How Start a Qthread from qml?

Question

I need to Start immediately and stop then a QThread extended class from Qml File. Is there any solution for that? here is my class :

class SerialManager : publi         


        

Answer 1

Yes, you can expose an instance to QML using setContextProperty (read this document) and then call any method you want by marking it with Q_INVOKABLE. As start() and quit() are slots you don't even need to define those yourself. Something like this should work:

class MyThread : public QThread
{
    Q_OBJECT
public:
    MyThread() : m_quit(false) {}

    Q_INVOKABLE void quit() {
        m_quit = true;
    }

protected:
    void run() {
        while (!m_quit)
            qDebug("Looping...");
    }

private:
    volatile bool m_quit;
};

when starting:

MyThread t;
QQuickView view;
[...]
view.engine()->rootContext()->setContextProperty("thread", &t);

In your QML:

thread.start()

or

thread.quit()