Pygame按钮没有创建工作按钮

Question

我想在pygame中做一个hang子手游戏，但是我不能让按钮在事件创建后工作（在我的情况下，按下Enter键后），它们出现在屏幕上，但是不工作（翻转或激活事件），请帮助！

from pygame.locals import * 
 
import pygame, sys, eztext 
 
import time 
 

 
pygame.init() 
 

 
Black  = ( 0, 0, 0) 
 
Grey  = (100, 100, 100) 
 
DarkGrey = (70, 70, 70) 
 
White  = (255, 255, 255) 
 
Blue  = ( 0, 0, 255) 
 
NavyBlue = (60, 60, 100) 
 
Cyan  = ( 0, 255, 255) 
 
Purple  = (255, 0, 255) 
 
Red  = (255, 0, 0) 
 
DarkRed = (180, 0, 0) 
 
Orange  = (255, 128, 0) 
 
Yellow  = (255, 255, 0) 
 
Green  = ( 0, 255, 0) 
 
DarkGreen = ( 0, 180, 0) 
 
LightBlue = (90, 164, 213) 
 
Magenta = (153, 0, 76) 
 

 
screen = pygame.display.set_mode((1000,600),0,32) 
 
screen.fill(Orange) 
 
txtbx = eztext.Input(maxlength=45, color=(0,0,0), prompt='Enter username: ') 
 

 
def text_objects(text, font): 
 
    textSurface = font.render(text, True, Black) 
 
    return textSurface, textSurface.get_rect() 
 
smallText = pygame.font.Font("freesansbold.ttf",20) 
 

 
def button(msg,x,y,w,h,ic,ac,action=None): 
 
    if x+w > mouse[0] > x and y+h > mouse[1] > y: 
 
     pygame.draw.rect(screen, ac,(x, y, w, h))  
 
     if click [0] == 1 and action!= None:   
 
      if action == "Quit": 
 
       pygame.quit() 
 
      if action == "Single player": 
 
       pygame.draw.rect(screen, Green,(10, 10, 500, 500)) 
 

 
    else: 
 
     pygame.draw.rect(screen, ic,(x, y, w, h)) 
 

 
    smallText = pygame.font.Font("freesansbold.ttf",20) 
 
    textSurf, textRect = text_objects(msg, smallText) 
 
    textRect.center = ((x+(w/2)), (y + (h/2))) 
 
    screen.blit(textSurf, textRect) 
 
    
 
while True: 
 
    mouse = pygame.mouse.get_pos() 
 
    click = pygame.mouse.get_pressed() 
 
    
 
    string1 = txtbx.value 
 
    pygame.display.update() 
 
    time.sleep(0.02) 
 
     
 
    pygame.draw.rect(screen, Green,(10, 100, 500, 50)) 
 
    
 
    clock = pygame.time.Clock() 
 
    clock.tick(30) 
 
    
 
    events = pygame.event.get() 
 
    
 
    txtbx.set_pos(10,110) 
 

 
    label = smallText.render("Enter you user name and then press enter!", 1, (0,0,0)) 
 
    screen.blit(label, (10, 10))         
 

 
    for event in events: 
 
    
 
     if event.type == pygame.KEYDOWN: 
 
      if event.key == pygame.K_KP_ENTER or event.key == pygame.K_RETURN: 
 
       button("Single player",10, 400, 150, 50, Green, DarkGreen,"Single player") 
 
       if string1 in open('Users.txt').read(): 
 
        username = string1 
 
        Welcomeold1 = smallText.render('Welcome back', 1, (0,0,0)) 
 
        screen.blit(Welcomeold1, (10, 200)) 
 
        Welcomeold2 = smallText.render(username, 1, (0,0,0)) 
 
        screen.blit(Welcomeold2, (160, 200)) 
 

 
       else: 
 
        username = string1 
 
        f = open('Users.txt','a') 
 
        string1 = txtbx.value 
 
        f.write(string1) 
 
        f.write('\n')           
 
        f.close() 
 
        Welcomenew1 = smallText.render('Welcome to my game', 1, (0,0,0)) 
 
        screen.blit(Welcomenew1, (10, 200)) 
 
        Welcomenew2 = smallText.render(username, 1, (0,0,0)) 
 
        screen.blit(Welcomenew2, (230, 200)) 
 
      if event.key == pygame.K_BACKSPACE: 
 
       screen.fill(Orange) 
 
                
 
    txtbx.update(events) 
 
    txtbx.draw(screen) 
 
    pygame.display.flip() 
 

 
if __name__ == '__main__': main()

Answer 1

button功能里面event.key所以它只会在RETURN被按下，释放，再次按下，并再次释放，工作等

您应该创建方法类draw和handle_event在不同地方的主循环中使用此方法。您可以在event.key中创建按钮，但必须在不同的地方按下按钮。

-

简单的按钮。充分的工作例子。

当您按下按钮功能do_it被称为和背景更改颜色。

# 
# pygame (simple) template - by furas 
# 

# --------------------------------------------------------------------- 

import pygame 
import pygame.gfxdraw 
import random 

# === CONSTANS === (UPPER_CASE names) 

BLACK = ( 0, 0, 0) 
WHITE = (255, 255, 255) 

RED = (255, 0, 0) 
GREEN = ( 0, 255, 0) 
BLUE = ( 0, 0, 255) 

CYAN = ( 0, 255, 255) 
MAGENTA = (255, 0, 255) 
YELLOW = (255, 255, 0) 

SCREEN_WIDTH = 800 
SCREEN_HEIGHT = 600 

# === CLASSES === (CamelCase names) 

class Button(): 

    def __init__(self, text, x, y, width, height, on_click=None, fg_color=RED, bg_color=WHITE, font_size=35): 
     self.text = text 

     font = pygame.font.SysFont(None, font_size) 

     # rectangle - without position, to put text in correct place 
     self.rect = pygame.Rect(0, 0, width, height) 

     # normal button - fill background 
     self.normal_image = pygame.surface.Surface(self.rect.size) 
     self.normal_image.fill(bg_color) 

     # normal button - add text 
     text_image = font.render(text, True, fg_color) 
     text_rect = text_image.get_rect(center=self.rect.center) 
     self.normal_image.blit(text_image, text_rect) 

     # hover button - fill background 
     self.hover_image = pygame.surface.Surface(self.rect.size) 
     self.hover_image.fill(fg_color) 

     # hover button - add text 
     text_image = font.render(text, True, bg_color) 
     text_rect = text_image.get_rect(center=self.rect.center) 
     self.hover_image.blit(text_image, text_rect) 

     # set position 
     self.rect.x = x 
     self.rect.y = y 

     # other 
     self.on_click = on_click 
     self.hover = False 

    def draw(self, surface): 
     # draw normal or hover image 
     if self.hover: 
      surface.blit(self.hover_image, self.rect) 
     else: 
      surface.blit(self.normal_image, self.rect) 

    def event_handler(self, event): 
     # is mouse over button ? 
     if event.type == pygame.MOUSEMOTION: 
      self.hover = self.rect.collidepoint(event.pos) 

     # is mouse clicked ? run function. 
     if event.type == pygame.MOUSEBUTTONDOWN: 
      if self.hover and self.on_click: 
       self.on_click() 

# === FUNCTIONS === (lower_case names) 

def do_it(): 
    global background_color 

    if background_color == BLACK: 
     background_color = RED 
    elif background_color == RED: 
     background_color = GREEN 
    else: 
     background_color = BLACK 

    print("Button pressed") 


# === MAIN === 

# --- init --- 

pygame.init() 

screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT)) 
screen_rect = screen.get_rect() 

# --- objects --- 

# create button 
button = Button('CHANGE COLOR', 0, 0, 300, 50, on_click=do_it) 

# add function later 
#button_quit.on_click = do_it 

# center button 
button.rect.center = screen_rect.center 

# default bacground color - changed in do_it() 
background_color = BLACK 

# --- mainloop --- 

clock = pygame.time.Clock() 
is_running = True 

while is_running: 

    # --- events --- 

    for event in pygame.event.get(): 

     # --- global events --- 

     if event.type == pygame.QUIT: 
      is_running = False 
     elif event.type == pygame.KEYDOWN: 
      if event.key == pygame.K_ESCAPE: 
       is_running = False 

     # --- objects events --- 

     button.event_handler(event) 

    # --- updates --- 

     # empty 

    # --- draws --- 

    # clear buffer 
    screen.fill(background_color) 

    # draw all objects - widgets (buttons, labels) 

    button.draw(screen) 

    clock.tick(25) 

    # send buffer to video card 
    pygame.display.update() 

# --- the end --- 

pygame.quit()