Drawing things on a Canvas

Question

How would I draw something on a Canvas in C# for Windows Phone?

Okay, let me be a little more clear.

Say the user taps his finger down at 386,43 on the canvas. (the canvas is 768 by 480)

I would like my application to be able to respond by placing a red dot at 386,43 on the canvas.

I have no prior experience with Canvas whatsoever.

If this is too complex to be answered in one question (which it probably is), please give me links to other websites with Canvas and Drawing articles.

Answer 1

There are various ways of doing this. Depending on the nature of the red dot, you could make it a UserControl. For a basic circle, you can simply handle your canvas' ManipulationStarted event.

private void myCanvas_ManipulationStarted(object sender, ManipulationStartedEventArgs e)
{

            Ellipse el = new Ellipse();
            el.Width = 10;
            el.Height = 10;
            el.Fill = new SolidColorBrush(Colors.Red);
            Canvas.SetLeft(el, e.ManipulationOrigin.X);
            Canvas.SetTop(el, e.ManipulationOrigin.Y);
            myCanvas.Children.Add(el);
}