更新 'alien_invasion.py'

alien_invasion.py

@@ -5,6 +5,7 @@ import pygame
 
 from settings import Settings
 from game_stats import GameStats
+from button import Button
 from ship import Ship
 from bullet import Bullet
 from alien import Alien
@@ -31,6 +32,9 @@ class AlienInvasion:
 
         self._create_fleet()
 
+        # 创建Play按钮
+        self.play_button = Button(self,"Play")
+
         # 设置背景色
         self.bg_color = (230, 230, 230)
 
@@ -123,6 +127,28 @@ class AlienInvasion:
                 self._check_keydown_events(event)
             elif event.type == pygame.KEYUP:
                 self._check_keyup_events(event)
+            elif event.type == pygame.MOUSEBUTTONDOWN:
+                mouse_pos = pygame.mouse.get_pos()
+                self._check_play_button(mouse_pos)
+
+    def _check_play_button(self,mouse_pos):
+        """在玩家单机Play按钮时开始新游戏"""
+        button_clicked = self.play_button.rect.collidepoint(mouse_pos)
+        if button_clicked and not self.stats.game_active:
+            # 重置游戏统计信息
+            self.stats.reset_stats()
+            self.stats.game_active = True
+
+            # 清空余下的外星人和子弹
+            self.aliens.empty()
+            self.bullets.empty()
+
+            # 创建一群新的外星人并让飞船居中
+            self._create_fleet()
+            self.ship.center_ship()
+
+            # 隐藏鼠标光标
+            pygame.mouse.set_visible(False)
 
     def _check_keydown_events(self, event):
         """响应按键"""
@@ -156,6 +182,10 @@ class AlienInvasion:
             bullet.draw_bullet()
         self.aliens.draw(self.screen)
 
+        # 如果游戏处于非活动状态，就绘制Play按钮
+        if not self.stats.game_active:
+            self.play_button.draw_button()
+
         pygame.display.flip()
 
     def _check_fleet_edges(self):
@@ -189,6 +219,7 @@ class AlienInvasion:
             sleep(0.5)
         else:
             self.stats.game_active = False
+            pygame.mouse.set_visible(True)
 
     def _check_aliens_bottom(self):
         """检查是否有外星人到达了屏幕底端"""