added "smooth" movement

added function {start,stop}_move and separate detection of key press and
release

pyshoot.py

@@ -55,7 +55,6 @@ class Object(pygame.sprite.Sprite):
 	def move(self, dx, dy):
 		""" move the object by adding deltas passed """
 		self.speed = (dx, dy)
-		globals.moving_objects.add(self)
 
 	def update(self):
 		self.rect.move_ip(self.speed)
@@ -94,6 +93,20 @@ class Player(Object):
 		bullet = globals.bulletfactory.create(0, self.rect.midright)
 		globals.bullets_list.add(bullet)
 
+	def start_move(self, vector):
+		""" initiate moving sequence """
+		globals.moving_objects.add(self)
+		self.speed = (self.speed[0] + vector[0], self.speed[1] + vector[1])
+		if not globals.moving_objects.has(self):
+			print "error should contain self after start_move"
+	
+	def stop_move(self):
+		""" stop moving sequence """
+		globals.moving_objects.remove(self)
+		self.speed = (0, 0)
+		if globals.moving_objects.has(self):
+			print "error should NOT contain self after stop_move"
+
 def init_gfx():
 	"""graphics initialisation"""
 	
@@ -135,21 +148,31 @@ def wait_keypress():
 
 def process_key(event, player):
 	""" process keyboard input """
-	if event.key == K_ESCAPE:
-		globals.die = True
-	elif event.key == K_n:
-		player.move(0, 10)
-		pass
-	elif event.key == K_UP:
-		player.move(0, -10)
-	elif event.key == K_DOWN:
-		player.move(0, 10)
-	elif event.key == K_LEFT:
-		player.move(-10, 0)
-	elif event.key == K_RIGHT:
-		player.move(10, 0)
-	elif event.key == K_x:
-		player.shoot()
+	if event.type == KEYDOWN:
+		if event.key == K_ESCAPE:
+			globals.die = True
+		elif event.key == K_UP:
+			player.start_move((0, -1))
+		elif event.key == K_DOWN:
+			player.start_move((0, 1))
+		elif event.key == K_LEFT:
+			player.start_move((-1, 0))
+		elif event.key == K_RIGHT:
+			player.start_move((1, 0))
+		elif event.key == K_x:
+			player.start_shoot()
+	if event.type == KEYUP:
+		if event.key == K_UP:
+			player.stop_move()
+		elif event.key == K_DOWN:
+			player.stop_move()
+		elif event.key == K_LEFT:
+			player.stop_move()
+		elif event.key == K_RIGHT:
+			player.stop_move()
+		elif event.key == K_x:
+			player.stop_shoot()
+
 
 ##
 # Main
@@ -179,12 +202,9 @@ while not globals.die:
 	# draw player
 	#globals.screen.blit(player.image, player.pos)
 	
-	#globals.moving_objects.clear(globals.screen, globals.background)
-	#globals.bullets_list.clear(globals.screen, globals.background)
+	globals.moving_objects.clear(globals.screen, globals.background)
+	globals.bullets_list.clear(globals.screen, globals.background)
 
-	for event in pygame.event.get():
-                if event.type == KEYDOWN:
-			process_key(event, player)
 
 	# erase moving objects
 	globals.moving_objects.update()
@@ -200,12 +220,13 @@ while not globals.die:
 	nbframe = nbframe + 1
 
 	globals.clock.tick(60)
-	globals.moving_objects.clear(globals.screen, globals.background)
-	globals.bullets_list.clear(globals.screen, globals.background)
 
+	for event in pygame.event.get():
+                if event.type == KEYDOWN or event.type == KEYUP:
+			process_key(event, player)
 
 	# reinitializing moving objects list
-	globals.moving_objects = pygame.sprite.RenderUpdates()
+	#globals.moving_objects = pygame.sprite.RenderUpdates()
 
 print "frames : %d" % nbframe