I've been recently working on alien invasion project from python crash course. I've come across a task where I've to make difficulty buttons for the user. I want to make it in such a way, that when the user runs the game , first the play button will be available , after he clicks the play button the difficulty buttons(easy,medium,difficult) will be shown to the user.
import sys
from time import sleep
import pygame
from settings import Settings
from game_stats import GameStats
from ship import Ship
from bullet import Bullet
from alien import Alien
from button import Button
class AlienInvasion:
"""Overall class to manage game assets and behavior."""
def __init__(self):
"""Initialize the game, and create game resources."""
pygame.init()
self.settings = Settings()
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("Alien Invasion")
self.stats = GameStats(self)
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self._create_fleet()
self.play_button = Button(self, "Play")
self._make_difficulty_buttons()
def run_game(self):
"""Start the main loop for the game."""
while True:
self._check_events()
if self.stats.game_active:
self.ship.update()
self._update_bullets()
self._update_aliens()
self._update_screen()
def _check_events(self):
"""Respond to key presses and mouse events."""
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
self._check_keydown_events(event)
elif event.type == pygame.KEYUP:
self._check_keyup_events(event)
elif event.type == pygame.MOUSEBUTTONDOWN:
mouse_pos = pygame.mouse.get_pos()
self._check_play_button(mouse_pos)
def _check_play_button(self, mouse_pos):
"""Start a new game when the player clicks play."""
button_clicked = self.play_button.rect.collidepoint(mouse_pos)
if button_clicked:
self._draw_difficulty_buttons()
def _draw_difficulty_buttons(self):
self.easy_button.draw_button()
self.medium_button.draw_button()
self.difficult_button.draw_button()
def _make_difficulty_buttons(self):
"""Make buttons that allow the players to select difficulty levels"""
self.easy_button = Button(self, "Easy")
self.medium_button = Button(self, "Medium")
self.difficult_button = Button(self, "Difficult")
# Position buttons so they don't all overlap.
self.easy_button.rect.top = (
self.play_button.rect.top + 1.5*self.play_button.rect.height)
self.easy_button._update_msg_position()
self.medium_button.rect.top = (
self.easy_button.rect.top + 1.5*self.easy_button.rect.height)
self.medium_button._update_msg_position()
self.difficult_button.rect.top = (
self.medium_button.rect.top + 1.5*self.medium_button.rect.height)
self.difficult_button._update_msg_position()
def _check_keydown_events(self, event):
"""Respond to key presses"""
if event.key == pygame.K_RIGHT:
self.ship.moving_right = True
elif event.key == pygame.K_LEFT:
self.ship.moving_left = True
elif event.key == pygame.K_q:
sys.exit()
elif event.key == pygame.K_SPACE:
self._fire_bullet()
def _check_keyup_events(self, event):
"""Respond to key releases."""
if event.key == pygame.K_RIGHT:
self.ship.moving_right = False
if event.key == pygame.K_LEFT:
self.ship.moving_left = False
def _fire_bullet(self):
"""Create a new bullet and add it to the group."""
if len(self.bullets) < self.settings.bullets_allowed:
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _update_bullets(self):
"""Update position of the bullets and get rid of the old bullets."""
self.bullets.update()
# Get rid of bullets that have disappeared.
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
self._check_bullet_collisions()
def _check_bullet_collisions(self):
"""Respond to bullet-alien collision"""
# Check for any bullets that has hit aliens.
# if so, get rid of the bullet and the alien
collisions = pygame.sprite.groupcollide(
self.bullets, self.aliens, True, True)
if not self.aliens:
# Destroy existing bullets and create a new fleet.
self.bullets.empty()
self._create_fleet()
self.settings.increase_speed()
def _update_aliens(self):
"""
Check if the fleet is at an edge,
then update the positions of all aliens in the fleet.
"""
self._check_fleet_edges()
self.aliens.update()
# Look for alien-ship collision.
if pygame.sprite.spritecollideany(self.ship, self.aliens):
self._ship_hit()
# Look for aliens hitting the bottom of the screen.
self._check_aliens_bottom()
def _create_fleet(self):
"""Create the fleet of aliens."""
# Create an alien and find the number of aliens in a row.
# Spacing between each alien is equal to one alien width.
alien = Alien(self)
alien_width, alien_height = alien.rect.size
available_space_x = self.settings.screen_width - (2 * alien_width)
number_aliens_x = available_space_x // (2 * alien_width)
# Determine the number of rows of aliens that fit on the screen.
ship_height = self.ship.rect.height
available_space_y = (self.settings.screen_height -
(3 * alien_height) - ship_height)
number_rows = available_space_y // (2 * alien_height)
# Create the full fleet of aliens.
for row_number in range(number_rows):
for alien_number in range(number_aliens_x):
self._create_alien(alien_number, row_number)
def _create_alien(self, alien_number, row_number):
""""Create an alien and place it in the row"""
alien = Alien(self)
alien_width, alien_height = alien.rect.size
alien.x = alien_width + 2 * alien_width * alien_number
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number
self.aliens.add(alien)
def _check_fleet_edges(self):
"""Respond appropriately if any aliens have reached an edge."""
for alien in self.aliens.sprites():
if alien.check_edges():
self._change_fleet_direction()
break
def _change_fleet_direction(self):
"""Drop the entire fleet and change the fleet's direction."""
for alien in self.aliens.sprites():
alien.rect.y += self.settings.fleet_drop_speed
self.settings.fleet_direction *= -1
def _ship_hit(self):
"""Respond to the ship being hit by an alien."""
if self.stats.ships_left > 0:
# Decrement ships left
self.stats.ships_left -= 1
# Get rid of any remaining aliens and bullets
self.aliens.empty()
self.bullets.empty()
# Create a new fleet and centre the ship
self._create_fleet()
self.ship.centre_ship()
# Pause.
sleep(1)
else:
self.stats.game_active = False
pygame.mouse.set_visible(True)
def _check_aliens_bottom(self):
"""Check if any aliens have reached the bottom of the screen."""
screen_rect = self.screen.get_rect()
for alien in self.aliens.sprites():
if alien.rect.bottom >= screen_rect.bottom:
# Treat this the same as if the ship got hit.
self._ship_hit()
break
def _update_screen(self):
"""Update images on the screen, and flip to the new screen."""
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
self.aliens.draw(self.screen)
# Draw the play button if the game is inactive.
if not self.stats.game_active:
self.play_button.draw_button()
# Make the most recently drawn screen visible.
pygame.display.flip()
if __name__ == '__main__':
# Make a game instance, and run the game.
ai = AlienInvasion()
ai.run_game()
look for the function make_difficulty_buttons , draw_difficulty_buttons and check_play_button. In check_play_button method after pygame detects that user has clicked the play button, I want to draw the difficulty buttons using draw_difficulty_buttons method. But in my code nothing happens after I click on the play button. pls help me out. thankyou in advance
