Timer running on mouseArea.pressed

[ealione]

I had the idea of making a button that only if held for some time it would unlock its functionality. If pressed and released immediately nothing would happen.

I am at the point where I created my button (a cute circular one) that when pressed animates to a scale 1.2 times bigger its original size and the text changes from 'Press and Hold' to 'Hold'.

I also placed an arc around this button, that will act as a circular loader and will reach 100% at the time the button is finally ready to be released.

What I am not sure how is done though is having a function with a timer that kicks in as long as the button is pressed and after the required time (lets say 2s) has passed will emit a signal or do whatever else the button is supposed to do.

Any tips would be welcomed.

[mcosta]

Hi,

soon (in Qt 5.5) you'll have this.

BTW, you should have a timer that

• is started when the button is pressed
• is stopped when the button is released
• expires after the interval

so you can catch the timeout signal and execute your function

[ealione]

Hi mcosta, weird thats exactly what I am making. I had no idea it would be included in 5.5

The thing is that not only I want my timer to expire after the lets say 2 seconds, but I also want it to update my circular loader in the meantime. And I don't know how to do that.

[ealione]

I moved a little bit using the following

Timer {
        id: elapsedTimer
        interval: 10; running: false; repeat: false
        onTriggered: canvas.timeChanged()
    }

function timeChanged() {
        canvas.currentValue = canvas.currentValue + 1
        if(canvas.currentValue >= 100) {
            // here I must emit a signal
        }
    }

Now I will enter inside the if condition at the desired time. But what should I do once I am in there?
Can I somehow emit a signal so whoever is using the button can attach to it?