You are right, Phil. The following two examples do exactly the same:
example a)
on mouseUp
beeper 2
end mouseUp
on beeper x
beep x
end beeper
example b)
on mouseUp
set the beeper of this stack to 2
end mouseUp
setprop beeper x
beep x
end beeper
There really is no difference between the getprop/setprop handlers
and commands and functions in this respect. The only difference is in
the way they return a value. Commands return a value in "the result",
functions in "it" and getprop/setprop handlers in a property.
If there is no getprop/setprop handler to catch the message,
Revolution will return the value to or from the specified property.
If there is such a handler, the handler may return the value or pass
the message on to Revolution. If the message is passed on, Revolution
returns the value.
Thus, Jim's original approach was correct. You can use setprop
handler to check a value before a property is changed:
setprop someProperty theValue
if theValue is "the correct value" then
pass someProperty
end if
end someProperty
Is this still confusing?
Best,
Mark
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Op 27-apr-2006, om 7:13 heeft Phil Davis het volgende geschreven:
I believe they work the same way 'closeCard', 'preOpenCard' and
'openCard' messages work when your script says 'go next card'.
Those messages are fired *during* the execution of your 'go'
command, and any like-named handlers in the path will complete
before the 'go' command completes. The messages are an inherent
part of doing the command, and they are fired at specific points
during execution of the command; any handling of those messages
will pause the command that fired them until handling is complete;
then control is returned to the original command (e.g. 'go'), and
it continues on its way.
Am I answering what you're asking, Jim?
Phil
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