我有一個程序在畫布中放置復選按鈕，當選項(另一個復選按鈕)被選中時。我有另一個選項(另一個復選按鈕)來畫線。為了畫線，首先我應該選擇checkbutton“draw a line”，然后單擊放置在畫布中的任何checkbutton，另一個單擊畫布上的任何地方。這個工作與我放置的第一個復選按鈕，但如果我放置了幾個復選按鈕，它只從畫布中的最后一個復選按鈕的地方畫線，而不從我選擇的檢查點畫線。我相信我應該創建一個字典來記錄我放置的復選按鈕，這樣我就可以回調它們了，但是我不知道如何實現它，有什么想法嗎？from tkinter import *

root = Tk()

top_canvas = Canvas(root,width=1376,height=768, bg='light blue')

top_canvas.pack()

buttons = []

class CMD: #Auxilliary function for callbacks using parameters. Syntax: CMD(function, argument1, argument2, ...)

def __init__(s1, func, *args):

s1.func = func

s1.args = args

def __call__(s1, *args):

args = s1.args+args

s1.func(*args)

def color_checkbutton(pos): # define the colors of the checkbutton

checkbutton_available()

if buttons[pos][0].get() == 1:

buttons[pos][2].configure(bg='red')

else:

buttons[pos][2].configure(bg='green')

def place_checkbutton_in_canvas(e): # order to insert the checkbutton

if len(str(e.widget))<12: ## Don't place a new one if a checkbox was clicked

b = IntVar()

pos = len(buttons)

global xx, yy

xx = e.x

yy = e.y

buttons.append([b,pos, Checkbutton(top_canvas, variable=b, textvariable=b, command=CMD(color_checkbutton, pos))])

buttons[-1][2].place(x=xx, y=yy)

color_checkbutton(pos)

def place_checkbutton(): #to run when checkbutton is selected. Now the checkbutton will be placed where mouse clicked if choose_line is selected

top_canvas.bind('', place_checkbutton_in_canvas)

def checkbutton_available():

def drawline(ev):

flx = ev.x

fly = ev.y

def auxiliary():

lineor = top_canvas.create_line(xx, yy, flx, fly, width =3, fill = 'red')

auxiliary()

if chosen_option.get() == 2:

top_canvas.bind('', drawline)

chosen_option = IntVar()

choose_checkbutton = Radiobutton(top_canvas, text = "place checkbutton", variable=chosen_option, value = 1, command = place_checkbutton)

choose_checkbutton.place(x=10, y=10)

choose_line = Radiobutton(top_canvas, text = "draw line", variable=chosen_option, value = 2)

choose_line.place(x=10, y=100)

top_canvas.bind('', place_checkbutton_in_canvas)

root.mainloop()

總結

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