TGaxis Class Reference

The axis painter class.

Instances of this class are generated by the histograms and graphs painting classes when TAxis are drawn. TGaxis is the "painter class"of TAxis. Therefore it is mainly used via TAxis, even if is some occasion it can be used directly to draw an axis which is not part of a graph or an instance. For instance to draw an extra scale on a plot.

• Basic definition
• Definition with a function
• Logarithmic axis
• Blank axis
• Tick marks' orientation
• Tick marks' size
• Labels' positionning
• Labels' orientation
• Labels' position on tick marks
• Labels' format
• Alphanumeric labels
• Number of divisions optimisation
• Maximum Number of Digits for the axis labels
• Optional grid
• Time axis

Basic definition

A TGaxis is defined the following way:

TGaxis::TGaxis(Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax,
               Double_t wmin, Double_t wmax, Int_t ndiv, Option_t *chopt,
               Double_t gridlength)

Where:

• xmin : X origin coordinate in user's coordinates space.
• xmax : X end axis coordinate in user's coordinates space.
• ymin : Y origin coordinate in user's coordinates space.
• ymax : Y end axis coordinate in user's coordinates 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.:
    • ndiv=0 –> no tick marks.
    • ndiv=2 –> 2 divisions, one tick mark in the middle of the axis.
• chopt : Drawing options (see below).
• gridlength: grid length on main tick marks.

The example below generates various kind of axis.

{
   TCanvas *c1 = new TCanvas("c1","Examples of TGaxis",10,10,700,500);

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

   TGaxis *axis1 = new TGaxis(-4.5,-0.2,5.5,-0.2,-6,8,510,"");
   axis1->SetName("axis1");
   axis1->Draw();

   TGaxis *axis2 = new TGaxis(-4.5,0.2,5.5,0.2,0.001,10000,510,"G");
   axis2->SetName("axis2");
   axis2->Draw();

   TGaxis *axis3 = new TGaxis(-9,-0.8,-9,0.8,-8,8,50510,"");
   axis3->SetName("axis3");
   axis3->Draw();

   TGaxis *axis4 = new TGaxis(-7,-0.8,-7,0.8,1,10000,50510,"G");
   axis4->SetName("axis4");
   axis4->Draw();

   TGaxis *axis5 = new TGaxis(-4.5,-0.6,5.5,-0.6,1.2,1.32,80506,"-+");
   axis5->SetName("axis5");
   axis5->SetLabelSize(0.03);
   axis5->SetTextFont(72);
   axis5->SetLabelOffset(0.025);

   axis5->Draw();

   TGaxis *axis6 = new TGaxis(-4.5,0.6,5.5,0.6,100,900,50510,"-");
   axis6->SetName("axis6");
   axis6->Draw();

   TGaxis *axis7 = new TGaxis(8,-0.8,8,0.8,0,9000,50510,"+L");
   axis7->SetName("axis7");
   axis7->SetLabelOffset(0.01);
   axis7->Draw();

   //one can make axis going top->bottom. However because of a long standing
   //problem, the two x values should not be equal
   TGaxis *axis8 = new TGaxis(6.5,0.8,6.499,-0.8,0,90,50510,"-");
   axis8->SetName("axis8");
   axis8->Draw();
   return c1;
}

Definition with a function

Instead of the wmin,wmax arguments of the normal definition, the name of a TF1 function can be specified. This function will be used to map the user coordinates to the axis values and ticks.

A TGaxis is defined the following way:

TGaxis::TGaxis(Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax,
               const char *func, Int_t ndiv,   Option_t *chopt,
               Double_t gridlength)

Where:

• xmin : X origin coordinate in user's coordinates space.
• xmax : X end axis coordinate in user's coordinates space.
• ymin : Y origin coordinate in user's coordinates space.
• ymax : Y end axis coordinate in user's coordinates space.
• func : function defining axis labels and tick marks.
• 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.:
    • ndiv=0 –> no tick marks.
    • ndiv=2 –> 2 divisions, one tick mark in the middle of the axis.
• chopt : Drawing options (see below).
• gridlength: grid length on main tick marks.

Examples:

{
   TCanvas *c2 = new TCanvas("c2","c2",10,10,700,500);

   gStyle->SetOptStat(0);

   TH2F *h2 = new TH2F("h","Axes",100,0,10,100,-2,2);
   h2->Draw();

   TF1 *f1=new TF1("f1","-x",-10,10);
   TGaxis *A1 = new TGaxis(0,2,10,2,"f1",510,"-");
   A1->SetTitle("axis with decreasing values");
   A1->Draw();

   TF1 *f2=new TF1("f2","exp(x)",0,2);
   TGaxis *A2 = new TGaxis(1,1,9,1,"f2");
   A2->SetTitle("exponential axis");
   A2->SetLabelSize(0.03);
   A2->SetTitleSize(0.03);
   A2->SetTitleOffset(1.2);
   A2->Draw();

   TF1 *f3=new TF1("f3","log10(x)",1,1000);
   TGaxis *A3 = new TGaxis(2,-2,2,0,"f3",505,"G");
   A3->SetTitle("logarithmic axis");
   A3->SetLabelSize(0.03);
   A3->SetTitleSize(0.03);
   A3->SetTitleOffset(1.2);
   A3->Draw();
   return c2;
}

Logarithmic axis

By default axis are linear. To define a TGaxis as logarithmic, it is enough to create it with the option "G".

When plotting an histogram or a graph the logarithmic scale can be set using:

• gPad->SetLogx(1); set the logarithmic scale on the X axis
• gPad->SetLogy(1); set the logarithmic scale on the Y axis

When the SetMoreLogLabels() method is called more labels are drawn when in logarithmic scale and there is a small number of decades (less than 3).

Blank axis

To draw only the axis tick marks without the axis body, it is enough to specify the option "B". It useful to superpose axis.

Tick marks' orientation

By default tick marks are drawn on the positive side of the axis, except for vertical axis for which the default is negative. The chop parameter allows to control the tick marks orientation:

• chopt = "+": tick marks are drawn on Positive side. (default)
• chopt ="-": tick mark are drawn on the negative side.
• chopt = "+-": tick marks are drawn on both sides of the axis.
• chopt = "U": Unlabelled axis, default is labeled.

Tick marks' size

By default, tick marks have a length equal to 3 per cent of the axis length. When the option "S" is specified, the length of the tick marks is equal to fTickSize*axis_length, where fTickSize may be set via TGaxis::SetTickSize.

When plotting an histogram h the tick marks size can be changed using:

• h->GetXaxis()->SetTickLength(0.02); set the tick length for the X axis
• gStyle->SetTickLength(0.02,"x"); set the tick length for the X axis of all histograms drawn after this instruction.

A good way to remove tick marks on an axis is to set the tick length to 0: h->GetXaxis()->SetTickLength(0.);

Labels' positionning

Labels are normally drawn on side opposite to tick marks. However the option "=" allows to draw them on the same side.

Labels' orientation

By default axis labels are drawn parallel to the axis. However if the axis is vertical then are drawn perpendicular to the axis.

Labels' position on tick marks

By default axis labels are centered on tick marks. However, for vertical axis, they are right adjusted. The chop parameter allows to control the labels' position on tick marks:

• 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.

Labels' format

Blank characters are stripped, and then the label is correctly aligned. the dot, if last character of the string, is also stripped, unless the option "." (a dot, or period) is specified. if SetDecimals(kTRUE) has been called all labels have the same number of decimals after the "." The same is true if gStyle->SetStripDecimals(kFALSE) has been called.

In the following, we have some parameters, like tick marks length and characters height (in percentage of the length of the axis (user's coordinates)) 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 %

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).

TGaxis::SetExponentOffset(Float_t xoff, Float_t yoff, Option_t *axis) is static function to set X and Y offset of the axis 10^n notation. It is in % of the pad size. It can be negative. axis specifies which axis ("x" or/and "y"), default is "x" if axis = "xz" set the two axes

Alphanumeric labels

Axis labels can be any alphanumeric character strings. Such axis can be produced only with histograms because the labels'definition is stored in TAxis. The following example demonstrates how to create such labels.

// 2-D histograms with alphanumeric labels
// author; Rene Brun
TCanvas *hlabels2()
{
   const Int_t nx = 12;
   const Int_t ny = 20;
   const char *month[nx]  = {"January","February","March","April","May",
      "June","July","August","September","October","November",
      "December"};
   const char *people[ny] = {"Jean","Pierre","Marie","Odile","Sebastien",
      "Fons","Rene","Nicolas","Xavier","Greg","Bjarne","Anton",
      "Otto","Eddy","Peter","Pasha","Philippe","Suzanne","Jeff",
      "Valery"};
   TCanvas *c1 = new TCanvas("c1","demo bin labels",10,10,600,600);
   c1->SetGrid();
   c1->SetLeftMargin(0.15);
   c1->SetBottomMargin(0.15);
   TH2F *h = new TH2F("h","test",3,0,3,2,0,2);
   h->SetCanExtend(TH1::kAllAxes);
   h->SetStats(0);
   gRandom->SetSeed();
   for (Int_t i=0;i<15000;i++) {
      Int_t rx = gRandom->Rndm()*nx;
      Int_t ry = gRandom->Rndm()*ny;
      h->Fill(people[ry],month[rx],1);
   }
   h->LabelsDeflate("X");
   h->LabelsDeflate("Y");
   h->LabelsOption("v");
   h->Draw("text");

   TPaveText *pt = new TPaveText(0.6,0.85,0.98,0.98,"brNDC");
   pt->SetFillColor(18);
   pt->SetTextAlign(12);
   pt->AddText("Use the axis Context Menu LabelsOption");
   pt->AddText(" \"a\"   to sort by alphabetic order");
   pt->AddText(" \">\"   to sort by decreasing values");
   pt->AddText(" \"<\"   to sort by increasing values");
   pt->Draw();
   return c1;
}

Because the alphanumeric labels are usually longer that the numeric labels, their size is by default equal to 0.66666 * the_numeric_labels_size.

Number of divisions optimisation

By default the number of divisions on axis is optimised to show a coherent labelling of the main tick marks. The number of division (ndiv) is a composite integer given by:

ndiv = N1 + 100*N2 + 10000*N3

• N1 = number of 1st divisions.
• N2 = number of 2nd divisions.
• N3 = number of 3rd divisions.

by default the value of N1, N2 and N3 are maximum values. After optimisation the real number of divisions will be smaller or equal to these value. If one wants to bypass the optimisation, the option "N" should be given when the TGaxis is created. The option "I" also act on the number of division as it will force an integer labelling of the axis.

On an histogram pointer h the number of divisions can be set in different ways:.

• Directly on the histogram. The following will set the number of division to 510 on the X axis of h. To avoid optimization the number of divisions should be negative (ie: -510);

  h->SetNdivisions(510, "X");

• On the axis itself:

  h->GetXaxis()->SetNdivisions(510, kTRUE);

The first parameter is the number of division. If it is negative of if the second parameter is kFALSE then the number of divisions is not optimised. And other signature is also allowed:

h->GetXaxis()->SetNdivisions(10, 5, 0, kTRUE);

Maximum Number of Digits for the axis labels

The static function TGaxis::SetMaxDigits sets the maximum number of digits permitted for the axis labels above which the notation with 10^N is used. For example, to accept 6 digits number like 900000 on an axis call TGaxis::SetMaxDigits(6). The default value is 5. fgMaxDigits must be greater than 0.

Optional grid

The option "W" allows to draw a grid on the primary tick marks. In case of a log axis, the grid is only drawn for the primary tick marks if the number of secondary and tertiary divisions is 0. SetGridLength() allows to define the length of the grid.

When plotting an histogram or a graph the grid can be set ON or OFF using:

• gPad->SetGridy(1); set the grid on the X axis
• gPad->SetGridx(1); set the grid on the Y axis
• gPad->SetGrid(1,1); set the grid on both axis.

Time axis

Axis labels may be considered as times, plotted in a defined time format. The format is set with SetTimeFormat(). The TGaxis minimum (wmin) and maximum (wmax) values are considered as two time values in seconds. The time axis will be spread around the time offset value (set with SetTimeOffset()). Actually it will go from TimeOffset+wminto TimeOffset+wmax

Usually time axis are created automatically via histograms, but one may also want to draw a time axis outside an "histogram context". This can be done thanks to the option "T" of TGaxis.

{
   c1 = new TCanvas("c1","Examples of TGaxis",10,10,700,100);
   c1->Range(-10,-1,10,1);

   TGaxis *axis = new TGaxis(-8,0.,8,0.,-100000,150000,2405,"tS");
   axis->SetLabelSize(0.3);
   axis->SetTickSize(0.2);

   TDatime da(2003,02,28,12,00,00);
   axis->SetTimeOffset(da.Convert());
   axis->SetTimeFormat("%d-%m-%Y");
   axis->Draw();
   return c1;
}

The following example compares what the system time function gmtime and localtime give with what gives TGaxis. It can be used as referenced test to check if the time option of TGaxis is working properly.

// This example compares what the system time function gmtime and localtime give
// with what gives TGaxis. It can be used as referenced test to check if TGaxis
// is working properly.
// The original code was developped by Philippe Gras (CEA Saclay. IRFU/SEDI)
//Author: Philippe Gras, Bertrand Bellenot, Olivier Couet

#if defined(G__WIN32) && defined(__CINT__) && !defined(__MAKECINT__)
{
   // timeonaxis3.C has to be run in compiled mode on Windows.
   // the following code does it.

   gSystem->CompileMacro("timeonaxis3.C");
   timeonaxis3();
}
#else

#include "TAxis.h"
#include "TGaxis.h"
#include "TCanvas.h"
#include "TString.h"
#include "TLine.h"
#include "TLatex.h"
#include <time.h>
#include <stdio.h>

TString stime(time_t* t, bool utc = false, bool display_time_zone = true) {
   struct tm* tt;
   if (utc) tt = gmtime(t);
   else     tt = localtime(t);
   char buf[256];
   if (display_time_zone) strftime(buf, sizeof(buf), "%H:%M:%S %Z", tt);
   else                   strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tt);
   return TString(buf);
}


TCanvas * timeonaxis3() {
   double f = 1.8;

   TCanvas* c = new TCanvas;

   TLatex* tex1 = new TLatex;
   tex1->SetNDC();
   tex1->SetTextFont(102);
   tex1->SetTextSize(0.07*f);

   TLatex* tex3 = new TLatex;
   tex3->SetNDC();
   tex3->SetTextFont(102);
   tex3->SetTextSize(0.07*f);
   tex3->SetTextColor(kBlue+2);

   TLatex* tex2 = new TLatex;
   tex2->SetNDC();
   tex2->SetTextFont(102);
   tex2->SetTextSize(0.07*f);
   tex2->SetTextColor(kOrange+3);

   time_t offset[] = {0,                   0, 1325376000, 1341100800};
   time_t t[]      = {1331150400, 1336417200,          0, 36000};

   c->SetTopMargin(0); c->SetBottomMargin(0);
   c->SetLeftMargin(0); c->SetRightMargin(0);
   c->Divide(2, 4, -1, -1);
   TLine l;
   l.DrawLine(0.5, 0, 0.5, 1.);

   for(int i = 0; i < 4; ++i){
      for(int gmt = 0; gmt < 2; ++gmt){
         const char* opt = (gmt ? "gmt" : "local");
         TVirtualPad* p = c->cd(2*i + gmt + 1);
         p->SetTopMargin(0); p->SetBottomMargin(0);
         p->SetLeftMargin(0); p->SetRightMargin(0);
         p->SetFillStyle(4000);

         TGaxis* ga = new TGaxis (.4, .25, 5., .25, t[i], t[i] + 1,  1, "t");
         ga->SetTimeFormat("TGaxis label: #color[2]{%Y-%m-%d %H:%M:%S}");
         ga->SetLabelFont(102);
         ga->SetLabelColor(kBlue+2);

         ga->SetTimeOffset(offset[i], opt);
         ga->SetLabelOffset(0.04*f);
         ga->SetLabelSize(0.07*f);
         ga->SetLineColor(0);
         ga->Draw();

         // Get offset string of axis time format: there is not acccessor
         // to time format in TGaxis.
         // Assumes TAxis use the same format.
         TAxis a(10, 0, 1600000000);
         a.SetTimeOffset(offset[i], opt);
         const char* offsettimeformat = a.GetTimeFormat();

         char buf[256];
         if (offset[i] < t[i]) {
            sprintf(buf, "#splitline{%s, %s}{offset: %ld, option %s}",
                    stime(t+i).Data(), stime(t+i, true).Data(), offset[i], opt);
         } else {
            int h = t[i] / 3600;
            int m = (t[i] - 3600 * h) / 60 ;
            int s = (t[i] - h * 3600 - m * 60);
            sprintf(buf, "#splitline{%d h %d m %d s}{offset: %s, option %s}",
                    h, m, s, stime(offset + i, gmt).Data(), opt);
         }
         tex1->DrawLatex(.01, .75, buf);
         tex2->DrawLatex(.01, .50, offsettimeformat);
         time_t t_ = t[i] + offset[i];
         sprintf(buf, "Expecting:    #color[2]{%s}", stime(&t_, gmt, false).Data());
         tex3->DrawLatex(.01, .24, buf);
         if(i > 0) l.DrawLine(0, 0.95, 1, 0.95);
      }
   }
   return c;
}
#endif

The following macro illustrates the use, with histograms axis, of the time mode on the axis with different time intervals and time formats.

#include <time.h>

TCanvas *timeonaxis()
{
// This macro illustrates the use of the time mode on the axis
// with different time intervals and time formats. It's result can
// be seen begin_html <a href="gif/timeonaxis.gif">here</a> end_html
// Through all this script, the time is expressed in UTC. some
// information about this format (and others like GPS) may be found at
// begin_html <a href="http://tycho.usno.navy.mil/systime.html">http://tycho.usno.navy.mil/systime.html</a> end_html
//  or
// begin_html <a href="http://www.topology.org/sci/time.html">http://www.topology.org/sci/time.html</a> end_html
//
// The start time is : almost NOW (the time at which the script is executed)
// actualy, the nearest preceding hour beginning.
// The time is in general expressed in UTC time with the C time() function
// This will obviously most of the time not be the time displayed on your watch
// since it is universal time. See the C time functions for converting this time
// into more useful structures.
//Author: Damir Buskulic

   time_t script_time;
   script_time = time(0);
   script_time = 3600*(int)(script_time/3600);

// The time offset is the one that will be used by all graphs.
// If one changes it, it will be changed even on the graphs already defined
   gStyle->SetTimeOffset(script_time);

   TCanvas *ct = new TCanvas("ct","Time on axis",10,10,700,900);
   ct->Divide(1,3);
   ct->SetFillColor(28);

   int i;

//======= Build a signal : noisy damped sine ======
//        Time interval : 30 minutes

   gStyle->SetTitleH(0.08);
   float noise;
   TH1F *ht = new TH1F("ht","Love at first sight",3000,0.,2000.);
   for (i=1;i<3000;i++) {
      noise = gRandom->Gaus(0,120);
      if (i>700) {
         noise += 1000*sin((i-700)*6.28/30)*exp((double)(700-i)/300);
      }
      ht->SetBinContent(i,noise);
   }
   ct->cd(1);
   gPad->SetFillColor(41);
   gPad->SetFrameFillColor(33);
   ht->SetLineColor(2);
   ht->GetXaxis()->SetLabelSize(0.05);
   ht->Draw();
// Sets time on the X axis
// The time used is the one set as time offset added to the value
// of the axis. This is converted into day/month/year hour:min:sec and
// a reasonnable tick interval value is chosen.
   ht->GetXaxis()->SetTimeDisplay(1);

//======= Build a simple graph beginning at a different time ======
//        Time interval : 5 seconds

   float x[100], t[100];
   for (i=0;i<100;i++) {
      x[i] = sin(i*4*3.1415926/50)*exp(-(double)i/20);
      t[i] = 6000+(double)i/20;
   }
   TGraph *gt = new TGraph(100,t,x);
   gt->SetTitle("Politics");
   ct->cd(2);
   gPad->SetFillColor(41);
   gPad->SetFrameFillColor(33);
   gt->SetFillColor(19);
   gt->SetLineColor(5);
   gt->SetLineWidth(2);
   gt->Draw("AL");
   gt->GetXaxis()->SetLabelSize(0.05);
// Sets time on the X axis
   gt->GetXaxis()->SetTimeDisplay(1);
   gPad->Modified();

//======= Build a second simple graph for a very long time interval ======
//        Time interval : a few years

   float x2[10], t2[10];
   for (i=0;i<10;i++) {
      x2[i] = gRandom->Gaus(500,100)*i;
      t2[i] = i*365*86400;
   }
   TGraph *gt2 = new TGraph(10,t2,x2);
   gt2->SetTitle("Number of monkeys on the moon");
   ct->cd(3);
   gPad->SetFillColor(41);
   gPad->SetFrameFillColor(33);
   gt2->SetFillColor(19);
   gt2->SetMarkerColor(4);
   gt2->SetMarkerStyle(29);
   gt2->SetMarkerSize(1.3);
   gt2->Draw("AP");
   gt2->GetXaxis()->SetLabelSize(0.05);
// Sets time on the X axis
   gt2->GetXaxis()->SetTimeDisplay(1);
//
// One can choose a different time format than the one chosen by default
// The time format is the same as the one of the C strftime() function
// It's a string containing the following formats :
//    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
//      %Y year with 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)
//      %% %
// The other characters are output as is.

   gt2->GetXaxis()->SetTimeFormat("y. %Y %F2000-01-01 00:00:00");
   gPad->Modified();
   return ct;
}

An other example showing how to define the time offset as 2003, January 1st using histograms axis.

TCanvas *timeonaxis2() {
   // Define the time offset as 2003, January 1st
   //Author: Olivier Couet

   TCanvas *ct2 = new TCanvas("ct2","ct2",10,10,700,500);

   TDatime T0(2003, 1, 1, 0, 0, 0);
   int X0 = T0.Convert();
   gStyle->SetTimeOffset(X0);

   // Define the lowest histogram limit as 2002, September 23rd
   TDatime T1(2002, 9, 23, 0, 0, 0);
   int X1 = T1.Convert()-X0;

   // Define the highest histogram limit as 2003, March 7th
   TDatime T2(2003, 3, 7, 0, 0, 0);
   int X2 = T2.Convert(1)-X0;

   TH1F * h1 = new TH1F("h1","test",100,X1,X2);

   TRandom r;
   for (Int_t i=0;i<30000;i++) {
      Double_t noise = r.Gaus(0.5*(X1+X2),0.1*(X2-X1));
      h1->Fill(noise);
   }

   h1->GetXaxis()->SetTimeDisplay(1);
   h1->GetXaxis()->SetLabelSize(0.03);
   h1->GetXaxis()->SetTimeFormat("%Y/%m/%d");
   h1->Draw();
   return ct2;
}

Definition at line 39 of file TGaxis.h.

Public Member Functions
	TGaxis ()
	TGaxis (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax, Double_t wmin, Double_t wmax, Int_t ndiv=510, Option_t *chopt="", Double_t gridlength=0)
	TGaxis normal constructor. More...
	TGaxis (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax, const char *funcname, Int_t ndiv=510, Option_t *chopt="", Double_t gridlength=0)
	Constructor with a TF1 to map axis values. More...
virtual	~TGaxis ()
	TGaxis default destructor. More...
virtual void	AdjustBinSize (Double_t A1, Double_t A2, Int_t nold, Double_t &BinLow, Double_t &BinHigh, Int_t &nbins, Double_t &BinWidth)
	Internal method for axis labels optimisation. More...
virtual void	CenterLabels (Bool_t center=kTRUE)
	If center = kTRUE axis labels are centered in the center of the bin. More...
virtual void	CenterTitle (Bool_t center=kTRUE)
	If center = kTRUE axis title will be centered. The default is right adjusted. More...
virtual void	DrawAxis (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax, Double_t wmin, Double_t wmax, Int_t ndiv=510, Option_t *chopt="", Double_t gridlength=0)
	Draw this axis with new attributes. More...
Float_t	GetGridLength () const
TF1 *	GetFunction () const
Int_t	GetLabelColor () const
Int_t	GetLabelFont () const
Float_t	GetLabelOffset () const
Float_t	GetLabelSize () const
Float_t	GetTitleOffset () const
Float_t	GetTitleSize () const
virtual const char *	GetName () const
	Returns name of object. More...
virtual const char *	GetOption () const
virtual const char *	GetTitle () const
	Returns title of object. More...
Int_t	GetNdiv () const
Double_t	GetWmin () const
Double_t	GetWmax () const
Float_t	GetTickSize () const
virtual void	ImportAxisAttributes (TAxis *axis)
	Internal method to import TAxis attributes to this TGaxis. More...
void	LabelsLimits (const char *label, Int_t &first, Int_t &last)
	Internal method to find first and last character of a label. More...
virtual void	Paint (Option_t *chopt="")
	Draw this axis with its current attributes. More...
virtual void	PaintAxis (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax, Double_t &wmin, Double_t &wmax, Int_t &ndiv, Option_t *chopt="", Double_t gridlength=0, Bool_t drawGridOnly=kFALSE)
	Control function to draw an axis. More...
virtual void	Rotate (Double_t X, Double_t Y, Double_t CFI, Double_t SFI, Double_t XT, Double_t YT, Double_t &U, Double_t &V)
	Internal method to rotate axis coordinates. More...
virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save primitive as a C++ statement(s) on output stream out. More...
void	SetFunction (const char *funcname="")
	Specify a function to map the axis values. More...
void	SetOption (Option_t *option="")
	To set axis options. More...
void	SetLabelColor (Int_t labelcolor)
void	SetLabelFont (Int_t labelfont)
void	SetLabelOffset (Float_t labeloffset)
void	SetLabelSize (Float_t labelsize)
virtual void	SetName (const char *name)
	Change the name of the axis. More...
virtual void	SetNdivisions (Int_t ndiv)
virtual void	SetMoreLogLabels (Bool_t more=kTRUE)
	Set the kMoreLogLabels bit flag. More...
virtual void	SetNoExponent (Bool_t noExponent=kTRUE)
	Set the NoExponent flag. More...
virtual void	SetDecimals (Bool_t dot=kTRUE)
	Set the decimals flag. More...
void	SetTickSize (Float_t ticksize)
void	SetTickLength (Float_t ticklength)
void	SetGridLength (Float_t gridlength)
void	SetTimeFormat (const char *tformat)
	Change the format used for time plotting. More...
void	SetTimeOffset (Double_t toffset, Option_t *option="local")
	Change the time offset. If option = "gmt", set display mode to GMT. More...
virtual void	SetTitle (const char *title="")
	Change the title of the axis. More...
void	SetTitleOffset (Float_t titleoffset=1)
void	SetTitleSize (Float_t titlesize)
void	SetTitleFont (Int_t titlefont)
void	SetTitleColor (Int_t titlecolor)
void	SetWmin (Double_t wmin)
void	SetWmax (Double_t wmax)
Public Member Functions inherited from TLine
	TLine ()
	TLine (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Line normal constructor. More...
	TLine (const TLine &line)
	Line copy constructor. More...
virtual	~TLine ()
	Line default destructor. More...
void	Copy (TObject &line) const
	Copy this line to line. More...
virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Compute distance from point px,py to a line. More...
virtual TLine *	DrawLine (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Draw this line with new coordinates. More...
virtual TLine *	DrawLineNDC (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Draw this line with new coordinates in NDC. More...
virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to one event. More...
Double_t	GetX1 () const
Double_t	GetX2 () const
Double_t	GetY1 () const
Double_t	GetY2 () const
Bool_t	IsHorizontal ()
	Check whether this line is to be drawn horizontally. More...
Bool_t	IsVertical ()
	Check whether this line is to be drawn vertically. More...
virtual void	ls (Option_t *option="") const
	List this line with its attributes. More...
virtual void	PaintLine (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Draw this line with new coordinates. More...
virtual void	PaintLineNDC (Double_t u1, Double_t v1, Double_t u2, Double_t v2)
	Draw this line with new coordinates in NDC. More...
virtual void	Print (Option_t *option="") const
	Dump this line with its attributes. More...
virtual void	SetNDC (Bool_t isNDC=kTRUE)
	Set NDC mode on if isNDC = kTRUE, off otherwise. More...
void	SetHorizontal (Bool_t set=kTRUE)
	Force the line to be drawn horizontally. More...
void	SetVertical (Bool_t set=kTRUE)
	Force the line to be drawn vertically. More...
virtual void	SetX1 (Double_t x1)
virtual void	SetX2 (Double_t x2)
virtual void	SetY1 (Double_t y1)
virtual void	SetY2 (Double_t y2)
virtual Rectangle_t	GetBBox ()
	Return the bounding Box of the Line. More...
virtual TPoint	GetBBoxCenter ()
	Return the center of the BoundingBox as TPoint in pixels. More...
virtual void	SetBBoxCenter (const TPoint &p)
	Set center of the BoundingBox. More...
virtual void	SetBBoxCenterX (const Int_t x)
	Set X coordinate of the center of the BoundingBox. More...
virtual void	SetBBoxCenterY (const Int_t y)
	Set Y coordinate of the center of the BoundingBox. More...
virtual void	SetBBoxX1 (const Int_t x)
	Set left hand side of BoundingBox to a value (resize in x direction on left) More...
virtual void	SetBBoxX2 (const Int_t x)
	Set right hand side of BoundingBox to a value (resize in x direction on right) More...
virtual void	SetBBoxY1 (const Int_t y)
	Set top of BoundingBox to a value (resize in y direction on top) More...
virtual void	SetBBoxY2 (const Int_t y)
	Set bottom of BoundingBox to a value (resize in y direction on bottom) More...
Public Member Functions inherited from TObject
	TObject ()
	TObject (const TObject &object)
	TObject copy ctor. More...
TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...
virtual	~TObject ()
	TObject destructor. More...
virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...
virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...
virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...
virtual void	Clear (Option_t *="")
virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...
virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method. More...
virtual void	Delete (Option_t *option="")
	Delete this object. More...
virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...
virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...
virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current pad. More...
virtual void	Dump () const
	Dump contents of object on stdout. More...
virtual void	Execute (const char *method, const char *params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...
virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...
virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...
virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...
virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...
virtual const char *	GetIconName () const
	Returns mime type name of object. More...
virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...
virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...
virtual ULong_t	Hash () const
	Return hash value for this object. More...
virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...
virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...
virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...
virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...
virtual Bool_t	IsSortable () const
Bool_t	IsOnHeap () const
Bool_t	IsZombie () const
virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...
virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...
virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...
virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...
virtual void	SaveAs (const char *filename="", Option_t *option="") const
	Save this object in the file specified by filename. More...
virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...
virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...
virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...
void *	operator new (size_t sz)
void *	operator new[] (size_t sz)
void *	operator new (size_t sz, void *vp)
void *	operator new[] (size_t sz, void *vp)
void	operator delete (void *ptr)
	Operator delete. More...
void	operator delete[] (void *ptr)
	Operator delete []. More...
void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...
void	SetBit (UInt_t f)
void	ResetBit (UInt_t f)
Bool_t	TestBit (UInt_t f) const
Int_t	TestBits (UInt_t f) const
void	InvertBit (UInt_t f)
virtual void	Info (const char *method, const char *msgfmt,...) const
	Issue info message. More...
virtual void	Warning (const char *method, const char *msgfmt,...) const
	Issue warning message. More...
virtual void	Error (const char *method, const char *msgfmt,...) const
	Issue error message. More...
virtual void	SysError (const char *method, const char *msgfmt,...) const
	Issue system error message. More...
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message. More...
void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...
void	Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...
Public Member Functions inherited from TAttLine
	TAttLine ()
	AttLine default constructor. More...
	TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth)
	AttLine normal constructor. More...
virtual	~TAttLine ()
	AttLine destructor. More...
void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine. More...
Int_t	DistancetoLine (Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
	Compute distance from point px,py to a line. More...
virtual Color_t	GetLineColor () const
virtual Style_t	GetLineStyle () const
virtual Width_t	GetLineWidth () const
virtual void	Modify ()
	Change current line attributes if necessary. More...
virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values. More...
virtual void	SaveLineAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
	Save line attributes as C++ statement(s) on output stream out. More...
virtual void	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes. More...
virtual void	SetLineColor (Color_t lcolor)
virtual void	SetLineColorAlpha (Color_t lcolor, Float_t lalpha)
	Set a transparent line color. More...
virtual void	SetLineStyle (Style_t lstyle)
virtual void	SetLineWidth (Width_t lwidth)
	ClassDef (TAttLine, 2)
Public Member Functions inherited from TAttBBox2D
virtual	~TAttBBox2D ()
	ClassDef (TAttBBox2D, 0)
Public Member Functions inherited from TAttText
	TAttText ()
	TAttText (Int_t align, Float_t angle, Color_t color, Style_t font, Float_t tsize)
	AttText normal constructor. More...
virtual	~TAttText ()
	AttText destructor. More...
void	Copy (TAttText &atttext) const
	Copy this text attributes to a new TAttText. More...
virtual Short_t	GetTextAlign () const
virtual Float_t	GetTextAngle () const
virtual Color_t	GetTextColor () const
virtual Font_t	GetTextFont () const
virtual Float_t	GetTextSize () const
virtual void	Modify ()
	Change current text attributes if necessary. More...
virtual void	ResetAttText (Option_t *toption="")
	Reset this text attributes to default values. More...
virtual void	SaveTextAttributes (std::ostream &out, const char *name, Int_t alidef=12, Float_t angdef=0, Int_t coldef=1, Int_t fondef=61, Float_t sizdef=1)
	Save text attributes as C++ statement(s) on output stream out. More...
virtual void	SetTextAttributes ()
	Invoke the DialogCanvas Text attributes. More...
virtual void	SetTextAlign (Short_t align=11)
virtual void	SetTextAngle (Float_t tangle=0)
virtual void	SetTextColor (Color_t tcolor=1)
virtual void	SetTextColorAlpha (Color_t tcolor, Float_t talpha)
	Set a transparent marker color. More...
virtual void	SetTextFont (Font_t tfont=62)
virtual void	SetTextSize (Float_t tsize=1)
virtual void	SetTextSizePixels (Int_t npixels)
	Set the text size in pixels. More...

Static Public Member Functions
static Int_t	GetMaxDigits ()
	Static function returning fgMaxDigits (See SetMaxDigits). More...
static void	SetMaxDigits (Int_t maxd=5)
	Static function to set fgMaxDigits for axis. More...
static void	SetExponentOffset (Float_t xoff=0., Float_t yoff=0., Option_t *axis="xy")
	Static function to set X and Y offset of the axis 10^n notation. More...
Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...
static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...
static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...
static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

Protected Member Functions
	TGaxis (const TGaxis &)
	Exponent Y offset for the Y axis. More...
TGaxis &	operator= (const TGaxis &)
	Assignment operator. More...
Protected Member Functions inherited from TObject
void	MakeZombie ()
virtual void	DoError (int level, const char *location, const char *fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

Protected Attributes
Double_t	fWmin
Double_t	fWmax
Float_t	fGridLength
Float_t	fTickSize
Float_t	fLabelOffset
Float_t	fLabelSize
Float_t	fTitleOffset
Float_t	fTitleSize
Int_t	fNdiv
Int_t	fLabelColor
Int_t	fLabelFont
TString	fChopt
TString	fName
TString	fTitle
TString	fTimeFormat
TString	fFunctionName
TF1 *	fFunction
TAxis *	fAxis
	Pointer to function computing axis values. More...
Protected Attributes inherited from TLine
Double_t	fX1
Double_t	fY1
Double_t	fX2
Double_t	fY2
Protected Attributes inherited from TAttLine
Color_t	fLineColor
Style_t	fLineStyle
Width_t	fLineWidth
Protected Attributes inherited from TAttText
Float_t	fTextAngle
Float_t	fTextSize
Short_t	fTextAlign
Color_t	fTextColor
Font_t	fTextFont

Static Protected Attributes
static Int_t	fgMaxDigits = 5
	pointer to original TAxis axis (if any) More...
static Float_t	fXAxisExpXOffset = 0.
	Number of digits above which the 10>N notation is used. More...
static Float_t	fXAxisExpYOffset = 0.
	Exponent X offset for the X axis. More...
static Float_t	fYAxisExpXOffset = 0.
	Exponent Y offset for the X axis. More...
static Float_t	fYAxisExpYOffset = 0.
	Exponent X offset for the Y axis. More...

Additional Inherited Members
Public Types inherited from TLine
enum	{ kLineNDC = BIT(14), kVertical = BIT(15), kHorizontal = BIT(16) }
Public Types inherited from TObject
enum	EStatusBits {   kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4),   kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }
enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }
enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

#include <TGaxis.h>

Inheritance diagram for TGaxis:

Collaboration diagram for TGaxis:

Constructor & Destructor Documentation

TGaxis::TGaxis ( const TGaxis &  ax )

protected

Exponent Y offset for the Y axis.

Copy constructor.

Definition at line 529 of file TGaxis.cxx.

TGaxis::TGaxis

(

)

Referenced by DrawAxis().

TGaxis::TGaxis	(	Double_t	xmin,
		Double_t	ymin,
		Double_t	xmax,
		Double_t	ymax,
		Double_t	wmin,
		Double_t	wmax,
		Int_t	ndiv = 510,
		Option_t *	chopt = "",
		Double_t	gridlength = 0
	)

TGaxis normal constructor.

Definition at line 465 of file TGaxis.cxx.

TGaxis::TGaxis	(	Double_t	xmin,
		Double_t	ymin,
		Double_t	xmax,
		Double_t	ymax,
		const char *	funcname,
		Int_t	ndiv = 510,
		Option_t *	chopt = "",
		Double_t	gridlength = 0
	)

Constructor with a TF1 to map axis values.

Definition at line 494 of file TGaxis.cxx.

TGaxis::~TGaxis ( )

virtual

TGaxis default destructor.

Definition at line 587 of file TGaxis.cxx.

Member Function Documentation

void TGaxis::AdjustBinSize ( Double_t  A1, Double_t  A2, Int_t  nold, Double_t &  binLow, Double_t &  binHigh, Int_t &  nbins, Double_t &  binWidth  )

virtual

Internal method for axis labels optimisation.

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

Parameters

[in]	A1,A2	Old WMIN,WMAX
[out]	binLow,binHigh	New WMIN,WMAX
[in]	nold	Old NDIV (primary divisions)
[out]	nbins	New NDIV
[out]	binWidth	Bin width

Definition at line 2078 of file TGaxis.cxx.

Referenced by PaintAxis().

void TGaxis::CenterLabels ( Bool_t  center = kTRUE )

virtual

If center = kTRUE axis labels are centered in the center of the bin.

The default is to center on the primary tick marks. This option does not make sense if there are more bins than tick marks.

Definition at line 596 of file TGaxis.cxx.

void TGaxis::CenterTitle ( Bool_t  center = kTRUE )

virtual

If center = kTRUE axis title will be centered. The default is right adjusted.

Definition at line 606 of file TGaxis.cxx.

void TGaxis::DrawAxis ( Double_t  xmin, Double_t  ymin, Double_t  xmax, Double_t  ymax, Double_t  wmin, Double_t  wmax, Int_t  ndiv = 510, Option_t *  chopt = "", Double_t  gridlength = 0  )

virtual

Draw this axis with new attributes.

Definition at line 616 of file TGaxis.cxx.

TF1* TGaxis::GetFunction ( ) const

inline

Definition at line 89 of file TGaxis.h.

Float_t TGaxis::GetGridLength ( ) const

inline

Definition at line 88 of file TGaxis.h.

Referenced by SavePrimitive().

Int_t TGaxis::GetLabelColor ( ) const

inline

Definition at line 90 of file TGaxis.h.

Referenced by PaintAxis(), TPaletteAxis::SavePrimitive(), and SavePrimitive().

Int_t TGaxis::GetLabelFont ( ) const

inline

Definition at line 91 of file TGaxis.h.

Referenced by PaintAxis(), TPaletteAxis::SavePrimitive(), and SavePrimitive().

Float_t TGaxis::GetLabelOffset ( ) const

inline

Definition at line 92 of file TGaxis.h.

Referenced by TSpectrum2Painter::Paint(), PaintAxis(), TPaletteAxis::SavePrimitive(), and SavePrimitive().

Float_t TGaxis::GetLabelSize ( ) const

inline

Definition at line 93 of file TGaxis.h.

Referenced by PaintAxis(), TPaletteAxis::SavePrimitive(), and SavePrimitive().

Int_t TGaxis::GetMaxDigits ( )

static

Static function returning fgMaxDigits (See SetMaxDigits).

Definition at line 646 of file TGaxis.cxx.

virtual const char* TGaxis::GetName ( ) const

inlinevirtual

Returns name of object.

This default method returns the class name. Classes that give objects a name should override this method.

Reimplemented from TObject.

Definition at line 96 of file TGaxis.h.

Referenced by SavePrimitive().

Int_t TGaxis::GetNdiv ( ) const

inline

Definition at line 100 of file TGaxis.h.

virtual const char* TGaxis::GetOption ( ) const

inlinevirtual

Reimplemented from TObject.

Definition at line 97 of file TGaxis.h.

Float_t TGaxis::GetTickSize ( ) const

inline

Definition at line 103 of file TGaxis.h.

Referenced by TSpectrum2Painter::Paint(), and SavePrimitive().

virtual const char* TGaxis::GetTitle ( ) const

inlinevirtual

Returns title of object.

This default method returns the class title (i.e. description). Classes that give objects a title should override this method.

Reimplemented from TObject.

Definition at line 98 of file TGaxis.h.

Referenced by DrawAxis(), PaintAxis(), and SavePrimitive().

Float_t TGaxis::GetTitleOffset ( ) const

inline

Definition at line 94 of file TGaxis.h.

Referenced by PaintAxis(), TPaletteAxis::SavePrimitive(), and SavePrimitive().

Float_t TGaxis::GetTitleSize ( ) const

inline

Definition at line 95 of file TGaxis.h.

Referenced by PaintAxis(), TPaletteAxis::SavePrimitive(), and SavePrimitive().

Double_t TGaxis::GetWmax ( ) const

inline

Definition at line 102 of file TGaxis.h.

Double_t TGaxis::GetWmin ( ) const

inline

Definition at line 101 of file TGaxis.h.

void TGaxis::ImportAxisAttributes ( TAxis *  axis )

virtual

Internal method to import TAxis attributes to this TGaxis.

Definition at line 655 of file TGaxis.cxx.

Referenced by Rgl::Draw2DAxis(), TPaletteAxis::Paint(), THistPainter::PaintAxis(), THistPainter::PaintLegoAxis(), and TPaletteAxis::TPaletteAxis().

void TGaxis::LabelsLimits	(	const char *	label,
		Int_t &	first,
		Int_t &	last
	)

Internal method to find first and last character of a label.

Definition at line 2113 of file TGaxis.cxx.

Referenced by PaintAxis(), and TGraphPolargram::PaintPolarDivisions().

TGaxis & TGaxis::operator= ( const TGaxis &  ax )

protected

Assignment operator.

Definition at line 556 of file TGaxis.cxx.

void TGaxis::Paint ( Option_t *  chopt = "" )

virtual

Draw this axis with its current attributes.

Reimplemented from TLine.

Definition at line 684 of file TGaxis.cxx.

Referenced by Rgl::DrawPaletteAxis(), TSpectrum2Painter::Paint(), and TTreePerfStats::Paint().

void TGaxis::PaintAxis ( Double_t  xmin, Double_t  ymin, Double_t  xmax, Double_t  ymax, Double_t &  wmin, Double_t &  wmax, Int_t &  ndiv, Option_t *  chopt = "", Double_t  gridlength = 0, Bool_t  drawGridOnly = kFALSE  )

virtual

Control function to draw an axis.

Original authors: O.Couet C.E.Vandoni N.Cremel-Somon. Modified and converted to C++ class by Rene Brun.

Definition at line 705 of file TGaxis.cxx.

Referenced by Rgl::Draw2DAxis(), TSpectrum2Painter::Paint(), TPaletteAxis::Paint(), TASImage::Paint(), Paint(), THistPainter::PaintAxis(), TAxis3D::PaintAxis(), TGraphPainter::PaintGrapHist(), THistPainter::PaintLegoAxis(), and TGraphPolargram::PaintRadialDivisions().

void TGaxis::Rotate ( Double_t  X, Double_t  Y, Double_t  CFI, Double_t  SFI, Double_t  XT, Double_t  YT, Double_t &  U, Double_t &  V  )

virtual

Internal method to rotate axis coordinates.

Definition at line 2125 of file TGaxis.cxx.

Referenced by PaintAxis().

void TGaxis::SavePrimitive ( std::ostream &  out, Option_t *  option = ""  )

virtual

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

Reimplemented from TLine.

Definition at line 2135 of file TGaxis.cxx.

void TGaxis::SetDecimals ( Bool_t  dot = kTRUE )

virtual

Set the decimals flag.

By default, blank characters are stripped, and then the label is correctly aligned. The dot, if last character of the string, is also stripped, unless this option is specified. One can disable the option by calling axis.SetDecimals(kTRUE). Note the bit is set in fBits (as opposed to fBits2 in TAxis!)

Definition at line 2201 of file TGaxis.cxx.

void TGaxis::SetExponentOffset ( Float_t  xoff = 0., Float_t  yoff = 0., Option_t *  axis = "xy"  )

static

Static function to set X and Y offset of the axis 10^n notation.

It is in % of the pad size. It can be negative. axis specifies which axis ("x","y"), default = "x" if axis="xz" set the two axes

Definition at line 2367 of file TGaxis.cxx.

void TGaxis::SetFunction

(

const char *

funcname = ""

)

Specify a function to map the axis values.

Definition at line 2210 of file TGaxis.cxx.

void TGaxis::SetGridLength ( Float_t  gridlength )

inline

Definition at line 127 of file TGaxis.h.

void TGaxis::SetLabelColor ( Int_t  labelcolor )

inline

Definition at line 115 of file TGaxis.h.

Referenced by DrawAxis(), TMVA::StatDialogMVAEffs::DrawHistograms(), ImportAxisAttributes(), TTreePerfStats::Paint(), TAxis3D::PaintAxis(), TGraphPolargram::PaintRadialDivisions(), and TPaletteAxis::SetLabelColor().

void TGaxis::SetLabelFont ( Int_t  labelfont )

inline

Definition at line 116 of file TGaxis.h.

Referenced by DrawAxis(), ImportAxisAttributes(), TAxis3D::PaintAxis(), TGraphPolargram::PaintRadialDivisions(), and TPaletteAxis::SetLabelFont().

void TGaxis::SetLabelOffset ( Float_t  labeloffset )

inline

Definition at line 117 of file TGaxis.h.

Referenced by Rgl::Draw2DAxis(), DrawAxis(), ImportAxisAttributes(), TSpectrum2Painter::Paint(), TAxis3D::PaintAxis(), TGraphPainter::PaintGrapHist(), THistPainter::PaintLegoAxis(), TGraphPolargram::PaintRadialDivisions(), and TPaletteAxis::SetLabelOffset().

void TGaxis::SetLabelSize ( Float_t  labelsize )

inline

Definition at line 118 of file TGaxis.h.

Referenced by DrawAxis(), ImportAxisAttributes(), TTreePerfStats::Paint(), THistPainter::PaintAxis(), TAxis3D::PaintAxis(), TGraphPainter::PaintGrapHist(), TGraphPolargram::PaintRadialDivisions(), and TPaletteAxis::SetLabelSize().

void TGaxis::SetMaxDigits ( Int_t  maxd = 5 )

static

Static function to set fgMaxDigits for axis.

fgMaxDigits is the maximum number of digits permitted for the axis labels above which the notation with 10^N is used.For example, to accept 6 digits number like 900000 on an axis call TGaxis::SetMaxDigits(6). The default value is 5. fgMaxDigits must be greater than 0.

Definition at line 2233 of file TGaxis.cxx.

void TGaxis::SetMoreLogLabels ( Bool_t  more = kTRUE )

virtual

Set the kMoreLogLabels bit flag.

When this option is selected more labels are drawn when in logarithmic scale and there is a small number of decades (less than 3). Note that this option is automatically inherited from TAxis

Definition at line 2252 of file TGaxis.cxx.

void TGaxis::SetName ( const char *  name )

virtual

Change the name of the axis.

Definition at line 2242 of file TGaxis.cxx.

Referenced by TTreePerfStats::Paint().

virtual void TGaxis::SetNdivisions ( Int_t  ndiv )

inlinevirtual

Definition at line 121 of file TGaxis.h.

void TGaxis::SetNoExponent ( Bool_t  noExponent = kTRUE )

virtual

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).

Definition at line 2263 of file TGaxis.cxx.

void TGaxis::SetOption

(

Option_t *

option = ""

)

To set axis options.

Definition at line 2272 of file TGaxis.cxx.

Referenced by Rgl::Draw2DAxis(), THistPainter::PaintAxis(), TAxis3D::PaintAxis(), and THistPainter::PaintLegoAxis().

void TGaxis::SetTickLength ( Float_t  ticklength )

inline

Definition at line 126 of file TGaxis.h.

void TGaxis::SetTickSize ( Float_t  ticksize )

inline

Definition at line 125 of file TGaxis.h.

Referenced by DrawAxis(), ImportAxisAttributes(), THistPainter::PaintAxis(), TAxis3D::PaintAxis(), TGraphPainter::PaintGrapHist(), and SetTickLength().

void TGaxis::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)
• %% %

Definition at line 2307 of file TGaxis.cxx.

Referenced by Rgl::Draw2DAxis(), ImportAxisAttributes(), THistPainter::PaintAxis(), TAxis3D::PaintAxis(), and THistPainter::PaintLegoAxis().

void TGaxis::SetTimeOffset	(	Double_t	toffset,
		Option_t *	option = "local"
	)

Change the time offset. If option = "gmt", set display mode to GMT.

Definition at line 2331 of file TGaxis.cxx.

Referenced by SetTimeFormat().

void TGaxis::SetTitle ( const char *  title = "" )

virtual

Change the title of the axis.

Definition at line 2280 of file TGaxis.cxx.

Referenced by DrawAxis(), TMVA::StatDialogMVAEffs::DrawHistograms(), ImportAxisAttributes(), TTreePerfStats::Paint(), THistPainter::PaintAxis(), and TAxis3D::PaintAxis().

void TGaxis::SetTitleColor ( Int_t  titlecolor )

inline

Definition at line 134 of file TGaxis.h.

Referenced by TMVA::StatDialogMVAEffs::DrawHistograms(), and TTreePerfStats::Paint().

void TGaxis::SetTitleFont ( Int_t  titlefont )

inline

Definition at line 133 of file TGaxis.h.

void TGaxis::SetTitleOffset ( Float_t  titleoffset = 1 )

inline

Definition at line 131 of file TGaxis.h.

Referenced by DrawAxis(), ImportAxisAttributes(), TTreePerfStats::Paint(), TAxis3D::PaintAxis(), and TPaletteAxis::SetTitleOffset().

void TGaxis::SetTitleSize ( Float_t  titlesize )

inline

Definition at line 132 of file TGaxis.h.

Referenced by DrawAxis(), TMVA::StatDialogMVAEffs::DrawHistograms(), ImportAxisAttributes(), TAxis3D::PaintAxis(), and TPaletteAxis::SetTitleSize().

void TGaxis::SetWmax ( Double_t  wmax )

inline

Definition at line 136 of file TGaxis.h.

Referenced by TMVA::StatDialogMVAEffs::UpdateCanvases().

void TGaxis::SetWmin ( Double_t  wmin )

inline

Definition at line 135 of file TGaxis.h.

Member Data Documentation

TAxis* TGaxis::fAxis

protected

Pointer to function computing axis values.

Definition at line 59 of file TGaxis.h.

Referenced by ImportAxisAttributes(), operator=(), PaintAxis(), and TGaxis().

TString TGaxis::fChopt

protected

Definition at line 53 of file TGaxis.h.

Referenced by operator=(), Paint(), PaintAxis(), SavePrimitive(), SetOption(), and TGaxis().

TF1* TGaxis::fFunction

protected

Definition at line 58 of file TGaxis.h.

Referenced by GetFunction(), operator=(), PaintAxis(), SetFunction(), and TGaxis().

TString TGaxis::fFunctionName

protected

Definition at line 57 of file TGaxis.h.

Referenced by operator=(), PaintAxis(), SetFunction(), and TGaxis().

Int_t TGaxis::fgMaxDigits = 5

staticprotected

pointer to original TAxis axis (if any)

Definition at line 61 of file TGaxis.h.

Referenced by GetMaxDigits(), PaintAxis(), and SetMaxDigits().

Float_t TGaxis::fGridLength

protected

Definition at line 44 of file TGaxis.h.

Referenced by GetGridLength(), operator=(), Paint(), and TGaxis().

Int_t TGaxis::fLabelColor

protected

Definition at line 51 of file TGaxis.h.

Referenced by DrawAxis(), GetLabelColor(), operator=(), SavePrimitive(), and TGaxis().

Int_t TGaxis::fLabelFont

protected

Definition at line 52 of file TGaxis.h.

Referenced by DrawAxis(), GetLabelFont(), operator=(), SavePrimitive(), and TGaxis().

Float_t TGaxis::fLabelOffset

protected

Definition at line 46 of file TGaxis.h.

Referenced by DrawAxis(), GetLabelOffset(), operator=(), PaintAxis(), and TGaxis().

Float_t TGaxis::fLabelSize

protected

Definition at line 47 of file TGaxis.h.

Referenced by DrawAxis(), GetLabelSize(), operator=(), PaintAxis(), and TGaxis().

TString TGaxis::fName

protected

Definition at line 54 of file TGaxis.h.

Referenced by operator=(), SetName(), and TGaxis().

Int_t TGaxis::fNdiv

protected

Definition at line 50 of file TGaxis.h.

Referenced by GetNdiv(), operator=(), Paint(), SavePrimitive(), and TGaxis().

Float_t TGaxis::fTickSize

protected

Definition at line 45 of file TGaxis.h.

Referenced by DrawAxis(), GetTickSize(), operator=(), PaintAxis(), and TGaxis().

TString TGaxis::fTimeFormat

protected

Definition at line 56 of file TGaxis.h.

Referenced by operator=(), PaintAxis(), SetTimeFormat(), SetTimeOffset(), and TGaxis().

TString TGaxis::fTitle

protected

Definition at line 55 of file TGaxis.h.

Referenced by operator=(), SetTitle(), and TGaxis().

Float_t TGaxis::fTitleOffset

protected

Definition at line 48 of file TGaxis.h.

Referenced by DrawAxis(), GetTitleOffset(), operator=(), and TGaxis().

Float_t TGaxis::fTitleSize

protected

Definition at line 49 of file TGaxis.h.

Referenced by DrawAxis(), GetTitleSize(), operator=(), and TGaxis().

Double_t TGaxis::fWmax

protected

Definition at line 43 of file TGaxis.h.

Referenced by GetWmax(), operator=(), Paint(), SavePrimitive(), SetFunction(), and TGaxis().

Double_t TGaxis::fWmin

protected

Definition at line 42 of file TGaxis.h.

Referenced by GetWmin(), operator=(), Paint(), SavePrimitive(), SetFunction(), and TGaxis().

Float_t TGaxis::fXAxisExpXOffset = 0.

staticprotected

Number of digits above which the 10>N notation is used.

Definition at line 62 of file TGaxis.h.

Referenced by PaintAxis(), and SetExponentOffset().

Float_t TGaxis::fXAxisExpYOffset = 0.

staticprotected

Exponent X offset for the X axis.

Definition at line 63 of file TGaxis.h.

Referenced by PaintAxis(), and SetExponentOffset().

Float_t TGaxis::fYAxisExpXOffset = 0.

staticprotected

Exponent Y offset for the X axis.

Definition at line 64 of file TGaxis.h.

Referenced by PaintAxis(), and SetExponentOffset().

Float_t TGaxis::fYAxisExpYOffset = 0.

staticprotected

Exponent X offset for the Y axis.

Definition at line 65 of file TGaxis.h.

Referenced by PaintAxis(), and SetExponentOffset().

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The documentation for this class was generated from the following files:

• graf2d/graf/inc/TGaxis.h
• graf2d/graf/src/TGaxis.cxx