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mlRe: Deferring a selector until later, but before painting
FROM : John Stiles
DATE : Thu Mar 06 18:33:08 2008

Oh, wait… this requires Leopard :|
Is there anything that works with Tiger? I'm trying to avoid Leopard
dependencies when there are easy substitutes.


John Stiles wrote:
> Actually, in this case, it seems like a perfect fit for what I'm
> doing. I'm already using a subclassed view anyway. I will definitely
> take a look at -viewWillDraw:.
>
> BTW, views don't actually have delegates—many control subclasses do,
> e.g. NSTableView has one—but a plain NSView does not.
>
> Thanks, Ken! I'll let you know if this resolves my issue. I highly
> suspect that it will.
>
> j o a r wrote:

>>
>> On Mar 6, 2008, at 8:32 AM, Ken Ferry wrote:
>>

>>> Or can you do your final setup in -viewWillDraw?
>>>
>>> For some kinds of problems, you could synchronously mark whatever
>>> state you're interested as invalid, then resolve any invalidated
>>> state in -viewWillDraw.  This would be an appropriate way to do
>>> deferred layout, for example.

>>
>>
>> I think it's unfortunate to have to resolve to subclassing for this
>> type of problem - The OP might end up having to subclass several
>> different NSControl subclasses to make it work. Perhaps NSView should
>> provide some sort of notification or delegation scheme to supplement
>> this method?
>>
>> j o a r
>>
>>
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