手柄按键显示器-白红宇

#起因朋友叫我去做一个可以用来在直播时候显示手柄按了哪些键的软件

#过程 ##官方例子 Google了下找到了pygame中有joystick包可以控制手柄。有全套控制手柄的方法，下图是实例的界面

##项目实现

import pygame, os# Define some colorsBLACK    = (   0,   0,   0)WHITE    = ( 255, 255, 255)pygame.init()size = [100, 50]screen = pygame.display.set_mode(size,pygame.RESIZABLE)pygame.display.set_caption("joystick show")class Btn(pygame.sprite.Sprite):    def __init__(self,image_path, alpha, pos):        super(Btn, self).__init__()        self.image = pygame.image.load(image_path)        self.alpha = alpha        self.postion = posCURRENT_PATH = os.path.dirname(__file__)KEY_Y = Btn(os.path.join(CURRENT_PATH,'y.png'), 60, (60,0))KEY_X = Btn(os.path.join(CURRENT_PATH,'x.png'), 60, (45,15))KEY_A = Btn(os.path.join(CURRENT_PATH,'a.png'), 60, (60,30))KEY_B = Btn(os.path.join(CURRENT_PATH,'b.png'), 60, (75,15))KEY_U = Btn(os.path.join(CURRENT_PATH,'u.png'), 60, (16,5))KEY_D = Btn(os.path.join(CURRENT_PATH,'d.png'), 60, (16,34))KEY_L = Btn(os.path.join(CURRENT_PATH,'l.png'), 60, (0,21))KEY_R = Btn(os.path.join(CURRENT_PATH,'r.png'), 60, (29,21))keys_btn = pygame.sprite.Group()keys_pos = pygame.sprite.Group()keys_btn.add(KEY_Y)keys_btn.add(KEY_X)keys_btn.add(KEY_A)keys_btn.add(KEY_B)keys_pos.add(KEY_L)keys_pos.add(KEY_R)keys_pos.add(KEY_U)keys_pos.add(KEY_D)#Loop until the user clicks the close button.done = False    # Used to manage how fast the screen updatesclock = pygame.time.Clock()# Initialize the joysticksdef joystick_init():    pygame.joystick.init()joystick_init()    def blit_alpha(target, source, location, opacity):        x = location[0]        y = location[1]        temp = pygame.Surface((source.get_width(), source.get_height())).convert()        temp.blit(target, (-x, -y))        temp.blit(source, (0, 0))        temp.set_alpha(opacity)                target.blit(temp, location)while done==False:    # EVENT PROCESSING STEP    for event in pygame.event.get():        if event.type == pygame.QUIT:             done=True # Flag that we are done so we exit this loop        if event.type == pygame.JOYAXISMOTION:            x,y = joystick.get_axis(0),joystick.get_axis(1)            for key_pos in keys_pos:                key_pos.alpha = 60            if x > 0.1:                KEY_R.alpha = 255                if y > 0.1:                    KEY_D.alpha = 255                elif  y < -0.1:                    KEY_U.alpha = 255            elif x < -0.1:                KEY_L.alpha = 255                if y > 0.1:                    KEY_D.alpha = 255                elif  y < -0.1:                    KEY_U.alpha = 255        if event.type == pygame.JOYBUTTONDOWN:            if event.button == 0:                KEY_A.alpha = 255            elif event.button == 1:                KEY_B.alpha = 255            elif event.button == 2:                KEY_X.alpha = 255            elif event.button == 3:                KEY_Y.alpha = 255        if event.type == pygame.JOYBUTTONUP:            if event.button == 0:                KEY_A.alpha = 60            elif event.button == 1:                KEY_B.alpha = 60            elif event.button == 2:                KEY_X.alpha = 60            elif event.button == 3:                KEY_Y.alpha = 60                screen.fill(BLACK)    for key_btn in keys_btn:        blit_alpha(screen,key_btn.image,key_btn.postion, key_btn.alpha)    for key_pos in keys_pos:        blit_alpha(screen,key_pos.image,key_pos.postion, key_pos.alpha)        joystick = pygame.joystick.Joystick(0)    joystick.init()         pygame.display.flip()    # Limit to 20 frames per second    clock.tick(10)    pygame.quit ()复制代码

![6OJZQ61{@T14L)EQ9K)%6]M.gif](http://upload-images.jianshu.io/upload_images/5555510-f94f0ea8f5a2bac0.gif?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)