Question

无法使用tkinter canva创建圈子

import tkinter

top = tkinter.Tk()
C = tkinter.Canvas(top, bg="black", height=200, width=200)
coord = 50, 50, 150, 150
C.create_circle(coord,fill="blue")
C.pack()

top.mainloop()

错误：

   C.create_circle(coord,start=45,fill="blue")
AttributeError: 'Canvas' object has no attribute 'create_circle'

Answer 1

您不能直接用tkinter画圆，所以“猴子修补”技巧可以为您提供帮助，这是修改后的代码：

import tkinter as tk

top = tk.Tk()

C = tk.Canvas(top, bg="black", height=200, width=200)

C.grid()

def _create_circle(self, x, y, r, **kwargs):
    return self.create_oval(x-r, y-r, x+r, y+r, **kwargs)
tk.Canvas.create_circle = _create_circle

def _create_circle_arc(self, x, y, r, **kwargs):
    if "start" in kwargs and "end" in kwargs:
        kwargs["extent"] = kwargs["end"] - kwargs["start"]
        del kwargs["end"]
    return self.create_arc(x-r, y-r, x+r, y+r, **kwargs)
tk.Canvas.create_circle_arc = _create_circle_arc

C.create_circle(100, 120, 50, fill="blue", outline="#DDD", width=4)
C.create_circle_arc(100, 120, 48, fill="green", outline="", start=45, end=140)
C.create_circle_arc(100, 120, 48, fill="green", outline="", start=275, end=305)
C.create_circle_arc(100, 120, 45, style="arc", outline="white", width=6, start=270-25, end=270+25)
C.create_circle(150, 40, 20, fill="#BBB", outline="")

top.wm_title("Circles and Arcs")
top.mainloop()

您可以检查this answer以获得更多说明

Answer 2

方法的名称是create_oval，而不是create_circle。

无法在画布中创建圆

2 个答案: