您如何编码按钮,按下按钮后它会更改其图像,但是3秒钟后它会变回其正常状态?
我设法通过单击来更改按钮图像,但是函数sleep()
停止了整个Tkinter Mainloop,这导致按钮不执行任何操作。
答案 0 :(得分:1)
如上所述,您需要执行另一个将图像改回原位的功能。然后,您可以使用after方法安排该函数在以后运行。这将是使用Button子类创建结合了这些功能和图像数据的Button自定义类型的理想场所。像这样:
import tkinter as tk
class EleckTroniiKz(tk.Button):
"""A new type of Button that shows one image, changes to another image
when clicked, and changes back to the original image after 3 seconds"""
def __init__(self, master=None, image1=None, image2=None, **kwargs):
self.command = kwargs.pop('command', None)
super().__init__(master, **kwargs)
self.image1 = tk.PhotoImage(file=image1)
self.image2 = tk.PhotoImage(file=image2)
self.config(image=self.image1, command=self.on_click)
def on_click(self):
self.config(image=self.image2)
if self.command: self.command()
# schedule the after_click function to run 3 seconds from now
self.after(3000, self.after_click)
def after_click(self):
self.config(image=self.image1)
### test / demo
def main():
root = tk.Tk()
btn = EleckTroniiKz(root, 'OFF.gif', 'ON.gif')
btn.pack()
root.mainloop()
if __name__ == '__main__':
main()