System "wget"command

[Kenneth Brody]

Quoting Brian K. White (Tue, 15 May 2007 14:44:03 -0400):
[...]
> best:
> video off ; system sa ; video on

That would have no effect, as filePro isn't sending anything to the
screen during the SYSTEM command.

> less good:
> system sa ; video sync

filePro forces a screen clear plus a full redraw upon return from a
SYSTEM command, so a VIDEO SYNC here is a no-op.

> even more kludgey but good to know for odd situations,
> echo "\014\c" in the system command

Again, the first thing filePro does upon return from SYSTEM is to
clear the screen, so (attempting to) clear the screen within the
SYSTEM command is irrelevent as far as filePro is concerned.

[...]
> also
> system sa ; pushkey "[DRAW]"

That may work, but all that it will really do is force filePro to
clear and redraw the screen a second time.

> and
> system sa ; show raw chr("12")

If outputting a Ctrl-L clears the screen, this will result in a clear
screen, with nothing else.

> video off ; system sa ; video on   should provide the cleanest
> experience for the user because instead of letting the screen get messy
> and then redraw it, it smply freezes the screen before it gets messy &
> while system runs so it never gets messed up, and doesn't need to be
> redrawn after.

VIDEO OFF will have no effect on the SYSTEM command.

> I don't know if system noredraw makes a difference in this case. even if
> it doesn't make a visual difference, it might be slightly faster from
> skipping the redraw step,

If the SYSTEM command displays anything, you typically want the redraw.

[...]

--
KenBrody at BestWeb dot net        spamtrap: <g8ymh8uf001 at sneakemail.com>
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