arrowkey and selectionchanged in a list field

[David Glasgow]

On 24 Jun 2007, at 2:12 pm, Eric Chatonet wrote:

>
> Hi David, Mark, Richard, etc.
>
> Le 23 juin 07 à 17:43, Richard Gaskin a écrit :
>
>> Mark Smith wrote:
>>
>>> On 23 Jun 2007, at 11:15, David Glasgow wrote:
>>>>  Unfortunately, selectionchanged is not sent if the selection   
>>>> is  changed via arrow keys.
>>> That's weird - I use this successfully in several projects:
>>>   on selectionChanged
>>>    showInfo the hilitedLine of me -- the handler that displays  
>>> info  about the list item
>>> end selectionChanged
>>> and it certainly works with the arrow keys, without any spcial   
>>> scripting....
>>> Is there some property of the list field that you've set or unset?
>>
>> I get the same reliable result here in many applications I use  
>> list fields in.
>>
>> Dave, is the traversalOn property set?  The only way I can not get  
>> the desired behavior is to turn that property off; with it on it  
>> works like a champ.
>>
>> -- 
>>  Richard Gaskin
>>  Managing Editor, revJournal
>
> I have to apologize: you are right.
> I confused with a case I wanted arrow keys to act as a carousel  
> then needed to script it.
> Thanks for this clarification.
>
> Best regards from Paris,
> Eric Chatonet.

Well I'll be jiggered! You are absolutely right!  Selection changed  
by arrowkeys *does* cause the selectionchanged message to be sent

I read this in the dictionary (emphasis added):

"The selectionChanged message is sent to a field whenever the user  
makes a text selection or moves the insertion point in the field,  
after the selection is changed. *The selectionChanged message is not  
sent if the user uses the arrow keys to change the selection. To  
respond to use of the arrow keys, handle the rawKeyUp message and  
check the selection within the handler.*"

....and believed it, so I didn't test to see if it was true, but set  
about scripting the arrow key handler.

Now, should I feel irritated I wasted time on an unnecessary handler,  
or happy that Rev does what I thought it ought to do in the first  
place *and* this list once again comes up trumps?

I think this list tips the scale towards happy :-))



Best Wishes,

David Glasgow
Carlton Glasgow Partnership

http://www.i-psych.co.uk