import QtQuick 2.0

Rectangle {
    width: 400
    height: 400

    states: State {
        name: "state1"
        PropertyChanges {
            target: myItem
            x: 200 - myItem.y
        }
    }

    Rectangle {
        id: myItem
        objectName:  "myItem"
        width: 100
        height: 100
        color: "green"
        x: 100 - myItem.y

        Binding on x {
            when: myItem.y > 50
            value: myItem.y
        }
    }
}