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Speed and (sheets or panels)

I am currently have a real problem with speed, and it seems to be
thread related.

I read somewhere that the AppleScript code that is running within the
context of a panel is in a seperate thread to the main thread. My
experience indicates that this is true and that the panel thread is a
lower priority thread and this is mostly what I want. But I have
managed to code myself into a corner in one circumstance where this
behaviour is getting in my way and I don't know how to get out of it.

I am using the open panel dialog as follows

Code:

set thisPanel to open panel
tell thisPanel
set can choose directories to true
set can choose files to true
set allows multiple selection to true
set name to "openpanel"
end tell
display panel thisPanel attached to window "main"
return


The function returns immediately with the panel displayed. I then have
the on panel ended handler

Code:

on panel ended thePanel with result theResult
set the pathNames to (path names of open panel as list)
AddItemsToTable(pathNames)
end on panel ended


Now because the on panel ended function is still running in the panel
thread, and the panel is still displayed, AddItemsToTable which has a
lot of work to do is running in the low priority thread, and is snail
like slow. So I tried adding the files to a global list, and then using
the on idle handler to check the length of the list (I am using it for
something else as well) before doing the work. Unfortunately the on
idle handler also runs in its own low priority thread, so that doesn't
help.

I then thought of just using the standard additions choose folder or
choose file commands because they would just block the main thread
until they return. But unfortunately neither of them appear to allow
you to select both files and folders.

Has anybody got suggestions as to how to get around this.

Kevin
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