button.py

import pygame.font

class Button:
    def __init__(self, ai_game, msg):
        ''' Initialize button attributes'''
        self.screen = ai_game.screen
        self.screen_rect = self.screen.get_rect()

        # set the dimensions and properties of the botton
        self.width, self.height = 200, 50
        self.button_color = (0, 255, 0)
        self.text_color = (255, 255, 255)
        self.font = pygame.font.SysFont(None, 48)

        # build the button's rect object and center it
        self.rect = pygame.Rect(0, 0, self.width, self.height)
        self.rect.center = self.screen_rect.center
        
        # prep the button message only once
        self._prep_msg(msg)
    
    def _prep_msg(self, msg):
        '''turn msg into a rendred image and center text on the button'''
        self.msg_image = self.font.render(msg, True, self.text_color, 
                                          self.button_color)
        self.msg_image_rect = self.msg_image.get_rect()
        self.msg_image_rect.center = self.rect.center
    
    def draw_button(self):
        # draw a blank button, and then draw a 
        self.screen.fill(self.button_color, self.rect)
        self.screen.blit(self.msg_image, self.msg_image_rect)