Re: [Scribia-dev] GUI!

[Lark <lar...@ya...>]

on 2/21/01 12:48 AM, Charles Lechasseur at da...@sy... wrote:

>> Aye. Threads are actually pretty simple to add in powerplant IIRC.
>> The effort involved is in redesigning the app structure to be
>> thread-friendly. Unless we want to put each CScribiaDoc in its own
>> thread - is it bad to have UI in different threads?
> 
> i'm not sure. on Classic MacOS, i guess it doesn't matter because as long
> as you don't yield, no one else is going to fiddle with the display. that
> said, it's usually a bad practice to interact with the GUI directly within
> a thread. it's best to have the thread make a request that will be handled
> in the main thread.

Yes. And in a sense having the scanner update the shared data structures
(while holding the lock) can be seen as making such a request. The GUI can
then periodically pull the changes in (re-render the output).

Threading really only makes sense for the scanner, I think. All other tasks
are not computationally expensive enough to benefit from threading.
-- 
Lark <lar...@ya...>