按鈕不斷出現并重新出現

我遇到了一個問題，我在視窗中添加了兩個按鈕，但它們會不斷出現并重新出現在視窗上。我不認為它們是任何形式的回圈，但我在這方面可能完全錯了。只要網路攝像頭關閉，按鈕就會保持靜止，但一旦網路攝像頭打開，按鈕就會開始消失并再次出現。我正在尋找一種方法讓按鈕在視窗上保持靜止，同時網路攝像頭處于活動狀態。請注意，我正在使用 cv2 庫在視窗上顯示我的網路攝像頭。

這是我的代碼：

import pygame 
import cv2
#import numpy as np

pygame.init()

# setting the width and height of the window
WIDTH, HEIGHT = 1280, 720
WINDOW = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("PANIC")

# background color 
color = ("black")

# Webcam 
camera = cv2.VideoCapture(0) # 0 is the built in webcam
camera.set(cv2.CAP_PROP_FRAME_WIDTH, 1200) # frame width 
camera.set(cv2.CAP_PROP_FRAME_HEIGHT, 1000) # frame height 

# function that will display (draw) stuff 
def draw_window():
    # background color 
    WINDOW.fill((color))
    success, image = camera.read()
    if success:
        camera_surf = pygame.image.frombuffer(image.tobytes(), image.shape[1::-1], "BGR")
        WINDOW.blit(camera_surf, (0,0))
    
    # Buttons 
    for event in pygame.event.get():
        if event.type == pygame.MOUSEMOTION:
            # 2. put the collide check for mouse hover here for each button
            if b0.rect.collidepoint(pygame.mouse.get_pos()):
                b0.colors = "red on green"
            elif b1.rect.collidepoint(pygame.mouse.get_pos()):
                b1.colors = "red on green"
            else:
                # this will work for every buttons going back to original color after mouse goes out
                not_hover()
        if event.type == pygame.MOUSEBUTTONDOWN:
            # 3. here the interactions with the click of the mouse... done
            if b0.rect.collidepoint(pygame.mouse.get_pos()):
                print("ON") # print text of button 1
            if b1.rect.collidepoint(pygame.mouse.get_pos()):
                print("OFF") # prints text of button 2 
                
        buttons.update()
        buttons.draw(WINDOW)
    
    # update the display
    pygame.display.update()

FPS = 30
def mainWindow():
    # keeping the window open 
    run = True 
    clock = pygame.time.Clock()
    while run: 
        # capping it at the set frame rate 
        clock.tick(FPS)
        
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                        
        draw_window()
        pygame.display.update()
        
    # closing the window 
    pygame.quit()
    
              
              
def not_hover():
    for x in buttons:
        x.colors = "red on yellow"
        x.update()

# button class 
buttons = pygame.sprite.Group()
class Button(pygame.sprite.Sprite):
    def __init__(self, WINDOW, position, text, size, colors="white on blue"):
        super().__init__()
        self.colors = colors
        self.fg, self.bg = self.colors.split(" on ")
        self.font = pygame.font.SysFont("Arial", size)
        self.text_render = self.font.render(text, 1, self.fg)
        self.image = self.text_render
        self.x, self.y, self.w , self.h = self.text_render.get_rect()
        self.x, self.y = position
        self.rect = pygame.Rect(self.x, self.y, self.w, self.h)
        self.position = position
        self.update()
        buttons.add(self)

    def update(self):
        self.fg, self.bg = self.colors.split(" on ")
        pygame.draw.line(WINDOW, (150, 150, 150), (self.x, self.y), (self.x   self.w , self.y), 5)
        pygame.draw.line(WINDOW, (150, 150, 150), (self.x, self.y - 2), (self.x, self.y   self.h), 5)
        pygame.draw.line(WINDOW, (50, 50, 50), (self.x, self.y   self.h), (self.x   self.w , self.y   self.h), 5)
        pygame.draw.line(WINDOW, (50, 50, 50), (self.x   self.w , self.y   self.h), [self.x   self.w , self.y], 5)
        pygame.draw.rect(WINDOW, self.bg, (self.x, self.y, self.w , self.h))

b0 = Button(WINDOW, (800, 10), "SWITCH ON", 55, "red on yellow")
b1 = Button(WINDOW, (800, 100), "SWITCH OFF", 55, "red on yellow")


# main #
mainWindow()

uj5u.com熱心網友回復：

這是一個縮進的問題。buttons.update()并且buttons.draw(WINDOW)必須在應用程式回圈而不是事件回圈中呼叫：

def draw_window():
    # background color 
    WINDOW.fill((color))
    success, image = camera.read()
    if success:
        camera_surf = pygame.image.frombuffer(image.tobytes(), image.shape[1::-1], "BGR")
        WINDOW.blit(camera_surf, (0,0))
    
    # Buttons 
    for event in pygame.event.get():
        # [...]
                

    # INDENTATION
    #<--|
    buttons.update()
    buttons.draw(WINDOW)
    
    # update the display
    pygame.display.update()

標籤：Python用户界面按钮游戏

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