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Reference Guide
gviz3d.C File Reference

Detailed Description

Simple TStructViewer tutorial.

#include <TRandom.h>
#include <TList.h>
#include <TROOT.h>
// Function creating elements of lists
void MakeCrazy(TList *list, Int_t maxDepth, Int_t maxObjects, Float_t pList) {
const Int_t ncl =12;
const char *clnames[ncl] = {"TH1F","TGraph","TGraphErrors","TF1","TPaveText",
Int_t nobj = gRandom->Uniform(0,maxObjects);
for (Int_t i=0;i<nobj;i++) {
if (maxDepth && gRandom->Rndm() < pList) {
TList *slist = new TList();
} else {
Int_t icl = (Int_t)gRandom->Uniform(0,ncl);
TNamed *named = (TNamed*)gROOT->ProcessLine(Form("new %s;",clnames[icl]));
// function creating a hierachy of objects to test the TStructViewer
TList *crazy(Int_t maxDepth=5, Int_t maxObjects=20, Float_t pList=0.2) {
TList *list = new TList();
return list;
// function adding colors to viewer
void FillColorsMap(TStructViewer* sv)
// Fills list fColors with TStructNodeProperty
const Int_t ncl =12;
const char *clnames[ncl] = {"TH1F","TGraph","TGraphErrors","TF1","TPaveText",
for (int i = 0; i < ncl ; i++) {
sv->SetColor(clnames[i], (Int_t)gRandom->Integer(8)+2);
void gviz3d()
// Creating a pointer to list
TList* pointer = crazy(2,10);
// Creating a viewer
TStructViewer* sv = new TStructViewer(pointer);
// adding colors
int Int_t
Definition: RtypesCore.h:45
float Float_t
Definition: RtypesCore.h:57
#define gROOT
Definition: TROOT.h:404
R__EXTERN TRandom * gRandom
Definition: TRandom.h:62
char * Form(const char *fmt,...)
Formats a string in a circular formatting buffer.
Definition: TString.cxx:2452
void SetName(const char *name)
Definition: TCollection.h:206
A doubly linked list.
Definition: TList.h:38
void Add(TObject *obj) override
Definition: TList.h:81
The TNamed class is the base class for all named ROOT classes.
Definition: TNamed.h:29
virtual void SetName(const char *name)
Set the name of the TNamed.
Definition: TNamed.cxx:140
Double_t Rndm() override
Machine independent random number generator.
Definition: TRandom.cxx:552
virtual Double_t Uniform(Double_t x1=1)
Returns a uniform deviate on the interval (0, x1).
Definition: TRandom.cxx:672
virtual UInt_t Integer(UInt_t imax)
Returns a random integer uniformly distributed on the interval [ 0, imax-1 ].
Definition: TRandom.cxx:360
void Draw(Option_t *option="")
Draw object if there is valid pointer.
void SetColor(TString name, Int_t color)
Sets color for the class "name" to color "color".
Timur Pocheptsov

Definition in file gviz3d.C.