Avoiding mouse polls

David Vaughan dvk at dvkconsult.com.au
Sat Dec 14 01:24:00 EST 2002


Afterthought: I should have mentioned that the messages would be caught 
at card or stack level.
regards
David

On Saturday, Dec 14, 2002, at 17:14 Australia/Sydney, David Vaughan 
wrote:

>
> On Saturday, Dec 14, 2002, at 15:32 Australia/Sydney, Ken Norris 
> (dialup) wrote:
>> ----------
>> Sure, that's basically the idea. But unless I'm missing something, I 
>> don't
>> see any possibility of "catching" a mouse click with out polling for 
>> it. I
>> don't think it can be done any other way, but I'd like to know if it 
>> can.
>> Maybe there is a special Rev thing which I haven't seen.
>>
>> This is for impaired users who can only use a single switch, and 
>> cannot
>> operate a mouse or other motion device. Like Stephen Hawking. No 
>> choice
>> about that part.
>
> Ken
>
> What is wrong with mouseUp and mouseRelease rather than polling for 
> the mouseClick? You need to catch both because you can not predict 
> (and do not care) where the mouse went down, but these will work, will 
> they not? No object is involved (except for whatever you yourself are 
> highlighting for them).
>
> You can highlight objects by using a counter to iterate through the 
> keys of an array from which you take the object IDs. That way, you 
> have easy programmatic control of the object highlight sequence 
> without having to fiddle with the code which actually orders the 
> highlights.
>
> Old programming proverb: "You can always add a layer of indirection."
>
> regards
> Aavid
>>
>> Best regards,
>> Ken N.
>>
>>
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>>
>




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