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Re: Problem with validation (reproducible with EventManager example)
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Re: Problem with validation (reproducible with EventManager example)


  • Subject: Re: Problem with validation (reproducible with EventManager example)
  • From: mmalcolm crawford <email@hidden>
  • Date: Sat, 3 Jun 2006 12:13:15 -0700


On Jun 3, 2006, at 11:57 AM, email@hidden wrote:

I think the validation should occur every time the user clicks on "Add", so it
isn't possible to add a second empty line. I activated "validates immediately"
for the value bindings of the columns, but it don't work.


Validates Immediately applies to new values set using the UI element...
If you allow your object to come into being in an invalid state, then it's up to you to remedy that.


Can someone help to implement the desired functionality?

It's up to you to determine what functionality you require. Do you want to always deny a change in selection if the currently-selected item is invalid (you probably also want to disable the Add button until a newly-inserted object is valid)? That could itself become frustrating...

One option is to ensure that your new objects are valid on insertion, either by supplying suitable values on creation, or by -- for example -- using a sheet for new data entry (see <http://homepage.mac.com/ mmalc/CocoaExamples/DepartmentAndEmployees2.zip>).

mmalc

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