如何在按下后更改按钮的bg颜色并返回到先前的颜色 [英] how to change bg color of button after pressing and get back to previous color

问题描述

在下面的程序中，我想在按下按钮后将按钮的背景色更改为绿色，并且更改后的颜色应保留2秒钟，然后再更改回原始颜色.有办法吗?

In the below program i want to change the background color of the button to green after pressing it and changed color should remain for 2seconds and later change back to original color. Is there a way to do?

import tkinter as tk
class MyGui(tk.Tk):
    def __init__(self):
        super(MyGui, self).__init__()
        self.create_widgets()

    def widget_button(self):
        self.frame = tk.Frame(self)
        self.frame.pack()
        self.buttonA = tk.Button(self.frame, padx=13, pady=6, bd=4, text="Sample",bg="black", command=self.trial)

    def trial(self):
        print("Button color is changed to green")

if __name__ == "__main__":
    root = MyGui()
    root.mainloop()

程序中默认颜色为黑色，现在我想在按下后更改为绿色2秒钟

In the program the default color is black now i want to change to green for 2secs after pressing

推荐答案

您可以使用 after 方法来安排函数在预定的时间后运行.您可以使用 configure 方法来更改窗口小部件选项.将这两个放在一起，您将得到以下内容:

You can use the after method to schedule a function to run after a pre-defined amount of time. You can use the configure method to change a widget option. Put those two together and you have something like this:

def trial(self):
    self.buttonA.configure(background="green")
    self.after(2000, lambda: self.buttonA.configure(background="black")

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