是否可以改进 Tkinter-Python 中的进度条，在中间添加标签（例如：读取文件）？
我试图找到一个优雅的编码解决方案，但没有真正的结果
from Tkinter import *
import ttk
import tkFileDialog
import time
class MainWindow(Frame):
def __init__(self):
Frame.__init__(self)
self.master.title("ProgressBar example")
self.master.minsize(200, 100)
self.grid(sticky=E+W+N+S)
top = self.winfo_toplevel()
top.rowconfigure(0, weight=1)
top.columnconfigure(0, weight=1)
self.start_ind = Button(self, text='Start indeterminate', command=self.start_ind, activeforeground="red")
self.start_ind.grid(row=0, column=0, pady=2, padx=2, sticky=E+W+N+S)
self.pbar_ind = ttk.Progressbar(self, orient="horizontal", length=300, mode="indeterminate")
self.pbar_ind.grid(row=1, column=0, pady=2, padx=2, sticky=E+W+N+S)
def start_ind(self):
for i in xrange(50):
self.pbar_ind.step(1)
self.update()
# Busy-wait
time.sleep(0.1)
if __name__=="__main__":
d = MainWindow()
d.mainloop()
我通过创建自定义 ttk 样式布局在进度条内添加了标签。通过配置样式来改变标签的文本：
from tkinter import Tk
from tkinter.ttk import Progressbar, Style, Button
from time import sleep
root = Tk()
s = Style(root)
# add the label to the progressbar style
s.layout("LabeledProgressbar",
[('LabeledProgressbar.trough',
{'children': [('LabeledProgressbar.pbar',
{'side': 'left', 'sticky': 'ns'}),
("LabeledProgressbar.label", # label inside the bar
{"sticky": ""})],
'sticky': 'nswe'})])
p = Progressbar(root, orient="horizontal", length=300,
style="LabeledProgressbar")
p.pack()
# change the text of the progressbar,
# the trailing spaces are here to properly center the text
s.configure("LabeledProgressbar", text="0 % ")
def fct():
for i in range(1, 101):
sleep(0.1)
p.step()
s.configure("LabeledProgressbar", text="{0} % ".format(i))
root.update()
Button(root, command=fct, text="launch").pack()
root.mainloop()
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