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