naja/widgets/info_area.py

   1 """
   2 Widget for the game board information area.
   3 """
   4 import pygame
   5 import pygame.locals as pgl
   6
   7 from naja.constants import (INFO_SIZE, EIGHT_BIT_SCALE, MOVE, ACT, KEYS,
   8                             EXAMINE)
   9 from naja.events import finish_event
  10 from naja.resources import resources
  11 from naja.resources.mutators import EIGHT_BIT
  12
  13 from naja.widgets.base import Widget
  14 from naja.widgets.tile import BIT_MAP
  15 from naja.widgets.text import TextBoxWidget, TextWidget
  16
  17
  18 HINTS = {
  19         MOVE: "Move using the arrow keys.\nPress SPACE to stay in place\n"
  20               "Press TAB to change to Examine mode",
  21         ACT: "Choose an action using the Up/Down keys.\n"
  22              "Press Return to execute the action.",
  23         EXAMINE: "Select a card to examine using the arrow keys.\n"
  24                  "Press TAB to change to Move mode",
  25         }
  26
  27 TITLES = {
  28         MOVE: "Move the Robot",
  29         ACT: "Choose an Action",
  30         EXAMINE: "Select a Card",
  31         }
  32
  33
  34 class InfoAreaWidget(Widget):
  35     """
  36     Widget for the game board information area.
  37     """
  38     def __init__(self, pos, state):
  39         super(InfoAreaWidget, self).__init__(pos, INFO_SIZE)
  40         self.state = state
  41         self.set_position(state.player.position)
  42
  43     def prepare(self):
  44         if self.state.gameboard.player_mode in (ACT, MOVE):
  45             self.set_position(self.state.player.position)
  46         self.surface = pygame.surface.Surface(INFO_SIZE)
  47         self.surface.fill((0, 0, 0))
  48         # Extract actions and such from the card
  49         title = TextWidget((0, 0), TITLES[self.state.gameboard.player_mode],
  50                            colour=(255, 255, 255))
  51         title.render(self.surface)
  52         y_offset = title.surface.get_rect().height + 8
  53
  54         # TODO: Make this better.
  55         bits_text = ''.join('1' if bit in self.card.bitwise_operand else '0'
  56                             for bit in reversed(range(8)))
  57         card_bits = TextWidget((0, y_offset), bits_text, colour=(255, 255, 0))
  58         card_bits.render(self.surface)
  59         y_offset += card_bits.surface.get_rect().height + 8
  60
  61         for choice, action in enumerate(self.card.actions):
  62             y_offset = self.prepare_action(choice, action, y_offset)
  63         # We cheat horribly for layout reasons
  64         hint = TextBoxWidget((4, 0), HINTS[self.state.gameboard.player_mode],
  65                              padding=2,
  66                              box_width=(INFO_SIZE[0] - 4) // EIGHT_BIT_SCALE)
  67         hint.prepare()
  68         y_offset = INFO_SIZE[1] - hint.surface.get_rect().height
  69         self.surface.blit(hint.surface, (4, y_offset))
  70
  71     def prepare_action(self, choice, action, y_offset):
  72         if action.required_bits:
  73             img_name = BIT_MAP[action.required_bits].replace(
  74                 '.png', '_small.png')
  75             img = resources.get_image(img_name,
  76                                       transforms=(EIGHT_BIT,))
  77             self.surface.blit(img, (0, y_offset))
  78             y_offset += 8
  79         text = TextBoxWidget(
  80             (12, y_offset), action.get_text(),
  81             box_width=(INFO_SIZE[0] - 12) // EIGHT_BIT_SCALE,
  82             fontsize=28)
  83         text.render(self.surface)
  84
  85         # self.chosen may be None, in which case we don't draw the border.
  86         if choice == self.chosen:
  87             if not action.check_available(self.state.player):
  88                 colour = (255, 0, 0, 255)
  89             else:
  90                 colour = (255, 255, 0, 128)
  91             bottom = y_offset + text.surface.get_rect().height
  92             right = text.surface.get_rect().width + 12
  93             pygame.draw.lines(self.surface, colour, True,
  94                               [(12, y_offset), (right, y_offset),
  95                                (right, bottom), (12, bottom)], 4)
  96         return y_offset + text.surface.get_rect().height + 16
  97
  98     def set_position(self, position):
  99         self.card = self.state.board_locations[position]
 100         if self.state.gameboard.player_mode == ACT:
 101             if self.chosen is None:
 102                 self.chosen = 0
 103         else:
 104             self.chosen = None
 105
 106     def draw(self, surface):
 107         surface.blit(self.surface, self.pos)
 108
 109     def handle_event(self, ev):
 110         if self.state.gameboard.player_mode in (MOVE, EXAMINE):
 111             return super(InfoAreaWidget, self).handle_event(ev)
 112         if ev.type == pgl.KEYDOWN:
 113             if ev.key in KEYS.SELECT:
 114                 player = self.state.player
 115                 action = self.card.actions[self.chosen]
 116                 if not action.check_available(player):
 117                     print "BEEP!"
 118                 else:
 119                     action.perform_action(self.state.gameboard, self.card)
 120                     self.state.gameboard.replace_card(player.position)
 121                     self.state.gameboard.change_mode(MOVE)
 122                 return finish_event()
 123             if ev.key in KEYS.UP:
 124                 if self.chosen > 0:
 125                     self.chosen -= 1
 126                 return finish_event()
 127             if ev.key in KEYS.DOWN:
 128                 if self.chosen + 1 < len(self.card.actions):
 129                     self.chosen += 1
 130                 return finish_event()
 131         return super(InfoAreaWidget, self).handle_event(ev)