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#####################library files########################
import pygame
import time
import random


################this inistialises the pygame settings##########################
pygame.init()

#set up screen dimensions
display_width = 800
display_height = 600

size = display_width,display_height = 800,600
#colour constants for button backgrounds and screen backgrounds
BLACK = (0,0,0)
WHITE = (255,255,255)

RED = (200,0,0)
GREEN = (0,200,0)
YELLOW = (255,255,0)

BRIGHT_RED = (255,0,0)
BRIGHT_GREEN = (0,255,0)
LIGHT_YELLOW = (255,255,51)

AQUA = (0, 128, 128)
GRAY = (190, 190, 190)


#creates the screen area - will need one for each screen when using background images to be done next
# gamedisplay is the screen area where we draw things to from now on

gameDisplay = pygame.display.set_mode((display_width,display_height))
clock = pygame.time.Clock()    ### this enables us to set frame rate

#this creates our buttons parameters text, x position, y position, width of button, height of button, colour, hover colour, function to run.
def button(msg,x,y,w,h,ic,ac,action=None):
    mouse = pygame.mouse.get_pos()
    click = pygame.mouse.get_pressed()

    #check position and draw the rectangle - takes the screen we set up gameDisplay. We will need to amend if using multiple screens

    if x+w > mouse[0] > x and y+h > mouse[1] > y:
        pygame.draw.rect(gameDisplay, ac,(x,y,w,h))
        if click[0] == 1 and action != None:
            action()         
    else:
        pygame.draw.rect(gameDisplay, ic,(x,y,w,h))
    smallText = pygame.font.SysFont("arial",20)
    textSurf, textRect = text_objects(msg, smallText)
    textRect.center = ( (x+(w/2)), (y+(h/2)) )
    gameDisplay.blit(textSurf, textRect)









 



























#this is for text boxes on the screens i.e. titles etc
def text_objects(text, font):
    textSurface = font.render(text, True, BLACK)
    return textSurface, textSurface.get_rect()

# main menu screen
def main_menu():

    intro = True      #### will display until we set to false
    
    while intro:
        for event in pygame.event.get():
            #checks that we havent hit the x in the window
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
        #set our screen background colour      
        
        gameDisplay.fill(GRAY)
        # display an image in the background
        image = pygame.image.load("Menu.jpg")       #loads the image
        image = pygame.transform.scale(image, size)  # resizes the image to fit the display
        gameDisplay.blit(image, (0,0))
        #loads the image



        #sets the text size and font for title -could be declared globally
        largeText = pygame.font.SysFont("tahoma",50)
        TextSurf, TextRect = text_objects("MAIN MENU", largeText)
         #sets the position of title text - i just changed the display_height divided by for vertical position
        TextRect.center = ((display_width/2),(display_height/5))
        gameDisplay.blit(TextSurf, TextRect)

        #call button function to create the buttons
        #these buttons trigger different game states
        button("PLAY!",350,250,125,50,GRAY,BRIGHT_GREEN,game_loop)
        button("Scoreboard",350,350,125,50,GRAY,BRIGHT_GREEN,score_board)
        button("Quit",350,450,125,50,GRAY,BRIGHT_GREEN,quitgame)















        pygame.display.update()
        clock.tick(15)  ### set frame rate to 15

        
#main game loop - change your main game play loop to a procedure so that it runs from the button.

def game_loop():
    intro = False      
    play = True
    scoreboard = False

    while play:
        for event in pygame.event.get():
            #print(event)
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
                
        gameDisplay.fill(GRAY)
        largeText = pygame.font.SysFont("TAHOMA",50)
        TextSurf, TextRect = text_objects("GAME PLAYING Here", largeText)
        TextRect.center = ((display_width/2),(display_height/3))
        gameDisplay.blit(TextSurf, TextRect)

        button("Main Menu",150,450,100,50,GRAY,BRIGHT_GREEN,main_menu)
        button("Score Board",350,450,125,50,GRAY,BRIGHT_GREEN,score_board)
        button("Quit",550,450,100,50,GRAY,BRIGHT_GREEN,quitgame)

        pygame.display.update()
        clock.tick(15)


#scoreboard -same set up as game_loop whilst we text menu and structure. will be added later
def score_board():
    #we may use these variables for a back button.
    intro = False
    play = False
    scoreboard = True

    while scoreboard:
        for event in pygame.event.get():
            #print(event)
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
                
        gameDisplay.fill(AQUA)
        largeText = pygame.font.SysFont("TAHOMA",50)
        TextSurf, TextRect = text_objects("Scoreboard Here", largeText)
        TextRect.center = ((display_width/2),(display_height/5))
        gameDisplay.blit(TextSurf, TextRect)

        button("Main Menu",150,450,100,50,GRAY,BRIGHT_GREEN,main_menu)
        button("Play",350,450,125,50,GRAY,BRIGHT_GREEN,game_loop)
        button("Quit",550,450,100,50,GRAY,BRIGHT_GREEN,quitgame)

        pygame.display.update()
        clock.tick(15)

    
def quitgame():
    pygame.quit()
    quit()

main_menu()