On 2016-07-28 00:13, huey.y.ji...@gmail.com wrote:
On Wednesday, July 27, 2016 at 4:18:29 PM UTC-4, huey.y...@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()
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