[Qt-interest] query on QProcess

[Princy K. V.]

Hi,,

 I have a query on QProcess..Plse see the code snippets below...

The actual running time of xx.exe for a particular argument is 7
minutes...But when  started from my qt application..it takes longer
time,, and system become too slow,,cpu usage goes to 100
percentage...why is it so?? Is it due to memory leakage??

Do I need to release memory allocated for Qprocess by using stmnt '
delete process' or 'delete this ' in destructor sufficient?Plse
help...thanks in advance..

 

void CMainWindow::Run()

{

process = new QProcess(this);

connect(process, SIGNAL(readyReadStandardError()), this,
SLOT(updateError()));

connect(process, SIGNAL(readyReadStandardOutput()), this,
SLOT(updateText()));

connect(process, SIGNAL(finished(int)), this, SLOT(updateExit(int)));

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

}

void CMainWindow::updateText()

{

while(process->canReadLine())

{

QByteArray data = process->readLine(200);// The Application turns to not
responding when a line is added to
//listwidget..

 

 

ui->listWidget->addItem(QString(data));

QScrollBar *bar = ui->listWidget->verticalScrollBar();

bar->setValue(bar->maximumHeight());

ui->listWidget->setAutoScroll(true);

ui->listWidget->scrollToBottom();

ui->listWidget->repaint();

}

}

 

Thanks & Regards,

princy

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