lextm/touchmousemate — comment on commit 5f72f26936da9d248f7159935b006f05ad23bee1
File:  line 0
By lextm:

It is still hard to make the difference large enough between a touch-over-click gesture and a finger move, even after changing the parameters. Therefore, in this revision, the left/right click zones are changed to top-half of the mouse surface. If you are going to utilize the default touch mouse gestures (scroll/pan, two fingers and three fingers), you should perform them in the bottom-half of the surface. This should partially reduce the chance of firing touch-over-click unexpectedly.