Ever since iCal was released, Cocoa developers have wanted to duplicate its custom colored checkboxes
(<a href="http://www.apple.com/ical/images/index_multiple09112003.jpg">these things</a>). Just a note
that I've improved my iTableView source code to include the ability to create an iCal-style checkbox
of any color.
Essentially, there's a method to which you pass an NSColor and a BOOL (whether or not the checkbox
should be checked), and an appropriate NSImage is returned. It could easily be used to create an
NSButtonCell subclass, for example. I've updated the <a href="http://mattgemmell.com/ftp/source/itableview.tgz">iTableView source code</a>
to include the new functionality. Here's a <a href="http://mattgemmell.com/ftp/source/itableview_screenshot.jpg">screenshot</a>.
Besides the colored checkboxes, iTableView includes NSTextFieldCell and NSImageCell subclasses to
display the blue gradient highlight found in iCal, iTunes and the Panther Finder. The grey gradient
will show if the relevant view isn't focused, as in iCal etc. Also, the NSImageCell subclass has been
updated to behave better with flipped images.