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Reference Guide
timeonaxis3.C File Reference

Detailed Description

View in nbviewer Open in SWAN 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 developed by Philippe Gras (CEA Saclay. IRFU/SEDI)

#if defined(G__WIN32) && defined(__CINT__) && !defined(__MAKECINT__)
// timeonaxis3.C has to be run in compiled mode on Windows.
// the following code does it.
#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), "%Y-%m-%d %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;
TLatex* tex3 = new TLatex;
TLatex* tex2 = new TLatex;
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);
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);
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->SetTimeOffset(offset[i], opt);
// Get offset string of axis time format: there is not accessor
// 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;
#define f(i)
Definition: RSha256.hxx:104
#define c(i)
Definition: RSha256.hxx:101
#define h(i)
Definition: RSha256.hxx:106
@ kOrange
Definition: Rtypes.h:67
@ kBlue
Definition: Rtypes.h:66
R__EXTERN TSystem * gSystem
Definition: TSystem.h:559
virtual void SetFillStyle(Style_t fstyle)
Set the fill area style.
Definition: TAttFill.h:39
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition: TAttLine.h:40
virtual void SetBottomMargin(Float_t bottommargin)
Set Pad bottom margin in fraction of the pad height.
Definition: TAttPad.cxx:99
virtual void SetLeftMargin(Float_t leftmargin)
Set Pad left margin in fraction of the pad width.
Definition: TAttPad.cxx:109
virtual void SetRightMargin(Float_t rightmargin)
Set Pad right margin in fraction of the pad width.
Definition: TAttPad.cxx:119
virtual void SetTopMargin(Float_t topmargin)
Set Pad top margin in fraction of the pad height.
Definition: TAttPad.cxx:129
virtual void SetTextColor(Color_t tcolor=1)
Set the text color.
Definition: TAttText.h:43
virtual void SetTextFont(Font_t tfont=62)
Set the text font.
Definition: TAttText.h:45
virtual void SetTextSize(Float_t tsize=1)
Set the text size.
Definition: TAttText.h:46
Class to manage histogram axis.
Definition: TAxis.h:30
The Canvas class.
Definition: TCanvas.h:23
The axis painter class.
Definition: TGaxis.h:23
void SetTimeFormat(const char *tformat)
Change the format used for time plotting.
Definition: TGaxis.cxx:2734
void SetLabelFont(Int_t labelfont)
Definition: TGaxis.h:105
void SetLabelOffset(Float_t labeloffset)
Definition: TGaxis.h:106
void SetTimeOffset(Double_t toffset, Option_t *option="local")
Change the time offset. If option = "gmt", set display mode to GMT.
Definition: TGaxis.cxx:2758
void SetLabelColor(Int_t labelcolor)
Definition: TGaxis.h:104
void SetLabelSize(Float_t labelsize)
Definition: TGaxis.h:107
To draw Mathematical Formula.
Definition: TLatex.h:18
TLatex * DrawLatex(Double_t x, Double_t y, const char *text)
Make a copy of this object with the new parameters And copy object attributes.
Definition: TLatex.cxx:1927
A simple line.
Definition: TLine.h:22
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:197
Basic string class.
Definition: TString.h:136
virtual int CompileMacro(const char *filename, Option_t *opt="", const char *library_name="", const char *build_dir="", UInt_t dirmode=0)
This method compiles and loads a shared library containing the code from the file "filename".
Definition: TSystem.cxx:2834
virtual void SetNDC(Bool_t isNDC=kTRUE)
Set NDC mode on if isNDC = kTRUE, off otherwise.
Definition: TText.cxx:813
TVirtualPad is an abstract base class for the Pad and Canvas classes.
Definition: TVirtualPad.h:51
static constexpr double s
auto * m
Definition: textangle.C:8
auto * tt
Definition: textangle.C:16
auto * l
Definition: textangle.C:4
auto * a
Definition: textangle.C:12
Philippe Gras, Bertrand Bellenot, Olivier Couet

Definition in file timeonaxis3.C.