Scroll an entire sentence (a list of AnimatingWord objects)

Not destroying the words as they hit the left of the window, also
need to hook the runloop up to the LetterSpool

ty.py

@@ -17,7 +17,7 @@ class LetterSpool(object):
     spooled = None
     parent = None
     font = None
-    clear_keys = (K_RETURN, K_SPACE,)
+    clear_keys = (K_SPACE,)
     color = (255, 255, 255,)
     parent_width = None
     parent_height = None
@@ -39,7 +39,7 @@ class LetterSpool(object):
             return
         if event.key == K_BACKSPACE:
             self.spooled = self.spooled[:-1]
-        else:
+        elif event.key != K_RETURN:
             self.spooled.append(event.unicode)
 
         buffer = ''.join(self.spooled)
@@ -50,27 +50,18 @@ class LetterSpool(object):
                 (offset_x, offset_y,))
 
 class AnimatingObject(object):
-    surface = None
-    parent = None
-    width, height = None, None
-    parent_width, parent_height = None, None
-
     def update(self):
         ''' Return True if the object is offscreen '''
         pass
 
 class AnimatingWord(AnimatingObject):
-    color = (255, 255, 255,)
-    word = None
-    font = None
-    step = 0.05
-    offset_x, offset_y = None, None
-
     def __init__(self, parent, word, **kwargs):
         self.__dict__.update(kwargs)
+        self.color = (255, 255, 255,)
         self.parent = parent
         self.parent_width, self.parent_height = parent.get_size()
         self.word = word
+        self.step = 0.05
         self.font = pygame.font.SysFont('Courier', 42)
 
         self.width, self.height = self.font.size(word)
@@ -81,6 +72,13 @@ class AnimatingWord(AnimatingObject):
     def is_offscreen(self):
         return False
 
+    def next_ready(self):
+        ''' Returns true if we're far enough left to start the next word '''
+        space_w, space_h = self.font.size(' ')
+        if self.width + self.offset_x + space_w <= self.parent_width:
+            return True
+        return False
+
     def update(self):
         ''' Update the word's position, returning True if it's offscreen '''
         self.parent.fill( (0, 0, 0),
@@ -137,13 +135,19 @@ class Typy(object):
             pygame.mixer.music.load('background.mid')
             pygame.mixer.music.play(-1, 0.0)
 
-        words = [AnimatingWord(self.surface, 'Hello')]
+        scrollwords = [AnimatingWord(self.surface, w) for w in words.words()]
+        last_word_index = 0
         while run:
             for event in pygame.event.get():
                 run = self.handle_event(event)
 
-            for w in words:
-                w.update()
+            for index, word in enumerate(scrollwords):
+                if index <= last_word_index:
+                    word.update()
+
+            if last_word_index <= (len(scrollwords) - 1):
+                if scrollwords[last_word_index].next_ready():
+                    last_word_index += 1
 
             pygame.display.update()
         if self.background_music: