如何在 python 中实现 tkinter 进度条，用户可以在停止的同一位置暂停和重新启动进度条？

Question

这是我到目前为止的代码，理想情况下，我希望它暂停，直到用户再次单击开始。任何帮助表示赞赏！非常感谢:) <3

from tkinter import *
from tkinter import ttk
import time
from threading import *
import threading
import _thread

def start():
   w.start()

def stop():
   time.sleep(10)


def stopfunc():
    _thread.start_new_thread(stop,())

window = Tk()

w = ttk.Progressbar(window)
w.pack()
button1 = ttk.Button(window, text = 'start', command = start)
button1.pack()
button2 = ttk.Button(window, text = 'stop', command = stopfunc)
button2.pack()
window.mainloop()

Answer 1

将

variable

参数设置为控制变量，例如

IntVar

。

from tkinter import *
from tkinter import ttk


def start():
    
   w.start()

def stopfunc():
    w.stop()
    #var.set(var.get())

def reset():
    var.set(0)

window = Tk()

var = IntVar()

w = ttk.Progressbar(window, variable=var)
w.pack()
button1 = ttk.Button(window, text = 'start', command = start)
button1.pack()
button2 = ttk.Button(window, text = 'stop', command = stopfunc)
button2.pack()

button2 = ttk.Button(window, text = 'reset', command = reset)
button2.pack()


window.mainloop()

Answer 2

如果您需要进度条与循环并发，这里有一种方法可以做到这一点：

from tkinter import *
from tkinter import ttk

ttl_ticks = 77  # your countable range
current_tick = 0
pause = True


def start_pause():
    global current_tick
    global pause
    pause = not pause
    while current_tick < ttl_ticks:
        if not pause:
            if current_tick == 0:
                w.start()
            w['value'] = current_tick / ttl_ticks * 100

            w.update()
            w.after(60)

            current_tick += 1
            if current_tick == ttl_ticks:
                w.stop()
                w['value'] = 100
                current_tick = 0
                pause = True
                break
        else:
            w.stop()
            w['value'] = current_tick / ttl_ticks * 100
            break


def reset():
    global current_tick
    global pause
    w.stop()
    pause = True
    current_tick = 0


window = Tk()

w = ttk.Progressbar(window, mode='determinate', length=180)
w.pack()
button1 = ttk.Button(window, text='start / pause', command=start_pause)
button1.pack()
button2 = ttk.Button(window, text='reset', command=reset)
button2.pack()

window.mainloop()