src/scenes/base_scene.py

@@ -3,3 +3,9 @@ import pygame
 class BaseScene:
     def __init__(self, screen: pygame.Surface):
         self.screen = screen
+
+    def update(self):
+        pass
+
+    def handle_event(self, events):
+        pass

src/scenes/main_menu_scene.py

@@ -4,6 +4,17 @@ from src.scenes.base_scene import BaseScene
 
 
 class MainMenuScene(BaseScene):
+    def __init__(self, screen):
+        super().__init__(screen)
+        self.button_status = False
 
     def update(self):
         pygame.draw.rect(self.screen, Color.white, [10,20,30,40])
+        if self.button_status:
+            pygame.draw.rect(self.screen, Color.white, [50,20,30,40])
+
+    def handle_event(self, event):
+        if event.type == pygame.KEYDOWN:
+            self.button_status = True
+        if event.type == pygame.KEYUP:
+            self.button_status = False

start.py

@@ -16,6 +16,9 @@ class Game:
         # 设置标题
         pygame.display.set_caption(GameConfig.game_name)
 
+        # 当前场景
+        self.scene = MainMenuScene(self.screen)
+
         # 运行循环
         self.running = True
         self.run()
@@ -23,16 +26,16 @@ class Game:
     def run(self):
         while self.running:
             # 事件处理
-            for event in pygame.event.get():
-                # 检查是否关闭
+            for event in pygame.event.get():  # 这里已经获取了事件，事件队列被清空，在场景的update中再次获取将没有事件
                 if event.type == pygame.QUIT:
                     self.running = False
+                self.scene.handle_event(event)  # 当前场景接收事件
 
             # 清屏
             self.screen.fill(GameConfig.bg_color)
 
             # 场景每帧更新逻辑运行
-            MainMenuScene(self.screen).update()
+            self.scene.update()
 
             # 更新显示
             pygame.display.update()