koperkapel/scenes/menu.py

   1 """ Main menu scene. """
   2
   3 from pgzero.constants import keys
   4 from ..actors.buttons import TextButton
   5 from ..actors.navigator import ActorNavigator
   6 from .base import Scene, ChangeSceneEvent, WorldEvent, QuitEvent
   7
   8
   9 class MenuScene(Scene):
  10     """ Main menu scene. """
  11
  12     def __init__(self):
  13         super().__init__()
  14         self._title = self.actors.add(TextButton("Main Menu"))
  15         self._title.pos = (300, 100)
  16         self._nav = ActorNavigator()
  17         self._menu = [
  18             TextButton("New Game", action=self.change_to_new_game),
  19             TextButton("Resume", action=self.change_to_resume),
  20             TextButton("Credits", action=self.change_to_credits),
  21             TextButton("Quit", action=self.quit),
  22         ]
  23         for i, item in enumerate(self._menu):
  24             item.pos = (300, 200 + (i * 100))
  25             self.actors.add(item)
  26         self._nav.connect(
  27             self._menu, [keys.DOWN, keys.RIGHT], [keys.UP, keys.LEFT],
  28             wrap=True)
  29         self._nav.current.select()
  30
  31     def change_to_resume(self):
  32         from .level import GameLevelScene
  33         return [ChangeSceneEvent(GameLevelScene())]
  34
  35     def change_to_new_game(self):
  36         from .level import GameLevelScene
  37         return [
  38             WorldEvent("reset"),
  39             ChangeSceneEvent(GameLevelScene())
  40         ]
  41
  42     def change_to_credits(self):
  43         from .credits import CreditsScene
  44         return [ChangeSceneEvent(CreditsScene())]
  45
  46     def quit(self):
  47         return [QuitEvent()]
  48
  49     def on_key_down(self, key, mod, unicode):
  50         if key == keys.RETURN:
  51             current = self._nav.current
  52             if current is not None:
  53                 return current.action()
  54         else:
  55             prev, current = self._nav.follow(key)
  56             if prev is not None:
  57                 prev.deselect()
  58             if current is not None:
  59                 current.select()