Tkinter如何通过选中复选框来锁定文本小部件？答案

【问题标题】：Tkinter how to lock Text widget by checking checkbox?Tkinter如何通过选中复选框来锁定文本小部件？
【发布时间】：2020-12-05 05:14:54
【问题描述】：

我是编程和 Tkinter 的新手。我想在按下复选框时 DISABLED 文本框并在未选中框时打开它 NORMAL。这是我的代码：

from tkinter import *

root = Tk()

def lock_fields():
    if check == True:
        data.configure(state=DISABLED)
    if check == False:
        data.configure(state=NORMAL)

check = BooleanVar()
open_for_edit = Checkbutton(root, text="check the box for editing", variable=check, 
                            onvalue=True, offvalue=False, command=lambda: lock_fields())
open_for_edit.pack()
check = check.get()

data = Text(root)
data.insert(END, "I would like to be able to edit this text only when checkbox is checked.")
data.pack()

root.mainloop()

似乎由于某种原因检查变量在进入lock_fields 函数时始终为False。我尝试将检查参数传递给该方法。

【问题讨论】：

标签： python tkinter checkbox boolean

【解决方案1】：

你已经很接近了，唯一的问题是check.get() 行必须在函数中。你也不需要 lambda。试试这个：

from tkinter import *

root = Tk()

def lock_fields():
    if check.get():
        data.configure(state=DISABLED)
    else:
        data.configure(state=NORMAL)

check = BooleanVar()
open_for_edit = Checkbutton(root, text="check the box for editing", variable=check, onvalue=True, offvalue=False, command=lock_fields)
open_for_edit.pack()

data = Text(root)
data.insert(END, "I would like to be able to edit this text only when checkbox is checked.")
data.pack()

root.mainloop()

【讨论】：