-- stack: in.2
-- format: 8 (HyperCard 1)
-- flags: 0x0 (none)
-- protect password hash: 0
-- maximum user level: 5 (scripting)
-- window: Rect(x1=0, y1=0, x2=0, y2=0)
-- screen: Rect(x1=0, y1=0, x2=0, y2=0)
-- card dimensions: w=0 h=0
-- scroll: x=0 y=0
-- background count: 4
-- first background id: 19480
-- card count: 8
-- first card id: 36467
-- list block id: 2952
-- print block id: 17075
-- font table block id: 0
-- style table block id: 0
-- free block count: 0
-- free size: 0 bytes
-- total size: 41440 bytes
-- stack block size: 8192 bytes
-- created by hypercard version: 0x00000000
-- compacted by hypercard version: 0x00000000
-- modified by hypercard version: 0x00000000
-- opened by hypercard version: 0x00000000
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-- checksum: 0x0
----- HyperTalk script -----
on openStack
  Global operationMode,dateforUpdate
  global UpdateField,span1,span2,span3
  global upArrow,downArrow
  global maxDataPoints,minBaseValue
  global firstChart,saveLevel
  hide message box
  hide menubar
  put the userLevel into saveLevel
  set userLevel to 3
  put 16692 into upArrow
  put 3584 into downArrow
  put 5 into span1
  put 15 into span2
  put 40 into span3
  put 52 into maxDataPoints
  put 10000 into minBaseValue
  put 7 into firstChart -- number of first chart card
end openStack

on closeStack
  global saveLevel
  set userLevel to saveLevel
end closeStack

on clearScreen
  choose select tool
  doMenu select all
  doMenu clear picture
end clearScreen

function maxLine what,itemNr
put item itemNr of line 1 of what into result
repeat with i = 2 to the number of lines in what
  put max(result,item itemNr of line i of what) into result
end repeat
return result
end maxLine

function minLine what,itemNr
put item itemNr of line 1 of what into result
repeat with i = 2 to the number of lines in what
  put min(result,item itemNr of line i of what) into result
end repeat
return result
end minLine

function rounders sum,span
put round(100*(sum/span))/100 into result
return result
end rounders

on ScrolltoLastLine
  global operationMode,dateforUpdate,lineCount
  if operationMode="Update" then
    if dateforUpdate≠item 1 of line lineCount of field "data" then
      get line lineCount of field "data"
      put it&return&dateforUpdate into line lineCount of field "data"
      add 1 to lineCount
      get line lineCount of field "data"
      put it&"," into line lineCount of field "data"
      put lineCount-4 into scrolledLines
      if scrolledLines>0 then
        multiply scrolledLines by the textheight of field "Data"
        set the scroll of field "Data" to scrolledLines
      end if
    end if
  end if
end ScrolltoLastLine

on arrowDirection arrowNr
  put "bkgnd button "&quote&"Direction "&arrowNr&quote into direction
  get line arrowNr of field "Directions"
  if it>0 then
    set the icon of direction to it
    show direction
  else
    hide direction
  end if
end arrowDirection

on MovingAverage Avg,avgNr,span,itemNr
  global lineCount
  global upArrow,downArrow
  put 0 into avga
  put 0 into avgb
  put lineCount into itemCount
  put "Average "&avgNr into avgField
  if lineCount>=span then
    put rounders(Avg,span) into field avgField
  else
    put empty into field avgField
  end if
  if lineCount>=span+2 then
    if itemNr>0 then
      put item itemNr of line itemCount of field "data" into endValue1
      subtract 1 from itemCount
      put item itemNr of line itemCount of field "data" into endValue2
      subtract span-1 from itemCount
      put item itemNr of line itemCount of field "data" into pastValue1
      subtract 1 from itemCount
      put item itemNr of line itemCount of field "data" into pastValue2
    else
      put -itemNr into lowItem
      put lowItem-1 into highItem
      put item highItem of line itemCount of field "data" into endValue1
      subtract item lowItem of line itemCount of field "data" from endValue1
      subtract 1 from itemCount
      put item highItem of line itemCount of field "data" into endValue2
      subtract item lowItem of line itemCount of field "data" from endValue2
      subtract span-1 from itemCount
      put item highItem of line itemCount of field "data" into pastValue1
      subtract item lowItem of line itemCount of field "data" from pastValue1
      subtract 1 from itemCount
      put item highItem of line itemCount of field "data" into pastValue2
      subtract item lowItem of line itemCount of field "data" from pastValue2
    end if
    put Avg into Avga
    subtract endValue1 from Avga
    add pastValue1 to Avga
    put Avga into Avgb
    subtract endValue2 from Avgb
    add pastValue2 to Avgb
    put 0 into iconNr
    if Avg > Avga then
      if Avga>Avgb then
        put upArrow into iconNr
      end if
    else
      if Avg < Avga then
        if Avga < Avgb then
          put downArrow into iconNr
        end if
      end if
    end if
  else
    put 0 into iconNr
  end if
  put iconNr into line avgNr of field "Directions"
  arrowDirection avgNr
end MovingAverage

on ClearFields
  put empty into field "Date of Last Update"
  put empty into field "high"
  put empty into field "low"
  put empty into field "close"
  put empty into field "Average 1"
  put empty into field "Average 2"
  put empty into field "Average 3"
  put the number of lines of field "data" into lineCount
  repeat with i=1 to 3
    put 0 into line i of field "Directions"
    arrowDirection i
  end repeat
end ClearFields

on TrimDataPoints  -- Reduce data points to maxDataPoints
  global maxDataPoints,lineCount
  repeat while last line of field "data" is empty
    delete last line of field "data"
  end repeat
  repeat while number of lines of field "data" > maxDataPoints
    delete line 1 of field "data"
  end repeat
  put the number of lines of field "data" into lineCount
end TrimDataPoints

on SetforUpdate
  global operationMode,dateforUpdate,lineCount
  if operationMode="Update" then
    if dateforUpdate≠item 1 of line lineCount of field "data" then
      get line lineCount of field "data"
      put it&return&dateforUpdate into line lineCount of field "data"
      add 1 to lineCount
      get line lineCount of field "data"
      put it&"," into line lineCount of field "data"
      put lineCount-4 into scrolledLines
      if scrolledLines>0 then
        multiply scrolledLines by the textheight of field "Data"
        set the scroll of field "Data" to scrolledLines
      end if
    end if
  else
    put number of lines of field "data" into lineCount
    if lineCount>1 then
      scrolltoLastLine
    end if
  end if
end SetforUpdate

on QuickUpdate
  global dateforUpdate,lineCount,cardNr,updateFlag
  -- Assumes at card cardNr
  put "skip" into updateFlag
  put field "Stock Symbol" into StockSymbol
  put field "Stock Name" into StockName
  put the number of lines of field "data" into lineCount
  get line lineCount of field "data"
  if dateforUpdate≠item 1 of it then
    go card "Update All"
    set lockScreen to false
    put StockSymbol into field "Symbol"
    put StockName into field "Name"
    put item 1 of it into field "Last Week"
    delete item 1 of it
    put it into field "Last Week's Prices"
    put dateforUpdate into field "This Week"
    put empty into field "This Week's Prices"
    set lockScreen to true
  else
    add 1 to cardNr
  end if
end QuickUpdate