naja/scenes/menu.py

   1 """
   2 Main menu scene.
   3 """
   4
   5 import pygame.locals as pgl
   6
   7 from naja.constants import KEYS, PALETTE, KONAMI_CODE
   8 from naja.events import SceneChangeEvent, QuitGameEvent
   9 from naja.options import options
  10 from naja.scenes.scene import Scene
  11 from naja.scenes.credits import CreditsScene
  12 from naja.scenes.game import GameScene
  13 from naja.scenes.howto import HowtoScene
  14 from naja.scenes.load_save import LoadGameScene, SaveGameScene
  15 from naja.scenes.new_game import NewGameScene
  16 from naja.widgets.selector import SelectorWidget
  17 from naja.widgets.text import TextWidget
  18 from naja.widgets.image_box import ImageBox
  19 from naja.sound import sound
  20
  21
  22 class MenuScene(Scene):
  23     def __init__(self, state):
  24         super(MenuScene, self).__init__(state)
  25
  26         background = ImageBox(
  27             (0, 0), "screens/splash.png")
  28         self.add(background)
  29
  30         selector = SelectorWidget()
  31         self.add(selector)
  32         y_offset, y_diff = 270, 40
  33         x_offset = 400
  34
  35         y_offset += y_diff
  36         resume = TextWidget(
  37             (x_offset, y_offset), 'Resume Game', colour=PALETTE.WHITE,
  38             unselectable_colour=PALETTE.GREY, centre=True)
  39         resume.add_callback('click', self.scene_callback(GameScene))
  40         resume.set_selectable_callback(lambda: state is not None)
  41         selector.add(resume)
  42
  43         y_offset += y_diff
  44         new = TextWidget(
  45             (x_offset, y_offset), 'New Game', colour=PALETTE.WHITE,
  46             centre=True)
  47         new.add_callback('click', self.scene_callback(NewGameScene))
  48         selector.add(new)
  49
  50         y_offset += y_diff
  51         load = TextWidget((x_offset, y_offset), 'Load', colour=PALETTE.WHITE,
  52                           centre=True)
  53         load.add_callback('click', self.scene_callback(LoadGameScene))
  54         selector.add(load)
  55
  56         y_offset += y_diff
  57         save = TextWidget(
  58             (x_offset, y_offset), 'Save', colour=PALETTE.WHITE,
  59             unselectable_colour=PALETTE.GREY, centre=True)
  60         save.add_callback('click', self.scene_callback(SaveGameScene))
  61         save.set_selectable_callback(lambda: state is not None)
  62         selector.add(save)
  63
  64         y_offset += y_diff
  65         howto = TextWidget(
  66             (x_offset, y_offset), 'How To Play', colour=PALETTE.WHITE,
  67             centre=True)
  68         howto.add_callback('click', self.scene_callback(HowtoScene))
  69         selector.add(howto)
  70
  71         y_offset += y_diff
  72         credits = TextWidget(
  73             (x_offset, y_offset), 'Credits', colour=PALETTE.WHITE,
  74             centre=True)
  75         credits.add_callback('click', self.scene_callback(CreditsScene))
  76         selector.add(credits)
  77
  78         y_offset += y_diff
  79         quit = TextWidget((x_offset, y_offset), 'Quit', colour=PALETTE.WHITE,
  80                           centre=True)
  81         quit.add_callback('click', lambda event: QuitGameEvent.post())
  82         selector.add(quit)
  83
  84         self.konami = []
  85         if not sound.playing_music:
  86             sound.play_music('scape.ogg', 0.25)
  87
  88     def scene_callback(self, scene_class):
  89         return lambda event: SceneChangeEvent.post(scene_class)
  90
  91     def handle_event(self, ev):
  92         if ev.type == pgl.KEYDOWN and self.konami is not None:
  93             if ev.key in KEYS.KONAMI:
  94                 self.konami.append(ev.key)
  95                 if self.konami == KONAMI_CODE:
  96                     options['cheat_enabled'] = True
  97                     print "Cheats enabled."
  98                     print "  Try hitting some number keys."
  99                     self.konami = None
 100                 elif self.konami != KONAMI_CODE[:len(self.konami)]:
 101                     self.konami = None
 102         return super(MenuScene, self).handle_event(ev)
 103
 104     def handle_scene_event(self, ev):
 105         if ev.type == pgl.KEYDOWN:
 106             if ev.key in KEYS.QUIT:
 107                 QuitGameEvent.post()
 108                 return