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:
t->
Start(
"graphedit_playback.root");
TH2F* h2 =
new TH2F(
"h2",
"Random 2D Gaussian",40,-4,4,40,-4,4);
h2->SetDirectory(0);
for (
int i=0;i<50000;i++) h2->Fill(
r.Gaus(),
r.Gaus());
h2->Draw();
TH1F*
h1 =
new TH1F(
"h1",
"Random 1D Gaussian",100,-4,4);
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
R__EXTERN TStyle * gStyle
1-D histogram with a float per channel (see TH1 documentation)
virtual void SetDirectory(TDirectory *dir)
By default, when a histogram is created, it is added to the list of histogram objects in the current ...
virtual void FillRandom(const char *fname, Int_t ntimes=5000, TRandom *rng=nullptr)
Fill histogram following distribution in function fname.
void Draw(Option_t *option="") override
Draw this histogram with options.
2-D histogram with a float per channel (see TH1 documentation)
This is the base class for the ROOT Random number generators.
Class provides direct recorder/replayer interface for a user.
void Stop(Bool_t guiCommand=kFALSE)
Stopps recording events.
void Start(const char *filename, Option_t *option="RECREATE", Window_t *w=nullptr, Int_t winCount=0)
Starts recording events.
void SetPalette(Int_t ncolors=kBird, Int_t *colors=nullptr, Float_t alpha=1.)
See TColor::SetPalette.
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.