Using control:textView:doCommandBySelector

FROM : Duncan Champney
DATE : Mon Feb 11 21:11:21 2008

I must confess, I don't get Cocoa bindings. I've used them for user 
defaults, and that's it.


My app has a number of NSTextField/slider pairs for inputting numeric 
values. I'd like to support having the up and down arrow keys increase/
decrease my values by a set amount, and having shift up/down arrow 
increase/decrease by 10x that amount. (much like PhotoShop does.)

I could do this by subclassing NSTextField and adding a new -keyDown 
method that handled the up and down arrow keys.The 
control:textView:doCommandBySelector method seems like a more elegant 
way to make this work.  However, I have no clue how to set up key 
bindings for my control fields in IB, and can't find any documentation 
to explain what I need to do.

In addition to needing some specific guidance on this particular 
issue, I'd also like to know a good reference (online or print) that 
explains using Cocoa bindings clearly, including working code 
examples? Most of the print manuals I use don't cover this subject.

Thanks in advance for any help you can offer.



Regards,


Duncan Champney