There is a bug in my submitted patch -- it doesn't handle topX and topY when computing the converted coordinates, resulting in inability to reach the left or top edges of the screen with the tablet when topX or topY is greater than zero. I've fixed this problem in an additional patch available in bzr branch lp:~pdm-j/wizardpen/888794 (and attached here).
There is a bug in my submitted patch -- it doesn't handle topX and topY when computing the converted coordinates, resulting in inability to reach the left or top edges of the screen with the tablet when topX or topY is greater than zero. I've fixed this problem in an additional patch available in bzr branch lp:~pdm-j/wizardpen/888794 (and attached here).