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From: martynrlee on 20 Sep 2006 17:26
Hey All,

Can anyone help me with this:

I am struggling to find some basic code to use a draggable graphic (.psd) as a
scrollbar for a text box. I do however need the scrollbar to control 3 text
boxes (all in the same motion, same speed etc) so that I can use
rollovers/hyperlinks within the text area that im trying to scroll.

I have created a window around the text with the z values higher than the text
so that the text will scroll 'under' the window.

All help most appreciated with this one..

Mart.



From: Rob Dillon - Adobe Community Expert on 21 Sep 2006 07:43
Hi Mart,

A very simple text scroller can be made by using the scrolltop property
of the text or field member.

The total distance that a text or field member can be scrolled is the
difference between the height of the member and the height of the sprite
that shows that member on the stage.

Place a text or field member instance on the stage. Set the member's
framing property to "fixed".

You could use a behavior something like this attached to the scroll
button that you want to use. You will also need a constrainer sprite, a
bar, to run the scroll button against.

--------
property thisSprite -- the slider sprite
property constrainerSprite -- the constrainer bar sprite
property spriteToScroll -- the text or field sprite to be
scrolled
property totalScrollDistance -- the difference in pixels between the
member height and the sprite height
property constrainerHeight -- the height of the constrainer bar
sprite
property constrainerBottom -- the bottom locV of the constrainer
sprite
property animateMe -- a boolean variable to turn off and
on the scrolling calculation

on getPropertyDescriptionList
myPropList = [:]
myPropList.addProp(#constrainerSprite,[#comment:"enter the sprite
channel number for the constrainer line
sprite:",#format:#integer,#default:""])
myPropList.addProp(#spriteToScroll,[#comment:"enter the sprite channel
number for the sprite to be scrolled:",#format:#integer,#default:""])
return myPropList
end

on beginSprite me
thisSprite = me.spriteNum
totalScrollDistance = sprite(spriteToScroll).member.height -
sprite(spriteToScroll).height
constrainerHeight = sprite(constrainerSprite).height
constrainerBottom = sprite(constrainerSprite).bottom
animateMe = false
sprite(spriteToScroll).member.scrollTop = 0
end

on mouseDown me
animateMe = true
end

on mouseUp me
animateMe = false
end

on mouseUpOutside me
animateMe = false
end

on exitFrame em
if animateMe then
sprite(thisSprite).locV = the mouseV
-- get the position of this scroller on the constrainer bar as a
ratio...
buttonPosition = (constrainerBottom -
float(sprite(thisSprite).locV)) / constrainerHeight
sprite(spriteToScroll).member.scrollTop = totalScrollDistance *
buttonPosition
end if
end
-------------

You can have this same scroll button control more than one text or field
sprite by adding a property for each one, and a property for each one's
scroll distance. then set the scrolltop for each additional sprite by
adding new lines to the exitFrame function.

--
Rob
_______
Rob Dillon
Adobe Community Expert
http://www.ddg-designs.com
412-243-9119

http://www.macromedia.com/software/trial/
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