<![CDATA[Incrementing object values]]>Hello all,
Im starting now with QML programming and have small beginner problem. I think I still simply do not get bindig thing :)

What I want to do:
In case of each pressing button I want to rotate some image by adding additional 45 degrees. But how I can increment the rotation value?
@
states: State{
name: "move"
PropertyChanges {
target: buttonImage
rotation: 45
}
}

Currently I got smthg like:
transitions: Transition {
RotationAnimation{
duration: 500
direction: RotationAnimation.Clockwise
}
@

If I set: rotation: buttonImage + 45 i got binding loop.

Anybody knows?
BR
Thomas

]]>https://forum.qt.io/topic/40613/incrementing-object-valuesRSS for NodeWed, 12 Aug 2026 14:34:26 GMTWed, 23 Apr 2014 15:24:46 GMT60<![CDATA[Reply to Incrementing object values on Wed, 23 Apr 2014 15:58:58 GMT]]>Ahh sry :)
My bad.
You are right...
Didnt read to the end :P

]]>https://forum.qt.io/post/224612https://forum.qt.io/post/224612Wed, 23 Apr 2014 15:58:58 GMT<![CDATA[Reply to Incrementing object values on Wed, 23 Apr 2014 15:51:37 GMT]]>Ok, its working, but it doesn't animate the transform like when we use:
@
states: State{
name: "move"
PropertyChanges {
target: buttonImage
rotation: 45
}
}
transitions: Transition {
RotationAnimation{
duration: 500
direction: RotationAnimation.Clockwise
}
}
@

[edit: added missing coding tags SGaist]

]]>https://forum.qt.io/post/224613https://forum.qt.io/post/224613Wed, 23 Apr 2014 15:51:37 GMT<![CDATA[Reply to Incrementing object values on Wed, 23 Apr 2014 15:44:10 GMT]]>Hi,

@
import QtQuick 2.1
import QtQuick.Window 2.1
import QtQuick.Controls 1.1

Window {
visible: true
width: 360
height: 400

color: "grey"

Button {
    id: myButton

    anchors.horizontalCenter: parent.horizontalCenter
    anchors.top: parent.top
    anchors.topMargin: 20

    text: "rotate the box"

    onClicked: box.rotation = box.rotation + 45
}

// can be replaced by image
Rectangle {
    id: box

    width: 100
    height: 100

    color: "blue"

    y: 200
    x: (parent.width - width) / 2

    Behavior on rotation {
        NumberAnimation { duration: 200 }
    }
}

}
@

]]>https://forum.qt.io/post/224609https://forum.qt.io/post/224609Wed, 23 Apr 2014 15:44:10 GMT<![CDATA[Reply to Incrementing object values on Wed, 23 Apr 2014 15:38:41 GMT]]>Like I said before:
QML Image: Binding loop detected for property "rotation"

]]>https://forum.qt.io/post/224605https://forum.qt.io/post/224605Wed, 23 Apr 2014 15:38:41 GMT<![CDATA[Reply to Incrementing object values on Wed, 23 Apr 2014 15:37:34 GMT]]>rotation: rotation + 45
Does it work?

]]>https://forum.qt.io/post/224606https://forum.qt.io/post/224606Wed, 23 Apr 2014 15:37:34 GMT