ROLLOVER FADES

 

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Apply to a sprite and set the beginning and ending opacity and the duration for the blend (in frames). On a rollover the sprite will fade from the beginning to the ending opacity. On a mouseleave it will fade back to the beginning opacity.

-- ROLLOVER FADES -- Kendall Anderson, kpander@home.com, http://members.home.com/kpander -- may 21 / 99: kendall anderson, initial coding -- jul 07 / 99: kendall anderson, revised to use blendlevel property -- apply to an image and set the initial and final blend values -- also set the length of time (frames) it should take to -- achieve the final blend -- mouseenter and mouseleave toggle the blending property pBegin    -- beginning blend value property pEnd      -- ending blend value property pDur      -- how many frames should it take for the full effect property pCount    -- keep track of how long we are taking property pMode     -- #none, #on, #off property Spritenum on beginsprite me     -- convert fade values to value between 0 and 255   -- (for using the blendlevel property)   pBegin = float(pBegin) / 100 * 255   pEnd = float(pEnd) / 100 * 255     pMode = #none    -- on init, we aren"t fading anything   pCount = 0   pDur = pDur + 1     add the actorlist, me   end on endsprite me     deleteone the actorlist, me   end on mouseenter me     pCount = 1   pMode = #on   end on mouseleave me     pCount = 1   pMode = #off   end on getBehaviorDescription     dMsg = ""   dMsg = dMsg & "Apply to a sprite and set the initial and ending opacity value." & RETURN   dMsg = dMsg & "On a rollover the sprite will change opacity to the ending value." & RETURN   dMsg = dMsg & "On a mouseleave the sprite will return to the beginning opacity."     return dMsg   end on getPropertyDescriptionList     pList = [:]     addProp pList, #pBegin, [ #comment: "Beginning fade value (0-100%): ", #format: #integer, #default: 0 ]   addProp pList, #pEnd, [ #comment: "End fade value (0-100%): ", #format: #integer, #default: 100 ]   addProp pList, #pDur, [ #comment: "Duration (Frames):", #format: #integer, #default: 10 ]     return pList   end on stepframe me     if pMode = #none then exit     if pMode = #on then  -- fade on stage         if pCount < pDur then       dBlend = float(pCount)/pDur * pEnd       sprite(Spritenum).blendlevel = dBlend       pCount = pCount + 1           else       if sprite(Spritenum).blendlevel <> pEnd then         sprite(Spritenum).blendlevel = pEnd         pCount = pCount + 1       end if           end if       else if pMode = #off then -- fade OFF stage           if pCount < pDur then       dBlend = 255 - float(pCount)/pDur * pEnd     -- 255 is maximum blendlevel value       sprite(Spritenum).blendlevel = dBlend       pCount = pCount + 1           end if           end if   end