Commit before breaking everything

[matches/honours.git] / research / transmission_spectroscopy / simulator / pgu-0.18 / examples / engine1.py

diff --git a/research/transmission_spectroscopy/simulator/pgu-0.18/examples/engine1.py b/research/transmission_spectroscopy/simulator/pgu-0.18/examples/engine1.py
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+"""<title>an example of engine usage</title>"""
+
+import pygame
+from pygame.locals import *
+
+# the following line is not needed if pgu is installed
+import sys; sys.path.insert(0, "..")
+
+from pgu import engine
+
+pygame.font.init()
+
+screen = pygame.display.set_mode((320,240),SWSURFACE)
+
+class Red(engine.State):
+    def paint(self,s): 
+        s.fill((255,0,0))
+        pygame.display.flip()
+    def event(self,e): 
+        if e.type is KEYDOWN: return Green(self.game)
+        
+class Green(engine.State):
+    def paint(self,s): 
+        s.fill((0,255,0))
+        pygame.display.flip()
+    def event(self,e): 
+        if e.type is KEYDOWN: return Blue(self.game)
+
+##A state may subclass engine.State.
+##::
+class Blue(engine.State):
+    ##
+    ##The init method should load data, etc.  The __init__ method
+    ##should do nothing but record the parameters.  If the init method
+    ##returns a value, it becomes the new state.
+    ##::
+    def init(self):
+        self.image = pygame.image.load("cuzco.png")
+        self.pos = 0,0
+        self._pos = self.pos
+    ##
+    ##The paint method is called once.  If you call repaint(), it
+    ##will be called again.
+    ##::
+    def paint(self,s): 
+        s.fill((0,0,255))
+        s.blit(self.image,self.pos)
+        pygame.display.flip()
+    ##
+    ##Every time an event occurs, event is called.  If the event method
+    ##returns a value, it will become the new state.
+    ##::
+    def event(self,e): 
+        if e.type is KEYDOWN: return Red(self.game)
+    ##
+    ##Loop is called once a frame.  It should contain all the
+    ##logic.  If the loop method returns a value it will become the
+    ##new state.
+    ##::
+    def loop(self):
+        self._pos = self.pos
+        self.pos = self.pos[0]+1,self.pos[1]+1
+    ##
+    ##Update is called once a frame.  It should update the display.
+    ##::
+    def update(self,screen):
+        screen.fill((0,0,255),pygame.Rect(self._pos[0],self._pos[1],self.image.get_width(),self.image.get_height()))
+        screen.blit(self.image,self.pos)
+        pygame.display.flip() #better to do updates
+    ##
+        
+game = engine.Game()
+game.run(Red(game),screen)