QProcess, readyRead, QTextEdit

[sgrant327]

I want to be able to 'continuously' append the output of a command-line into a QTextEdit.

I have a GUI app that uses QProcess to start a command-line app. The CL app has tons of output via printf's.

I am current connecting to the readyRead() signal of the QProcess and using readAllStandardOutput() to post the info into the QTextEdit. The problem with this is that I only get the output once the CL app is finished.

What do I need to do to get the output as it happens?

TIA, Sam.

[high_flyer]

what happens if you use the readyReadStandardOutput () signal instead?

[stampede]

The CL app has tons of output via printf's

Is it your command line application ? If yes, you may consider flushing the stdout after printf:

printf("A text");
fflush(stdout);

printf("A text");
fflush(stdout);

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stdout is buffered, but it should flush automatically after reaching new line character.

Also try to set read channel for QProcess:

proc->setReadChannel(QProcess::StandardOutput);

proc->setReadChannel(QProcess::StandardOutput);

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[sgrant327]

Got it working better...

printf and fflush and QProcess::StandardOutput and readyReadStandardOutput () did the trick.

[stampede]

printf and fflush (...)

I think you can even disable buffering of the stdout in your app:

setbuf(stdout,NULL);

setbuf(stdout,NULL);

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