How to quit ROOT inside a TApplication

ROOT
1

Hi,

I have a C++ program where I have :

int main(int argc, char **argv)
{
 (...)

  TApplication theApp("theApp", &argc, argv) ;

(... my program)

  theApp.Run();

  return 0;
} // main

When I launch the program a few canvas are displayed and usually I just quit using File->Quit ROOT in one of the canvas, How could I do it automatically ?

Thanks a lot in advance that may save me a lot of time !!!

2

Hi,

This is what you need:

Up to you to decide when to call it (I don’t know what you mean by “automatically”…)

Cheers, Bertrand.

3

Thanks a lot, I meant by automatically just at thr end, so I guess just before return 0 ;

Still I’ve tried it and nothing happens, should I add something like an exit in top of it:

  theApp.Run();

  gApplication -> Terminate(0);
  exit(1) ;

  return 0;
} // main

Thanks in advance

4

Hi,

Sorry, but when you create a TApplication, you have to control it, there is no “automatic termination”…
(i.e. you may choose to terminate when there are no more open windows, no more input/output, no more open file, …)

Cheers,
Bertrand.

5

Ok then, but I think there should have such a thing, or am I just using the wrong class ?
Because when creating lots of batches of canvas using some code which has been quite improved I don’t see the point to stand in front of the screen just to quit at the ned of each batch.

What method would you sugggest ?

Thanks

6

Do you need something like TQtRootSlot class offers?
See: root.cern.ch/root/html/TQtRootSlot.html:

7

Valeri,
as far as I understood in his/her case all created canvases are
not closed, so “lastWindowClosed” will not work.

I think it’s possible to use (somehow)
root.cern.ch/root/html/TApplicat … tIdleTimer

Bertrand, could try this? Sorry, not by myself because of busy

Regards. Valeriy

8

Hi,

Please try the attached demo app. It creates three canvases, save them in gif format and then exit.

Cheers,
Bertrand.
test.cxx (1.79 KB)

9

[quote=“bellenot”]Hi,

Please try the attached demo app. It creates three canvases, save them in gif format and then exit.

Cheers,
Bertrand.[/quote]

Just a very silly comment :smiley:

It doesn’t matter too much what you call a source file, but make sure you don’t name the executable ‘test’. If you have ‘.’ in your path people usually just type

unix> test

And your code won’t run (you’ll run the unix command ‘test’ instead which appears to do nothing). Many people have lost many hours because of this. :smiley:

Cheers,
Charles

10

Hi Charles,

Sorry, I didn’t pay attention to this (I mostly develop on Windows) :blush:
And thank you very much for the tip, it is good to know! :wink:

Cheers,
Bertrand.

11

[quote=“Kaeguri”]Hi,

I have a C++ program where I have :

int main(int argc, char **argv)
{
 (...)

  TApplication theApp("theApp", &argc, argv) ;

(... my program)

  theApp.Run();

  return 0;
} // main

[/quote]Can you give us an example what your (... my program)does ? Probably you do not need to call theApp.Run(); at all. May be, what you need can be done with the simple ROOT session:root.exe -q <you program>With the information your have provided it is hard to make an advice.