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Re: Bindings alert issue
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Re: Bindings alert issue


  • Subject: Re: Bindings alert issue
  • From: Quincey Morris <email@hidden>
  • Date: Tue, 11 Nov 2008 18:15:56 -0800

On Nov 11, 2008, at 17:21, Ashley Clark wrote:

If you want to make sure that the validation error is bound to the window regardless of how commitEditing is implemented you need to call commitEditingWithDelegate:didCommitSelector:contextInfo: and then in the method you pass in as the didCommitSelector you can check to see if there were any errors and then use presentError:modalForWindow:delegate:didRecoverSelector:contextInfo: to attach them to your window.

Whether commitEditing should be showing a separate window or a sheet is not documented anywhere that I see, whether that's a bug or a feature I'm not sure.

commitEditing always uses a separate alert window because it is synchronous (doesn't return till the alert is dismissed). Only asynchronous things use sheets.


Remember also that bindings-triggered validation (via the validate<key> method) uses a sheet, but only after the next pass through the run loop. And closing the window doesn't trigger anything by default. Or quitting the application. And there are interactions between undo and text fields that are actively being typed in.

The semantics of committing edits in a long-lived window like a document window seem rather tricky to me. In the end, I gave up trying to do it, and used dialogs (sheets) with good ol' OK and Cancel buttons instead.


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References: 
 >Bindings alert issue (From: "Jim Thomason" <email@hidden>)
 >Re: Bindings alert issue (From: Ashley Clark <email@hidden>)

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