3 pages circular ListView

Cuke

I managed to create a 3 pages circular listview. However i came to this solution by a try/change/execute process. Is there someone that can help me understand the x,y coordinates of the PathLines?
Given a width of 500px for each rectangle the three points of the path are: -250, 750, 1250.
But in my opinion this doesn't make sense. I thought that the correct answer would be -250, 250, 750.

@import QtQuick 2.0

Item
{
id: root
width: 500
height: 500

Path
{
    id: path
    startX: -(width / 2); startY: root.height / 2
    PathLine { x: width + (width / 2); y: root.height / 2}
    PathLine { x: (2 * width) + (width / 2); y: root.height / 2}
}

Component
{
    id: delegate
    Rectangle
    {
        width: root.width
        height: root.height
        color: model.color
    }
}

ListModel
{
    id: model
    ListElement { color: "red" }
    ListElement { color: "green" }
    ListElement { color: "blue" }
}

PathView
{
    anchors.fill: parent
    path: path
    clip: true
    delegate: delegate
    model: model
    snapMode: PathView.SnapOneItem
}

}

@