Re: [Qt-qml] Error with PropertyAction/SequentialAnimation/Timer
Thanks,
That works!
The behaviour does seem slightly strange though - I would expect the JS
function to complete and THEN have everything else updated, but as long as I
know that this is the current behaviour I can create code accordingly.
Thanks again
Mark
-Original Message-
From: Adriano Rezende [mailto:adriano.reze...@openbossa.org]
Sent: 07 December 2010 19:16
To: Mark Tucker
Cc: qt-qml@trolltech.com
Subject: Re: [Qt-qml] Error with PropertyAction/SequentialAnimation/Timer
On Tue, Dec 7, 2010 at 12:59 PM, Mark Tucker mark.tuc...@airborne.aero wrote:
Timer {
id: textTimer
interval: 5000
repeat: true
running: true
triggeredOnStart: true
onTriggered: {
listIndex++;
if (listIndex = model.count) {
listIndex = 0;
}
//console.log(listIndex: + listIndex +
count: + model.count)
textAnimation.start();
}
}
}
For some reason the PropertyAction is being called when listIndex is 3
and hence causes an error due to an undefined value. I'm failing to see
how it should ever be the case that listIndex should be 3 when the
PropertyAction does its thing though.
I believe QML will reevaluate a JS statement each time you change a
bindable property contained in that statement. So, even if the
animation is not running, model.get(listIndex).dataString will be
reevaluated when listIndex changes.
So, in order to solve this problem you can change the code below:
listIndex++;
if (listIndex = model.count) {
listIndex = 0;
}
for the following:
listIndex = (listIndex + 1) % model.count;
Br,
Adriano
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Re: [Qt-qml] Error with PropertyAction/SequentialAnimation/Timer
On Tue, Dec 7, 2010 at 12:59 PM, Mark Tucker mark.tuc...@airborne.aero wrote:
Timer {
id: textTimer
interval: 5000
repeat: true
running: true
triggeredOnStart: true
onTriggered: {
listIndex++;
if (listIndex = model.count) {
listIndex = 0;
}
//console.log(listIndex: + listIndex +
count: + model.count)
textAnimation.start();
}
}
}
For some reason the PropertyAction is being called when listIndex is 3
and hence causes an error due to an undefined value. I'm failing to see
how it should ever be the case that listIndex should be 3 when the
PropertyAction does its thing though.
I believe QML will reevaluate a JS statement each time you change a
bindable property contained in that statement. So, even if the
animation is not running, model.get(listIndex).dataString will be
reevaluated when listIndex changes.
So, in order to solve this problem you can change the code below:
listIndex++;
if (listIndex = model.count) {
listIndex = 0;
}
for the following:
listIndex = (listIndex + 1) % model.count;
Br,
Adriano
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