tkinter 中按钮的两种不同的活动背景颜色

Question

Hello so I'm learning tkinter in python 3.10.5 and so take a look at this and I'll explain

from tkinter import*
window=Tk()
window.geometry('400x400')
window.resizable(width=False,height=False)
def txt():
    btn.config(text='test')
btn=Button(window,text='',activebackground=('crimson' if btn else 'lime'),command=txt)
btn.pack(expand=True,fill=BOTH)

window.mainloop()

so I have a button that takes the whole window and I want to write in activebackground part that if the button has no text in it activebackground color would be crimson otherwise lime. how to do that?

Answer 1

Set activebackground within btn.config method and use if... else to toggle. Eg:

from tkinter import*
window=Tk()
window.geometry('400x400')
window.resizable(width=False,height=False)

def txt():
    if btn['text'] == '':
        btn.config(text='test', activebackground='lime')
    else:
        btn.config(text='', activebackground='crimson')
    
btn=Button(window,text='',activebackground='crimson', command=txt)
btn.pack(expand=True,fill=BOTH)

window.mainloop()