Scrollable Sprites

 

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For use with the Scroll Button Scroll Button, Scroll Thumb, and the Scroll Thumb Track behaviors This behavior allows the author to select direction for which the thumb (sprite) which will move when called by the ScrollButton behavior. It uses a global variable which is incremented by the ScrollButton behavior. NOTE: the motion of the sprite is opposite the direction of the scroll arrow and the scroll thumb.

property pMyRange        -- number of pixels that the sprite may move property pMyIncrement    -- number of pixels that the thumb sprite will advance per click property pMyStartV       -- initial locV of the thumb sprite property pMyStartH       -- initial locH of the thumb sprite global gScrollV          -- amount scroll has been incremented Vertically from initial value global gScrollH          -- amount scroll has been incremented Horizontally from initial value on getPropertyDescriptionList   set directionList = [#HORIZONTAL, #VERTICAL]   set p_list = [ ¬   #pMyRange:    [ #comment:   "Range of motion (in pixels)", ¬   #format:   #integer,¬   #default:   100] ¬   ]   return p_list end on beginSprite me   set pMyStartH = the locH of sprite the spriteNum of me   set pMyStartV = the locV of sprite the spriteNum of me   end on setThumbH me, thumbRange, thumbSprite   set pMyIncrement = pMyRange * 1.00/thumbRange   set the locH of sprite the spriteNum of me = pMyStartH - integer(gScrollH * pMyIncrement) end on setThumbV me, thumbRange, thumbSprite   set pMyIncrement = pMyRange * 1.00/thumbRange   set the locV of sprite the spriteNum of me = pMyStartV - integer(gScrollV * pMyIncrement) end on scrollH me   set the locH of sprite the spriteNum of me = pMyStartH - integer(gScrollH * pMyIncrement) end on scrollV me   set the locV of sprite the spriteNum of me = pMyStartV - integer(gScrollV * pMyIncrement) end

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