Tkinter 错误的 # 坐标：预期为 0 或 4，得到 5

Question

我试图在 mycar(x1) 的坐标中找到，但它是错误的，我试图找到解决方案，但我无法理解。有人可以向我解释吗？谢谢

from tkinter import *
import tkinter as tk

class Example(tk.Frame):
    def __init__(self,parent):
        tk.Frame.__init__(self)

        #create a canvas
        self.canvas = tk.Canvas(width=600, height=250)
        self.canvas.pack()
        self.road()
        self.crossing()

    def road(self):
        self.canvas.create_line(50, 50, 450, 50)
        self.canvas.create_line(50, 100, 450, 100)

    def crossing(self):
        self.canvas.create_line(350, 50, 350, 100)
        self.canvas.create_line(375, 50, 375, 100)


class Car:
    def __init__(self, x1, y1, x2, y2, vx, vy, color, example):
        self.x1 = x1
        self.y1 = y1
        self.x2 = x2
        self.y2 = y2
        self.vx = vx
        self.vy = vy
        self.color = color
        self.example = example

    def drawit(self, x1, y1, x2, y2, color):
        self.example.canvas.create_rectangle(x1, y1, x2, y2, color)

    def moveit(self, vx, vy):
        self.example.canvas.move(vx, vy)

if __name__ == "__main__":
    root = tk.Tk()
    my_canvas = Example(root)
    my_canvas.pack(fill="both", expand=True)
    mycar = Car(60, 60, 125, 90, 3, 0, "red", my_canvas)
    mycar.drawit(60, 60, 125, 90, "red")
    mycar.moveit(3, 0)
    print (mycar.x1)
    root.mainloop ()

错误信息

 Traceback (most recent call last):   File
 "D:/Users/USER/PycharmProjects/untitled/2001.py", line 55, in <module>
     mycar.drawit(60, 60, 125, 90, "red")   File "D:/Users/USER/PycharmProjects/untitled/2001.py", line 45, in drawit
     self.example.canvas.create_rectangle(x1, y1, x2, y2, color)   File "D:\Users\USER\AppData\Local\Programs\Python\Python36-32\lib\tkinter\__init__.py",
 line 2495, in create_rectangle
     return self._create('rectangle', args, kw)   File "D:\Users\USER\AppData\Local\Programs\Python\Python36-32\lib\tkinter\__init__.py",
 line 2474, in _create
     *(args + self._options(cnf, kw))))
 _tkinter.TclError: wrong # coordinates: expected 0 or 4, got 5

Answer 1

create_rectangle 采用 4 个位置参数 (x1,y1,x2,y2)，然后是一组 key-value 对选项。

你需要这样的东西：

self.example.canvas.create_rectangle(x1, y1, x2, y2, fill=color)

Tkinter 错误的 # 坐标：预期为 0 或 4，得到 5

Tkinter wrong # coordinates: expected 0 or 4, got 5

python

tkinter

tkinter-canvas