Question

I have a timer and when the time is equal to a certain time, ie. 5 seconds, 10 second, 12 seconds. I want it to do something.

What is the best way of constantly checking the timers value to see if it matches my value?

Answer 1

Polling the time of a QTime is a bad idea. You have QTimer for that, which uses the hardware timer facilities of your platform. Set up a single-shot QTimer to 5 seconds. Connect its timeout() signal to a slot, and in that slot reprogram the QTimer for your next interval. The general concept of that is:

int intervals[] = {5000, 10000, 12000};
// Alternative:
// int intervals[] = {5000, 5000, 2000};
int currentInterval = 0;
QTimer timer; // Make sure you set this up a single-shot timer.

// ...

// slot
void handleTimeout()
{
    ++currentInterval;
    // You should probably use a QList<int> instead in your real code and query size().
    if (currentInterval >= sizeof(intervals) / sizeof(intervals[0])) {
        // We're done.
        return;
    }
    timer.start(intervals[currentInterval] - intervals[currentInterval - 1]);
    // Alternative:
    // timer.start(intervals[currentInterval]);
}