I did some more looking and determined that it should be
Item.selection.priority
When i do this, however, every time I switch back to another item, the
level defaults back to 1. Also, I checked that chapter in Hillegass's
book, and it had an example where it used Car.selection.condition, so
it seems that selection is the right controller key. The bindings in
general are just really funky. I added a stepper and textbox in
addition to the level indicator, and bound them to
Item.selection.priority, and they too default back to 1 (the default
value) every time I go to another item. The Item array controller's
Content Set is bound to ItemsList.selection.Item That's the only
binding, other than the managed object context. I really can't figure
out what's causing this problem, which is annoying because I'm trying
to focus on fixing this before I continue development.
Thanks,
- Walker Argendeli
On Mar 22, 2009, at 10:05 AM, Richard Somers wrote:
On Mar 21, 2009, at 3:41PM, Walker Argendeli wrote:
I'm using Core Data, and I have an entity; we'll call it "Item".
It has an attribute called "priority". In the xib, I have an
NSLevelIndicator and NSStepper. I have a NSTableView full of
"Items". Depending on which item is selected in the table view, I
want the level indicator and stepper to display the right values,
and for me to be able to set them to a certain value for each
item. There are 2 problems: If I bind the value of either one to
Item.arrangedObjects.priority, the app throws an exception, whereas
if I bind to Item.selection.priority, the controls don't set each
item's priority individually. What should I bind to?
Secondly, an NSLevelIndicator wants a float for its value, whereas
an NSStepper wants a double for its value. Which should I set it
to in the core data model?
Cocoa Programming for Mac OS X Third Edition by Arron Hillegass
Chapter 11, Basic Core Data, pages 171-182 has a NSLevelIndicator.
This chapter might shed some light on your problem.
Richard
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