onLineLaidOut: (line) => {
            line.width = width / 2  - main.margin

            if (line.y + line.height >= height) {
                line.y -= height - main.margin
                line.x = width / 2 + main.margin
            }

            if (line.isLast) {
                lastLineMarker.x = line.x + line.implicitWidth
                lastLineMarker.y = line.y + (line.height - lastLineMarker.height) / 2
            }
        }