python - 在 ttk 进度条中显示百分比

Question

我正在尝试在函数运行时在 ttk.Progressbar 中显示百分比，以提醒用户已执行的进程的范围和剩余的进程。能够正确显示百分比，但百分比最高为 23%，这是我的 元组 的长度。

如何使 tuple 的 length 达到 100%

import tkinter as tk
import tkinter.ttk as ttk
import time


tuple_1 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24]
brt = len(tuple_1)

def progress_bar_func():
    num = 0
    for item in range(brt):  # THIS
        print(item)
        num += 1  # THIS MEANS ADDING ONE TO THE PREVIOUS VALUE
        progressBar['value'] = num
        # THIS UPDATING TEXT IN PROGRESSBAR WITH PERCENTAGE
        style.configure('text.Horizontal.TProgressbar',
                        text='{:g} %'.format(item))
        root.update_idletasks()
        time.sleep(2)


root = tk.Tk()
root.geometry("300x300")

# THIS STYLE FOR THE PROGRESSBAR
style = ttk.Style(root)
style.layout('text.Horizontal.TProgressbar',
             [('Horizontal.Progressbar.trough',
               {'children': [('Horizontal.Progressbar.pbar',
                              {'side': 'left', 'sticky': 'ns'})],
                'sticky': 'nswe'}),
              ('Horizontal.Progressbar.label', {'sticky': ''})])
              # ,lightcolor=None,bordercolo=None,darkcolor=None
style.configure('text.Horizontal.TProgressbar', text='0 %')

progressBar = ttk.Progressbar(root,style='text.Horizontal.TProgressbar', length=200,  maximum=brt, value=0,)
progressBar.pack()

progress_button = tk.Button(root, text="start", command=progress_bar_func)
progress_button.pack()

root.mainloop()

Answer 1

正如@Bryan Oakley 和其他人指出的那样，解决方案主要是正确地进行数学计算。这是根据您问题中的代码执行此操作的具体示例。我还对其进行了修改，以演示 Progressbar 以我认为稍微好一点的方式工作——即使用通用的 after()。函数定期更新柱的值。

import time
import tkinter as tk
import tkinter.ttk as ttk

tuple_1 = tuple(range(1, 25))

def progress_bar_func(style, progress_bar, sequence):
    root.after(500, update_progress_bar, style, progress_bar, 1, len(sequence))

def update_progress_bar(style, progress_bar, num, limit):
    if num <= limit:
        percentage = round(num/limit * 100)  # Calculate percentage.
        progress_bar.config(value=num)
        style.configure('text.Horizontal.TProgressbar', text='{:g} %'.format(percentage))
        num += 1
        root.after(500, update_progress_bar, style, progress_bar, num, limit)

root = tk.Tk()
root.geometry("300x300")

style = ttk.Style(root)
style.layout('text.Horizontal.TProgressbar',
             [('Horizontal.Progressbar.trough',
               {'children': [('Horizontal.Progressbar.pbar',
                              {'side': 'left', 'sticky': 'ns'})],
                'sticky': 'nswe'}),
              ('Horizontal.Progressbar.label', {'sticky': ''})])
style.configure('text.Horizontal.TProgressbar', text='0 %')

progress_bar = ttk.Progressbar(root, style='text.Horizontal.TProgressbar', length=200,
                               maximum=len(tuple_1), value=0)
progress_bar.pack()

progress_button = tk.Button(root, text="start",
                            command=lambda: progress_bar_func(style, progress_bar, tuple_1))
progress_button.pack()

root.mainloop()

Progressbar 完成后的截图: