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eval.C
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1/// \file
2/// \ingroup tutorial_graphics
3/// \notebook -js
4/// This macro produces the flowchart of TFormula::Eval.
5///
6/// \macro_image
7/// \macro_code
8///
9/// \author Rene Brun
10
11void eval(){
12
13 TCanvas *c1 = new TCanvas("c1");
14 c1->Range(0,0,20,10);
15 TPaveLabel *pt1 = new TPaveLabel(0.2,4,3,6,"Eval");
16 pt1->SetTextSize(0.5);
17 pt1->SetFillColor(42);
18 pt1->Draw();
19 TPaveText *pt2 = new TPaveText(4.5,4,7.8,6);
20 pt2->Draw();
21 TText *t1 = pt2->AddText("Read Operator");
22 TText *t2 = pt2->AddText("number i");
23 TPaveText *pt3 = new TPaveText(9,3.5,17.5,6.5);
24 TText *t4 = pt3->AddText("Apply Operator to current stack values");
25 TText *t5 = pt3->AddText("Example: if operator +");
26 TText *t6 = pt3->AddText("value[i] += value[i-1]");
27 t4->SetTextAlign(22);
28 t5->SetTextAlign(22);
29 t6->SetTextAlign(22);
30 t5->SetTextColor(4);
31 t6->SetTextColor(2);
32 pt3->Draw();
33 TPaveLabel *pt4 = new TPaveLabel(4,0.5,12,2.5,"return result = value[i]");
34 pt4->Draw();
35 TArrow *ar1 = new TArrow(6,4,6,2.7,0.02,"|>");
36 ar1->Draw();
37 TText *t7 = new TText(6.56,2.7,"if i = number of stack elements");
38 t7->SetTextSize(0.04);
39 t7->Draw();
40 ar1->DrawArrow(6,8,6,6.2,0.02,"|>");
41 TLine *l1 = new TLine(12,6.6,12,8);
42 l1->Draw();
43 l1->DrawLine(12,8,6,8);
44 ar1->DrawArrow(3,5,4.4,5,0.02,"|>");
45 ar1->DrawArrow(7.8,5,8.9,5,0.02,"|>");
46}
47
Draw all kinds of Arrows.
Definition: TArrow.h:29
virtual void DrawArrow(Double_t x1, Double_t y1, Double_t x2, Double_t y2, Float_t arrowsize=0, Option_t *option="")
Draw this arrow with new coordinates.
Definition: TArrow.cxx:135
virtual void Draw(Option_t *option="")
Draw this arrow with its current attributes.
Definition: TArrow.cxx:120
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition: TAttText.h:41
virtual void SetTextColor(Color_t tcolor=1)
Set the text color.
Definition: TAttText.h:43
virtual void SetTextSize(Float_t tsize=1)
Set the text size.
Definition: TAttText.h:46
The Canvas class.
Definition: TCanvas.h:23
Use the TLine constructor to create a simple line.
Definition: TLine.h:22
virtual TLine * DrawLine(Double_t x1, Double_t y1, Double_t x2, Double_t y2)
Draw this line with new coordinates.
Definition: TLine.cxx:102
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:197
A Pave (see TPave) with a text centered in the Pave.
Definition: TPaveLabel.h:20
virtual void Draw(Option_t *option="")
Draw this pavelabel with its current attributes.
Definition: TPaveLabel.cxx:77
A Pave (see TPave) with text, lines or/and boxes inside.
Definition: TPaveText.h:21
virtual TText * AddText(Double_t x1, Double_t y1, const char *label)
Add a new Text line to this pavetext at given coordinates.
Definition: TPaveText.cxx:183
virtual void Draw(Option_t *option="")
Draw this pavetext with its current attributes.
Definition: TPaveText.cxx:234
Base class for several text objects.
Definition: TText.h:22
return c1
Definition: legend1.C:41
auto * t1
Definition: textangle.C:20