In a handler passed as a parameter to a handler in another script, how do I refer to top-level variables from the original script?

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In a handler passed as a parameter to a handler in another script, how do I refer to top-level variables from the original script?

Subject: In a handler passed as a parameter to a handler in another script, how do I refer to top-level variables from the original script?
From: DeNigris Sean <email@hidden>
Date: Tue, 28 Jul 2009 02:04:08 -0400

Example:

From my main script file:

-- A utility library

set expose_lib to load script alias "path:to:Scripts:My Library:Expose.scpt"

set UI_lib to load script alias "path:to:Scripts:My Library:UI.scpt"

-- Handlers in that will be used as parameters:

to return_to_space()

expose_lib's set_current_space(theCurrentSpace)

end return_to_space

on did_space_return()

return (expose_lib's current_space() is theCurrentSpace)

end did_space_return

-- Pass the handlers to another script

UI_lib's rerun({this_script:return_to_space, until_predicate:did_space_return})

The UI_lib file, containing a generic handler that takes handlers as parameters:

--rerun({this_script:code_to_run, until_predicate:my_predicate, or_seconds_elapsed:5})

to rerun(record_of_parameters)

set defaults to {or_seconds_elapsed:2}

set record_of_parameters to record_of_parameters & defaults

script usable_command

property theHandler : record_of_parameters's this_script

theHandler()

end script

script usable_predicate

property theHandler : record_of_parameters's until_predicate

theHandler()

end script

set start_time to (get time of (current date))

repeat while not (run usable_predicate)

run usable_command

if (get time of (current date)) - start_time > record_of_parameters's or_seconds_elapsed then

exit repeat

end if

end repeat

end rerun

When I run the script, I get "The variable expose_lib is not defined." because the script that's running is the UI_lib script. Is there any way I can do this without changing the rerun handler, which is a generic library handler?

Sean DeNigris

email@hidden

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