RotationAnimation: how to rotate about non-center coordinates?

bob_self

I'm using RotationAnimation for the first time. This works fine. The image
is 190 x 44 pixels and rotates about the center at x=95, y=22. I would like
to have it rotate about 164, 22 instead. How can I do this with
RotationAnimation? If it can't be done this way, what is the proper way to
do it?

RotationAnimation on rotation {
from: 0
to: 360
duration: 3000
direction: RotationAnimation.Clockwise
loops: Animation.Infinite
}

jpnurmi

import QtQuick 2.6
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640
    height: 480

    Rectangle {
        width: 190
        height: 44
        color: "red"
        anchors.centerIn: parent

        transform: Rotation {
            origin.x: 164
            origin.y: 22

            RotationAnimation on angle {
                from: 0
                to: 360
                duration: 3000
                direction: RotationAnimation.Clockwise
                loops: Animation.Infinite
            }
        }
    }
}

jpnurmi

You can use QML Rotation.

bob_self

Yes. I tried that and it works except that I don't know how to animate this solution.

thanks,
Bob

jpnurmi

import QtQuick 2.6
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640
    height: 480

    Rectangle {
        width: 190
        height: 44
        color: "red"
        anchors.centerIn: parent

        transform: Rotation {
            origin.x: 164
            origin.y: 22

            RotationAnimation on angle {
                from: 0
                to: 360
                duration: 3000
                direction: RotationAnimation.Clockwise
                loops: Animation.Infinite
            }
        }
    }
}

bob_self

Yes. That's what I was looking for. Thank you!