Search code examples
c++loopsqtqthreadqtimer

How to start a loop on a QThread

How can I start a loop on a different thread by pressing a QPushButton?

The main idea is, when pushButtonStart is clicked, start a loop on a QThread, and when pushButtonStop is clicked, stops the loop in the QThread.

The loop can be done by QTimer, for loop or while loop, but he needs a way to stop by pressing a button.

Solution

  • I have this code to create a new timer and set up a connection when it fires. This is in the Start code.

    checkTimer = new QTimer(this);
connect( checkTimer, SIGNAL(timeout()), this, SLOT(checkTimerFired()) );
checkTimer->start(3000);

    My "stop running" button sets programCreated to false, and checkTimerFired starts with this:

    if (!programCreated) {
    checkTimer->stop();
    return;
}

    That should be the Qt-specific things you need. The rest is simple C++.