我正在尝试为执行某些任务的脚本创建tkinter GUI。通过单击开始按钮来触发任务,我想通过显示以下内容来添加动态标签,以显示任务“正在进行中”: “工作。” →“工作中..”→“工作中...”
我参考了this帖子并编写了以下脚本。在这里,我使用进度条来表示我的“任务”,并且期望状态标签在更新进度条时会发生变化(如上所述)。
import tkinter as tk
class UI:
def __init__(self):
self.root = tk.Tk()
self.root.title('Hello World')
self.prog_Label = tk.Label(self.root, text='Progress')
self.prog_Label.grid(row=0, column=0, sticky=tk.W, padx=20, pady=(10, 0))
self.prog_Bar = tk.ttk.Progressbar(self.root)
self.prog_Bar.configure(value=0, mode='determinate', orient='horizontal')
self.prog_Bar.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S), padx=20, pady=5)
self.exe_Btn = tk.Button(self.root, text='Start', padx=15, command=self.run, relief='groove')
self.exe_Btn.grid(row=2, column=0, padx=80, pady=(40, 20), sticky=tk.E)
self.prog_Label = tk.Label(self.root, text='Status:-')
self.prog_Label.grid(row=3, column=0, sticky=tk.W, padx=20, pady=10)
self.root.mainloop()
def run(self):
self.update_status('Working')
n = 0
self.prog_Bar.configure(value=n, maximum=100000, mode='determinate', orient='horizontal')
for i in range(100000):
n += 1
self.prog_Bar.configure(value=n)
self.prog_Bar.update_idletasks()
def update_status(self, status=None):
if status is not None:
current_status = 'Status: ' + status
else:
current_status = self.prog_Label['text']
if current_status.endswith('...'):
current_status = current_status.replace('...', '')
else:
current_status += '.'
self.prog_Label['text'] = current_status
self.prog_Label.update_idletasks()
self._status = self.root.after(1000, self.update_status)
if __name__ == '__main__':
ui = UI()
但是,该程序的行为方式是:单击“开始”按钮时,尽管状态标签立即从“-”变为“正在工作”,但它仅在进度条到达末尾时才开始添加点。
是否可以修改它以实现我的目的?
答案 0 :(得分:1)
我对您的结构进行了一些更改,因此您的任务现在位于其自己的类中,而无需睡觉,您可以在那里执行任务。我为该任务添加了一个线程,因为我认为它需要自己的进程,这会停止应用程序冻结,因为它将阻塞主UI循环。
import threading
import time
import tkinter as tk
import tkinter.ttk as ttk
class Task:
def __init__(self):
self.percent_done = 0
threading.Thread(target = self.run).start()
def run(self):
while self.percent_done < 1:
self.percent_done += 0.1
# Do your task here
time.sleep(0.5)
self.percent_done = 1
class Application():
def __init__(self):
self.root = tk.Tk()
self.root.title("Window Title")
self.task = None
self.label_dots = 0
self.prog_bar = tk.ttk.Progressbar(self.root)
self.prog_bar.configure(value=0, maximum=100, mode='determinate', orient='horizontal')
self.prog_bar.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S), padx=20, pady=5)
self.run_btn = tk.Button(self.root, text='Start', padx=15, command=self.start_task, relief='groove')
self.run_btn.grid(row=2, column=0, padx=80, pady=(40, 20), sticky=tk.E)
self.prog_label = tk.Label(self.root, text='Status: -')
self.prog_label.grid(row=3, column=0, sticky=tk.W, padx=20, pady=10)
def start_task(self):
self.task = Task()
self.update_ui()
def update_ui(self):
# Percent is between 0 and 1
if 0 < self.task.percent_done < 1:
status = "Working"
self.label_dots += 1
self.label_dots = self.label_dots % 4
else:
status = "Finished"
self.label_dots = 0
self.prog_bar.configure(value=self.task.percent_done * 100)
label_text = "Status: - " + status + ("." * self.label_dots)
self.prog_label.config(text = label_text)
if status != "Finished":
self.root.after(1000, self.update_ui)
Application().root.mainloop()