Re: [MacPerl-Toolbox] forwarding events

[ajf@afco.demon.co.uk (Alan Fry)]

Jan Hofmann writes 11 July 1999:

>There's one special thing about the command:
>
>key Key
>
>This suggests that key takes an integer value (the key value)
>as parameter. But key uses internally the function:
>
>_dialogselect Key
>
>which expects a hash or an object as parameter.
>And using:
>
>$dlg->key(0) or
>$dlg->key() instead of
>$dlg->key($ev->key)

Yes -- you're quite right. I'd never looked at _dialogselect() before but
doing so now I see any argument passed to it is ignored anyway. So that
explains your findings. The subroutine just uses $CurrentEvent and passes
that as an argument to DialogSelect(). In this case $CurrentEvent would be
the key press event.

Maybe DialogSelect() is the Toolbox function that does all the work? One
would have to look it up in Inside Macintosh. I regret I have no idea how
it all works in the sense of how and where the TextEdit routines are picked
up. It's very clever stuff, for it would take a considerable amount of code
to do what Dialogs does behind the scenes, even with the help of the
TextEdit routines.

Alan Fry



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