TApplication in batch mode

ROOT
1

Hello all,

please excuse me if this information is available somewhere, but I seem to incapable of finding it. I am usually running programs “outside” ROOT in Linux like:

test.cc:

#include <iostream>

#include "TApplication.h"
#include "TCanvas.h"

int main(int argc, char**argv)
{
  TApplication *app = new TApplication("app",&argc,argv);

  // Just to do something...
  TCanvas *c1 = new TCanvas("c1","c1",950,950);

  app->Run();

  return 0;
}

And I can compile it, run it, I have the window opened and everything’s fine. The problem now, comes from when I want to run it in batch mode using the option ‘-b’ like
./test -b

So no window is opened and things goes well, but it still hangs in the Run() part, and I have to leave it with ^C.

Is that expected? Is there any option that would disable the hanging in Run()? Shouldn’t the bash option also disable that?

Thank you,
Tudi.

2

Whe using TApplication, we assume that you control yourself the event loop.
In your case use TRint (it is a TApplication) as shown below and run

myapp -b -q
Rene

[code]
#include

#include “TRint.h”
#include “TCanvas.h”

int main(int argc, char**argv)
{
TRint *app = new TRint(“app”,&argc,argv);

// Just to do something…
TCanvas *c1 = new TCanvas(“c1”,“c1”,950,950);

app->Run();

return 0;
} [/code]

3

Alright, thanks for your answer.

4

Dear Rene and Tudi,

I have exactly the same issue. The difference is that my program receives already some arguments. When I introduce -b and -q in the argument line, argc and arg are modifed. I can skip this somehow by copying the arguments somewhere else before instantiating TRint, but could it be done in an elegant way?

Thanks,
Javier