Logo ROOT   6.08/07
Reference Guide
TLegendEntry.cxx
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1 // @(#)root/graf:$Id$
2 // Author: Matthew.Adam.Dobbs 06/09/99
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 <stdio.h>
13 
14 #include "TLegendEntry.h"
15 #include "TVirtualPad.h"
16 #include "TROOT.h"
17 #include "Riostream.h"
18 
20 
21 /** \class TLegendEntry
22 \ingroup BasicGraphics
23 
24 Storage class for one entry of a TLegend.
25 */
26 
27 ////////////////////////////////////////////////////////////////////////////////
28 /// TLegendEntry do-nothing default constructor
29 
31 {
32  fObject = 0;
33 }
34 
35 ////////////////////////////////////////////////////////////////////////////////
36 /// TLegendEntry normal constructor for one entry in a TLegend.
37 ///
38 /// obj is the object this entry will represent. If obj has
39 /// line/fill/marker attributes, then the TLegendEntry will display
40 /// these attributes.
41 ///
42 /// label is the text that will describe the entry, it is displayed using
43 /// TLatex, so may have a complex format.
44 ///
45 /// option may have values
46 /// - L draw line associated w/ TAttLine if obj inherits from TAttLine
47 /// - P draw polymarker assoc. w/ TAttMarker if obj inherits from TAttMarker
48 /// - F draw a box with fill associated w/ TAttFill if obj inherits TAttFill
49 /// default is object = "LPF"
50 
51 TLegendEntry::TLegendEntry(const TObject* obj, const char* label, Option_t* option )
52  :TAttText(0,0,0,0,0), TAttLine(1,1,1), TAttFill(0,0), TAttMarker(1,21,1)
53 {
54  fObject = 0;
55  if ( !label && obj ) fLabel = obj->GetTitle();
56  else fLabel = label;
57  fOption = option;
58  if (obj) SetObject((TObject*)obj);
59 }
60 
61 ////////////////////////////////////////////////////////////////////////////////
62 /// TLegendEntry copy constructor
63 
64 TLegendEntry::TLegendEntry( const TLegendEntry &entry ) : TObject(entry), TAttText(entry), TAttLine(entry), TAttFill(entry), TAttMarker(entry)
65 {
66  ((TLegendEntry&)entry).Copy(*this);
67 }
68 
69 ////////////////////////////////////////////////////////////////////////////////
70 /// TLegendEntry default destructor
71 
73 {
74  fObject = 0;
75 }
76 
77 ////////////////////////////////////////////////////////////////////////////////
78 /// copy this TLegendEntry into obj
79 
80 void TLegendEntry::Copy( TObject &obj ) const
81 {
82  TObject::Copy(obj);
87  ((TLegendEntry&)obj).fObject = fObject;
88  ((TLegendEntry&)obj).fLabel = fLabel;
89  ((TLegendEntry&)obj).fOption = fOption;
90 }
91 
92 ////////////////////////////////////////////////////////////////////////////////
93 /// dump this TLegendEntry to std::cout
94 
96 {
98  std::cout << "TLegendEntry: Object ";
99  if ( fObject ) output = fObject->GetName();
100  else output = "NULL";
101  std::cout << output << " Label ";
102  if ( fLabel ) output = fLabel.Data();
103  else output = "NULL";
104  std::cout << output << " Option ";
105  if (fOption ) output = fOption.Data();
106  else output = "NULL";
107  std::cout << output << std::endl;
108 }
109 
110 ////////////////////////////////////////////////////////////////////////////////
111 /// Save this TLegendEntry as C++ statements on output stream out
112 /// to be used with the SaveAs .C option
113 
114 void TLegendEntry::SaveEntry(std::ostream &out, const char* name )
115 {
116  char quote = '"';
117  if ( gROOT->ClassSaved( TLegendEntry::Class() ) ) {
118  out << " entry=";
119  } else {
120  out << " TLegendEntry *entry=";
121  }
122  TString objname = "NULL";
123  if ( fObject ) objname = fObject->GetName();
124  out << name << "->AddEntry("<<quote<<objname<<quote<<","<<quote<<
125  fLabel.Data()<<quote<<","<<quote<<fOption.Data()<<quote<<");"<<std::endl;
126  SaveFillAttributes(out,"entry",0,0);
127  SaveLineAttributes(out,"entry",0,0,0);
128  SaveMarkerAttributes(out,"entry",0,0,0);
129  SaveTextAttributes(out,"entry",0,0,0,0,0);
130 }
131 
132 ////////////////////////////////////////////////////////////////////////////////
133 /// (re)set the obj pointed to by this entry
134 
136 {
137  if ( ( fObject && fLabel == fObject->GetTitle() ) || !fLabel ) {
138  if (obj) fLabel = obj->GetTitle();
139  }
140  fObject = obj;
141 }
142 
143 ////////////////////////////////////////////////////////////////////////////////
144 /// (re)set the obj pointed to by this entry
145 
146 void TLegendEntry::SetObject( const char* objectName)
147 {
148  TObject* obj = 0;
149  TList* padprimitives = gPad->GetListOfPrimitives();
150  if (padprimitives) obj = padprimitives->FindObject( objectName );
151  if (obj) SetObject( obj );
152 }
const char Option_t
Definition: RtypesCore.h:62
Storage class for one entry of a TLegend.
Definition: TLegendEntry.h:36
#define gROOT
Definition: TROOT.h:364
Basic string class.
Definition: TString.h:137
void Copy(TAttMarker &attmarker) const
Copy this marker attributes to a new TAttMarker.
Definition: TAttMarker.cxx:194
virtual void SaveEntry(std::ostream &out, const char *name)
Save this TLegendEntry as C++ statements on output stream out to be used with the SaveAs ...
const char * Class
Definition: TXMLSetup.cxx:64
virtual TObject * FindObject(const char *name) const
Find an object in this list using its name.
Definition: TList.cxx:497
Marker Attributes class.
Definition: TAttMarker.h:24
virtual void SetObject(TObject *obj)
(re)set the obj pointed to by this entry
Fill Area Attributes class.
Definition: TAttFill.h:24
void Copy(TAttLine &attline) const
Copy this line attributes to a new TAttLine.
Definition: TAttLine.cxx:162
virtual void Copy(TObject &object) const
Copy this to obj.
Definition: TObject.cxx:123
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:260
TLegendEntry()
TLegendEntry do-nothing default constructor.
virtual void SaveMarkerAttributes(std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t sizdef=1)
Save line attributes as C++ statement(s) on output stream out.
Definition: TAttMarker.cxx:229
TString fLabel
Text associated with the entry, will become latex.
Definition: TLegendEntry.h:56
A doubly linked list.
Definition: TList.h:47
virtual void Print(Option_t *option="") const
dump this TLegendEntry to std::cout
void Copy(TAttText &atttext) const
Copy this text attributes to a new TAttText.
Definition: TAttText.cxx:294
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:347
Text Attributes class.
Definition: TAttText.h:24
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:232
#define ClassImp(name)
Definition: Rtypes.h:279
virtual ~TLegendEntry()
TLegendEntry default destructor.
Mother of all ROOT objects.
Definition: TObject.h:37
virtual const char * GetTitle() const
Returns title of object.
Definition: TObject.cxx:460
TObject * fObject
pointer to object being represented by this entry
Definition: TLegendEntry.h:55
TString fOption
Options associated with this entry.
Definition: TLegendEntry.h:57
#define gPad
Definition: TVirtualPad.h:289
virtual void Copy(TObject &obj) const
copy this TLegendEntry into obj
virtual const char * GetName() const
Returns name of object.
Definition: TObject.cxx:416
Line Attributes class.
Definition: TAttLine.h:24
char name[80]
Definition: TGX11.cxx:109
void Copy(TAttFill &attfill) const
Copy this fill attributes to a new TAttFill.
Definition: TAttFill.cxx:200
const char * Data() const
Definition: TString.h:349