestIndex++;
        }
      }

      gStyle->SetPalette(NPalette, Palette);
      delete [] Palette;

      return HighestIndex - NColors;
    }

    //______________________________________________________________________________
     void TStyle::SetPalette(Int_t ncolors, Int_t *colors)
    {
    // The color palette is used by the histogram classes
    //  (see TH1::Draw options).
    // For example TH1::Draw("col") draws a 2-D histogram with cells
    // represented by a box filled with a color CI function of the cell content.
    // if the cell content is N, the color CI used will be the color number
    // in colors[N],etc. If the maximum cell content is > ncolors, all
    // cell contents are scaled to ncolors.
    //
    // if ncolors <= 0 a default palette (see below) of 50 colors is defined.
    //     the colors defined in this palette are OK for coloring pads, labels
    //
    // if ncolors == 1 && colors == 0, then
    //     a Pretty Palette with a Spectrum Violet->Red is created.
    //   It is recommended to use this Pretty palette when drawing legos,
    //   surfaces or contours.
    //
    // if ncolors > 50 and colors=0, the DeepSea palette is used.
    //     (see TStyle::CreateGradientColorTable for more details)
    //
    // if ncolors > 0 and colors = 0, the default palette is used
    // with a maximum of ncolors.
    //
    // The default palette defines:
    //   index 0->9   : grey colors from light to dark grey
    //   index 10->19 : "brown" colors
    //   index 20->29 : "blueish" colors
    //   index 30->39 : "redish" colors
    //   index 40->49 : basic colors
    //
    //  The color numbers specified in the palette can be viewed by selecting
    //  the item "colors" in the "VIEW" menu of the canvas toolbar.
    //  The color parameters can be changed via TColor::SetRGB.

       Int_t i;
       Int_t palette[50] = {19,18,17,16,15,14,13,12,11,20,
                            21,22,23,24,25,26,27,28,29,30, 8,
                            31,32,33,34,35,36,37,38,39,40, 9,
                            41,42,43,44,45,47,48,49,46,50, 2,
                             7, 6, 5, 4, 3, 112,1};
       // set default palette (pad type)
       if (ncolors <= 0) {
          ncolors = 50;
          fPalette.Set(ncolors);
          for (i=0;i<ncolors;i++) fPalette.fArray[i] = palette[i];
          return;
       }

       // set Pretty Palette Spectrum Violet->Red
       if (ncolors == 1 && colors == 0) {
          ncolors = 50;
          fPalette.Set(ncolors);
          for (i=0;i<ncolors;i++) fPalette.fArray[i] = 51+i;
          return;
       }

       // set DeepSea palette
       if (colors == 0 && ncolors > 50) {
          const Int_t NRGBs = 5;
          Double_t Stops[NRGBs] = { 0.00, 0.34, 0.61, 0.84, 1.00 };
          Double_t Red[NRGBs] = { 0.00, 0.09, 0.18, 0.09, 0.00 };
          Double_t Green[NRGBs] = { 0.01, 0.02, 0.39, 0.68, 0.97 };
          Double_t Blue[NRGBs] = { 0.17, 0.39, 0.62, 0.79, 0.97 };
          CreateGradientColorTable(NRGBs, Stops, Red, Green, Blue, ncolors);
          return;
       }

       // set user defined palette
       fPalette.Set(ncolors);
       if (colors)  for (i=0;i<ncolors;i++) fPalette.fArray[i] = colors[i];
       else         for (i=0;i<ncolors;i++) fPalette.fArray[i] = palette[i];
    }

    //______________________________________________________________________________
     void TStyle::SetTimeOffset(Double_t toffset)
    {
    // Change the time offset for time plotting.
    // Times are expressed in seconds. The corresponding numbers usually have 9
    // digits (or more if one takes into account fractions of seconds).
    // Thus, since it is very inconvenient to plot very large numbers on a scale,
    // one has to set an offset time that will be added to the axis begining,
    // in order to plot times correctly and conveniently. A convenient way to
    // set the time offset is to use TDatime::Convert().

       fTimeOffset = toffset;
    }

    //______________________________________________________________________________
     void TStyle::SetStripDecimals(Bool_t strip)
    {
    //  Set option to strip decimals when drawing axis labels.
    //  By default, TGaxis::PaintAxis removes trailing 0s after a dot
    //  in the axis labels. Ex: {0,0.5,1,1.5,2,2.5, etc}
    //  If this function is called with strip=kFALSE, TGAxis::PaintAxis will
    //  draw labels with the same number of digits after the dot
    //  Ex: (0.0,0.5,1.0,1.5,2.0,2.5,etc}

       fStripDecimals = strip;
    }