如何在tkinter中绘制对角线箭头？

Question

我需要从指向黄色框的蓝色和绿色框绘制两个箭头。我尝试使用 create_line 绘制对角线，但没有用。任何人都可以建议我可以绘制这些箭头的任何方法。使用 create_line 时的错误消息是：AttributeError: '_tkinter.tkapp' object has no attribute 'create_line'

from tkinter import *
import tkinter as tk


window = Tk()
window.geometry("900x500")
window.configure(background='red')
window.title("Theoretical")

label1 = Label(window, text="Hess' cycle of combustion", fg="black", bg="red", font=("Comic Sans MS", 20))
label1.pack()    

text1 = Text(window, width=20, height = 1, bg= "blue")
text1.place(x=200, y=100)

window.create_line(0, 0, 200, 100)
window.create_line(0, 100, 200, 0, fill="white")

text2 = Text(window, width=20, height = 1, bg= "green")
text2.place(x=520, y=100)

text3 = Text(window, width=20, height = 1, bg= "yellow")
text3.place(x=370, y=250)

##    arrow = Label(window, width=13,height = 1, text = "-------------->", bg= "lawn green", font=("Helvetica", 20))
##    arrow.place(x= 330, y=90)

global textbox
textbox = Text(window, width=400, height=10)
textbox.place(x=0, y= 365)

Answer 1

tkinter 线有一个arrow选项；然而，正如 te 评论中指出的那样，create_line是一种Canvas方法：因此，您必须使用tk.Canvas对象来绘制线条：

这个最小示例向您展示了如何：

import tkinter as tk

window = tk.Tk()

canvas = tk.Canvas(window)
canvas.pack()

canvas.create_line(0, 0, 200, 100, arrow=tk.LAST)

window.mainloop()

请注意，为了避免“难以修复”的问题和意外行为，通常建议不要在主命名空间中导入模块（i/e do not from tkinter import *），并且不要混合几何管理器（（i/e do not use .placeand.pack在同一个应用程序中）

编辑：

为了在画布上放置小部件，您必须使用以下Canvas.create_window()方法：

import tkinter as tk

window = tk.Tk()
window.geometry("600x600")

canvas = tk.Canvas(window, width=600, height=600)

label_1 = tk.Label(window, text = "from here", anchor = tk.W)
label_1.configure(width = 10, activebackground = "#33B5E5", relief = tk.FLAT)
label_1_window = canvas.create_window(280, 0, anchor=tk.NW, window=label_1)

label_2 = tk.Label(window, text = "to there", anchor = tk.W)
label_2.configure(width = 10, activebackground = "#33B5E5", relief = tk.FLAT)
label_2_window = canvas.create_window(280, 310, anchor=tk.NW, window=label_2)

canvas.pack()
canvas.create_line(300, 40, 300, 300, arrow=tk.LAST)


window.mainloop()