[Interest] Animating a gradient

[Jason H]

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 <gmaxera at gmail.com>
> To: "Jason H" <jhihn at gmx.com>
> Cc: "interest at qt-project.org" <interest at 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 <jhihn at 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
> > 	}
> > }
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>