Is it possible to draw a BUTTON?

[MRAB]

On 2016-07-28 00:13, huey.y.jiang at gmail.com wrote:
> On Wednesday, July 27, 2016 at 4:18:29 PM UTC-4, huey.y... at gmail.com wrote:
>> Hi Folks,
>>
>> It is common to put a BUTTON on a canvas by the means of coding. However, in my application, I need to draw a circle on canvas, and then make this circle to work as if it is a button. When the circle is clicked, it triggers a new image to be displayed. Somebody can help? Thanks!
>
> ---> By the way, the GUI is TK.
>
Here's a simple example:


#! python3.5
# -*- coding: utf-8 -*-
import tkinter as tk

def mouse_clicked(event):
     dist_sq = (event.x - circle['x']) ** 2 + (event.y - circle['y']) ** 2

     if dist_sq <= circle['radius'] ** 2:
         print('Clicked inside circle')

root = tk.Tk()

canvas = tk.Canvas(root, width=400, height=200)
canvas.pack()

circle = dict(x=60, y=60, radius=20)

left = circle['x'] - circle['radius']
top = circle['y'] - circle['radius']
right = circle['x'] + circle['radius']
bottom = circle['y'] + circle['radius']

canvas.create_oval((left, top, right, bottom), outline='red', fill='red')
canvas.bind('<Button-1>', mouse_clicked)

root.mainloop()