取消选择 tkinter 画布按钮

Question

我有一个由 tkinter canvas 按钮创建的按钮，我绑定它，以便当我按下它时它会给我一个"下沉"效果和一个值。但是我想给它另一种效果，以便当我再次按下它时，它会恢复正常，即"平坦"。

def press(canvas1, y):
canvas1.configure(relief="sunken")
print(y)
canvas = tk.Canvas(root, width=50, height=20, borderwidth=1)
buttonBG1 = canvas.create_rectangle(0, 0, 50, 20, outline="", activefill="#F1F1F1")
buttonTXT1 = canvas.create_text((25, 10), text="button", font=("Calibri", 8))
canvas.tag_bind(buttonBG1, "<ButtonPress-1>", lambda x: press(canvas, 100))
canvas.tag_bind(buttonTXT1, "<ButtonPress-1>", lambda x: press(canvas, 100))

当我第二次按下按钮时，他们的一种方法，就像释放的效果，但我想按下释放。

Answer 1

您可以切换按钮方面的值; 在这里，我们使用闭包来跟踪状态的状态。

import tkinter as tk

def press(canvas1, y, toggle=('sunken', 'flat'), _turn=[0]):
canvas1.configure(relief=toggle[_turn[0]])
_turn[0] = (_turn[0] + 1) % 2
print(y)

if __name__ == '__main__':

root = tk.Tk()
canvas = tk.Canvas(root, width=50, height=20, borderwidth=1)
canvas.pack(expand=True, fill=tk.BOTH)
buttonBG1 = canvas.create_rectangle(0, 0, 50, 20, outline="", activefill="#F1F1F1")
buttonTXT1 = canvas.create_text((25, 10), text="button", font=("Calibri", 8))
canvas.tag_bind(buttonBG1, "<ButtonPress-1>", lambda x: press(canvas, 100))
canvas.tag_bind(buttonTXT1, "<ButtonPress-1>", lambda x: press(canvas, 100))
root.mainloop()