I am trying to implement a to-one relationship using a
NSPopUpButtonCell on a NSTableColumn. This will be much like the
'Priority' column in mmalc's 'ToDo' Cocoa bindings example.
Working off Apple's documentation at http://developer.apple.com/
documentation/Cocoa/Conceptual/CocoaBindings/Tasks/onerelation.html
this should be pretty straightforward. Probably is.
The catch is that the possible values for the relationship will not
be the same on each line. I actually want them to be provided by the
business object represented by the table's row.
I tried populating the array controller used as values list for the
pop-up button by binding its contentArray to a key on my
NSTreeController's arrangedObjects. This leads to the following
runtime error message: [<_NSControllerTreeProxy 0x390b70>
valueForUndefinedKey:]: this class is not key value coding-compliant
for the key applicableTypes.
I also tried binding to observedObject.applicableTypes. No joy.
Now I am at a loss. I wouldn't know where else to get access to the
current row / NSTreeController item in order to determine the list
of values.
TIA for your thoughts.
Pierre
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