Index

1. Touchmap-0.2 using object orientation

• Sandpit/touchmap-0.2/touchmap.py

  class button:
      def __init__ (self, x, y, size):
          self._x = x
          self._y = y
          self._size = size
          self._tile = touchgui.image_tile (blank_list ("wallv", size),
                                            x, y,
                                            size, size, cellback)
      def to_blank (self):
          self._tile.set_images (blank_list ("wallv", cell_size))
      def to_wall (self):
          self._tile.set_images (wall_list ("v", cell_size))
      def to_spawn (self):
          self._tile = touchgui.text_tile (dark_grey, light_grey, white, mid_grey,
                                           ’s’, self._size,
                                           self._x, self._y,
                                           self._size, self._size,
                                           worldspawn, "worldspawn")
      def get_tile (self):
          return self._tile

• 
  Sandpit/touchmap-0.2/touchmap.py

  blank_t, wall_t, door_t, spawn_t = range (4)  # enumerated types
  next_tile = wall_t
  
  
  function_create = {blank_t:create_blank,
                     wall_t:create_wall,
                     door_t:create_door,
                     spawn_t:create_spawn}

• note the next_tile is now a variable which contains an enumerated value
  • denoting the cell type to be created on the grid
• notice the dictionary of enumerated values associated with functions
• 
  Sandpit/touchmap-0.2/touchmap.py

  def cellback (param, tap):
      global clicked, cell_array, button_array, double_tapped_cell
      clicked = True
      mouse = pygame.mouse.get_pos ()
      x, y = get_cell (mouse)
      old = cell_array.get (x + xoffset, y + yoffset)
      button = button_array.get (x + xoffset, y + yoffset)
      if old == " ":
          # blank -> next_tile
          function_create[next_tile] (button)
          cell_array.set_contents (x + xoffset, y + yoffset, "v")
      elif old == "v":
          # wall -> door
          button.to_door ()
          cell_array.set_contents (x + xoffset, y + yoffset, "|")
      elif old == "|":
          # door -> blank
          button.to_blank ()
          cell_array.set_contents (x + xoffset, y + yoffset, " ")

• 
  Sandpit/touchmap-0.2/touchmap.py

  def create_blank (button):
      button.to_blank ()
  
  def create_wall (button):
      button.to_wall ()
  
  def create_door (button):
      button.to_door ()
  
  
  def create_spawn (button):
      global next_tile
      button.to_spawn ()
      next_tile = wall_t

2. Hints on how to implement the header for the output map

• we need a mechanism to allow the program to remember which assets have been used
• then just prior to writing the file the program needs to iterate over the list and emit the appropriate header info

Index

This document was produced using groff-1.22.