From 7d607520696bc378ea697f974944f6a90fdf5b36 Mon Sep 17 00:00:00 2001
From: "R. Tyler Ballance" <tyler@monkeypox.org>
Date: Sat, 13 Feb 2010 15:56:19 -0800
Subject: [PATCH] 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 | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/ty.py b/ty.py
index 6032cc4..8e4477c 100644
--- a/ty.py
+++ b/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: