Logo ROOT  
Reference Guide
TPaveLabel.cxx
Go to the documentation of this file.
1// @(#)root/graf:$Id$
2// Author: Rene Brun 17/10/95
3
4/*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#include <iostream>
13#include "TROOT.h"
14#include "TStyle.h"
15#include "TPaveLabel.h"
16#include "TLatex.h"
17#include "TVirtualPad.h"
18
20
21/** \class TPaveLabel
22\ingroup BasicGraphics
23
24A Pave (see TPave) with a text centered in the Pave.
25
26\image html graf_pavelabel.png
27*/
28
29////////////////////////////////////////////////////////////////////////////////
30/// Pavelabel default constructor.
31
33{
34}
35
36////////////////////////////////////////////////////////////////////////////////
37/// Pavelabel normal constructor.
38///
39/// a PaveLabel is a Pave with a label centered in the Pave
40/// The Pave is by default defined bith bordersize=5 and option ="br".
41/// The text size is automatically computed as a function of the pave size.
42
44 :TPave(x1,y1,x2,y2,3,option), TAttText(22,0,1,gStyle->GetTextFont(),0.99)
45{
46 fLabel = label;
47}
48
49////////////////////////////////////////////////////////////////////////////////
50/// Pavelabel default destructor.
51
53{
54}
55
56////////////////////////////////////////////////////////////////////////////////
57/// Pavelabel copy constructor.
58
59TPaveLabel::TPaveLabel(const TPaveLabel &pavelabel) : TPave(pavelabel), TAttText(pavelabel)
60{
61 ((TPaveLabel&)pavelabel).Copy(*this);
62}
63
64////////////////////////////////////////////////////////////////////////////////
65/// Copy this pavelabel to pavelabel.
66
67void TPaveLabel::Copy(TObject &obj) const
68{
69 TPave::Copy(obj);
71 ((TPaveLabel&)obj).fLabel = fLabel;
72}
73
74////////////////////////////////////////////////////////////////////////////////
75/// Draw this pavelabel with its current attributes.
76
78{
79 Option_t *opt;
80 if (option && strlen(option)) opt = option;
81 else opt = GetOption();
82
83 AppendPad(opt);
84}
85
86////////////////////////////////////////////////////////////////////////////////
87/// Draw this pavelabel with new coordinates.
88
90{
91 TPaveLabel *newpavelabel = new TPaveLabel(x1,y1,x2,y2,label,option);
92 newpavelabel->SetBit(kCanDelete);
93 newpavelabel->AppendPad();
94 return newpavelabel;
95}
96
97////////////////////////////////////////////////////////////////////////////////
98/// Paint this pavelabel with its current attributes.
99
101{
102 // Convert from NDC to pad coordinates
104
105 PaintPaveLabel(fX1, fY1, fX2, fY2, GetLabel(), strlen(option)?option:GetOption());
106}
107
108////////////////////////////////////////////////////////////////////////////////
109/// Draw this pavelabel with new coordinates.
110
112 const char *label ,Option_t *option)
113{
114 if (!gPad) return;
115 Int_t nch = strlen(label);
116
117 // Draw the pave
118 TPave::PaintPave(x1,y1,x2,y2,GetBorderSize(),option);
119
120 Float_t nspecials = 0;
121 for (Int_t i=0;i<nch;i++) {
122 if (label[i] == '!') nspecials += 1;
123 if (label[i] == '?') nspecials += 1.5;
124 if (label[i] == '#') nspecials += 1;
125 if (label[i] == '`') nspecials += 1;
126 if (label[i] == '^') nspecials += 1.5;
127 if (label[i] == '~') nspecials += 1;
128 if (label[i] == '&') nspecials += 2;
129 if (label[i] == '\\') nspecials += 3; // octal characters very likely
130 }
131 nch -= Int_t(nspecials + 0.5);
132 if (nch <= 0) return;
133
134 // Draw label
135 Double_t wh = (Double_t)gPad->XtoPixel(gPad->GetX2());
136 Double_t hh = (Double_t)gPad->YtoPixel(gPad->GetY1());
137 if (wh==0||hh==0) return;
138 Double_t labelsize, textsize = GetTextSize();
139 Int_t automat = 0;
140 if (GetTextFont()%10 > 2) { // fixed size font specified in pixels
141 labelsize = GetTextSize();
142 } else {
143 if (TMath::Abs(textsize -0.99) < 0.001) automat = 1;
144 if (textsize == 0) { textsize = 0.99; automat = 1;}
145 Int_t ypixel = TMath::Abs(gPad->YtoPixel(y1) - gPad->YtoPixel(y2));
146 labelsize = textsize*ypixel/hh;
147 if (wh < hh) labelsize *= hh/wh;
148 }
149 TLatex latex;
150 latex.SetTextAngle(GetTextAngle());
151 latex.SetTextFont(GetTextFont());
152 latex.SetTextAlign(GetTextAlign());
153 latex.SetTextColor(GetTextColor());
154 latex.SetTextSize(labelsize);
155 if (automat) {
156 UInt_t w=0,h=0,w1=0;
157 latex.GetTextExtent(w,h,GetTitle());
158 if (!w) return;
159 labelsize = h/hh;
160 Double_t wxlabel = TMath::Abs(gPad->XtoPixel(x2) - gPad->XtoPixel(x1));
161 latex.GetTextExtent(w1,h,GetTitle());
162 while (w > 0.99*wxlabel) {
163 labelsize *= 0.99*wxlabel/w;
164 latex.SetTextSize(labelsize);
165 latex.GetTextExtent(w,h,GetTitle());
166 if (w==w1) break;
167 else w1=w;
168 }
169 if (h < 1) h = 1;
170 if (h==1) {
171 labelsize = Double_t(h)/hh;
172 if (wh < hh) labelsize *= hh/wh;
173 latex.SetTextSize(labelsize);
174 }
175 }
176 Int_t halign = GetTextAlign()/10;
177 Int_t valign = GetTextAlign()%10;
178 Double_t x = 0.5*(x1+x2);
179 if (halign == 1) x = x1 + 0.02*(x2-x1);
180 if (halign == 3) x = x2 - 0.02*(x2-x1);
181 Double_t y = 0.5*(y1+y2);
182 if (valign == 1) y = y1 + 0.02*(y2-y1);
183 if (valign == 3) y = y2 - 0.02*(y2-y1);
184 latex.PaintLatex(x, y, GetTextAngle(),labelsize,GetLabel());
185}
186
187////////////////////////////////////////////////////////////////////////////////
188/// Save primitive as a C++ statement(s) on output stream out
189
190void TPaveLabel::SavePrimitive(std::ostream &out, Option_t * /*= ""*/)
191{
192 char quote = '"';
193 out<<" "<<std::endl;
194 if (gROOT->ClassSaved(TPaveLabel::Class())) {
195 out<<" ";
196 } else {
197 out<<" TPaveLabel *";
198 }
199 TString s = fLabel.Data();
200 s.ReplaceAll("\"","\\\"");
201 if (fOption.Contains("NDC")) {
202 out<<"pl = new TPaveLabel("<<fX1NDC<<","<<fY1NDC<<","<<fX2NDC<<","<<fY2NDC
203 <<","<<quote<<s.Data()<<quote<<","<<quote<<fOption<<quote<<");"<<std::endl;
204 } else {
205 out<<"pl = new TPaveLabel("<<gPad->PadtoX(fX1)<<","<<gPad->PadtoY(fY1)<<","<<gPad->PadtoX(fX2)<<","<<gPad->PadtoY(fY2)
206 <<","<<quote<<s.Data()<<quote<<","<<quote<<fOption<<quote<<");"<<std::endl;
207 }
208 if (fBorderSize != 3) {
209 out<<" pl->SetBorderSize("<<fBorderSize<<");"<<std::endl;
210 }
211 SaveFillAttributes(out,"pl",19,1001);
212 SaveLineAttributes(out,"pl",1,1,1);
213 SaveTextAttributes(out,"pl",22,0,1,62,0);
214
215 out<<" pl->Draw();"<<std::endl;
216}
void Class()
Definition: Class.C:29
#define h(i)
Definition: RSha256.hxx:106
static const double x2[5]
static const double x1[5]
int Int_t
Definition: RtypesCore.h:45
double Double_t
Definition: RtypesCore.h:59
float Float_t
Definition: RtypesCore.h:57
const char Option_t
Definition: RtypesCore.h:66
#define ClassImp(name)
Definition: Rtypes.h:364
#define gROOT
Definition: TROOT.h:404
R__EXTERN TStyle * gStyle
Definition: TStyle.h:413
#define gPad
Definition: TVirtualPad.h:288
virtual void SaveFillAttributes(std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
Save fill attributes as C++ statement(s) on output stream out.
Definition: TAttFill.cxx:236
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.
Definition: TAttLine.cxx:273
Text Attributes class.
Definition: TAttText.h:18
virtual Float_t GetTextSize() const
Return the text size.
Definition: TAttText.h:36
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition: TAttText.h:42
virtual Short_t GetTextAlign() const
Return the text alignment.
Definition: TAttText.h:32
virtual Font_t GetTextFont() const
Return the text font.
Definition: TAttText.h:35
virtual Color_t GetTextColor() const
Return the text color.
Definition: TAttText.h:34
virtual void SetTextAngle(Float_t tangle=0)
Set the text angle.
Definition: TAttText.h:43
virtual Float_t GetTextAngle() const
Return the text angle.
Definition: TAttText.h:33
virtual void SetTextColor(Color_t tcolor=1)
Set the text color.
Definition: TAttText.h:44
virtual void SetTextFont(Font_t tfont=62)
Set the text font.
Definition: TAttText.h:46
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.
Definition: TAttText.cxx:375
virtual void SetTextSize(Float_t tsize=1)
Set the text size.
Definition: TAttText.h:47
void Copy(TAttText &atttext) const
Copy this text attributes to a new TAttText.
Definition: TAttText.cxx:299
Double_t fX1
X of 1st point.
Definition: TBox.h:28
Double_t fY2
Y of 2nd point.
Definition: TBox.h:31
Double_t fX2
X of 2nd point.
Definition: TBox.h:30
Double_t fY1
Y of 1st point.
Definition: TBox.h:29
To draw Mathematical Formula.
Definition: TLatex.h:18
virtual void PaintLatex(Double_t x, Double_t y, Double_t angle, Double_t size, const char *text)
Main drawing function.
Definition: TLatex.cxx:2066
Mother of all ROOT objects.
Definition: TObject.h:37
virtual void AppendPad(Option_t *option="")
Append graphics object to current pad.
Definition: TObject.cxx:107
void SetBit(UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.
Definition: TObject.cxx:696
@ kCanDelete
if object in a list can be deleted
Definition: TObject.h:58
A Pave (see TPave) with a text centered in the Pave.
Definition: TPaveLabel.h:20
virtual void PaintPaveLabel(Double_t x1, Double_t y1, Double_t x2, Double_t y2, const char *label, Option_t *option="")
Draw this pavelabel with new coordinates.
Definition: TPaveLabel.cxx:111
virtual ~TPaveLabel()
Pavelabel default destructor.
Definition: TPaveLabel.cxx:52
void Copy(TObject &pavelabel) const
Copy this pavelabel to pavelabel.
Definition: TPaveLabel.cxx:67
virtual TPaveLabel * DrawPaveLabel(Double_t x1, Double_t y1, Double_t x2, Double_t y2, const char *label, Option_t *option="")
Draw this pavelabel with new coordinates.
Definition: TPaveLabel.cxx:89
const char * GetTitle() const
Returns title of object.
Definition: TPaveLabel.h:43
const char * GetLabel() const
Definition: TPaveLabel.h:42
virtual void SavePrimitive(std::ostream &out, Option_t *option="")
Save primitive as a C++ statement(s) on output stream out.
Definition: TPaveLabel.cxx:190
TPaveLabel()
Pavelabel default constructor.
Definition: TPaveLabel.cxx:32
virtual void Paint(Option_t *option="")
Paint this pavelabel with its current attributes.
Definition: TPaveLabel.cxx:100
TString fLabel
Label written at the center of Pave.
Definition: TPaveLabel.h:23
virtual void Draw(Option_t *option="")
Draw this pavelabel with its current attributes.
Definition: TPaveLabel.cxx:77
A TBox with a bordersize and a shadow option.
Definition: TPave.h:19
Int_t GetBorderSize() const
Definition: TPave.h:54
virtual void ConvertNDCtoPad()
Convert pave coordinates from NDC to Pad coordinates.
Definition: TPave.cxx:139
Int_t fBorderSize
window box bordersize in pixels
Definition: TPave.h:26
Double_t fX2NDC
X2 point in NDC coordinates.
Definition: TPave.h:24
Option_t * GetOption() const
Definition: TPave.h:57
TString fOption
Pave style.
Definition: TPave.h:30
Double_t fY2NDC
Y2 point in NDC coordinates.
Definition: TPave.h:25
void Copy(TObject &pave) const
Copy this pave to pave.
Definition: TPave.cxx:186
Double_t fX1NDC
X1 point in NDC coordinates.
Definition: TPave.h:22
Double_t fY1NDC
Y1 point in NDC coordinates.
Definition: TPave.h:23
virtual void PaintPave(Double_t x1, Double_t y1, Double_t x2, Double_t y2, Int_t bordersize=4, Option_t *option="br")
Draw this pave with new coordinates.
Definition: TPave.cxx:314
Basic string class.
Definition: TString.h:136
const char * Data() const
Definition: TString.h:369
Bool_t Contains(const char *pat, ECaseCompare cmp=kExact) const
Definition: TString.h:624
virtual void GetTextExtent(UInt_t &w, UInt_t &h, const char *text) const
Return text extent for string text.
Definition: TText.cxx:587
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17
static constexpr double s
Short_t Abs(Short_t d)
Definition: TMathBase.h:120