button.py

import pygame.font

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

		# Set the dimensions and properties of the button.
		self.width, self.height = 200, 50
		self.button_color = (105, 105, 105)
		self.text_color = (255, 255, 255)
		self.font = pygame.font.SysFont(None, 48)
		# 48 = size of text and None to use default font

		# 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

		# The button message needs to be prepped only once.
		self.prep_msg(msg)

	def prep_msg(self, msg):
		# Turn msg into a rendered 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 blank button and then draw message.
		self.screen.fill(self.button_color, self.rect)
		self.screen.blit(self.msg_image, self.msg_image_rect)