Question

Ok, so I’m having this problem tonight:

[...]   

connect(startButton, SIGNAL(clicked()), this, SLOT(startCalculation()));
connect(stopButton, SIGNAL(clicked()), this, SLOT(stopCalculation()));

[...]

void MainWindow::startCalculation()
{
   qDebug() << "hello";
   this->startButton->setDisabled(true);
   this->stopButton->setEnabled(true);
   this->calcStatus = true;
   this->calculate();
}

void MainWindow::stopCalculation()
{
    this->startButton->setEnabled(true);
    this->stopButton->setDisabled(true);
    this->calcStatus = false;
}


void MainWindow::calculate()
{
   qDebug() << "hello";
   while(this->calcStatus)
   {
   }
}
[...]

I’m trying to make the calculate() procedure stoppable any time, but right after it is started I loose control and I can’t press STOP. Of course in my future plans calculate() is going to “calculate” something real (e.g. heat transfer simulation).

Thanks for suggestions.
P.

Answer 1

You would need to look into threading. The calculation locks the ui.