"""Overall class to manage game assets and behavior."""

def __init__(self):

"""Initialize the game, and create game resources."""

pygame.init()

self.settings = Settings()

# Set the window size and title bar text

# Windowed

self.screen = pygame.display.set_mode(

(self.settings.screen_width, self.settings.screen_height))

# Full screen

# self.screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)

# self.settings.screen_width = self.screen.get_rect().width

# self.settings.screen_height = self.screen.get_rect().height

pygame.display.set_caption("Starry Sky")

self.stars = pygame.sprite.Group()

self._create_starry_field()

def _create_starry_field(self):

"""Create the field of stars."""

# Create a star and find the number of stars in a row if spaced evenly.

star = Star(self)

star_width, star_height = star.rect.size

available_space_x = self.settings.screen_width - (2 * star_width)

number_stars_x = available_space_x // (2 * star_width)

# Determine the number of rows of stars that fit if spaced evenly.

available_space_y = (self.settings.screen_height - 3 * star_height)

number_stars_y = available_space_y // (2 * star_height)

# Determine the number of stars to create.

number_stars = number_stars_x * number_stars_y

# Create the full field of of stars.

for star_number in range(number_stars):

self._create_star(star_number)

def _create_star(self, star_number):

#Create a star and place it in the row.

star = Star(self)

star_width, star_height = star.rect.size

star.x = randint(0, self.settings.screen_width - star_width)

star.rect.x = star.x

star.rect.y = randint(0, self.settings.screen_height - star_height)

self.stars.add(star)

def run_game(self):

"""Start the main loop for the game."""

while True:

self._check_events()

self._update_screen()

def _check_events(self):

"""Respond to key presses and mouse events."""

# Gracefully exit when 'X' or alt+F4 close the window

for event in pygame.event.get():

if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN

and event.key == pygame.K_q):

pygame.quit()

# sys.exit() - in text, but does not close gracefully

def _update_screen(self):

"""Update images on the screen, and flip to the new screen."""

self.screen.fill(self.settings.bg_color)

self.stars.draw(self.screen)

# Make the most recently drawn screen visible.