【问题标题】:Creating a UI for Python Program using tkinter. The button in Tkinter can be pressed multiple times. How can I create a "One Process" Pop Up?使用 tkinter 为 Python 程序创建 UI。 Tkinter 中的按钮可以多次按下。如何创建“一个进程”弹出窗口?
【发布时间】:2020-08-30 05:45:59
【问题描述】:

这是我尝试的简单 UI...

import tkinter as ttk
import subprocess
import sys
import time
import os
import tkinter.font as font
from tkinter import messagebox
from tkinter.ttk import *

app = ttk.Tk()

app.geometry("400x400")
app.configure(bg='gray')

photo = ttk.PhotoImage(file=r"C:\Users\ex\ex_button_active.png")
myFont = font.Font(family='Helvetica', size=20, weight='normal')

ttk.Label(app, text='Ex', bg='gray', font=(
    'Verdana', 15)).pack(side=ttk.TOP, pady=10)
app.iconbitmap(r'C:\Users\ex\ex_icon.ico')


def ex_activation():
    global pro
    print("Running program!")
    pro = subprocess.Popen("python programex.py", shell=True)


def ex_stop():
    global pro
    print("Stopping Program... Please Wait!")
    os.kill(pro.pid, 0)


ex_activation_button = ttk.Button(app, bg='black', image=photo, width=120, height=120, command=ex_activation)
ex_activation_button += 1
if ex_activation_button < 1:
    messagebox.showinfo("showinfo", "In Order to Run Again, Press ""Stop Program""")

ex_stop_button = ttk.Button(app, bg='Gray', text='Stop Program', width=12, command=ex_stop, height=3)

ex_stop_button['font'] = myFont

app.title("Ex")
ex_activation_button.pack(side=ttk.TOP)
ex_stop_button.pack(side=ttk.LEFT)

# app.mainloop()
while True:
    try:
        app.update()
        app.update_idletasks()
    except KeyboardInterrupt:
        pass

这里的目标是在多次单击按钮时添加“仅一个进程”警告。真正的问题是如何在单击停止按钮后重置此计数器的单击开始按钮的次数。这是一个循环程序,这就是我有一个停止按钮的原因。非常感谢任何帮助!

【问题讨论】:

    标签: python python-3.x button tkinter messagebox


    【解决方案1】:

    您可以通过更改按钮的状态来禁用按钮。禁用后,按钮无法点击。

    # disable a button:
    ex_activation_button['state'] = 'disabled'
    
    # re-enable the button:
    ex_activation_button['state'] = 'normal'
    
    
    
    # here is the change you need to add:
    def ex_activation():
        global pro
        print("Running program!")
        ex_activation_button['state'] = 'disabled'
        pro = subprocess.Popen("python programex.py", shell=True)
    
    def ex_stop():
        global pro
        print("Stopping Program... Please Wait!")
        os.kill(pro.pid, 0)
        ex_activation_button['state'] = 'normal'
    

    【讨论】:

    • 嘿!感谢您的回答。问题是我希望按钮在按下停止按钮后再次工作。这可能吗?
    • @RedgarPro 是的,有可能,您可以在停止按钮命令函数ex_stop 中使用ex_activation_button['state'] = 'normal'
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