[bug #36967] Manual Key Value Observing Not Using Passed Objects

[Robin]

Follow-up Comment #2, bug #36967 (project gnustep):

Hi Richard, I realise that my original posting was a bit short on details so I
have put together a short program (attached) to show the behaviour under OSX
Lion when posting manual kvo notifications.

Here's the output under OSX. I can also compare with your modifications under
Linux when I get a chance.

However the first thing I notice is that the OSX implementation does seem to
query the keyPath property for the willChangeValueForKey:  but then uses the
passed object for doing whatever set delta operation you specify.

Output on OSX is :
2012-08-02 22:17:13.724 kvohow[4207:303] >>DataClass setValue '(null)' now
renamed to 'initial value'
2012-08-02 22:17:13.727 kvohow[4207:303] >>DataClass setValue 'initial value'
now renamed to 'changed value'
2012-08-02 22:17:13.729 kvohow[4207:303] >>DataClass 'value' property has been
queried.
2012-08-02 22:17:13.817 kvohow[4207:303] Observer: keyPath 'value' change '{
    kind = 1;
    notificationIsPrior = 1;
    old = "changed value";
}'
2012-08-02 22:17:13.818 kvohow[4207:303] >>DataClass setValue 'changed value'
now renamed to 'observed value'
2012-08-02 22:17:13.819 kvohow[4207:303] >>DataClass 'value' property has been
queried.
2012-08-02 22:17:13.820 kvohow[4207:303] Observer: keyPath 'value' change '{
    kind = 1;
    new = "observed value";
    old = "changed value";
}'
2012-08-02 22:17:13.822 kvohow[4207:303]   -- Manual Notifications --  
2012-08-02 22:17:13.823 kvohow[4207:303] ** addToSet - willChangeValueForKey
2012-08-02 22:17:13.824 kvohow[4207:303] >>DataClass 'data' property has been
queried.
2012-08-02 22:17:13.825 kvohow[4207:303] Observer: keyPath 'data' change '{
    kind = 2;
    new = "{(n    "A New Object"n)}";
    notificationIsPrior = 1;
}'
2012-08-02 22:17:13.826 kvohow[4207:303] ** addToSet - didChangeValueForKey
2012-08-02 22:17:13.827 kvohow[4207:303] Observer: keyPath 'data' change '{
    kind = 2;
    new = "{(n    "A New Object"n)}";
}'
2012-08-02 22:17:13.828 kvohow[4207:303] ** addToSet COMPLETE
****************
2012-08-02 22:17:13.829 kvohow[4207:303] ** replaceInSet -
willChangeValueForKey
2012-08-02 22:17:13.830 kvohow[4207:303] >>DataClass 'data' property has been
queried.
2012-08-02 22:17:13.831 kvohow[4207:303] Observer: keyPath 'data' change '{
    kind = 3;
    notificationIsPrior = 1;
    old = "{(n    "A New Object"n)}";
}'
2012-08-02 22:17:13.832 kvohow[4207:303] ** replaceInSet -
didChangeValueForKey
2012-08-02 22:17:13.832 kvohow[4207:303] Observer: keyPath 'data' change '{
    kind = 3;
    old = "{(n    "A New Object"n)}";
}'
2012-08-02 22:17:13.833 kvohow[4207:303] ** replaceInSet COMPLETE
****************
2012-08-02 22:17:13.834 kvohow[4207:303] ** removeFromSet -
willChangeValueForKey
2012-08-02 22:17:13.835 kvohow[4207:303] >>DataClass 'data' property has been
queried.
2012-08-02 22:17:13.835 kvohow[4207:303] Observer: keyPath 'data' change '{
    kind = 3;
    notificationIsPrior = 1;
    old = "{(n    "Something else"n)}";
}'
2012-08-02 22:17:13.836 kvohow[4207:303] ** removeFromSet -
didChangeValueForKey
2012-08-02 22:17:13.837 kvohow[4207:303] Observer: keyPath 'data' change '{
    kind = 3;
    old = "{(n    "Something else"n)}";
}'
2012-08-02 22:17:13.838 kvohow[4207:303] ** removeFromSet COMPLETE
****************

Rgds,
Robin


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