graph_edit_playback.C File Reference

Detailed Description

This macro plays a recorded ROOT session showing how to perform various interactive graphical editing operations.

The initial graphics setup was created using the following root commands:

TRecorder *t = new TRecorder();
t->Start("graphedit_playback.root");
gStyle->SetPalette(1);
TCanvas *c2 = new TCanvas("c2","c2",0,0,700,500);
TH2F* h2 = new TH2F("h2","Random 2D Gaussian",40,-4,4,40,-4,4);
h2->SetDirectory(0);
TRandom r;
for (int i=0;i<50000;i++) h2->Fill(r.Gaus(),r.Gaus());
h2->Draw();
gPad->Update();
TCanvas *c1 = new TCanvas("c1","c1",0,0,700,500);
TH1F* h1 = new TH1F("h1","Random 1D Gaussian",100,-4,4);
h1->SetDirectory(0);
h1->FillRandom("gaus",10000);
h1->Draw();
gPad->Update();
 
// Here the following "sketch" was done.
 
t->Stop();

Note: The previous commands should be copy/pasted into a ROOT session, not executed as a macro.

The interactive editing shows

• Object editing using object editors
• Direct editing on the graphics canvas
• Saving PS and bitmap files.
• Saving as a .C file: C++ code corresponding to the modifications is saved.

The sketch of the recorded actions is

On the canvas c1

• Open View/Editor
• Select histogram
• Change fill style
• Change fill color
• Move stat box
• Change fill color
• Move title
• Change fill color using wheel color
• Select Y axis
• Change axis title
• Select X axis
• Change axis title
• Select histogram
• Go in binning
• Change range
• Move range
• On the canvas menu set grid Y
• On the canvas menu set grid X
• On the canvas menu set log Y
• Increase the range
• Close View/Editor
• Open the Tool Bar
• Create a text "Comment"
• Create an arrow
• Change the arrow size
• Close the Tool Bar
• Save as PS file
• Save as C file
• Close c1

  On the canvas c2

• Open View/Editor
• Select histogram
• Select COL
• Select Palette
• Move Stats
• Select Overflows
• Select histogram
• Select 3D
• Select SURF1
• Rotate Surface
• Go in binning
• Change X range
• Change Y range
• Close View/Editor
• Save as GIF file
• Save as C file
• Close c2

  Author

  Olivier Couet

Definition in file graph_edit_playback.C.