button.py

import pygame.font

class Button():
	"""Filled rectangle with a label."""
	
	def __init__(self, ai_settings, screen, msg):
		"""Initialize button attributes."""
		self.screen = screen
		self.screen_rect = screen.get_rect()
		
		# Set dimensions and properties of the button.
		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
		
		# 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 it 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 on it."""
		self.screen.fill(self.button_color, self.rect)
		self.screen.blit(self.msg_image, self.msg_image_rect)