ROOT
v6-32
Reference Guide
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hlGraph1.C
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1
/// \file
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/// \ingroup tutorial_graphs
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///
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/// This tutorial demonstrates how to use the highlight mode on graph.
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///
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/// \macro_code
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///
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/// \date March 2018
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/// \author Jan Musinsky
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TList
*
l
=
nullptr
;
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void
HighlightHisto(
TVirtualPad
*pad,
TObject
*obj,
Int_t
ihp,
Int_t
y
)
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{
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auto
Pad = (
TVirtualPad
*)pad->
FindObject
(
"Pad"
);
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if
(!Pad)
return
;
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if
(ihp == -1) {
// after highlight disabled
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Pad->
Clear
();
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return
;
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}
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if
(
l
&&
l
->At(ihp)) {
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Pad->cd();
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l
->At(ihp)->
Draw
();
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gPad
->Update();
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}
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}
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void
hlGraph1()
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{
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auto
Canvas =
new
TCanvas
(
"Canvas"
,
"Canvas"
, 0, 0, 700, 500);
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Canvas->HighlightConnect(
"HighlightHisto(TVirtualPad*,TObject*,Int_t,Int_t)"
);
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const
Int_t
n
= 500;
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Double_t
x
[
n
],
y
[
n
];
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l
=
new
TList
();
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for
(
Int_t
i = 0; i <
n
; i++) {
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auto
h
=
new
TH1F
(
TString::Format
(
"h_%03d"
, i),
""
, 100, -3.0, 3.0);
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h
->FillRandom(
"gaus"
, 1000);
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h
->Fit(
"gaus"
,
"Q"
);
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h
->SetMaximum(250.0);
// for n > 200
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l
->Add(
h
);
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x
[i] = i;
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y
[i] =
h
->GetFunction(
"gaus"
)->GetParameter(2);
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}
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auto
g
=
new
TGraph
(
n
,
x
,
y
);
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g
->SetMarkerStyle(6);
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g
->Draw(
"AP"
);
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auto
Pad =
new
TPad
(
"Pad"
,
"Pad"
, 0.3, 0.4, 1.0, 1.0);
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Pad->SetFillColor(
kBlue
-10);
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Pad->Draw();
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Pad->cd();
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auto
info =
new
TText
(0.5, 0.5,
"please move the mouse over the graPad"
);
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info->SetTextAlign(22);
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info->Draw();
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Canvas->cd();
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g
->SetHighlight();
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}
g
#define g(i)
Definition
RSha256.hxx:105
h
#define h(i)
Definition
RSha256.hxx:106
Int_t
int Int_t
Definition
RtypesCore.h:45
Double_t
double Double_t
Definition
RtypesCore.h:59
kBlue
@ kBlue
Definition
Rtypes.h:66
gPad
#define gPad
Definition
TVirtualPad.h:305
TCanvas
The Canvas class.
Definition
TCanvas.h:23
TGraph
A TGraph is an object made of two arrays X and Y with npoints each.
Definition
TGraph.h:41
TH1F
1-D histogram with a float per channel (see TH1 documentation)
Definition
TH1.h:621
TList
A doubly linked list.
Definition
TList.h:38
TObject
Mother of all ROOT objects.
Definition
TObject.h:41
TObject::Clear
virtual void Clear(Option_t *="")
Definition
TObject.h:119
TObject::FindObject
virtual TObject * FindObject(const char *name) const
Must be redefined in derived classes.
Definition
TObject.cxx:403
TObject::Draw
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition
TObject.cxx:274
TPad
The most important graphics class in the ROOT system.
Definition
TPad.h:28
TString::Format
static TString Format(const char *fmt,...)
Static method which formats a string using a printf style format descriptor and return a TString.
Definition
TString.cxx:2378
TText
Base class for several text objects.
Definition
TText.h:22
TVirtualPad
TVirtualPad is an abstract base class for the Pad and Canvas classes.
Definition
TVirtualPad.h:51
y
Double_t y[n]
Definition
legend1.C:17
x
Double_t x[n]
Definition
legend1.C:17
n
const Int_t n
Definition
legend1.C:16
l
TLine l
Definition
textangle.C:4
tutorials
graphs
hlGraph1.C
ROOT v6-32 - Reference Guide Generated on Fri Nov 1 2024 15:09:40 (GVA Time) using Doxygen 1.9.8