Hello
I have an NSWindow, which my app controller is observing the value of
@"visible" keypath, with the following line
[previewWindow addObserver:self forKeyPath:@"visible"
options:NSKeyValueObservingOptionNew context:NULL];
Running my app, and triggering an IBAction that calls orderFront: on the panel
In 10.7, This works, I get a single "observation" that the key has changed.
However, in 10.6.8, I get no notification what so ever.
Now, changing the call to makeKeyAndOrderFront, in 10.7, I get *three*
notifications, saying its visible, its not visible, and finally, that it is
visible. On 10.6.8, I get *two* observations; its visible, and then its not
visible.
Whats going on here?
I was suggested to look into replacing observeValueForKey with a bind:
toObject: etc method, and bind the @visible parameter. This works in 10.7, but
again, 10.6.8 seems to ignore the @visible, or at least act on it oddly.
I have gist up on github with a summary. I am thoroughly confused, but expect a
trivial oversight. Anyone care to clear this up for me?
I need to know *exactly* when a window is onscreen, because a background OpenGL
drawing routine needs to know when it is safe to draw into the rendering view.
If I render too early, I can possibly throw OpenGL errors.
https://gist.github.com/1202249
Thank you in advance for any insight to this
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