GameStar 1998 November (Bonus)/GAMESTAR11B.ISO/ENCYC99/MM/T620273A.DCR/scripts_42_Class ScrolledThing.ls

Text File | 1998-07-02 | 3.4 KB | 161 lines

property ScrollButtonGod, Slider, slidSprite, slidFirst, slidLast, minSlide, maxSoftSlide, currentSlid, newTicks, thePageBottom

on catchEvent me, xEvent
  case xEvent of
    #scrollUp:
      scrollUp(me)
    #scrollDown:
      scrollDown(me)
    otherwise:
      catchEvent(ScrollButtonGod, xEvent)
  end case
end

on turnON me
  turnON(ScrollButtonGod)
end

on turnOff me
  turnOff(ScrollButtonGod)
end

on softSlide me, xInt
  set tempTicks to the ticks
  if tempTicks > newTicks then
    set slideHere to nearJump(me, xInt)
    hardSlide(me, slideHere)
    set newTicks to tempTicks + 6
  end if
end

on hardSlide me, xInt
  set slideThere to bestValue(me, xInt)
  moveSlidThing(me, slideThere)
end

on crankDown me
  hardSlide(me, slidLast)
end

on crankUp me
  hardSlide(me, slidFirst)
end

on getMapInfo me
  return [slidFirst, slidLast]
end

on changeScrolledMember me, xMember
  crankUp(me)
  set the member of sprite slidSprite to xMember
  if initMapInfo(me) then
    linkUp(Slider, me)
    return 1
  else
    return 0
  end if
end

on new me, xSprite, xLineHeight, xPageHeight, xPageBottom
  set slidSprite to xSprite
  puppetSprite(slidSprite, 1)
  set minSlide to xLineHeight
  set maxSoftSlide to xPageHeight
  set thePageBottom to xPageBottom
  return me
end

on linkUp me, xScrollButtonGod, xSlider
  set ScrollButtonGod to xScrollButtonGod
  set Slider to xSlider
  return initMapInfo(me)
end

on scrollUp me
  scrollOne(me, slidFirst)
end

on scrollDown me
  scrollOne(me, slidLast)
end

on scrollOne me, xInt
  set tempTicks to the ticks
  if tempTicks > newTicks then
    set slideHere to tinyJump(me, xInt)
    hardSlide(me, slideHere)
    set newTicks to tempTicks + 6
  end if
end

on setMinSlide me, xInt
  set minSlide to xInt
end

on setMaxSlide me, xInt
  set maxSoftSlide to xInt
end

on updateSlider me
  moveSlidThing(me, currentSlid)
  turnOff(ScrollButtonGod)
end

on bestValue me, xInt
  set thisValue to xInt - slidFirst
  set thisOff to thisValue mod minSlide
  if thisOff <> 0 then
    set thisValue to thisValue - thisOff
  end if
  return thisValue + slidFirst
end

on nearJump me, xInt
  set slideHere to xInt
  if abs(currentSlid - slideHere) > maxSoftSlide then
    if slideHere < currentSlid then
      set slideHere to currentSlid - maxSoftSlide
    else
      set slideHere to currentSlid + maxSoftSlide
    end if
  end if
  return slideHere
end

on tinyJump me, xInt
  set slideHere to xInt
  if abs(currentSlid - slideHere) > minSlide then
    if slideHere < currentSlid then
      set slideHere to currentSlid - minSlide
    else
      set slideHere to currentSlid + minSlide
    end if
  end if
  return slideHere
end

on moveSlidThing me, xInt
  set currentSlid to xInt
  if currentSlid = slidFirst then
    catchEvent(ScrollButtonGod, #top)
  else
    if currentSlid = slidLast then
      catchEvent(ScrollButtonGod, #bottom)
    else
      catchEvent(ScrollButtonGod, #middle)
    end if
  end if
  set the locV of sprite slidSprite to currentSlid
  reDraw(Slider, xInt)
end

on initMapInfo me
  updateStage()
  set slidFirst to the locV of sprite slidSprite
  set currentSlid to slidFirst
  set spaceToBottom to the height of the member of sprite slidSprite - the locV of the regPoint of the member of sprite slidSprite
  set slidLast to thePageBottom - spaceToBottom - minSlide
  set slidLast to slidLast - ((slidLast - slidFirst) mod minSlide)
  return slidLast < slidFirst
end