Refreshing a card

[Mark Smith]

Hello all, by now most of you are probably familiar with my silly questions
(born of, I am afraid, too many years engrossed in procedural programming
languages). Here we go. I have a menu option called "Toggle Date Stamp" and
it toggles on/off the display of a date stamp on the card. When you select
it you might expect that the card goes from displaying the date stamp to not
displaying the date stamp ad infinitum. Not so. In fact nothing changes. If
I move off the card and then back on I see the correct behaviour but not
while I am actually on the card (or any card). I am guessing that in the
Toggle Date Stamp menu code (below) I need to send a message to the card to
"refresh" itself. But what message?

 case "Toggle Date Stamp"
         set the showDateStamp of this stack to not the showDateStamp of
this stack
         -- insert some message to get the current card to "redisplay"
itself
         break
   end switch

(Note, yes the showDateStamp property is in the stack because it effects the
behaviour of all of the cards, not particular ones. Hopefully I've got that
bit of logic right :-)

Thanks for your patience,

-- Mark
-- 
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