Python，Tkinter - 仅在选择单选按钮时启用/禁用按钮答案

【问题标题】：Python, Tkinter - Enable/Disable buttons only when a radio button is selectedPython，Tkinter - 仅在选择单选按钮时启用/禁用按钮
【发布时间】：2022-08-14 09:42:57
【问题描述】：

所以这里是我的代码

root = Tk()

# 1st frame
frame_1 = LabelFrame(root)
frame_1.pack()

#var
var = IntVar()
var.set(0)
test = [\'test1\', \'test2\', \'test3\', \'test4\']

# radio button
radio_1 = Radiobutton(frame_1, text = test[0], value = 1, variable = var)
radio_1.pack()
radio_2 = Radiobutton(frame_1, text = test[1], value = 2, variable = var)
radio_2.pack()
radio_3 = Radiobutton(frame_1, text = test[2], value = 3, variable = var)
radio_3.pack()

# 2nd frame
frame_2 = LabelFrame(root)
frame_2.pack()

# buttons
button_1 = Button(frame_2, text =  test[0], state = DISABLED)
button_1.pack()
button_2 = Button(frame_2, text =  test[1], state = DISABLED)
button_2.pack()
button_3 = Button(frame_2, text =  test[2], state = DISABLED)
button_3.pack()
button_4 = Button(frame_2, text =  test[3], state = DISABLED)
button_4.pack()

root.mainloop()

我试图做的是在选择单选按钮时启用按钮。这是我尝试过的。

def changeState():
    if var.get() != 0:
       button_1[\'state\'] = NORMAL
       button_2[\'state\'] = NORMAL
       button_3[\'state\'] = NORMAL
       button_4[\'state\'] = NORMAL

changeState()

我相信这只是最初设置它，当我选择一个单选按钮或更改它时，它不会更新。我想我可以在按钮内使用命令，但不明白如何去做。

标签： python tkinter button radio-button

【解决方案1】：

我添加了四个函数。然后在Radiobutton 中，我为每个Radiobuuton 添加了command=changeState。

尝试这个：

from tkinter import *

root = Tk()

# 1st frame
frame_1 = LabelFrame(root)
frame_1.pack()

#var
var = IntVar()
var.set(0)
test = ['test1', 'test2', 'test3', 'test4']

def changeState1():
    if var.get() !=0:
       button_1['state'] = NORMAL
       button_2['state'] = DISABLED
       button_3['state'] = DISABLED
       button_4['state'] = DISABLED

def changeState2():
    if var.get() !=0:
       button_1['state'] = DISABLED
       button_2['state'] = NORMAL
       button_3['state'] = DISABLED
       button_4['state'] = DISABLED       


def changeState3():
    if var.get() !=0:
       button_1['state'] = DISABLED
       button_2['state'] = DISABLED
       button_3['state'] = NORMAL
       button_4['state'] = DISABLED

def changeState4():
    if var.get() !=0:
       button_1['state'] = DISABLED
       button_2['state'] = DISABLED
       button_3['state'] = DISABLED
       button_4['state'] = NORMAL      
       
# radio button
radio_1 = Radiobutton(frame_1, text = test[0], value = 1,command=changeState1, variable = var)
radio_1.pack()
radio_2 = Radiobutton(frame_1, text = test[1], value = 2, command=changeState2, variable = var)
radio_2.pack()
radio_3 = Radiobutton(frame_1, text = test[2], value = 3,command=changeState3, variable = var)
radio_3.pack()
radio_4= Radiobutton(frame_1, text = test[2], value = 3,command=changeState4, variable = var)
radio_4.pack()

# 2nd frame
frame_2 = LabelFrame(root)
frame_2.pack()

# buttons
button_1 = Button(frame_2, text =  test[0],  state = DISABLED)
button_1.pack()
button_2 = Button(frame_2, text =  test[1], state = DISABLED)
button_2.pack()
button_3 = Button(frame_2, text =  test[2], state = DISABLED)
button_3.pack()
button_4 = Button(frame_2, text =  test[3], state = DISABLED)
button_4.pack()
  
root.mainloop()
changeState()

【讨论】：

谢谢，我从查看您的代码中发现我做错了什么。我在命令中的函数名称后面有括号，虽然它没有给我任何错误，但它无法实现我想要的。