Is it possible to bind the null placeholder in Cocoa?

Question

I have a table where certain cells will be nil until the user fills them in, but I was hoping that I could change the null place-holder (i.e. the value it displays when the particular value for that cell is nil) depending on other parts of the application the user has already filled in or configured. Sort of like an auto-complete but not quite.

Is it possible to bind the null place-holder value or will I have to emulate this behaviour manually?

Edit:
To clarify, I'm looking for a solution to have distinct place-holder values for individual cells, not a single place-holder value to apply to the entire table or entire table column.

Answer 1

The placeholder value is passed as part of the options dictionary when a binding is created. Since a value in a dictionary is not something that can be bound, I don't think there's any "automatic" way to do this.