[MACTCL] tk8.6.6 event problems under OS X Lion

[Andy C. <an...@ac...>]

I have a large program which adds C event handlers for button-press, motion
and button-release.

 

This is used for drawing stuff in a window - press, drag mouse, release.

 

Under Lion (OS X 10.7), a user reports that it looks like a button release
is being issued before it's actually released.  The user is pressing,
dragging and before releasing, a release event is triggering. And, it sounds
like another press may be triggering before the actual mouse button is
released.

 

It also sounds like some key events are being lost - it seems to take a few
presses of a control+key before it's recognised.

 

The same program binary works fine under Snow Leopard (10.6.8), Yosemite
(10.10) and  El Capitan (10.11).

 

As I don't have Lion, it's obviously difficult to debug this problem.

 

My software with tcl/tk 8.5, with the same event code, works fine under Lion
but perhaps there's something different about the 8.6.6 event stuff under
Lion? Does this ring any bells with anyone?

 

Any help most gratefully received.  If you'd like to try the software, I can
send you a download link, but unless you have Lion, it looks like you won't
see the problem.

 

Andy