thumbPosition and Simple Math

Jim Hurley jhurley at
Sat Feb 26 12:09:45 EST 2005

>Message: 16
>Date: Sat, 26 Feb 2005 08:42:21 -0600
>From: Derek Bump <webmaster at>
>Subject: thumbPosition and Simple Math
>To: How to use Revolution <use-revolution at>
>Message-ID: <42208ACD.9030606 at>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>Are there bugs that occur when using Math in conjunction with a
>thumbPosition reading.  I've noticed that the following...
>on scrollBarDrag
>     put the thumbPosition of me into theNum
>     add 50 to theNum
>     put theNum into fld "result"
>end scrollBarDrag
>When I do it, I don't get the current thumbPosition + 50, I get the
>current pixel position + 50.
>Anyone else seeing this?
>Derek Bump
>Dreamscape S


Your script works for me (OS X).

Try looking in the scrollbar inspector. Use the tiny arrows to 
increase the thumbposition. You should see the position of the thumb 
change on the scrollbar *and* the value in field should increase but 
remain 50 units greater than the thumbposition.


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