Question

我试图让按钮改变颜色让用户知道他们按下了按钮。我已经看到过这样的其他问题，但没有一个问题有帮助。我在编码方面很陌生，但一直在阅读有关tkinter及其所有模块的指导书。但我无法改变它的颜色

from tkinter import *
import os
import time


class Window(Frame):

def __init__(self, master=None):
    Frame.__init__(self, master)
    self.master = master
    self.init_window()
    self.master.title("Conversion System")

def init_window(self):
    self.pack(fill=BOTH, expand=1)
    menu = Menu(self.master)
    self.master.config(menu=menu)
    file = Menu(menu)
    file.add_command(label="Exit", command=self.client_close)
    menu.add_cascade(label="File", menu=file)

    conversionTab = Menu(menu)
    menu.add_cascade(label="Conversions", menu=conversionTab)
    conversionTab.add_checkbutton(label="Binary To Denary", command=self.binary2denary)
    conversionTab.add_checkbutton(label="Hexadecimal to Denary", command=self.binary2denary)
    conversionTab.add_command(label="System Info", command=self.SystemInfo)


    # creating a button instance
    userChoice  = Label(text="Chose a converter!")
    userChoice.pack(padx=0, pady=0, side=TOP)
    b2dButton = Button(self, text="Binary to Denary", bg="white", fg="black", command=self.binary2denary)
    b2dButton.pack(padx=10, pady=5, side=TOP)
    hexaButton = Button(self, text="Hexadecimal to Denary", bg="white", fg="black", command=self.hexa2denary)
    hexaButton.pack(padx=10, pady=5, side=TOP)
    SystemInfo = Button(self, text="System Info", bg="white", fg="black", command=self.SystemInfo)
    SystemInfo.pack(padx=10, pady=5, side=TOP)
    quitButton = Button(self, text="Quit", bg="red", fg="black", command=self.client_close)
    quitButton.pack(padx=5, pady=20, side=BOTTOM)

def SystemInfo(self):
    os.startfile("Code")

def hexa2denary(self):
    print("s")

def binary2denary(self):
    print("s")
    self.Button.configure(bg="Green")

错误代码：

Exception in Tkinter callback
s
Traceback (most recent call last):
  File "C:\Python33\lib\tkinter\__init__.py", line 1442, in __call__
    return self.func(*args)
  File "C:/Users/Robert/Desktop/Robert's Python/Converter/Main.py", line 49, in binary2denary
    self.Button.configure(bg="Green")
AttributeError: 'Window' object has no attribute 'Button'

Answer 1

您没有self.Button但b2dButton要更改颜色
但您必须使用self.b2dButton才能访问所有功能

在init_window()内你需要

self.b2dButton = Button(...)
self.b2dButton.pack

内部方法binary2denary()您需要

self.b2dButton.configure(bg="Green")

BTW：错误消息显示

File "C:/Users/Robert/Desktop/Robert's Python/Converter/Main.py", line 49, in binary2denary
    self.Button.configure(bg="Green")
AttributeError: 'Window' object has no attribute 'Button'

更改tkinter按钮的颜色python 33

1 个答案: