Ok, that’s explain also because onPositionChanged does not work.
The property has no signal notify changes. So, it means you cannot do what you
want.
So, my workaround is:
- define a property and animate this property
- refer this property into gradient
Rectangle {
id: myRect
property real gradPosition: 0.98
gradient: Gradient {
GradientStop{ … ; position: myRect.gradPosition }
…
Ciao,
Gianluca.
> On 18 Nov 2015, at 15:20, Jason H <jh...@gmx.com> wrote:
>
> A fantastic suggestion! However when I tried it I got:
> QQmlExpression: Expression qrc:/NextBar.qml:33:40 depends on non-NOTIFYable
> properties:
> QQuickGradientStop::position
>
> Does anyone know why these aren't NOTIFYable?
>
>
>> Sent: Tuesday, November 17, 2015 at 4:16 PM
>> From: Gianluca <gmax...@gmail.com>
>> To: "Jason H" <jh...@gmx.com>
>> Cc: "interest@qt-project.org" <interest@qt-project.org>
>> Subject: Re: [Interest] Animating a gradient
>>
>> Hello Jason,
>> why you don’t simple use property binding ?
>>
>> GradientStop { id: gs2; position: gs1.position+0.1; color: "dodgerblue" }
>>
>> and remove completely onPositionChanged
>>
>> Ciao,
>> Gianluca.
>>
>>
>> Il giorno 17/nov/2015, alle ore 20:39, Jason H <jh...@gmx.com> ha scritto:
>>
>>> I want to animate a gradient, but onPositionChanged gives an error, even
>>> though I can animate it. What am I doing wrong?
>>>
>>>
>>> Item {
>>> property alias color: container.color
>>> Component.onCompleted: anim.start()
>>> Rectangle {
>>> id: container
>>> width: parent.width * .9
>>> height : parent.height / 2
>>> anchors.centerIn: parent
>>> Rectangle {
>>> anchors.centerIn: parent
>>> width: container.height /2
>>> height: container.width
>>> rotation: -90
>>> gradient:Gradient {
>>> GradientStop { id: gs0; position: 0.00;
>>> color: "dodgerblue" }
>>> GradientStop {
>>> id: gs1;
>>> position: 0.98;
>>> color: "white";
>>> onPositionChanged: { // Cannot
>>> assign to non-existent property "onPositionChanged"
>>> gs2.position = position
>>> +.01
>>> }
>>> }
>>> GradientStop { id: gs2; position: 0.99;
>>> color: "dodgerblue" }
>>> GradientStop { id: gs3; position: 1.00;
>>> color: "dodgerblue" }
>>> }
>>> }
>>> }
>>>
>>> NumberAnimation {
>>> id: anim
>>> target: gs1
>>> property: "position"
>>> duration: 2000
>>> easing.type: Easing.InOutQuad
>>> loops: Animation.Infinite
>>> from: .98
>>> to: 0
>>> }
>>> }
>>> _______________________________________________
>>> Interest mailing list
>>> Interest@qt-project.org
>>> http://lists.qt-project.org/mailman/listinfo/interest
>>
>>
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