Isn't this list great? After an hour of debugging, all you have to do
is send an email and few minutes later your problem is solved :-)
It turned out that the bug was this: I poked around master NSTableView
and it had a binding of 'content' to the same master array controller
that was also bound to table column (with the key 'name'). I guess I
clicked inadvertently and set this binding. Now why this prevented
selection notifications I do not know. After I removed this 'content'
binding everything worked as it should.
But it again confirmed that bindings are not quite what they should
be. This bug should never happen to me or should be resolved in 5
minutes: InterfaceBuilder should prevent illegal combinations or there
should be a debugging option that would show me which binding step in
runtime is failing. This kind of magic which bindings are doing can
only work when one has access to the source code, so debugging is
possible. Currently, if bindings don't work, you can only click around
and hope something turns out. Not satisfactory at all.
To stop ranting and be constructive, is there a way of debugging
bindings that would uncover this kind of bug?
izidor
On 23.7.2008, at 18:11, Izidor Jerebic wrote:
Hello!
I have a very simple (one would think) master-detail arrangement:
there is a domain object, which has several items, each of items has
several parts.
In the GUI window which represents domain object, one array
controller is bound to FileOwner.items (file owner is a domain
object), and this is displayed in NSTableView and it works fine.
Then there is another array controller, which is bound to first
array controller's selection and model key path 'parts'. This is
displayed in NSCollectionView.
The problem is that when selection is changed in NSTableView,
nothing at all changes in NSCollectionView. I have inserted NSLog in
the 'parts' method and it is called exactly once - when the nib is
loaded....
So the parts are displayed only once for the first selected item,
and afterwards nothing changes, despite the change of selection.
Now, can somebody suggest what am I doing wrong or how can I debug
this not-working setup?
Thanks in advance,
izidor
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