Wait command

[Richard Gaskin]

dunbarx wrote:

 > Wait is blocking. An idle handler will be locked out just like
 > everything else.
 >
 > But a line like "wait 0 with messages" does not seem to me to do much.

It undoes your first sentence.

It calls the equivalent of what we old readers of Inside Mac used to 
call GetNextEvent, allowing at least once complete cycle through the OS 
and application event loops.

This allows pending messages to be handled, and allows the OS interrupts 
enough space to be usable if something needs to be exited from, and 
allows the OS to update the screen.

A lot happens with that humble line, simply and with reasonable efficiency.

-- 
  Richard Gaskin
  Fourth World Systems
  Software Design and Development for Desktop, Mobile, and Web
  ____________________________________________________________
  Ambassador at FourthWorld.com        http://www.FourthWorld.com