如何创建 tkinter 切换按钮? [英] How to create a tkinter toggle button?

问题描述

我一直在使用 Python 2.7 中的 Tkinter 开发文本编辑器.我正在尝试实现的一项功能是夜间模式，用户可以在其中切换黑色背景和浅色背景，只需单击切换按钮即可从浅色切换到深色.

I've been working on a text editor using Tkinter in Python 2.7. A feature that I'm trying to implement is the Night Mode, where the user can toggle between a black background and a light one, that switches from light to dark with a click of the toggle button.

from Tkinter import *

from tkSimpleDialog import askstring

from tkFileDialog   import asksaveasfilename
from tkFileDialog import askopenfilename

from tkMessageBox import askokcancel

Window = Tk() 
Window.title("TekstEDIT")
index = 0

class Editor(ScrolledText):

    Button(frm, text='Night-Mode',  command=self.onNightMode).pack(side=LEFT)

    def onNightMode(self):
    if index:
        self.text.config(font=('courier', 12, 'normal'), background='black', fg='green')

    else:
        self.text.config(font=('courier', 12, 'normal'))

    index = not index   

但是，在运行代码时，它始终处于夜间模式并且切换不起作用.帮助.源代码:http://ideone.com/IVJuxX

However, on running the code, it is always in the night mode and the toggle doesn't work. Help. Source Code: http://ideone.com/IVJuxX

推荐答案

背景和 fg 仅在 if 子句中设置.您还需要在 else 子句中设置它们:

The background and fg are set only in the if-clause. You need to set them also in the else clause:

def onNightMode(self):
    if index:
        self.text.config(font=('courier', 12, 'normal'), background='black', fg='green')

    else:
        self.text.config(font=('courier', 12, 'normal'))

    index = not index

<小时>

即

else:
    self.text.config(font=('courier', 12, 'normal'), background='green', fg='black')

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