Re: No refresh of buffer before popup-menu

[Jason Rumney]

Lennart Borgman (gmail) wrote:
> I consider this bug and I can see other bugs here that seems related. 
> Though I do not know if these bugs are only related to the w32 port.

I can't comment, because I don't know which bugs you are referring to. 
This particular one is specific to w32, because the event handling on 
w32 is different than on X. Events on Windows arrive on a different 
thread, and in the case of popup menus, need to be processed on that 
thread because the Lisp thread is waiting for popup-menu to return and 
won't process its message queue during that time. On X, events are 
received by callbacks into the same thread of execution, so it can be 
safe there to perform redisplay while it isn't on Windows.