unlimited undo's for text fields
J. Landman Gay
jacque at hyperactivesw.com
Mon Feb 28 10:34:43 CST 2005
On 2/28/05 8:44 AM, Paul wrote:
> I think Dar is right in that a message is not sent when a modifier key
> is pressed on the Mac, but one can check to see if a modifier key is down.
Yes, but only while a handler is running. For example, you can test:
if the commandkey is down then...
but you cannot trap alone for the commandkey:
because no message is sent unless the user has also pressed an
alph-numeric key at the same time. The same applies to the option key
and control key. Since there is no "shiftKeyDown" message in Transcript
anyway, you can't trap for that either.
Within a handler, the best way to test for keys that are down is with
the keysDown() function. But that also fails for command and option
keys; it does work for shift key however.
So there is no good way to get a signal when the command key, shift key,
or option key are depressed alone if you need to trap for that behavior
on a Mac.
As for how other games do it -- I don't know. Scott Raney told me it
wasn't possible, because the OS sends no message. So I am not sure how
other game programs manage it.
Jacqueline Landman Gay | jacque at hyperactivesw.com
HyperActive Software | http://www.hyperactivesw.com
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