Python使用tkinter实时动态显示图像闪烁问题？

Question

global img_
global laser_map

    # 地图数据，从服务器收到数据，先解码
    laser_map = base64.b64decode(msg)
    file_image = open('build_map.png', 'wb+')
    file_image.write(laser_map)


    img_ = Image.open("build_map.png",)
    width, height = img_.size


    # 做旋转操作
    if width < height:
        self.rotate_flag = True
        img_.rotate(90, expand=True).save('build_map_rotate.png')
    else:
        self.rotate_flag = False
        img_.rotate(0, expand=True).save('build_map_rotate.png')

    self.zoom_map_image = Image.open('build_map_rotate.png')



     # PIL project tranform into  PhotoImage project
     laser_map = ImageTk.PhotoImage(self.zoom_map_image)


     self.laser = self.canvas_map.create_image(self.canvas_center_x, self.canvas_center_y, anchor='center',image=laser_map)

     self.canvas_map.place(x=0, y=0)

Answer 1

个人尝试用Canvas加载图片总是会闪烁，但发现用ttk的Frame和ttk的Label可以解决
我这里做了一个显示屏幕的小程序，可以看看有没有可以借鉴的地方。代码后面有关键部位的解释。

import tkinter
import tkinter.ttk
import _thread
import time
import PIL
import PIL.Image
import PIL.ImageGrab
import PIL.ImageTk

img = None
TkImg = None
st = time.perf_counter()
main = tkinter.Tk()
main.title('Your Screen')
F = tkinter.ttk.Frame(main, width=1920, height=1080)
L = tkinter.ttk.Label(F)
L.place(x=0, y=0)
F.place(x=0, y=0)

def RefreshImg():
    global img, TkImg, main, L, st
    img = PIL.ImageGrab.grab()
    TkImg = PIL.ImageTk.PhotoImage(img)
    L.config(image=TkImg)
    main.title('Your Screen - Refresh Rate : ' + str((1/(time.perf_counter()-st)).__round__(1)) + 'fps')
    st = time.perf_counter()
    main.after(1, lambda:_thread.start_new_thread(RefreshImg, ()))

main.after(1, lambda:_thread.start_new_thread(RefreshImg, ()))
main.mainloop()

Label和Frame都必须是tkinter.ttk里面的，并且必须用place摆放部件
我用了多线程处理刷新图片，避免加载图片120ms左右导致窗口未响应