使用Tkinter绑定和画布进行线程化 [英] Threading with Tkinter bind and canvas

问题描述

我在Tkinter的canvas.coords()方法上遇到问题.我试图每1/60秒更新一次画布，并试图检测何时按下向右箭头键.问题是当我按住向右箭头一会儿时出现错误:

I am having problems with Tkinter's canvas.coords() method. I am trying to update the canvas every 1/60 of a second and trying to detect when the Right arrow key is pressed. The problem is that when I keep the right arrow pressed for a while I get an error :

http://postimage.org/image/bdfk3m8gx/

我的脚本是'novo.py'，代码如下.有什么帮助吗?我只是个初学者.

My script is 'novo.py' and the code is given below. Any help perhaps? I'm just a begginer.

import Tkinter, threading, time

def real_time(td, canvas):
    while True:
        time.sleep(1/60.0)
        canvas.coords('line',1,1,200,200)

def func(event):
    print 'key pressed'


root = Tkinter.Tk()
canvas = Tkinter.Canvas(root)
canvas.pack()
canvas.create_line(1,1,100,100, tag='line')
root.bind('<Right>', func)
thread = threading.Thread(target = real_time, args = (1/60.0, canvas))
thread.start()
root.mainloop()

推荐答案

Tkinter不是线程安全的，很多时候根本不需要线程.

Tkinter is not thread safe, and quite often threads simply aren't needed.

在您的情况下，您可以使用after每N毫秒周期性地进行一次录音.例如，要每秒运行约60次，您将执行以下操作:

In your case you can use after to periodically ron something every N milliseconds. For example, to run something approximately 60 times per second you would do something like this:

def real_time():
    <do something here>
    self.after(16, real_time)

然后，在程序启动时调用此函数一次:

Then, call this function once when your program starts up:

real_time()

这篇关于使用Tkinter绑定和画布进行线程化的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！