Re: NSPopupUpButton not showing checked menu items
Re: NSPopupUpButton not showing checked menu items
- Subject: Re: NSPopupUpButton not showing checked menu items
- From: "Kyle Sluder" <email@hidden>
- Date: Sun, 23 Nov 2008 14:15:40 -0500
On Sun, Nov 23, 2008 at 10:51 AM, Steve Christensen <email@hidden> wrote:
> - (void) setInterpolationMode:(NSInteger)mode
> {
> [self willChangeValueForKey:@"interpolationMode"];
> _interpolationMode = mode;
> [self didChangeValueForKey:@"interpolationMode"];
>
> // set the title image to that of the current mode
> [[_interpolationModePopup itemAtIndex:0]
> setImage:_interpolationImages[mode]];
> }
>
>> Additionally, are you overriding +automaticallyNotifiesObserversForKey: or
>
> No.
If you are not overriding +automaticallyNotifiesObserversForKey:, then
why are you manually sending -willChangeValueForKey: and
-didChangeValueForKey:? You are already benefitting from automatic
KVO support (assuming your accessor is named -interpolationMode).
-willChangeValueForKey: and -didChangeValueForKey: are only for manual
KVO support, which requires overriding
+automaticallyNotifiesObserversForKey: to return NO for the key in
question: http://developer.apple.com/documentation/Cocoa/Conceptual/KeyValueObserving/Concepts/AutoVsManual.html#//apple_ref/doc/uid/20001844-178876
>> sending +setKeys:triggerChangeNotificationsForDependentKey: anywhere?
>
> Yes, for a couple of other controller keys that are dependent on the one
> above.
> They get set in my controller's +initialize method.
The reason I ask these questions is so that by examining your code, we
may figure out what's going wrong. The crucial step in this process
is the posting of code. ;-)
--Kyle Sluder
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