[Bug 6967] CSpy/Month Calendar: Wrong date gets selected

http://bugs.winehq.org/show_bug.cgi?id=6967

--- Comment #8 from Nikolay Sivov   2009-09-28 18:52:30 ---
Created an attachment (id=23817)
 --> (http://bugs.winehq.org/attachment.cgi?id=23817)
Fix hittesting and buttonup handling

This one seems to be a pretty obvious to fix.

The problems are:
- wrong hittesting for previous month leads to unreachable previous month days
except day 31/30;
- wrong hittesting for next month increment a year when it shouldn't;
- lbutton up handler looks strange, it definitely act just like a prev/next
buttons, maybe it was workaround for a broken hittesting.

Attached patch fixes these three issues, I'll try to produce acceptable patch
this week.