Logo ROOT   6.08/07
Reference Guide
gaxis3.C
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1 /// \file
2 /// \ingroup tutorial_graphics
3 /// \notebook
4 /// Example illustrating how to modify individual labels of a TGaxis. The method
5 /// `ChangeLabel` allows to do that.
6 ///
7 /// The first parameter of this method is the label number to be modified. If
8 /// this number is negative labels are numbered from the last one. The other
9 /// parameters are (in order):
10 /// - the new angle value,
11 /// - the new size (0 erase the label),
12 /// - the new text alignment,
13 /// - the new label color,
14 /// = the new label text.
15 ///
16 /// \macro_image
17 /// \macro_code
18 ///
19 /// \author Olivier Couet
20 
21 void gaxis3() {
22  c1 = new TCanvas("c1","Examples of Gaxis",10,10,800,400);
23  c1->Range(-6,-0.1,6,0.1);
24 
25  TGaxis *axis = new TGaxis(-5.5,0.,5.5,0.,0.0,100,510,"");
26  axis->SetName("axis");
27  axis->SetTitle("Axis Title");
28  axis->SetTitleSize(0.05);
29  axis->SetTitleColor(kBlue);
30  axis->SetTitleFont(42);
31 
32  // Change the 1st label color to red.
33  axis->ChangeLabel(1,-1,-1,-1,2);
34 
35  // Erase the 3rd label
36  axis->ChangeLabel(3,-1,0.);
37 
38  // 5th label is drawn with an angle of 30 degrees
39  axis->ChangeLabel(5,30.,-1,0);
40 
41  // Change the text of the 6th label.
42  axis->ChangeLabel(6,-1,-1,-1,3,-1,"6th label");
43 
44  // Change the text of the 2nd label to the end.
45  axis->ChangeLabel(-2,-1,-1,-1,3,-1,"2nd to last label");
46 
47  axis->Draw();
48 }
virtual void SetName(const char *name)
Change the name of the axis.
Definition: TGaxis.cxx:2393
void SetTitleColor(Int_t titlecolor)
Definition: TGaxis.h:134
return c1
Definition: legend1.C:41
virtual void SetTitle(const char *title="")
Change the title of the axis.
Definition: TGaxis.cxx:2431
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:255
void SetTitleFont(Int_t titlefont)
Definition: TGaxis.h:133
void SetTitleSize(Float_t titlesize)
Definition: TGaxis.h:132
The axis painter class.
Definition: TGaxis.h:30
The Canvas class.
Definition: TCanvas.h:41
Definition: Rtypes.h:61
void ChangeLabel(Int_t labNum=0, Double_t labAngle=-1., Double_t labSize=-1., Int_t labAlign=-1, Int_t labColor=-1, Int_t labFont=-1, TString labText="")
Define new text attributes for the label number "labNum".
Definition: TGaxis.cxx:2302