在没有画布的QML中绘制虚线圆

import QtQuick 2.15
import QtGraphicalEffects 1.15

Item {
    width: 200
    height: 200

    property int radius: 100
    property int dashLength: 10

    PathView {
        id: pathView
        anchors.fill: parent
        model: 360 / dashLength
        pathItemCount: model.count

        delegate: Path {
            startX: parent.width / 2 + radius * Math.cos(index * dashLength * Math.PI / 180)
            startY: parent.height / 2 + radius * Math.sin(index * dashLength * Math.PI / 180)
            PathLine {
                x: parent.width / 2 + radius * Math.cos((index + 1) * dashLength * Math.PI / 180)
                y: parent.height / 2 + radius * Math.sin((index + 1) * dashLength * Math.PI / 180)
            }
        }
    }

    Rectangle {
        width: parent.width
        height: parent.height
        color: "transparent"
        border.color: "black"
        border.width: 1
        radius: parent.width / 2
        layer.enabled: true
        layer.effect: OpacityMask {
            maskSource: pathView
            invert: true
        }
    }
}