A question about QProcess communication
I'm using Qt to develop a front end and I attached it to an existing program. I created a new QProcess Object and use it to start the existing program.
Here is the problem:
The existing program (we'll call it A afterwards) prints it to the stdout and I use the following code to get the signal readyReadStandardOutput():
@connect(A, SIGNAL(readyReadStandardOutput()), this, SLOT(updateOutPutEdit()));@
the SLOT updateOutPutEdit() will read all the standard output and print it to the terminal.
But I don't know whether A has a buffer or it's the QProcess' problem, the output will always stuck or display after a long time.
I don't know why...Does Qt has a buffer between the parents' process and the forked one?
This may be issue with event processing. Are you trying to read this before even starting the event loop ?