tkinter toggle buttons not working

[deanhystad]

The way I used grid was a hack to make the code look more like the guizero code. Had I started with tkinter I would probably have the button helper function set the grid position and set any padding.

import tkinter as tk
  
path = ""
  
class RelayButton(tk.Button):
    """A button that toggles a relay"""
    def __init__(self, parent, url="", on_image=None, off_image=None, **kwargs):
        super().__init__(parent, image=off_image, command=self.toggle)
        self.url = url
        self._on = False
        self.on_image = on_image
        self.off_image = off_image
  
    @property
    def on(self):
        """Return state of the relay"""
        return self._on
  
    @on.setter
    def on(self, on):
        """Set state of the relay"""
        self._on = on
        if on:
            # requests.post(f"{self.url}cm?cmnd=Power On")
            self["image"] = self.on_image
        else:
            # requests.post(f"{self.url}cm?cmnd=Power Off")
            self["image"] = self.off_image
   
    def toggle(self):
        """Toggle state of the relay"""
        self.on = not self.on
  
def new_button(name, url, parent, row, column, **kwargs):
    """Convenience functon that creates a RelayButton"""
    on_image = tk.PhotoImage(file=f"{path}{name}_on.png")
    off_image = tk.PhotoImage(file=f"{path}{name}_off.png")
    button = RelayButton(parent, url, on_image, off_image, **kwargs)
    button.grid(row=row, column=column, padx=5)
    return button
  
def main():
    app = tk.Tk()
    buttons = [
        new_button('living_room', "http://192.168.0.101/", app, 0, 0),
        new_button('kitchen', "http://192.168.0.113/", app, 0, 1))
    ]
    for b in buttons:
        b.on = False
    app.mainloop()
   
if __name__ == "__main__":
  main()