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我正在尝试通过单选按钮更新 TopLevel 小部件的背景颜色。我想要的是在用户更改单选按钮时更改背景颜色。目前，该程序会打开一个带有单选按钮的新窗口。背景颜色完全没有变化。

from tkinter import *

class Example:

    def newWindow(self):
        top = Toplevel()
        v = IntVar()
        v.set(-1)
        self.aRadioButton = Radiobutton(top, text="Blue",variable = v, value = 0)
        self.aRadioButton.grid(row=1, column=1)
        self.aRadioButton = Radiobutton(top, text="Red",variable = v, value = 1)
        self.aRadioButton.grid(row=1, column=0)

        if v == 0:
            top.configure(bg="Blue")
        elif v == 1:
            top.configure(bg="Red")


    def __init__(self, master):
        frame = Frame(master, width = 50, height = 50)
        frame.grid()

        self.aLabel = Label(frame, text = "New window bg colour").grid(row=0)

        self.aButton = Button(frame, text="To new window", command=self.newWindow)
        self.aButton.grid(row=1)

root = Tk()
app = Example(root)
root.mainloop()
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1 回答 1

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当您更改单选按钮时，您必须使用一个事件。将命令方法附加到单选按钮，如下所示：

self.aRadioButton = Radiobutton(top, text="Blue",variable = v, value = 0, command=lambda: top.configure(bg="Blue"))
self.aRadioButton = Radiobutton(top, text="Red",variable = v, value = 1, command=lambda: top.configure(bg="Red"))

v同样，当您这样做时，如果您仅将其用于此目的，则不需要该变量。

于 2013-03-29T16:08:48.300 回答