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, 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 from naja.sound import sound
  13
  14 from naja.widgets.base import Widget
  15 from naja.widgets.tile import BIT_MAP
  16 from naja.widgets.text import TextBoxWidget, TextWidget
  17
  18
  19 HINTS = {
  20     ACT: ("Choose an action using the Up/Down keys.\n"
  21           "Press Return to execute the action."),
  22     EXAMINE: "Select a card to examine using the arrow keys.",
  23 }
  24
  25 HINT_LEGAL_MOVE = "\nPress Return to move to this card."
  26
  27 TITLES = {
  28     ACT: "Choose an Action",
  29     EXAMINE: "Select a Card",
  30 }
  31
  32
  33 class InfoAreaWidget(Widget):
  34     """
  35     Widget for the game board information area.
  36     """
  37     def __init__(self, pos, state):
  38         super(InfoAreaWidget, self).__init__(pos, INFO_SIZE)
  39         self.state = state
  40         self.chosen = None
  41         self.card_position = state.player.position
  42         self.set_position(state.player.position)
  43
  44     def prepare(self):
  45         if self.state.gameboard.player_mode == ACT:
  46             self.set_position(self.state.player.position)
  47         self.surface = pygame.surface.Surface(INFO_SIZE)
  48         self.surface.fill((0, 0, 0))
  49         # Extract actions and such from the card
  50         title = TextWidget((0, 0), TITLES[self.state.gameboard.player_mode],
  51                            colour=(255, 255, 255))
  52         title.render(self.surface)
  53         y_offset = title.surface.get_rect().height + 8
  54
  55         # TODO: Make this better.
  56         bits_text = ''.join('1' if bit in self.card.bitwise_operand else '0'
  57                             for bit in reversed(range(8)))
  58         card_bits = TextWidget((0, y_offset), bits_text, colour=(255, 255, 0))
  59         card_bits.render(self.surface)
  60         y_offset += card_bits.surface.get_rect().height + 8
  61
  62         for choice, action in enumerate(self.card.actions):
  63             y_offset = self.prepare_action(choice, action, y_offset)
  64         # We cheat horribly for layout reasons
  65         hint_text = HINTS[self.state.gameboard.player_mode]
  66         if self.state.gameboard.player_mode == EXAMINE:
  67             if self.card_position in self.state.player.legal_moves():
  68                 hint_text += HINT_LEGAL_MOVE
  69
  70         hint = TextBoxWidget((4, 0), hint_text, padding=2,
  71                              box_width=(INFO_SIZE[0] - 4) // EIGHT_BIT_SCALE)
  72         hint.prepare()
  73         y_offset = INFO_SIZE[1] - hint.surface.get_rect().height
  74         self.surface.blit(hint.surface, (4, y_offset))
  75
  76     def prepare_action(self, choice, action, y_offset):
  77         text = TextBoxWidget(
  78             (18, y_offset), action.get_text(),
  79             box_width=(INFO_SIZE[0] - 16) // EIGHT_BIT_SCALE,
  80             fontsize=28)
  81         text.render(self.surface)
  82         # self.chosen may be None, in which case we don't draw the border.
  83         if choice == self.chosen:
  84             if not action.check_available(self.state.player):
  85                 colour = (255, 0, 0, 255)
  86             else:
  87                 colour = (255, 255, 0, 128)
  88             bottom = y_offset + text.surface.get_rect().height
  89             right = text.surface.get_rect().width + 12
  90             pygame.draw.lines(self.surface, colour, True,
  91                               [(18, y_offset), (right, y_offset),
  92                                (right, bottom), (18, bottom)], 4)
  93         if action.required_bits:
  94             img_name = BIT_MAP[action.required_bits].replace(
  95                 '.png', '_small.png')
  96             img = resources.get_image(img_name,
  97                                       transforms=(EIGHT_BIT,))
  98             self.surface.blit(img, (0, y_offset))
  99         return y_offset + text.surface.get_rect().height + 16
 100
 101     def set_position(self, position):
 102         self.card_position = position
 103         self.card = self.state.board_locations[self.card_position]
 104         if self.state.gameboard.player_mode == ACT:
 105             if self.chosen is None:
 106                 self.chosen = 0
 107         else:
 108             self.chosen = None
 109
 110     def draw(self, surface):
 111         surface.blit(self.surface, self.pos)
 112
 113     def next_viable_action(self, step=1):
 114         num_actions = len(self.card.actions)
 115         if num_actions == 0:
 116             return
 117         player = self.state.player
 118         chosen = self.chosen
 119         for i in range(num_actions - 1):
 120             # loop through each action at most once.
 121             chosen = (chosen + step) % num_actions
 122             action = self.card.actions[chosen]
 123             if action.check_available(player):
 124                 sound.play_sound('change_action.ogg', volume=0.05)
 125                 self.chosen = chosen
 126
 127     def prev_viable_action(self):
 128         return self.next_viable_action(step=-1)
 129
 130     def try_perform_action(self):
 131         player = self.state.player
 132         action = self.card.actions[self.chosen]
 133         if not action.check_available(player):
 134             sound.play_sound('error.ogg')
 135         else:
 136             action.perform_action(self.state.gameboard, self.card)
 137             self.state.gameboard.replace_card(player.position)
 138             self.state.gameboard.change_mode(EXAMINE)
 139             self.set_position(player.position)
 140
 141     def handle_event(self, ev):
 142         if self.state.gameboard.player_mode == EXAMINE:
 143             return super(InfoAreaWidget, self).handle_event(ev)
 144         if ev.type == pgl.KEYDOWN:
 145             if ev.key in KEYS.SELECT:
 146                 self.try_perform_action()
 147                 return finish_event()
 148             if ev.key in KEYS.UP:
 149                 self.next_viable_action()
 150                 return finish_event()
 151             if ev.key in KEYS.DOWN:
 152                 self.prev_viable_action()
 153                 return finish_event()
 154             if ev.key in KEYS.SWITCH:
 155                 self.next_viable_action()
 156                 return finish_event()
 157         return super(InfoAreaWidget, self).handle_event(ev)