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NSComboBox Delegates

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NSComboBox Delegates

Subject: NSComboBox Delegates
From: Charles Ross <email@hidden>
Date: Tue, 20 Jun 2006 09:18:59 -0700

I have an NSComboBox with the delegate set to my NSPersistentDocument subclass. I've successfully implemented a comboBoxSelectionDidChange method in the document class, but I also want to catch when the user changes the text without selecting something. I noticed that NSComboBox is a subclass of NSTextField and that this class has a delegate method for textDidChange, which, I would think, would cover the event where the user simply deletes the text in the NSComboBox or enters something not available in the menu. However, when I implement textDidChange in my document class it's never called (as demonstrated with its implementation having a single NSLog() function).

So, my question is, why? Do delegate methods of superclasses not get called? comboBoxSelecitonDidChange does get called, so the delegate is properly set. Am I simply going about this in the wrong way? Is there a better way to capture the user altering the entry in an NSComboBox by typing rather than using the menu?

Thanks,
Chuck Ross
Developer & Writer
mailto:email@hidden
AIM:mer0dyn
web:http://www.chivalrysoftware.com/


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