使用tkinter为Python程序创建UI可以多次按下Tkinter中的按钮如何创建“一个进程”弹出窗口？

问题描述

这是我尝试的简单用户界面...

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

此处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，在单击停止按钮后，如何将启动计数器的单击次数重置为该计数器。这是一个循环程序，这就是我有一个停止按钮的原因。任何帮助，不胜感激！

解决方法

您可以通过更改按钮的状态来禁用按钮。禁用后，无法单击该按钮。

# 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'