Re: [Repost] Subclassing NSTableColumn

FROM : Jonathan Jackel
DATE : Sun Nov 10 21:30:09 2002

on 11/9/02 3:51 AM, Ken Tozier at <email_removed> wrote:

> I need to create a subclass of NSTableColumn so that it can display
> several different types of data and controls in it's cells but I'm not
> sure how to get the table to use my subclass rather the the default one.

You have to do this programmatically, not in Interface Builder.  In
awakeFromNib: you would create an instance of your KTTableColumn, then use
[NSTableView addColumn:] to add your column to your view.  Then you might
have to move the columns around (moveColumn:toColumn:) to get them arranged
right.

> Also, I'm not entirely sure exactly how to override data members in an
> opaque Cocoa class. Ideally, I'd like to replace "dataCell" in
> NSTableColumn with an NSArray and cache the three or four different
> button and field types in this array. Would I subclass NSTableColumn,
> add something like a "dataCells" field and override the corresponding
> accessor methods by writing my own versions with the exact same method
> name?

You don't necessarily have to subclass NSTableColumn to do this.  You can
use [NSTableColumn setDataCell:] to swap out the cells as necessary.
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