Xamarin Skiasharp笔触的OnClick功能

Question

如何在Skiashark笔划上启用onclick功能？ 我制作了具有多个路径的圆形图：

https://i.stack.imgur.com/ngiz6.jpg

例如绿线：

SKPaint paint4 = new SKPaint
{
    Style = SKPaintStyle.Stroke,
    IsAntialias = true,
    Color = Color.FromHex("#5bd363").ToSKColor(),                   // Overlay Colour of Radial Gauge
    StrokeWidth = progressUtils.getFactoredWidth(radialGaugeWidth + 15), // Overlay Width of Radial Gauge
    StrokeCap = SKStrokeCap.Butt                                  // Round Corners for Radial Gauge
};

SKPath path4 = new SKPath();
path4.AddArc(rect, (360 / 24) * 9.25f + 90, (float)sweepAngleSlider3.Value);
canvas.DrawPath(path4, paint4)

我如何做到这一点，以便当您单击笔触（例如绿色的笔触）时发生某些事情？