Contents

ZGTSB-TextScroll

Added on 5/22/2001

Compatibilities:
behavior D8_5 Mac Shockwave

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This applies to the text or field sprite of the 'Ziggi Generic Text Scrolling Behaviours' set and brings text ability to scroll.

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-- ZIGGI GENERIC TEXT SCROLLING BEHAVIOURS --
-- (C) 2001 Zbigniew Szczesny

property pMeCount, pMeScroll, pMeLineH, pMeBottom, pMeMemberNum, pMeCastLibNum
property pMeType, pMouseLineNum, pMeSpriteNum, pMeLineCount

on getBehaviorDescription
  return "This applies to the text or field sprite of the 'Ziggi Generic Text Scrolling Behaviours' set and brings text ability to scroll."
end

on isOKtoAttach me, spriteType, spriteNum
  case spriteType of
    #graphic:
      meType = sprite(spriteNum).member.type
      return meType = #text or meType = #field
    #script:
      return FALSE
  end case
end

on beginSprite me
  pMeScroll = #Null
  pMeLastLine = 0
  pMeSpriteNum = me.spriteNum
  pMeMemberNum = sprite(pMeSpriteNum).memberNum
  pMeCastLibNum = sprite(pMeSpriteNum).castLibNum
  pMeType = member(pMeMemberNum, pMeCastLibNum).type
  if pMeType = #text then
    pMeLineH = linePosToLocV(member(pMeMemberNum, pMeCastLibNum), 1)
  else
    pMeLineH = member(pMeMemberNum, pMeCastLibNum).lineHeight
  end if
  pMeLineCount = member(pMeMemberNum, pMeCastLibNum).line.count
  pMeBottom = (pMeLineCount * pMeLineH) - member(pMeMemberNum, pMeCastLibNum).pageHeight
  member(pMeMemberNum, pMeCastLibNum).scrollTop = 0
end

on scrollUp me
  if pMeScroll = #Null then
    pMeScroll = #Up
    pMeCount = pMeLineH
  end if
end

on scrollDown me
  if pMeScroll = #Null then
    pMeScroll = #Downn
    pMeCount = pMeLineH
  end if
end

on scrollUpMore me
  member(pMeMemberNum, pMeCastLibNum).scrollByLine(-1)
end

on scrollDownMore me
  if member(pMeMemberNum, pMeCastLibNum).scrollTop < pMeBottom then member(pMeMemberNum, pMeCastLibNum).scrollByLine(1)
end

on prepareFrame me
  if pMeCount > 0 then
    if pMeScroll = #Up and member(pMeMemberNum, pMeCastLibNum).scrollTop > 0 then
      member(pMeMemberNum, pMeCastLibNum).scrollTop = member(pMeMemberNum, pMeCastLibNum).scrollTop - 1
    else if pMeScroll = #Downn and member(pMeMemberNum, pMeCastLibNum).scrollTop < pMeBottom then
      member(pMeMemberNum, pMeCastLibNum).scrollTop = member(pMeMemberNum, pMeCastLibNum).scrollTop + 1
    end if
    pMeCount = pMeCount - 1
  else
    pMeScroll = #Null
  end if
end

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