TIDAL-Lab/ComputerMuseum — pull request #1 by jirkadanek (2012-10-27 16:14:04+00:00)
Title: Fix a Block::containsTouch method

I do not have Surface, so when I run your program I tried clicking around ;-) I noticed the exception

Exception: type 'Null' is not a subtype of type 'bool' of 'boolean expression'.
Stack Trace: #0 TouchManager.findTouchTarget (/ComputerMuseum/Touch.dart:83:29)

apparently Block::containsTouch was returning null instead of false, which caused this exception down the callchain. As it seemed obvious how the containsTouch should look like, I took the liberty of changing it.