Question

I am looking for a clock/timer that can be started, stopped and can return the elpsed time since the start. Is there a widget that does all of these things?

Thx

Answer 1

You can use QTime or QElapsedTimer, but they are not QObjects, so you’ll need to wrap them in a QObject class if you need to be able to start and stop them through Qt signals.

class Timer : public QObject {
    Q_OBJECT
public:
    explicit Timer(QObject *parent = 0): QObject(parent) {}    
public slots:
    void start() {
        time.start();
    }
    void stop() {
        emit elapsed(time.elapsed());
    }
signals:
    void elapsed(int msec);
private:
    QTime time;    
};