TAxis


class description - source file - inheritance tree

class TAxis : public TNamed, public TAttAxis


    public:
TAxis TAxis() TAxis TAxis(Int_t nbins, Axis_t xmin, Axis_t xmax) TAxis TAxis(Int_t nbins, const Axis_t* xbins) TAxis TAxis(const TAxis& axis) virtual void ~TAxis() virtual void CenterTitle(Bool_t center = kTRUE) const char* ChooseTimeFormat(Double_t axislength = 0) const static TClass* Class() virtual void Copy(TObject& axis) virtual void Delete(Option_t*) virtual Int_t DistancetoPrimitive(Int_t px, Int_t py) virtual TObject* DrawClone(Option_t*) const virtual void ExecuteEvent(Int_t event, Int_t px, Int_t py) virtual Int_t FindBin(Axis_t x) virtual Int_t FindBin(const char* label) virtual Int_t FindFixBin(Axis_t x) const virtual Axis_t GetBinCenter(Int_t bin) const const char* GetBinLabel(Int_t bin) const virtual Axis_t GetBinLowEdge(Int_t bin) const virtual Axis_t GetBinUpEdge(Int_t bin) const virtual Axis_t GetBinWidth(Int_t bin) const virtual void GetCenter(Axis_t* center) Int_t GetFirst() const THashList* GetLabels() Int_t GetLast() const virtual void GetLowEdge(Axis_t* edge) Int_t GetNbins() const virtual TObject* GetParent() const virtual Bool_t GetTimeDisplay() const virtual const char* GetTimeFormat() const virtual const char* GetTitle() const TArrayD* GetXbins() Axis_t GetXmax() const Axis_t GetXmin() const virtual TClass* IsA() const virtual void LabelsOption(Option_t* option = h) virtual void RotateTitle(Bool_t rotate = kTRUE) virtual void SaveAttributes(ofstream& out, const char* name, const char* subname) virtual void Set(Int_t nbins, Axis_t xmin, Axis_t xmax) virtual void Set(Int_t nbins, const Float_t* xbins) virtual void Set(Int_t nbins, const Axis_t* xbins) virtual void SetBinLabel(Int_t bin, const char* label) virtual void SetDrawOption(Option_t*) virtual void SetLimits(Axis_t xmin, Axis_t xmax) virtual void SetNoExponent(Bool_t noExponent = kTRUE) virtual void SetParent(TObject* obj) virtual void SetRange(Int_t first = 0, Int_t last = 0) virtual void SetRangeUser(Axis_t ufirst, Axis_t ulast) virtual void SetTimeDisplay(Int_t value) virtual void SetTimeFormat(const char* format) virtual void ShowMembers(TMemberInspector& insp, char* parent) virtual void Streamer(TBuffer& b) void StreamerNVirtual(TBuffer& b) virtual void UnZoom()

Data Members

    private:
Int_t fNbins Number of bins Axis_t fXmin low edge of first bin Axis_t fXmax upper edge of last bin TArrayD fXbins Bin edges array in X Int_t fFirst first bin to display Int_t fLast last bin to display Bool_t fTimeDisplay on/off displaying time values instead of numerics TString fTimeFormat Date&time format, ex: 09/12/99 12:34:00 TObject* fParent !Object owning this axis THashList* fLabels List of labels public:
static const enum TAxis:: kAxisRange static const enum TAxis:: kCenterTitle static const enum TAxis:: kRotateTitle static const enum TAxis:: kPalette static const enum TAxis:: kNoExponent static const enum TAxis:: kLabelsHori static const enum TAxis:: kLabelsVert static const enum TAxis:: kLabelsDown static const enum TAxis:: kLabelsUp

Class Description

 This class manages histogram axis. It is referenced by TH1 and TGraph.
 To make a graphical representation of an histogram axis, this class
 references the TGaxis class.

 TAxis supports axis with fixed or variable bin sizes.
 Labels may be associated to individual bins.

    see examples of various axis representations drawn by class TGaxis.


TAxis(): TNamed(), TAttAxis()

TAxis(Int_t nbins,Axis_t xlow,Axis_t xup): TNamed(), TAttAxis()
*-*-*-*-*-*-*-*Axis constructor for axis with fix bin size*-*-*-*-*-*-*-*
*-*            ===========================================

TAxis(Int_t nbins,const Axis_t *xbins): TNamed(), TAttAxis()
*-*-*-*-*-*-*-*Axis constructor for variable bin size*-*-*-*-*-*-*-*-*-*-*
*-*            ======================================

~TAxis()

TAxis(const TAxis &axis)

void CenterTitle(Bool_t center)
   if center = kTRUE axis title will be centered
   default is right adjusted

const char* ChooseTimeFormat(Double_t axislength)
 Choose a reasonable time format from the coordinates in the active pad
 and the number of divisions in this axis
 If orientation = "X", the horizontal axis of the pad will be used for ref.
 If orientation = "Y", the vertical axis of the pad will be used for ref.

void Copy(TObject &obj)
*-*-*-*-*-*-*-*-*-*Copy axis structure to another axis-*-*-*-*-*-*-*-*-*-*-*
*-*                ===================================

Int_t DistancetoPrimitive(Int_t, Int_t)
*-*-*-*-*-*-*-*-*-*-*Compute distance from point px,py to an axis*-*-*-*-*-*
*-*                  ============================================

void ExecuteEvent(Int_t event, Int_t px, Int_t py)
*-*-*-*-*-*-*-*-*-*-*Execute action corresponding to one event*-*-*-*
*-*                  =========================================
  This member function is called when an axis is clicked with the locator

  The axis range is set between the position where the mouse is pressed
  and the position where it is released.
  If the mouse position is outside the current axis range when it is released
  the axis is unzoomed with the corresponding proportions.
  Note that the mouse does not need to be in the pad or even canvas
  when it is released.

Int_t FindBin(Axis_t x)
*-*-*-*-*-*-*-*-*Find bin number corresponding to abscissa x-*-*-*-*-*-*
*-*              ===========================================

 If x is underflow or overflow, attempt to rebin histogram

Int_t FindBin(const char *label)
 Find bin number with label.
 If label is not in the list of labels, add it.
 If the number of labels exceeds the number of bins, double the number
 of bins via TH1::LabelsInflate (if the histogram can be rebinned).


Int_t FindFixBin(Axis_t x) const
*-*-*-*-*-*-*-*-*Find bin number corresponding to abscissa x-*-*-*-*-*-*
*-*              ===========================================

const char* GetBinLabel(Int_t bin) const
 Return label for bin

Int_t GetFirst() const
             return first bin on the axis
       - 0 if no range defined

Int_t GetLast() const
             return last bin on the axis
       - fNbins if no range defined

Axis_t GetBinCenter(Int_t bin) const
*-*-*-*-*-*-*-*-*-*-*Return center of bin*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ====================

Axis_t GetBinLowEdge(Int_t bin) const
*-*-*-*-*-*-*-*-*-*-*Return low edge of bin-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ======================

Axis_t GetBinUpEdge(Int_t bin) const
*-*-*-*-*-*-*-*-*-*-*Return up edge of bin-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ======================

Axis_t GetBinWidth(Int_t bin) const
*-*-*-*-*-*-*-*-*-*-*Return bin width-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ================

void GetCenter(Axis_t *center)
*-*-*-*-*-*-*-*-*Return an array with the center of all bins-*-*-*-*-*-*-*
*-*              ===========================================

void GetLowEdge(Axis_t *edge)
*-*-*-*-*-*-*-*-*Return an array with the lod edge of all bins-*-*-*-*-*-*-*
*-*              =============================================

void LabelsOption(Option_t *option)
  Set option(s) to draw axis with labels
  option = "a" sort by alphabetic order
         = ">" sort by decreasing values
         = "<" sort by increasing values
         = "h" draw labels horizonthal
         = "v" draw labels vertical
         = "u" draw labels up (end of label right adjusted)
         = "d" draw labels down (start of label left adjusted)

void RotateTitle(Bool_t rotate)
    rotate title by 180 degrees
    by default the title is drawn right adjusted.
    if rotate is TRUE, the title is left adjusted at the end of the axis
    and rotated by 180 degrees

void SaveAttributes(ofstream &out, const char *name, const char *subname)
 Save axis attributes as C++ statement(s) on output stream out

void Set(Int_t nbins, Axis_t xlow, Axis_t xup)
*-*-*-*-*-*-*-*-*Initialize axis with fix bins*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*              =============================

void Set(Int_t nbins, const Float_t *xbins)
*-*-*-*-*-*-*-*-*Initialize axis with variable bins*-*-*-*-*-*-*-*-*-*-*-*-*
*-*              ==================================

void Set(Int_t nbins, const Axis_t *xbins)
*-*-*-*-*-*-*-*-*Initialize axis with variable bins*-*-*-*-*-*-*-*-*-*-*-*-*
*-*              ==================================

void SetBinLabel(Int_t bin, const char *label)
 Set label for bin

void SetLimits(Axis_t xmin, Axis_t xmax)
          Set the axis limits

void SetNoExponent(Bool_t noExponent)
 Set the NoExponent flag
 By default, an exponent of the form 10^N is used when the label values
 are either all very small or very large.
 One can disable the exponent by calling axis.SetNoExponent(kTRUE).
 The flag (in fBits) is passed to the drawing function TGaxis::PaintAxis

void SetRange(Int_t first, Int_t last)
  Set the viewing range for the axis from bin first to last
  To set a range using the axis coordinates, use TAxis::SetRangeUser.

void SetRangeUser(Axis_t ufirst, Axis_t ulast)
  Set the viewing range for the axis from ufirst to ulast (in user coordinates)
  To set a range using the axis bin numbers, use TAxis::SetRange.

void SetTimeFormat(const char *tformat)
*-*-*-*-*-*-*-*-*-*-*Change the format used for time plotting *-*-*-*-*-*-*-*
*-*                  ========================================
  The format string for date and time use the same options as the one used
  in the standard strftime C function, i.e. :
    for date :
      %a abbreviated weekday name
      %b abbreviated month name
      %d day of the month (01-31)
      %m month (01-12)
      %y year without century

    for time :
      %H hour (24-hour clock)
      %I hour (12-hour clock)
      %p local equivalent of AM or PM
      %M minute (00-59)
      %S seconds (00-61)
      %% %

void Streamer(TBuffer &R__b)
 Stream an object of class TAxis.

void UnZoom()
 Reset first & last bin to the full range



Inline Functions


               void Delete(Option_t*)
           TObject* DrawClone(Option_t*) const
         THashList* GetLabels()
              Int_t GetNbins() const
           TObject* GetParent() const
             Bool_t GetTimeDisplay() const
        const char* GetTimeFormat() const
        const char* GetTitle() const
           TArrayD* GetXbins()
             Axis_t GetXmin() const
             Axis_t GetXmax() const
               void SetDrawOption(Option_t*)
               void SetParent(TObject* obj)
               void SetTimeDisplay(Int_t value)
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void StreamerNVirtual(TBuffer& b)


Author: Rene Brun 12/12/94
Last update: root/hist:$Name: $:$Id: TAxis.cxx,v 1.25 2002/01/12 08:43:07 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *


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