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Revision Log
W A R N I N G !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
==================================================================
A very long list of changes in this pre-release of version 3.00.
We have modified the signature of many functions (in particular TObject)
to introduce more constness in the system.
You must change your code if your class derives from TObject and uses
one of the modified functions such as ls, Print, Compare, Hash, etc.
The modified functions in TObject have the following signature:
virtual TObject *Clone() const;
virtual Int_t Compare(const TObject *obj) const;
virtual void Delete(Option_t *option=""); // *MENU*
virtual void DrawClass() const; // *MENU*
virtual void DrawClone(Option_t *option="") const; // *MENU*
virtual void Dump() const; // *MENU*
virtual TObject *FindObject(const TObject *obj) const;
virtual char *GetObjectInfo(Int_t px, Int_t py) const;
virtual ULong_t Hash() const;
virtual void Inspect() const; // *MENU*
virtual Bool_t IsEqual(const TObject *obj) const;
virtual void ls(Option_t *option="") const;
virtual void Print(Option_t *option="") const;
A similar operation has been done with classes such as TH1, TVirtualPad,
TTree, etc.
// @(#)root/graf:$Name: $:$Id: TMultiGraph.cxx,v 1.1 2000/10/12 13:27:23 brun Exp $
// Author: Rene Brun 12/10/2000
/*************************************************************************
* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#include "TROOT.h"
#include "TMultiGraph.h"
#include "TGraph.h"
#include "TH1.h"
#include "TVirtualPad.h"
#include <ctype.h>
#include <fstream.h>
ClassImp(TMultiGraph)
//______________________________________________________________________________
//
// A TMultiGraph is a collection of TGraph (or derived) objects
// Use TMultiGraph::Add to add a new graph to the list.
// The TMultiGraph owns the objects in the list.
// Drawing options are the same as for TGraph
// Example;
// TGraph *gr1 = new TGraph(...
// TGraphErrors *gr2 = new TGraphErrors(...
// TMultiGraph *mg = new TMultiGraph();
// mg->Add(gr1);
// mg->Add(gr2);
// mg->Draw("alp");
//______________________________________________________________________________
TMultiGraph::TMultiGraph(): TNamed()
{
// TMultiGraph default constructor
fGraphs = 0;
fHistogram = 0;
fMaximum = -1111;
fMinimum = -1111;
}
//______________________________________________________________________________
TMultiGraph::TMultiGraph(const char *name, const char *title)
: TNamed(name,title)
{
// constructor with name and title
fGraphs = 0;
fHistogram = 0;
fMaximum = -1111;
fMinimum = -1111;
}
//______________________________________________________________________________
TMultiGraph::~TMultiGraph()
{
// TMultiGraph destructor
if (!fGraphs) return;
fGraphs->Delete();
delete fGraphs;
fGraphs = 0;
delete fHistogram;
fHistogram = 0;
}
//______________________________________________________________________________
void TMultiGraph::Add(TGraph *graph)
{
// add a new graph to the list of graphs
if (!fGraphs) fGraphs = new TList();
fGraphs->Add(graph);
}
//______________________________________________________________________________
void TMultiGraph::Browse(TBrowser *)
{
Draw("alp");
gPad->Update();
}
//______________________________________________________________________________
Int_t TMultiGraph::DistancetoPrimitive(Int_t px, Int_t py)
{
// Compute distance from point px,py to each graph
//
//*-*- Are we on the axis?
const Int_t kMaxDiff = 10;
Int_t distance = 9999;
if (fHistogram) {
distance = fHistogram->DistancetoPrimitive(px,py);
if (distance <= 0) return distance;
}
//*-*- Loop on the list of graphs
if (!fGraphs) return distance;
TGraph *g;
TIter next(fGraphs);
while ((g = (TGraph*) next())) {
Int_t dist = g->DistancetoPrimitive(px,py);
if (dist < kMaxDiff) {gPad->SetSelected(g); return dist;}
}
return distance;
}
//______________________________________________________________________________
void TMultiGraph::Draw(Option_t *option)
{
//*-*-*-*-*-*-*-*-*-*-*Draw this multigraph with its current attributes*-*-*-*-*-*-*
//*-* ==========================================
//
// Options to draw a graph are described in TGraph::PainGraph
AppendPad(option);
}
//______________________________________________________________________________
TH1F *TMultiGraph::GetHistogram() const
{
// Returns a pointer to the histogram used to draw the axis
// Takes into account the two following cases.
// 1- option 'A' was specified in TMultiGraph::Draw. Return fHistogram
// 2- user had called TPad::DrawFrame. return pointer to hframe histogram
if (fHistogram) return fHistogram;
if (!gPad) return 0;
gPad->Modified();
gPad->Update();
if (fHistogram) return fHistogram;
TH1F *h1 = (TH1F*)gPad->FindObject("hframe");
return h1;
}
//______________________________________________________________________________
TAxis *TMultiGraph::GetXaxis() const
{
// Get x axis of the graph.
if (!gPad) return 0;
return GetHistogram()->GetXaxis();
}
//______________________________________________________________________________
TAxis *TMultiGraph::GetYaxis() const
{
// Get y axis of the graph.
if (!gPad) return 0;
return GetHistogram()->GetYaxis();
}
//______________________________________________________________________________
void TMultiGraph::Paint(Option_t *option)
{
// paint all the graphs of this multigraph
char *l;
static char chopt[33];
Int_t nch = strlen(option);
for (Int_t i=0;i<nch;i++) chopt[i] = toupper(option[i]);
chopt[nch] = 0;
l = strstr(chopt,"A");
if (l) {
*l = ' ';
TGraph *g;
TIter next(fGraphs);
Int_t npt = 100;
Double_t maximum, minimum, rwxmin, rwxmax, rwymin, rwymax, uxmin, uxmax, dx, dy;
if (fHistogram) {
rwxmin = gPad->GetUxmin();
rwxmax = gPad->GetUxmax();
rwymin = gPad->GetUymin();
rwymax = gPad->GetUymax();
minimum = fHistogram->GetMinimumStored();
maximum = fHistogram->GetMaximumStored();
if (minimum == -1111) minimum = fHistogram->GetYaxis()->GetXmin();
if (maximum == -1111) maximum = fHistogram->GetYaxis()->GetXmax();
uxmin = gPad->PadtoX(rwxmin);
uxmax = gPad->PadtoX(rwxmax);
} else {
rwxmin = 1e100;
rwxmax = -rwxmin;
rwymin = rwxmin;
rwymax = -rwymin;
while ((g = (TGraph*) next())) {
g->ComputeRange(rwxmin, rwymin, rwxmax, rwymax);
if (g->GetN() > npt) npt = g->GetN();
}
if (rwxmin == rwxmax) rwxmax += 1.;
if (rwymin == rwymax) rwymax += 1.;
dx = 0.1*(rwxmax-rwxmin);
dy = 0.1*(rwymax-rwymin);
uxmin = rwxmin - dx;
uxmax = rwxmax + dx;
minimum = rwymin - dy;
maximum = rwymax + dy;
}
if (fMinimum != -1111) rwymin = minimum = fMinimum;
if (fMaximum != -1111) rwymax = maximum = fMaximum;
if (uxmin < 0 && rwxmin >= 0) {
if (gPad->GetLogx()) uxmin = 0.9*rwxmin;
else uxmin = 0;
}
if (uxmax > 0 && rwxmax <= 0) {
if (gPad->GetLogx()) uxmax = 1.1*rwxmax;
else uxmax = 0;
}
if (minimum < 0 && rwymin >= 0) {
if(gPad->GetLogy()) minimum = 0.9*rwymin;
else minimum = 0;
}
if (maximum > 0 && rwymax <= 0) {
if(gPad->GetLogy()) maximum = 1.1*rwymax;
else maximum = 0;
}
if (minimum <= 0 && gPad->GetLogy()) minimum = 0.001*maximum;
if (uxmin <= 0 && gPad->GetLogx()) {
if (uxmax > 1000) uxmin = 1;
else uxmin = 0.001*uxmax;
}
rwymin = minimum;
rwymax = maximum;
if (fHistogram) {
fHistogram->SetMinimum(rwymin);
fHistogram->SetMaximum(rwymax);
}
//*-*- Create a temporary histogram to draw the axis
if (!fHistogram) {
// the graph is created with at least as many channels as there are points
// to permit zooming on the full range
rwxmin = uxmin;
rwxmax = uxmax;
fHistogram = new TH1F(GetName(),GetTitle(),npt,rwxmin,rwxmax);
if (!fHistogram) return;
fHistogram->SetMinimum(rwymin);
fHistogram->SetBit(TH1::kNoStats);
fHistogram->SetMaximum(rwymax);
fHistogram->GetYaxis()->SetLimits(rwymin,rwymax);
fHistogram->SetDirectory(0);
}
fHistogram->Paint();
}
TGraph *g;
if (fGraphs) {
TIter next(fGraphs);
while ((g = (TGraph*) next())) {
g->Paint(chopt);
}
}
}
//______________________________________________________________________________
void TMultiGraph::Print(Option_t *option) const
{
// Print the list of graphs
TGraph *g;
if (fGraphs) {
TIter next(fGraphs);
while ((g = (TGraph*) next())) {
g->Print(option);
}
}
}
//______________________________________________________________________________
void TMultiGraph::SavePrimitive(ofstream &out, Option_t *option)
{
// Save primitive as a C++ statement(s) on output stream out
char quote = '"';
out<<" "<<endl;
if (gROOT->ClassSaved(TMultiGraph::Class())) {
out<<" ";
} else {
out<<" TMultiGraph *";
}
out<<"multigraph = new TMultiGraph();"<<endl;
out<<" multigraph->SetName("<<quote<<GetName()<<quote<<");"<<endl;
out<<" multigraph->SetTitle("<<quote<<GetTitle()<<quote<<");"<<endl;
TGraph *g;
if (fGraphs) {
TIter next(fGraphs);
while ((g = (TGraph*) next())) {
g->SavePrimitive(out,"multigraph");
}
}
out<<" multigraph->Draw("
<<quote<<option<<quote<<");"<<endl;
}
//______________________________________________________________________________
void TMultiGraph::SetMaximum(Double_t maximum)
{
fMaximum = maximum;
if (fHistogram) fHistogram->SetMaximum(maximum);
}
//______________________________________________________________________________
void TMultiGraph::SetMinimum(Double_t minimum)
{
fMinimum = minimum;
if (fHistogram) fHistogram->SetMinimum(minimum);
}
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