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inside custom component

Native Development

Posts: 160
Registered: ‎01-27-2012
My Device: Playbook
My Carrier: Rogers

How far do signal propagate in QML

[ Edited ]

I had the following code that used to work.  Not sure what I modified, but it doesn't work any more. I have a series of animations that can execute.  Whenever any of the animations are complete I'm looking to send an exitComplete signal so that I can reset the animation.    I've now added a few extra default signal handler so it definitely doesn't work - just not sure how to go back.   Its a sereis of custom qml components.  How many parents upwards does a  signals propagate in QML.  Where should you position the signal handler and the signal.  Is there a way to affect the progation (eg.  adding a signal handler at one level stops propagation)? 


I've read this thread:



But doesn't state where to position things or how it propagates clearly.



Container {
    id: animContainer
    objectName: "AnimContainer"
    signal exitComplete; //signals reset animation
    animations: [
        Hyperout {
            id: hyperoutanimid
/* onEnded: { exitComplete(); console.log("animSlide hyperout onEnded") } onExitComplete: { console.log("animSlide hyperout onExitComplete") }*/ } ] TiledSlide { } onExitComplete: {
resetanim() console.log("onExit Complete***") } }


import bb.cascades 1.0

ExitAnimation {
    ParallelAnimation {
        objectName: "Hyperout"
        RotateTransition {
            toAngleZ: 100
            duration: 1000
        ScaleTransition {
            toX: .75
            toY: .05
            duration: 1000


import bb.cascades 1.0

SequentialAnimation {
    signal exitComplete()
    onEnded: {
        console.log("hyperout onEnded")

 [Edit]  I've got it working again now by removing the  signal in Exit Animations and the onEnded and onExits in Hyperout in main, but I still would love some clarification about how the signal and signal handlers work.

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Posts: 671
Registered: ‎03-21-2012
My Device: BlackBerry PlayBook 16GB
My Carrier: Vip

Re: How far do signal propagate in QML

I don't know whether this will be of use in your case, but it provides good overview about touch propagation https://developer.blackberry.com/cascades/documentation/dev/touch/touch_propagation.html