On Aug 17, 2011, at 6:30 PM, Conrad Shultz wrote:
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> On 8/17/11 3:11 PM, Michael Crawford wrote:
>> For those who are interested, here is a simple answer to my
>> original question.
>>
>> @implementation NSTextView (csstest)
>>
>> -
>> (NSDraggingSession*)beginDraggingSessionWithItems:(NSArray*)items
>> event:(NSEvent*)event source:(id<NSDraggingSource>)source { return
>> nil; }
>>
>> That's it.
>
> Please don't do that.
>
> It is usually bad practice to override(*) a method in a category. It
> is highly fragile, particularly because you don't know (and shouldn't
> care) how the frameworks are implemented internally.
Yep, I know.
>
> Furthermore, wherever the category gets picked up, you are overriding
> that method. So when you have some other NSTextView (or subclass
> thereof) that you DO want to support dragging, it will (inexplicably)
> not work.
>
Yep. I know that too. Not applicable. There will be NO dragging.
> Finally, I will note that the particular method you chose is 10.7+
> only, so this presumably won't work at all on Snow Leopard and
> earlier. I recall that you said this is for an internal project, so
> maybe that's OK, but personally I wouldn't jump on a Lion-only
> approach this early on for something which has very good and more
> broadly compatible alternate solutions.
>
Yep. I know. Your right. I agree, not my call.
> I would STRONGLY encourage you to reconsider your approach and perhaps
> try what I previously suggested vis-a-vis the responder chain. Though
> I obviously can't see what you are doing in its entirety, I get the
> impression that you are painting yourself into an uncomfortably small
> corner by - wait for it - "fighting the framework."
>
Not my call, either. I make sure clients have all the info and then do as I'm
told. I find I get paid better when I don't ignore their directives.
> *: To be very clear here, I am talking about OVERRIDING a method, not
> the intended use of categories which is to ADD a method.
>
>
> - --
> Conrad Shultz
>
> Synthetiq Solutions
> www.synthetiqsolutions.com
>
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Conrad, thank you for your concern. I know you want me and others reading this
thread to follow practices that are safe and lead to robust resilient software.
I only wanted to post for completeness. What I was looking for was a specific
answer to a technical question. Since no-one had the answer, I posted it.
The answer was the API call not the category override, in which it was
implemented, FOR TESTING.
Thanks, guys.
-Michael
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