eight_puzzle.py

eight_puzzle.py

import ui
import speech


border_color = ('black')
moves = 0


def isAdjacent(row1, col1, row2, col2):
  if abs(row1-row2) + abs(col1-col2) == 1:
    return True 
  else:
    return False 


def move_piece(button, x, y):
  def animation():
    button.x = x
    button.y = y
  ui.animate(animation, duration=0.2)


def button_pressed(sender):
  global moves
  number = sender.title
  index = pieces.index(number)
  (row, col) = index2loc(index)
  empty_space_index = pieces.index('')
  (empty_space_row, empty_space_col) = index2loc(empty_space_index)
  if isAdjacent(row, col, empty_space_row, empty_space_col):
    move_piece(sender, empty_space_col*sender.width, empty_space_row*sender.width)
    moves += 1
    pieces[index] = ''
    pieces[empty_space_index] = number
    steps_label.text = 'Steps: ' + str(moves)
    if pieces == win_state:
      speech.say('you win', 'en-US', 0.3)
      

pieces = ['5', '1', '6', '3', '4', '8', '7', '', '2']
win_state = ['1', '2', '3', '4', '5', '6', '7', '8', '']


v = ui.View(background_color=('abcdef'))
board = ui.View()
v.add_subview(board)
v.present('full_screen')
steps_label = ui.Label()
steps_label.frame = (30, 30, 250, 100)
steps_label.background_color = (0.40, 0.80, 1.00)
steps_label.font = ('IowanOldStyle-BoldItalic', 46)
steps_label.text = 'Steps: ' + str(moves)
v.add_subview(steps_label)
board.frame = ((v.width-v.height), 0, v.height, v.height)
board.border_width = 2
board.border_color = border_color
board.background_color = (1,1,1)


# convert index of button to row number and column number
def index2loc(index):
  row = index / 3
  column = index % 3
  return (row, column)


for i in range(9):
  button_text = pieces[i]
  if button_text != '':
    button = ui.Button(title=button_text)
    button.background_color = (1,1,1)
    button.font = ('Futura-CondensedExtraBold', 200)
    button.width = v.height/3
    button.height = button.width
    button.border_color = border_color
    button.border_width = 1
    (r, c) = index2loc(i)
    button.x = button.width*c
    button.y = button.height*r
    button.action = button_pressed
    board.add_subview(button)