How to draw shapes in WP7 with the finger?

问题:

How to draw shapes in WP7 with the finger? I am trying to implement a simple paint application but I am not sure how to make the drawing.

回答1:

fingerpaint is your friend

• try it out on Ruby using http://script.iron7.com/#/Script/Detail?scriptId=FingerPaint&userLowerCaseName=iron7

• or in C# at http://sigurdsnorteland.wordpress.com/2010/10/20/fingerpaint-a-little-wp7-paint-app/

Note that the two sets of code aren't quite the same - the C# fingerpaint had some issues about drawing new tracks on top of old ones so I modified this when I wrote the Ruby one.

Also note that to take this further, you should probably support multitouch.

回答2:

There are two examples for you, you can download it from the below links.

Sample Project 1

Sample Project 2

回答3:

Line Handle the StylusDown, StylusMove, and StylusUp events. Draw lines as appropriate depending on if you want straight vs. free form lines.