Total pain in the stack

[xbury.cs at clearstream.com]

Amazing, I post the problem and stumble on the solution...

The crashing stacks had a mutant version of the script below.

The difference was 
on scrollbarDrag x
  ...

I made a test with half of the fields without the x param, and the other
half with...
Mousewheel Scrolling over the missing param, didn't cause trouble, on the
other fields, crash the stack...

Why would that affect the script, I dont know... 
There is no reference to a parameter in the definition of scrollbardrag,
there is an "argument" but the command <<send "scrollbardrag 0" fld "Source"
of group "schedule">> cannot work... OR?
Nonetheless, this parameter is enough to crash everything when affected... 

What really puzzles me is that even though I reassign theTHE SCROLLVALUE TO
THE VARIALBE X IN THE FIRST LINE OF THE HANDLER AND THAT SCROLLBARDRAG IS AN
EVENTMESSAGE AND NOT A FIELD PROPERTY the X variable 

Scott, that's a seriously dangerous parameter... 
It should be removed or deactivated under certain condition 
which could cause these endless/unstoppable (cmd-c) loops...

sorry to have bothered everyone! Hope it'll save you a few dozen stack
corruptions...

cheers
Xavier



> -----Original Message-----
> From: xbury.cs at clearstream.com [mailto:xbury.cs at clearstream.com]
> Sent: 24 January 2002 13:10
> To: metacard at lists.runrev.com
> Subject: Total pain in the stack
> 
> 
> 
> For the zillionth time, I have MC going bananas in a 
> recursive loop without
> reason.
> 
> Maybe someone can tell me if they get the same behavior... 
> 
> This may or will result in MC stop responding, and/or your stack
> corrupted... beware...
> 
> Recipee:
> Have a mousewheel mouse, NT4 sp5, W98SE, MetaFrame NT4 sp5
> Make 4 to 5 scrolling fields (list behavior optional), 
> add the script below (modifying correspondingly for each field to
> synchro-scroll/select the others), 
> save the scripts...
> 
> While still in edit mode (not browse yet), go with your 
> cursor over one of
> the field, and use your mousewheel.
> When I do this, all the fields start jerking around up and 
> down, and MC must
> be killed - nothing else will work, and
> your PC's CPU usage will just jump skyhigh...
> 
> Is this my MC implementation or is it standard behavior of MC 2.4bx?
> 
> Thanks for any answers/solutions, Im desperate saving every 
> change I do to
> avoid crashes...
> 
> <Field SCRIPT>
> on mousedown
>   lock screen
>   put word 2 of (the selectedline of me) into x
>   set the hilitedline of fld "Source" of group "schedule" to x
>   set the hilitedline of fld "destination" of group "schedule" to x
>   set the hilitedline of fld "movedate" of group "schedule" to x
>   set the hilitedline of fld "MoveDrive" of group "schedule" to x
> end mousedown
> 
> on scrollbarDrag
>   put the scroll of me into x
>   set the scroll of fld "Source" of group "schedule" to x
>   set the scroll of fld "destination" of group "schedule" to x
>   set the scroll of fld "movedate" of group "schedule" to x
>   set the scroll of fld "MoveDrive" of group "schedule" to x
> end scrollbarDrag
> 
> 
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