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Reference Guide
TSlider.cxx
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1 // @(#)root/gpad:$Id$
2 // Author: Rene Brun 23/11/96
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 "Riostream.h"
13 #include "TROOT.h"
14 #include "TSlider.h"
15 #include "TSliderBox.h"
16 
17 #include <string.h>
18 
20 
21 /** \class TSlider
22 \ingroup gpad
23 
24 A specialized TPad including a TSliderBox object.
25 The TSliderBox can be moved in the pad.
26 
27 Slider drawing options include the possibility to change the slider
28 starting and ending positions or only one of them.
29 
30 The current slider position can be retrieved via the functions
31 TSlider::GetMinimum and TSlider::GetMaximum
32  These two functions return numbers in the range [0,1].
33 
34 If a method has been set (via TSlider::SetMethod), the expression is
35 executed via the interpreter when the button 1 is released.
36 
37  if no method has been set, and an object is referenced (TSlider::SetObject
38  has been called), while the slider is being moved/resized,
39  the object ExecuteEvent function is called.
40 
41 ### Example 1 using TSlider::SetMethod
42 
43 #### macro xyslider.C
44 
45 ~~~ {.cpp}
46 void xyslider()
47 {
48  // Example of macro featuring two sliders
49  TFile *f = new TFile("hsimple.root");
50  TH2F *hpxpy = (TH2F*)f->Get("hpxpy");
51  TCanvas *c1 = new TCanvas("c1");
52  TPad *pad = new TPad("pad","Color plot pad",0.1,0.1,0.98,0.98);
53  pad->Draw();
54  pad->cd();
55  hpxpy->Draw("COLZ");
56  c1->cd();
57 
58  // Create two sliders in main canvas. When button1 will be released
59  // the macro action.C will be called.
60  TSlider *xslider = new TSlider("xslider","x",0.1,0.02,0.98,0.08);
61  xslider->SetMethod(".x action.C");
62  TSlider *yslider = new TSlider("yslider","y",0.02,0.1,0.06,0.98);
63  yslider->SetMethod(".x action.C");
64 }
65 ~~~
66 
67 #### macro action.C
68 ~~~ {.cpp}
69 void action()
70 {
71  Int_t nx = hpxpy->GetXaxis()->GetNbins();
72  Int_t ny = hpxpy->GetYaxis()->GetNbins();
73  Int_t binxmin = nx*xslider->GetMinimum();
74  Int_t binxmax = nx*xslider->GetMaximum();
75  hpxpy->GetXaxis()->SetRange(binxmin,binxmax);
76  Int_t binymin = ny*yslider->GetMinimum();
77  Int_t binymax = ny*yslider->GetMaximum();
78  hpxpy->GetYaxis()->SetRange(binymin,binymax);
79  pad->cd();
80  hpxpy->Draw("COLZ");
81  c1->Update();
82 }
83 ~~~
84 
85 The canvas and the sliders created in the above macro are shown in the picture
86 below.
87 
88 \image html gpad_slider.png
89 
90 ### Example 2 using TSlider::SetObject macro xyslider.C
91 
92  Same example as above. Instead of TSlider::SetMethod:
93 ~~~ {.cpp}
94  Myclass *obj = new Myclass(); // Myclass derived from TObject
95  xslider->SetObject(obj);
96  yslider->SetObject(obj);
97 ~~~
98 
99 When the slider will be changed, MyClass::ExecuteEvent will be called with px=0
100 and py = 0
101 */
102 
103 ////////////////////////////////////////////////////////////////////////////////
104 /// slider default constructor.
105 
107 {
108  fObject = 0;
109  fMethod = "";
110  fMinimum = 0;
111  fMaximum = 1;
112 }
113 
114 ////////////////////////////////////////////////////////////////////////////////
115 /// Slider normal constructor.
116 ///
117 /// x1,y1,x2,y2 are in pad user coordinates
118 
119 TSlider::TSlider(const char *name, const char *title, Double_t x1, Double_t y1,Double_t x2, Double_t y2, Color_t color, Short_t bordersize, Short_t bordermode)
120  :TPad(name,title,0.1,0.1,0.9,0.9,color,bordersize,bordermode)
121 {
122  Double_t x1pad = gPad->GetX1();
123  Double_t x2pad = gPad->GetX2();
124  Double_t y1pad = gPad->GetY1();
125  Double_t y2pad = gPad->GetY2();
126  Double_t xmin = (x1-x1pad)/(x2pad-x1pad);
127  Double_t ymin = (y1-y1pad)/(y2pad-y1pad);
128  Double_t xmax = (x2-x1pad)/(x2pad-x1pad);
129  Double_t ymax = (y2-y1pad)/(y2pad-y1pad);
130  SetPad(xmin,ymin,xmax,ymax);
131  Range(0,0,1,1);
132 
134  Modified(kTRUE);
135 
136  fMinimum = 0;
137  fMaximum = 1;
138  fObject = 0;
139  fMethod = "";
140  Double_t dx = PixeltoX(bordersize);
141  Double_t dy = PixeltoY(-bordersize);
142  TSliderBox *sbox = new TSliderBox(dx,dy,1-dx,1-dy,color,bordersize,-bordermode);
143  sbox->SetSlider(this);
144  fPrimitives->Add(sbox);
145  AppendPad();
146 }
147 
148 ////////////////////////////////////////////////////////////////////////////////
149 /// slider default destructor.
150 
152 {
153 }
154 
155 ////////////////////////////////////////////////////////////////////////////////
156 /// Paint this slider with its current attributes.
157 
159 {
160  TPad::Paint(option);
161 }
162 
163 ////////////////////////////////////////////////////////////////////////////////
164 /// Save primitive as a C++ statement(s) on output stream out
165 
166 void TSlider::SavePrimitive(std::ostream &out, Option_t * /*= ""*/)
167 {
168  TPad *padsav = (TPad*)gPad;
169  char quote = '"';
170  if (gROOT->ClassSaved(TSlider::Class())) {
171  out<<" ";
172  } else {
173  out<<" TSlider *";
174  }
175  out<<"slider = new TSlider("<<quote<<GetName()<<quote<<", "<<quote<<GetTitle()
176  <<quote
177  <<","<<fXlowNDC
178  <<","<<fYlowNDC
179  <<","<<fXlowNDC+fWNDC
180  <<","<<fYlowNDC+fHNDC
181  <<");"<<std::endl;
182 
183  SaveFillAttributes(out,"slider",0,1001);
184  SaveLineAttributes(out,"slider",1,1,1);
185 
186  if (GetBorderSize() != 2) {
187  out<<" slider->SetBorderSize("<<GetBorderSize()<<");"<<std::endl;
188  }
189  if (GetBorderMode() != -1) {
190  out<<" slider->SetBorderMode("<<GetBorderMode()<<");"<<std::endl;
191  }
192  Int_t lenMethod = strlen(GetMethod());
193  if (lenMethod > 0) {
194  out<<" slider->SetMethod("<<quote<<GetMethod()<<quote<<");"<<std::endl;
195  }
196 
197  out<<" "<<padsav->GetName()<<"->cd();"<<std::endl;
198  padsav->cd();
199 }
200 
201 ////////////////////////////////////////////////////////////////////////////////
202 /// Set Slider range in [0,1]
203 
205 {
206  TSliderBox *sbox = (TSliderBox*)fPrimitives->FindObject("TSliderBox");
207  if (sbox) {
208  if (fAbsWNDC > fAbsHNDC) {
209  sbox->SetX1(xmin);
210  sbox->SetX2(xmax);
211  } else {
212  sbox->SetY1(xmin);
213  sbox->SetY2(xmax);
214  }
215  }
216  fMinimum = xmin;
217  fMaximum = xmax;
218  Modified();
219 }
virtual void Paint(Option_t *option="")
Paint this slider with its current attributes.
Definition: TSlider.cxx:158
virtual void SetPad(const char *name, const char *title, Double_t xlow, Double_t ylow, Double_t xup, Double_t yup, Color_t color=35, Short_t bordersize=5, Short_t bordermode=-1)
Set all pad parameters.
Definition: TPad.cxx:5867
float xmin
Definition: THbookFile.cxx:93
TList * fPrimitives
->List of primitives (subpads)
Definition: TPad.h:106
virtual Short_t GetBorderSize() const
Definition: TPad.h:197
TString fMethod
command to be executed when slider is changed
Definition: TSlider.h:24
virtual void Paint(Option_t *option="")
Paint all primitives in pad.
Definition: TPad.cxx:3389
const char Option_t
Definition: RtypesCore.h:62
float ymin
Definition: THbookFile.cxx:93
virtual const char * GetMethod() const
Definition: TSlider.h:37
Double_t fMaximum
Slider maximum value in [0,1].
Definition: TSlider.h:22
Double_t PixeltoX(Int_t px)
Definition: TPad.h:430
virtual void SetRange(Double_t xmin=0, Double_t xmax=1)
Set Slider range in [0,1].
Definition: TSlider.cxx:204
#define gROOT
Definition: TROOT.h:410
int Int_t
Definition: RtypesCore.h:41
virtual void SetX1(Double_t x1)
Definition: TBox.h:63
virtual void SetX2(Double_t x2)
Definition: TBox.h:64
Double_t fAbsWNDC
Absolute Width of pad along X in NDC.
Definition: TPad.h:70
The moving box in a TSlider.
Definition: TSliderBox.h:20
void SetBit(UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.
Definition: TObject.cxx:694
virtual TObject * FindObject(const char *name) const
Delete a TObjLink object.
Definition: TList.cxx:574
if object in a list can be deleted
Definition: TObject.h:58
A specialized TPad including a TSliderBox object.
Definition: TSlider.h:18
virtual void AppendPad(Option_t *option="")
Append graphics object to current pad.
Definition: TObject.cxx:105
TVirtualPad * cd(Int_t subpadnumber=0)
Set Current pad.
Definition: TPad.cxx:594
static const double x2[5]
Double_t fMinimum
Slider minimum value in [0,1].
Definition: TSlider.h:21
void Class()
Definition: Class.C:29
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:262
virtual ~TSlider()
slider default destructor.
Definition: TSlider.cxx:151
const char * GetTitle() const
Returns title of object.
Definition: TPad.h:256
Double_t fAbsHNDC
Absolute Height of pad along Y in NDC.
Definition: TPad.h:71
Double_t fYlowNDC
Y bottom left corner of pad in NDC [0,1].
Definition: TPad.h:62
short Color_t
Definition: RtypesCore.h:79
void SetSlider(TSlider *slider)
Definition: TSliderBox.h:38
float ymax
Definition: THbookFile.cxx:93
TSlider()
slider default constructor.
Definition: TSlider.cxx:106
virtual void Range(Double_t x1, Double_t y1, Double_t x2, Double_t y2)
Set world coordinate system for the pad.
Definition: TPad.cxx:5121
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:233
The most important graphics class in the ROOT system.
Definition: TPad.h:29
short Short_t
Definition: RtypesCore.h:35
float xmax
Definition: THbookFile.cxx:93
virtual void SetY2(Double_t y2)
Definition: TBox.h:66
virtual void SavePrimitive(std::ostream &out, Option_t *option="")
Save primitive as a C++ statement(s) on output stream out.
Definition: TSlider.cxx:166
static const double x1[5]
TObject * fObject
!Pointer to associated object
Definition: TSlider.h:23
#define ClassImp(name)
Definition: Rtypes.h:359
double Double_t
Definition: RtypesCore.h:55
Double_t PixeltoY(Int_t py)
Definition: TPad.h:438
Double_t fXlowNDC
X bottom left corner of pad in NDC [0,1].
Definition: TPad.h:61
const char * GetName() const
Returns name of object.
Definition: TPad.h:255
virtual void Add(TObject *obj)
Definition: TList.h:87
virtual Short_t GetBorderMode() const
Definition: TPad.h:196
Double_t fHNDC
Height of pad along Y in NDC.
Definition: TPad.h:66
#define gPad
Definition: TVirtualPad.h:285
virtual void SetY1(Double_t y1)
Definition: TBox.h:65
const Bool_t kTRUE
Definition: RtypesCore.h:87
void Modified(Bool_t flag=1)
Definition: TPad.h:414
char name[80]
Definition: TGX11.cxx:109
Double_t fWNDC
Width of pad along X in NDC.
Definition: TPad.h:65