Re: Tons of fun w/NSComboBox
Re: Tons of fun w/NSComboBox
- Subject: Re: Tons of fun w/NSComboBox
- From: Don Arbow <email@hidden>
- Date: Thu, 14 Aug 2003 10:35:40 -0700
On Wednesday, August 13, 2003, at 12:52 PM, Jonathan E. Jackel wrote:
>
> If I override (NSString *)completedString:(NSString *)substring, does
>
> it
>
> apply to every NSComboBox on my app, or does it apply only to a
>
> particular
>
> NSComboBox?
>
>
The latter. You should subclass NSComboBoxCell and write your own
>
implementation of completedString. In awakeFromNib, you should set
>
the cell
>
of the combo cox to be an instance of your subclass. Your
>
implementation
>
will work only for instances of your subclass, so it will only work for
>
combo boxes where you have explicitly set the cell to be your cell.
>
In Cocoa, you very rarely need to subclass objects in the AppKit.
According to the documentation for completedString: in NSComboBoxCell,
you can do it this way:
The default implementation of this method first checks whether the
combo box uses a data source and whether the data source responds to
comboBox:completedString: or comboBoxCell:completedString:
Also take a look at the documentation for NSComboBoxDataSource, this
explains the use of the completedString: method used by the data source.
Don
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