34 lines
1.8 KiB
Plaintext
34 lines
1.8 KiB
Plaintext
import pygame.font #导入pygame.font模块，它让pygame能够将文本渲染到屏幕上
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class Button():
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def __init__(self, ai_settings, screen, msg):
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"""初始化按钮的属性"""
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self.screen = screen
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self.screen_rect = screen.get_rect() #调用get_rect()方法，将表示屏幕的矩形存储在self.screen_rect中
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# 设置按钮的尺寸和其它属性
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self.width, self.height = 200, 50
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self.button_color = (0, 255, 0)
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self.text_color = (255, 255, 255)
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self.font = pygame.font.SysFont(None, 48) #调用font模块的SysFont类创建文字对象
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# 创建按钮的rect对象，并使其居中
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self.rect = pygame.Rect(0, 0, self.width, self.height) #调用Rect类创建rect对象
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self.rect.center = self.screen_rect.center #让按钮位于屏幕中央
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# 按钮的标签只需创建一次
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self.prep_msg(msg) #调用prep_msg()方法创建按钮标签
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def prep_msg(self, msg):
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"""将msg渲染为图形，并使其在按钮上居中"""
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self.msg_image = self.font.render(msg, True, self.text_color, self.button_color) #调用font.render()方法将存储在msg中的文本转换为图像
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self.msg_image_rect = self.msg_image.get_rect()
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self.msg_image_rect.center = self.rect.center #让按钮标签位于按钮中央
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def draw_button(self):
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# 绘制一个用颜色填充的按钮，再绘制文本
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self.screen.fill(self.button_color, self.rect) #调用fill()方法填充按钮
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self.screen.blit(self.msg_image, self.msg_image_rect) #调用blit()方法将文字对象添加到窗口上
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