On Oct 5, 2010, at 9:47 PM, Paul McNett wrote:
>> That's simple enough - in the code that checks the whether deletion is
>> allowed, add a UI notification. Set the status bar, change a tool tip -
>> something to explain why they can't delete.
>
> Sure, but why go through those processing cycles unless they explicitly *try*
> to delete?
Because you want an interface that changes based on the current
situation, or you risk surprising them. Of course, you can let them click
'Delete' and then find out that they're not allowed to do that; that's
something that you have to work out with your users.
-- Ed Leafe
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