Re: Should delta raise exception when not available?

[Banlu Kemiyatorn]

for deltaY, as the mouse moves up the screen, the value is negative;
and as it moves down the screen, the value is positive.
http://tinyurl.com/6b36n3s
We have it working in backward.

On Fri, Dec 24, 2010 at 1:18 AM, Fred Kiefer <address@hidden> wrote:
> Am 22.12.2010 13:32, schrieb Banlu Kemiyatorn:
>> 2010/12/22 Fred Kiefer <address@hidden>:
>>> Sorry Banlu,
>>>
>>> I missed this second mail. This explains my stupid question.
>>> I had a short look at the Apple documentation and you are right, it
>>> doesn't state what happens when this method is called on the wrong event
>>> type. Most likely we jst extrapolated the behaviour from the other
>>> methods on NSEvent. The better way to find out is of course to write a
>>> short test program on Cocoa and implement the same behaviour.
>>> I will do that and add this to our test suite.
>>>
>>> Fred
>>
>> Hi Fred,
>> That should be me, I sent the second mail coz DrNHS bugged me my first
>> question was lacking of info.
>>
>> AFAICT it didn't happen in Cocoa since I have the problem only when
>> porting an app I released called Helicropper from a working OSX
>> version. But even if it does, I hardly see why someone would expect a
>> delta to raise an exception than giving a zero.  If they are catching
>> stray events they probably should check for event type.
>>
>> BAnlu
>
> Done, I will provide the promised test case later one. Tests on Cocoa
> showed that your proposal is correct.
>
> Fred
>
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