Re: Canvas is not shown.

Jayoung Wu (jayoung@glue.umd.edu)
Wed, 4 Mar 1998 13:36:11 -0500 (EST)

On Wed, 4 Mar 1998, Fons Rademakers wrote:
>
> Now to make your program in point 3) work as expected, add the lines:
>
> int main()
> {
> TROOT ytrack("plot2","plot test");
>
> // Create application environment, needed for interactive apps.
> // Alternatively can create a TRint object, I which case you
> // get also command line input capability.
> TApplication theApp("App", 0, 0);
>
> TCanvas *c1 = new TCanvas("c1","Tracking of Incident Particle",
> 200,10,700,500);
> c1->Update();
>
> theApp.Run(); // will not return
>
> return 0;
> }
>
>
> For more detail see $ROOTSYS/test/hworld.cxx.
>
> Cheers, Fons.
>

For point 3) I tried according to your suggestion but I got the error
message:
*** Break *** segmentation violation
IOT trap

======================= My code was
#include <stdio.h>
#include <math.h>

#include "TROOT.h"
#include "TFile.h"
#include "TTree.h"
#include "TBranch.h"
#include "TObject.h"
#include "TH1.h"
#include "TCanvas.h"
#include "TApplication.h"

Int_t main()
{
TROOT ytrack("plot2","plot test");
TApplication theApp("App", 0, 0);

TCanvas *c1 = new TCanvas("c1","Tracking of Incident Particle",
200,10,700,500);

// c1->Modified();
c1->Update();

theApp.Run();
return 0;

}

---
Thanks a lot!
Jayoung