C# (CSharp) DrawingCanvas.CaptureTouch示例

        private void DrawingCanvas_OnTouchDown(object sender, TouchEventArgs e)
        {
            DrawingCanvas.CaptureTouch(e.TouchDevice);

            Ellipse follower = new Ellipse();

            follower.Width  = follower.Height = 50;
            follower.Fill   = SelectedColor;
            follower.Stroke = SelectedColor;

            TouchPoint point = e.GetTouchPoint(DrawingCanvas);

            follower.RenderTransform = new TranslateTransform(point.Position.X, point.Position.Y);

            _Followers[e.TouchDevice] = follower;

            DrawingCanvas.Children.Add(follower);
        }