Question

I want to build WPF multi-touch drawing app that user can use many fingers to draw strokes.

So, I tried to use inkcanvas but it can draw only single stroke.

using System.Windows.Ink;

How do I use inkcanvas to draw multi-stroke?

Thanks,

Hong Limp

Answer 1

If you have Windows 7 and are using WPF4, you should be able to use multi-touch if your input device supports it. If your input device does not support multi-touch, you can simulate it with two mice using the HID device from Multi-Touch Vista by following these instructions:

• Step by Step Tutorial : Installing Multi-Touch Simulator for Silverlight Phone 7

As the article demonstrates, you can test your multi-touch input driver on Windows 7 using the classic Paint application.

Update:

Alas, I can confirm that an InkCanvas in WPF4 does not support multiple strokes, only multi-touch gestures. However, I did find and test a sample that provides a similar effect:

• Introduction to WPF 4 Multitouch

Download the sample and use the TouchDrawing project.