title: Buttons have their own coordinate system according to the "grid_location" method?
body: <p>I'm trying to use the <code>grid_location</code> method, from the <em>Grid Geometry Manager</em>, in Tkinter, but it seems that I'm doing something wrong. </p>
  
  <p>Here's my code:</p>
  
  <pre><code>from tkinter import * 
  
  
  root = Tk()
  
  b=Button(root, text="00")
  b.grid(row=0, column=0)
  b2=Button(root, text="11")
  b2.grid(row=1, column=1)
  b3=Button(root, text="22")
  b3.grid(row=2, column=2)
  b4=Button(root, text="33")
  b4.grid(row=3, column=3)
  b5=Button(root, text="44")
  b5.grid(row=4, column=4)
  
  def mouse(event):
      print(event.x, event.y)
      print(root.grid_location(event.x, event.y))
  
  root.bind("&lt;Button-1&gt;", mouse)
  
  root.mainloop()
  </code></pre>
  
  <p>When I click outside the Buttons, it works, but when I click inside of any Button, it seems that each button has its own coordinate system. So, each button is on the (0, 0) cell, despite that in the code, they are on a regular grid.</p>