--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gamelib/engine.py	Sun Aug 30 15:11:44 2009 +0000
@@ -0,0 +1,53 @@
+"""Game engine and states."""
+
+from pgu.engine import Game, State, Quit
+import pygame
+from pygame.locals import USEREVENT, QUIT, KEYDOWN, K_ESCAPE
+
+class Engine(Game):
+    def __init__(self, main_menu_app):
+        self.main_menu_app = main_menu_app
+        self.clock = pygame.time.Clock()
+
+    def tick(self):
+        """Tic toc."""
+        pygame.time.wait(10)
+
+class MainMenuState(State):
+    def event(self, e):
+        if events_equal(e, START_DAY):
+            return DayState(self.game)
+        elif e.type is KEYDOWN and e.key == K_ESCAPE:
+            return Quit(self.game)
+        elif e.type is not QUIT:
+            self.game.main_menu_app.event(e)
+
+    def paint(self, screen):
+        screen.fill((0,0,0))
+        self.game.main_menu_app.paint(screen)
+        pygame.display.flip()
+
+class DayState(State):
+    def event(self, e):
+        if events_equal(e, START_NIGHT):
+            return NightState(self.game)
+        elif e.type is KEYDOWN and e.key == K_ESCAPE:
+            return MainMenuState(self.game)
+        elif events_equal(e, GO_MAIN_MENU):
+            return MainMenuState(self.game)
+
+class NightState(State):
+    def event(self, e):
+        if events_equal(e, START_DAY):
+            return DayState(self.game)
+
+# pygame events
+
+def events_equal(e1, e2):
+    """Compare two user events."""
+    return (e1.type is e2.type and e1.name == e2.name)
+
+START_DAY = pygame.event.Event(USEREVENT, name="START_DAY")
+START_NIGHT = pygame.event.Event(USEREVENT, name="START_NIGHT")
+GO_MAIN_MENU = pygame.event.Event(USEREVENT, name="GO_MAIN_MENU")
+QUIT = pygame.event.Event(QUIT)