Key double pressed Event

ashajg

Hi guys

I want to run a piece of code on double "ENTER KEY" pressed.
Can you suggest some solutions for this?

Thanks
Ashish

ODБOï

@ashajg hi,
I don't know a ready to use solution
you can start a timer (with desired intervall and reapeat:false) when first pressed Event occurs, then when you press second time check if the timer is still running, if yes It is a double if no it is not.

Shrinidhi Upadhyaya

Hi @ashajg , i dont know if there is any other way or any property in KeyEvents which maintains the count or handles the double press event of the key, i have written a sample code by using timer,please have a look into it.

Rectangle {
        id: root

        anchors.fill: parent
        focus: true
        color: "red"

        Text {
            id: txt

            anchors.centerIn: parent
            color: "Yellow"
        }

        property int count: 0

        onCountChanged: {
            if(count === 2)
                doSomething();
        }

        Keys.onPressed: {
            txt.text = "Pressed"
            if (event.key === Qt.Key_Return) {
                root.count = root.count + 1;
                if(root.count === 1) {
                    doublePressTimer.start();
                }
                else {
                    doublePressTimer.stop();
                }
            }
        }

        Timer {
            id: doublePressTimer

            interval: 500
            running: false

            onTriggered: {
                console.log("Triggered")
                root.count = 0
            }
        }

        function doSomething() {
            console.log("Inside function")
            txt.text = "Double Enter Key Pressed"
            count = 0
        }
    }

ODБOï

edited:

   Item{
        focus: true
        Timer{
            id:dblCheckTimer
            interval : 500 // you have to double press quicker than 500ms
            repeat: false
            running : false
            onTriggered: console.log("Timeout")
        }
        Keys.onPressed: {
            if (event.key === Qt.Key_Return) {
                if(!dblCheckTimer.running){
                    console.log("waiting 2nd press...")
                    dblCheckTimer.start()
                    return
                }
                else{
                    console.log("DOUBLE !")
                    dblCheckTimer.stop()
                }
            }else{
                if(dblCheckTimer.running){
                    console.log("canceled !")
                    dblCheckTimer.stop()
                }
            }
        }
    }

fcarney

I would add a condition that if the timer is running and different key comes in, then it stops the timer. Otherwise a fast typist could inadvertently trigger the event. Is this in an editor? Because double return could happen in an editor quite easily.

ashajg

@fcarney @LeLev @Shrinidhi-Upadhyaya
Thanks for the solution I ll try this.

JonB

@ashajg

@fcarney said in Key double pressed Event:

I would add a condition that if the timer is running and different key comes in, then it stops the timer.

To add to this: it's not just that a different key should stop the previous key press's timer, it should restart/recreate a new timer against this new key press (in case that turns out to be the start of of a double-ENTER, e.g. sequence is <ENTER> <some other key> <ENTER> <ENTER>).. Standard stuff.