TGaxis

class TGaxis : public TLine, public TAttText

    public:

                     TGaxis TGaxis()
                     TGaxis TGaxis(Float_t xmin, Float_t ymin, Float_t xmax, Float_t ymax, Float_t wmin, Float_t wmax, Int_t ndiv = 510, Option_t* chopt, Float_t gridlength = 0)
                     TGaxis TGaxis(TGaxis&)
               virtual void ~TGaxis()
               virtual void AdjustBinSize(Float_t A1, Float_t A2, Int_t nold, Float_t& BinLow, Float_t& BinHigh, Int_t& nbins, Float_t& BinWidth)
                    TClass* Class()
               virtual void Draw(Option_t* chopt)
               virtual void DrawAxis(Float_t xmin, Float_t ymin, Float_t xmax, Float_t ymax, Float_t wmin, Float_t wmax, Int_t ndiv = 510, Option_t* chopt, Float_t gridlength = 0)
                    Float_t GetGridLength()
                      Int_t GetLabelFont()
                    Float_t GetLabelOffset()
                    Float_t GetLabelSize()
      virtual const Text_t* GetName()
                      Int_t GetNdiv()
      virtual const Text_t* GetOption()
                    Float_t GetTickSize()
      virtual const Text_t* GetTitle()
                    Float_t GetTitleOffset()
                    Float_t GetTitleSize()
                    Float_t GetWmax()
                    Float_t GetWmin()
            virtual TClass* IsA()
                       void LabelsLimits(char* label, Int_t& first, Int_t& last)
               virtual void Optimize(Float_t A1, Float_t A2, Int_t nold, Float_t& BinLow, Float_t& BinHigh, Int_t& nbins, Float_t& BWID)
               virtual void Paint(Option_t* chopt)
               virtual void PaintAxis(Float_t xmin, Float_t ymin, Float_t xmax, Float_t ymax, Float_t& wmin, Float_t& wmax, Int_t& ndiv, Option_t* chopt, Float_t gridlength = 0)
               virtual void Rotate(Float_t X, Float_t Y, Float_t CFI, Float_t SFI, Float_t XT, Float_t YT, Float_t& U, Float_t& V)
               virtual void SavePrimitive(ofstream& out, Option_t* option)
                       void SetGridLength(Float_t gridlength)
                       void SetLabelFont(Int_t labelfont)
                       void SetLabelOffset(Float_t labeloffset)
                       void SetLabelSize(Float_t labelsize)
               virtual void SetName(Text_t* name)
                       void SetOption(Option_t* option)
                       void SetTickSize(Float_t ticksize)
               virtual void SetTitle(Text_t* title)
                       void SetTitleOffset(Float_t titleoffset = 1)
                       void SetTitleSize(Float_t titlesize)
                       void SetWmax(Float_t wmax)
                       void SetWmin(Float_t wmin)
               virtual void ShowMembers(TMemberInspector& insp, char* parent)
               virtual void Streamer(TBuffer& b)

  Data Members
    private:

        Int_t fNdiv         Number of divisions
      Float_t fWmin         Lowest value on the axis
      Float_t fWmax         Highest value on the axis
      Float_t fGridLength   Length of the grid in NDC
      Float_t fTickSize     Size of primary tick mark in NDC
      Float_t fLabelOffset  Offset of label wrt axis
      Float_t fLabelSize    Size of labels in NDC
      Float_t fTitleOffset  Offset of title wrt axis
      Float_t fTitleSize    Size of title in NDC
        Int_t fLabelFont    Font for labels
      TString fChopt        Axis options
      TString fName         axis name
      TString fTitle        axis title

Class Description

 Service class for the graphical representation of axis.
 Instances of this class are generated by the histogram classes and TGraph.

 The picture below has been generated by the following macro.
{

  gROOT.Reset();

  c1 = new TCanvas("c1","Examples of Gaxis",10,10,700,500);

  c1->Range(-10,-1,10,1);

  TGaxis *axis1 = new TGaxis(-4,-0.2,8,-0.2,-6,8,510,"");
  axis1->Draw();

  TGaxis *axis2 = new TGaxis(-4,0.2,8,0.2,0.001,10000,510,"G");
  axis2->Draw();

  TGaxis *axis3 = new TGaxis(-8,-0.8,-8,0.8,-8,8,50510,"");
  axis3->Draw();

  TGaxis *axis4 = new TGaxis(-6,-0.8,-6,0.8,1,10000,50510,"G");
  axis4->Draw();

  TGaxis *axis5 = new TGaxis(-4,-0.6,8,-0.6,1.2,1.32,80506,"-+");
  axis5->SetLabelSize(0.03);
  axis5->SetTextFont(72);
  axis5->SetLabelOffset(0.025);

  axis5->Draw();

  TGaxis *axis6 = new TGaxis(-4,0.6,8,0.6,100,900,50510,"-");
  axis6->Draw();
}

/*

*/

*-*-*-*-*-*-*-*-*-*-*Gaxis default constructor-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  =========================

*-*-*-*-*-*-*-*-*-*-*Gaxis normal constructor-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  =========================
  See explanation of parameters in PaintAxis

*-*-*-*-*-*-*-*-*-*-*Gaxis default destructor-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  =======================

*-*-*-*-*-*-*-*-*-*-*Draw this axis with its current attributes*-*-*-*-*-*-*
*-*                  ==========================================

*-*-*-*-*-*-*-*-*-*-*Draw this axis with new attributes*-*-*-*-*-*-*-*-*-*
*-*                  ==================================

*-*-*-*-*-*-*-*-*-*-*Draw this axis with its current attributes*-*-*-*-*-*-*
*-*                  ==========================================

*-*-*-*-*-*-*-*-*-*-*-*Control function to draw an axis*-*-*-*-*-*-*-*-*-*-*
*-*                    ================================

============> Original authors (O.Couet C.E.Vandoni N.Cremel-Somon)
              largely modified and converted to C++ class by Rene Brun

 _Input parameters:

  xmin      : X origin coordinate in WC space.
  xmax      : X end axis coordinate in WC space.
  ymin      : Y origin coordinate in WC space.
  ymax      : Y end axis coordinate in WC space.
  wmin      : Lowest value for the tick mark
              labels written on the axis.
  wmax      : Highest value for the tick mark labels
              written on the axis.
  ndiv      : Number of divisions.

       ndiv=N1 + 100*N2 + 10000*N3
       N1=number of 1st divisions.
       N2=number of 2nd 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.

  chopt :  Options (see below).

       chopt='G': loGarithmic scale, default is linear.
       chopt='B': Blank axis. Useful to superpose axis.

 Orientation of tick marks on axis.
 ----------------------------------

   Tick marks are normally drawn on the positive side of the axis,
   however, if X0=X1, then negative.

       chopt='+': tick marks are drawn on Positive side. (default)
       chopt='-': tick mark are drawn on the negative side.
       i.e: '+-' --> tick marks are drawn on both sides of the axis.
       chopt='U': Unlabeled axis, default is labeled.

 Position of labels on axis.
 ---------------------------

   Labels are normally drawn on side opposite to tick marks.
   However:

       chopt='=': on Equal side

 Orientation of labels on axis.
 ------------------------------

   Labels are normally drawn parallel to the axis.
   However if X0=X1, then Orthogonal
           if Y0=Y1, then Parallel

 Position of labels on tick marks.
 ---------------------------------

   Labels are centered on tick marks.
   However , if X0=X1, then they are right adjusted.

       chopt='R': labels are Right adjusted on tick mark.
                    (default is centered)
       chopt='L': labels are Left adjusted on tick mark.
       chopt='C': labels are Centered on tick mark.
       chopt='M': In the Middle of the divisions.

 Format of labels.
 -----------------

   Blank characters are stripped, and then the
   label is correctly aligned. the dot, if last
   character of the string, is also stripped.

   In the following, we have some parameters, like
   tick marks length and characters height (in percentage
   of the length of the axis (WC))
   The default values are as follows:

   Primary tick marks: 3.0 %
   Secondary tick marks: 1.5 %
   Third order tick marks: .75 %
   Characters height for labels: 4%

   Labels offset: 1.0 %

 Optional grid.
 --------------

       chopt='W': cross-Wire

 Axis bining optimization.
 -------------------------

   By default the axis bining is optimized .

       chopt='N': No bining optimization
       chopt='I': Integer labelling

*-*-*-*-*-*-*-*-*-*-*-*Reasonable Axis labels optimisation*-*-*-*-*-*-*-*-*
*-*                    ===================================
*-*  Get reasonable values for tick marks & ensure they are
*-*  not plotted beyond allowed limits
*-*
*-* _Input parameters:
*-*
*-*  A1,A2 : Old WMIN,WMAX .
*-*  BinLow,BinHigh : New WMIN,WMAX .
*-*  nold   : Old NDIV .
*-*  nbins    : New NDIV .
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

*-*-*-*-*-*-*-*-*-*-*-*Axis labels optimisation*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                    ========================

   This routine adjusts the bining of the axis
   in order to have integer values for the labels

 _Input parameters:

  A1,A2    : Old WMIN,WMAX .
  BinLow,BinHigh : New WMIN,WMAX .
  nold     : Old NDIV (primary divisions)
  nbins    : New NDIV .

*-*-*-*-*-*-*-*-*Find first and last character of a label*-*-*-*-*-*-*-*-*-*
*-*              ========================================

*-*-*-*-*-*-*-*-*-*-*-*-*-*Rotate axis coordinates*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                        =======================

 Save primitive as a C++ statement(s) on output stream out

*-*-*-*-*-*-*-*-*-*-*Change the name of the axis*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ============================

*-*-*-*-*-*-*-*-*-*-*-*-*-*-*To set axis options*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                          ===================

*-*-*-*-*-*-*-*-*-*-*Change the title of the axis*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ============================

Inline Functions

              Float_t GetGridLength()
                Int_t GetLabelFont()
              Float_t GetLabelOffset()
              Float_t GetLabelSize()
              Float_t GetTitleOffset()
              Float_t GetTitleSize()
        const Text_t* GetName()
        const Text_t* GetOption()
        const Text_t* GetTitle()
                Int_t GetNdiv()
              Float_t GetWmin()
              Float_t GetWmax()
              Float_t GetTickSize()
                 void SetLabelFont(Int_t labelfont)
                 void SetLabelOffset(Float_t labeloffset)
                 void SetLabelSize(Float_t labelsize)
                 void SetTickSize(Float_t ticksize)
                 void SetGridLength(Float_t gridlength)
                 void SetTitleOffset(Float_t titleoffset = 1)
                 void SetTitleSize(Float_t titlesize)
                 void SetWmin(Float_t wmin)
                 void SetWmax(Float_t wmax)
              TClass* Class()
              TClass* IsA()
                 void ShowMembers(TMemberInspector& insp, char* parent)
                 void Streamer(TBuffer& b)
               TGaxis TGaxis(TGaxis&)