[Qt-interest] About QProcess :How to read stdoutput realtime?

[Princy K. V.]

Hi,

Thanks for ur reply.

But slot is not invoked when I used these signals
readyReadStandardError () & readyReadStandardOutput (

..so I used following code snippets, this consumes lot of
time..sometimes not getting desired output..

 

void CMainWindow::Run()

{

QByteArray byteArray;

byteArray.resize(2000);

byteArray.clear();

ui->plainTextEdit->setEnabled(true);

ui->plainTextEdit->clear();

while(!Start())

{

//progress->hide();

byteArray.clear();

byteArray=process->readAllStandardOutput();

ui->plainTextEdit->appendPlainText(byteArray);

}

}

 

void CMainWindow::Start()

{

.......

process->start("xx.exe" ,arguments);

if (!process->waitForStarted())

return false;

// ui->statusBar->addPermanentWidget(progress , 0);

if(!process->waitForFinished())

{

//progress->setMinimum(0);

//progress->setMaximum(0);

//progress->show();

return false;

}

......

return true;

}

 

 

 

________________________________

 

u are using this signals right ,



void readyReadStandardError ()

void readyReadStandardOutput ()

 

On Tue, May 5, 2009 at 1:04 PM, Princy K. V. <princy.kv at nestgroup.net>
wrote:

Hi,
 I m new to Qt.I want to display datas that are written on stdoutput by
an external process on my gui. I have started external process using
Qprocess. I can display all stdoutput data by calling,
byteArray=process->readAllStandardOutput();
ui->plainTextEdit->appendPlainText(byteArray);
But my reqiurment is to display data(line by line) same time it is
written on stdoutput.i have tried many methods.so far didn't get
required output..
Please suggest me some solutions..
Thanks..
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