-- background: 2783 from stack: in
-- bmap block id: 2216
-- flags: 0000
-- background id: 0
-- name: 
----- HyperTalk script -----
-- Copyright © 1988 Cincinnati Country Day School.  All rights reserved.

-- For information, contact Joseph F. Hofmeister, Computer Coordinator
-- The HyperSchool, Cincinnati Country Day School
-- 6905 Given Road, Cincinnati, Ohio 45243
-- Telephone 513-561-7298  AppleLink K0197

on openStack
  if the version < 1.2 then
    answer "This stack needs HyperCard version 1.2."
    set lockMessages to true
    domenu home
  else
    hide message
    reset paint
    initTower
    setTower 2
  end if
end openStack

on closeStack
  reset paint
end closeStack

on initTower
  global maxDisks, nDisks, yBase, dHeight, xPole, poleTop
  put 7 into maxDisks
  put the number of bkgnd buttons - 7 into nDisks
  put 250 into yBase
  put 20 into dHeight
  put "0,0,0" into xPole
  get round( width of card window / 2 )
  put it - 150 into item 1 of xPole
  put it into item 2 of xPole
  put it + 150 into item 3 of xPole
  put yBase - round( 7.5 * dHeight ) - 4 into poleTop
end initTower

on makeBase
  global yBase, dHeight, xPole, poleTop
  set the editBkgnd to true
  choose select tool
  drag from 0,0 to width of card window, height of card window
  doMenu "Clear Picture"
  choose round rect tool
  set the filled to true
  set the pattern to 22
  put poleTop + 4 + round( dHeight / 2 ) into t
  put yBase + dHeight into b
  repeat with i = 1 to 3
    get item i of xPole
    drag from it - 5, t to it + 5, b
  end repeat
  set the pattern to 20
  get yBase + round( dHeight / 2 )
  drag from item 1 of xPole - 90, it to item 3 of xPole + 90, it + round( 1.5 * dHeight )
  reset paint
  choose browse tool
end makeBase

on deleteTower
  global nDisks
  choose button tool
  set the editBkgnd to true
  repeat with i = the number of bkgnd buttons down to 8
    if the name of bkgnd button i contains "Disk" then
      click at the loc of bkgnd button i
      doMenu "Clear Button"
    end if
  end repeat
  choose browse tool
  put 0 into nDisks
end deleteTower

on makeTower height, dest
  global nDisks, yBase, dHeight, xPole
  global firstPole, stackHeight
  deleteTower
  set the editBkgnd to true
  put height into nDisks
  put dest into firstPole
  put "0,0,0" into stackHeight
  put nDisks into item firstPole of stackHeight
  put item firstPole of xPole into thisPole
  put yBase - dHeight * ( nDisks - 1 ) into yDisk
  put 60 into dWidth
  repeat with i = 1 to nDisks
    doMenu "New Button"
    get "Disk" && i
    set the name of bkgnd button "New Button" to it
    set the width of bkgnd button it to dWidth
    set the height of bkgnd button it to dHeight
    set the loc of bkgnd button it to thisPole, yDisk
    add 10 to dWidth
    add dHeight to yDisk
  end repeat
  choose browse tool
  put 0 into field depth
  put 0 into field moves
end makeTower

on setTower dest
  global nDisks, yBase, dHeight, xPole
  global firstPole, stackHeight
  put dest into firstPole
  put "0,0,0" into stackHeight
  put nDisks into item firstPole of stackHeight
  put item firstPole of xPole into thisPole
  put yBase - dHeight * ( nDisks - 1 ) into yDisk
  repeat with i = 1 to nDisks
    get "Disk" && i
    set the loc of bkgnd button it to thisPole, yDisk
    add dHeight to yDisk
  end repeat
  put 0 into field depth
  put 0 into field moves
end setTower

on shiftTower dest
  global nDisks, firstPole
  put 0 into field depth
  put 0 into field moves
  choose button tool
  moveTower nDisks, firstPole, dest, 6 - firstPole - dest
  put dest into firstPole
  choose browse tool
end shiftTower



-- part 7 (button)
-- low flags: 00
-- high flags: A004
-- rect: left=151 top=61 right=83 bottom=239
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Set Tower
----- HyperTalk script -----
on mouseUp
  answer "Disks on which pole?" with "Left" or "Center" or "Right"
  if it = "Right" then
    setTower 3
  else
    if it = "Center" then
      setTower 2
    else
      setTower 1
    end if
  end if
end mouseUp



-- part 8 (button)
-- low flags: 00
-- high flags: A004
-- rect: left=243 top=61 right=83 bottom=331
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Move Tower
----- HyperTalk script -----
on mouseUp
  answer "Move to which pole?" with "Left" or "Center" or "Right"
  if it = "Right" then
    shiftTower 3
  else
    if it = "Center" then
      shiftTower 2
    else
      shiftTower 1
    end if
  end if
end mouseUp



-- part 9 (button)
-- low flags: 00
-- high flags: A004
-- rect: left=105 top=24 right=57 bottom=407
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 3
-- text size: 18
-- style flags: 2048
-- line height: 24
-- part name: Tower of Hanoi
----- HyperTalk script -----
on mouseUp
  if the visible of card field Help is true then
    set the visible of card field "Help" to false
  else
    set the visible of card field Author to true
    set the visible of card button OK to true
  end if
end mouseUp

-- Answers to the questions posed in the "Help" field:
-- If n is the number of disks in the stack, the maximum depth of
-- recursion is n, and the total number of moves is 2^n - 1.
-- By the way, this means that the Tibetan monks have their work cut
-- out for them with a stack of 100 disks.  Even if they were using
-- a Cray supercomputer, and could make one move per nanosecond,
-- completion of the task would still take about 3000 times the
-- present age of the universe.


-- part 18 (button)
-- low flags: 00
-- high flags: 0001
-- rect: left=126 top=315 right=339 bottom=161
-- title width / last selected line: 0
-- icon id / first selected line: 25002 / 25002
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Help
----- HyperTalk script -----
on mouseUp
  set the visible of card field Help to not visible of card field Help
end mouseUp



-- part 49 (field)
-- low flags: 01
-- high flags: 0001
-- rect: left=114 top=296 right=311 bottom=229
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 65535
-- font id: 2
-- text size: 10
-- style flags: 0
-- line height: 13
-- part name: depthLabel


-- part 50 (field)
-- low flags: 01
-- high flags: 0002
-- rect: left=229 top=296 right=311 bottom=254
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 2
-- text size: 10
-- style flags: 0
-- line height: 13
-- part name: depth


-- part 52 (field)
-- low flags: 01
-- high flags: 0002
-- rect: left=258 top=296 right=311 bottom=283
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 2
-- text size: 10
-- style flags: 0
-- line height: 13
-- part name: moves


-- part 53 (field)
-- low flags: 01
-- high flags: 0001
-- rect: left=283 top=296 right=311 bottom=398
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 2
-- text size: 10
-- style flags: 0
-- line height: 13
-- part name: moveLabel


-- part 60 (button)
-- low flags: 00
-- high flags: A004
-- rect: left=59 top=61 right=83 bottom=147
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Make Tower
----- HyperTalk script -----
on mouseUp
  global maxDisks
  get -1
  repeat while it < 0 or it > maxDisks
    ask "How many disks (0 -" && maxDisks & ")?"
    if it is empty then exit mouseUp
    get round( it )
  end repeat
  makeTower it, 1
end mouseUp



-- part 61 (button)
-- low flags: 00
-- high flags: A004
-- rect: left=335 top=61 right=83 bottom=453
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: See Algorithm
----- HyperTalk script -----
on mouseUp
  edit script of this stack
end mouseUp



-- part 85 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=226 top=200 right=220 bottom=286
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Disk 1


-- part 95 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=221 top=220 right=240 bottom=291
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Disk 2


-- part 96 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=216 top=240 right=260 bottom=296
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Disk 3


-- part 97 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=61 top=240 right=260 bottom=151
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Disk 4