Re: NSPredicateEditor
Re: NSPredicateEditor
- Subject: Re: NSPredicateEditor
- From: Peter Ammon <email@hidden>
- Date: Wed, 25 Jun 2008 13:12:36 -0700
Hi Chris,
If the holds down the option key and clicks a + button, it will insert
another compound row, so the user can make arbitrarily complex
predicates. If this doesn't seem to happen, make sure the nesting
mode is set to compound.
By default, NSPredicateEditor supports And, Or, and Not compound
types, where "Not" is interpreted as Nor, that is, "None of the
following are true".
-Peter
On Jun 25, 2008, at 7:19 AM, Chris wrote:
Cool.
Now I notice that if you manually plug in a complex predicate like
"a = b or c = d and e = f", that it is capable of displaying it
correctly.
Do you know if there is any way to allow the user to create more
complex expressions? By default it only seems to allow either AND or
OR, but not both from the user, even though the machinery seems to
know how to display things more complex.
On 25/06/2008, at 11:57 PM, Jim Turner wrote:
On Wed, Jun 25, 2008 at 1:08 AM, Chris <email@hidden> wrote:
Let's say I create a NSPredicateEditor and it looks like this:
--------------------
[All] of the following are true:
--------------------
[Name] equals [ ]
-------------------
So the user enters say "Fred" and the predicate returned is "Name
== Fred".
Later on, I reload that predicate into the NSPredicateEditor and
it looks
like this:
--------------------
[Name] equals [ Fred ]
-------------------
But now there is no option to change it to say:
[Some] of the following are true:
because that line isn't shown.
How do I make that line reappear the next time?
By default, the NSPredicateEditor object in IB creates a compound
predicate. Wrap your "Name == Fred" predicate in a compound
predicate
before reloading it in the editor and the Any/All/None row should
return.
--
Jim
http://nukethemfromorbit.com
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