03_views.py差异

03_views.py

--- /pb1/repo/arcade/doc/tutorials/views/02_views.py
+++ /pb1/repo/arcade/doc/tutorials/views/03_views.py
@@ -9,6 +9,32 @@
 SCREEN_WIDTH = 800
 SCREEN_HEIGHT = 600
 SCREEN_TITLE = "Implement Views Example"
+
+
+class InstructionView(arcade.View):
+    """ View to show instructions """
+
+    def on_show_view(self):
+        """ This is run once when we switch to this view """
+        self.window.background_color = arcade.csscolor.DARK_SLATE_BLUE
+
+        # Reset the viewport, necessary if we have a scrolling game and we need
+        # to reset the viewport back to the start so we can see what we draw.
+        self.window.default_camera.use()
+
+    def on_draw(self):
+        """ Draw this view """
+        self.clear()
+        arcade.draw_text("Instructions Screen", self.window.width / 2, self.window.height / 2,
+                         arcade.color.WHITE, font_size=50, anchor_x="center")
+        arcade.draw_text("Click to advance", self.window.width / 2, self.window.height / 2-75,
+                         arcade.color.WHITE, font_size=20, anchor_x="center")
+
+    def on_mouse_press(self, _x, _y, _button, _modifiers):
+        """ If the user presses the mouse button, start the game. """
+        game_view = GameView()
+        game_view.setup()
+        self.window.show_view(game_view)
 
 
 class GameView(arcade.View):
@@ -102,9 +128,8 @@
     """ Main function """
 
     window = arcade.Window(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
-    start_view = GameView()
+    start_view = InstructionView()
     window.show_view(start_view)
-    start_view.setup()
     arcade.run()