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Using MCL choose-file-dialog in CLIM is a problem Date: Fri, 13 Dec 1991 10:23-0500 From: John Doleac <>

   I have written ACCEPTING-VALUES dialogs to prompt 
   users for a pathname, but if the user is using MCL,
   I would prefer to use their CHOOSE-FILE-DIALOG 
   function (it does just what I want, and looks good,

   The problem is that if you mouse on the CANCEL button,
   the CLIM frame gets cancelled, too.  

   Unwind-protect doesn't help.

   Any ideas?

When you click on a Cancel button in an MCL dialog box the CANCEL
function is called, which throws to the nearest :cancel tag.  If
you're calling CHOOSE-FILE-DIALOG directly then you need to wrap the
call in a CATCH-CANCEL form (i.e., catch the tag yourself).

The MCL top-level loop catches this tag, which would explain why the
application frame exited instead of an error ("Can't throw to tag
:CANCEL") being signalled.




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