Comments on: How to control console application in Qt.

By: Marek Belisko

Marek Belisko — Mon, 02 Jan 2012 08:01:09 +0000

You can use: http://developer.qt.nokia.com/doc/qt-4.8/qprocess.html#waitForFinished
For autoscroll just read manual for textEdit : http://developer.qt.nokia.com/doc/qt-4.8/qtextedit.html (or use qtcreator to set property)

By: markc

markc — Mon, 02 Jan 2012 06:17:20 +0000

Great, thanks, now I see what I was missing. I know this goes beyond your example but if you care to offer a suggestion then it will be appreciated. If I try this it mostly works…
m_process->start(“tail -f /var/log/syslog”);

When quitting I get this…

QProcess: Destroyed while process is still running.

. is there a “proper way” to stop the background process when exiting the main program?
. and is there a simple setting to get the window to auto scroll as new lines are added?

If both the above are really simple and if an argv[1] could be used then this fine example actually becomes useful.

By: Marek Belisko

Marek Belisko — Sun, 01 Jan 2012 13:05:24 +0000

You can get whole qt project from here (I update post with complete example). Form with ui was missing. Sorry.

By: markc

markc — Sun, 01 Jan 2012 08:22:07 +0000

I’m not sure what to do about this in updateOutput(). Is there any chance of a complete working example?

error: ‘class Ui::MainWindow’ has no member named ‘textEdit’

By: Marek Belisko

Marek Belisko — Thu, 27 Oct 2011 13:37:15 +0000

Well you can use write method to push some data to console app. Code snippet will help

By: srk

srk — Thu, 27 Oct 2011 13:05:05 +0000

Hi,
I am trying to build the GUI for an executable which processes algorithms.
I am able to start the process and give inputs. I am struck when the console application in the middle of the process looks for some input from the user.

Is there any way which notifies QProcess or interact with console app.
Your help would be life saver.

Regards,
Srk

By: Marek Belisko

Marek Belisko — Fri, 03 Sep 2010 13:16:06 +0000

Hi, good to hear you can find help from my experiments . Good luck

By: Lea

Lea — Fri, 03 Sep 2010 13:01:59 +0000

Hi Marek,
I just want to say thank you so much for this piece of code. I was nearly going mad, because I could not get my application doing this (displaying standard output in a textEdit or so). This helped me a LOT and my application is perfect now ) So – thank you )

By: Marek Belisko

Marek Belisko — Fri, 30 Oct 2009 07:32:33 +0000

Hi,

hmm maybe there’s some misunderstanding. test.c is program which write something to stdout and output from this program you will see in textEdit in QT application when you run it.
Just run QT executable which open test executable and read from test stdout. test executable must be in same directory like qt executable. Hope I don’t confuse you . If you have any problems type me an email I’ll send you code.

By: Danilo

Danilo — Fri, 30 Oct 2009 00:59:17 +0000

Hi, Marek

I did exactly what you said, and the program test.c don’t run on my app. It just appear a window with a blank textEdit inside.

What happened?

Thanks