qtimer setsingleshot

QTimer is a class in Qt framework which is used to create and manage timers. The setSingleShot() function is a method of QTimer class which is used to set the timer to be a single-shot timer.

A single-shot timer is a timer which fires only once after the specified interval and then stops. It is useful when we want to perform a certain task after a specific delay or after a certain event occurs.

The syntax of the setSingleShot() function is as follows:

void QTimer::setSingleShot(bool singleShot)

where singleShot is a boolean value which specifies whether the timer should be a single-shot timer or not. If it is set to true, then the timer will be a single-shot timer, otherwise it will be a repetitive timer.

For example, the following code snippet creates a single-shot timer which will fire after 5 seconds:

QTimer *timer = new QTimer(this);
timer->setSingleShot(true);
timer->start(5000); // 5000 milliseconds = 5 seconds
connect(timer, &QTimer::timeout, [=]() {
    qDebug() << "Timer expired!";
});

In this example, we create a QTimer object and set it to be a single-shot timer using the setSingleShot(true) function. Then we start the timer with a delay of 5 seconds using the start(5000) function. Finally, we connect the timeout() signal of the timer to a lambda function which will print a message to the console when the timer expires.