X-Git-Url: https://git.ctpug.org.za/?a=blobdiff_plain;f=tabakrolletjie%2Fengine.py;h=4aac2e8e8bb7297ce86e317e4c8e68e5528f5212;hb=c1a180350f935b770c9496a11c3a2da17859587b;hp=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hpb=f3600c28cd6e96abe7c0916860b0cc56b444545f;p=tabakrolletjie.git

diff --git a/tabakrolletjie/engine.py b/tabakrolletjie/engine.py
index e69de29..4aac2e8 100644
--- a/tabakrolletjie/engine.py
+++ b/tabakrolletjie/engine.py
@@ -0,0 +1,43 @@
+""" Engine for moving controll scenes and tranistions between them.
+"""
+
+import pygame.display
+import pygame.event
+import pygame.time
+
+import pygame.locals as pgl
+
+from .constants import FPS
+from .events import QuitEvent, SceneChangeEvent
+
+
+class Engine(object):
+    def __init__(self, screen, gamestate):
+        self._screen = screen
+        self._gamestate = gamestate
+        self._scene = None
+
+    def set_scene(self, scene):
+        if self._scene is not None:
+            self._scene.exit(self._gamestate)
+        self._scene = scene
+        if scene is not None:
+            self._scene.enter(self._gamestate)
+
+    def run(self):
+        clock = pygame.time.Clock()
+
+        while True:
+            events = pygame.event.get()
+            for ev in events:
+                if QuitEvent.matches(ev) or ev.type == pgl.QUIT:
+                    self.set_scene(None)
+                    return
+                elif SceneChangeEvent.matches(ev):
+                    self.set_scene(ev.scene)
+                else:
+                    self._scene.event(ev, self._gamestate)
+
+            self._scene.render(self._screen, self._gamestate)
+            pygame.display.flip()
+            clock.tick(FPS)