GWT Whiteboard (freehand drawing)

Hey I'm trying to have a client draw freely (like MSPaint) onto a canvas, and have that data then be sent to another client where they can view and also draw. The project I'm working in is in GWT, so I'm looking for a way to accomplish this using Google's WebToolkit. The perfect example I have of this is found at: http://drawboard.appspot.com  only I have absolutely no clue where to begin. If you can point me towards any google searches (I've been doing many with nothing but failure) that'd be awesome! Or if you happen to know exactly how the above website implements this, that'd be perfect as well. Let me know!

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/ofG1FddHUfkJ.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.