Hi everyone,

A friend of mine is trying to write an app that will flash something on the
screen for a small number of milliseconds (variable - between say 50 and
300 ms).

We wrote some code that does it, but with the delay in between displaying
this box anything less than about 180 ms, it doesn't actually appear on the
display.

Basically, he's got a Form, say about 150 x 120 in size, and is doing
something like this:

	firstForm displayOn: Display at: 100 @ 100.
	(Delay forMilliseconds: 3000) wait.
	secondForm displayOn: Display at: 100 @ 100.
	(Delay forMilliseconds: 100) wait.
	firstForm displayOn: Display at: 100 @ 100

So, we get the first form for 3 seconds, and then the second form is
supposed to appear for say 100 ms, and is then replaced by the first form
again.

The problem is the form doesn't actually show up on the screen at all. Is
there some background process that is gathering copyBits calls in the VM
and then only updating the screen once in a while?

I know we can do this using the #step function and a morph, but right now
we've already implemented it this way without Morphic, and I'd love to know
what the problem is...

BTW, he's running 3.4, with the display depth set to 16 bits, running on
Windows NT. I tried the same thing on my laptop, running XP, and got the
same behavior...

Later,
Jon

--------------------------------------------------------------
   Jon Hylands      Jon at huv.com      http://www.huv.com/jon

  Project: Micro Seeker (Micro Autonomous Underwater Vehicle)
           http://www.huv.com