Python / tkinter: Binding right button click in an array of widgets

Question

I am rendering an array of buttons onto the screen and want to implement a right-click function. I have left click working with the default "command=" option on the widget, but for some reason, I can't seem to get the button bind to kick in. My code looks like this:

for key, value in sorted_widget_properties:
    if key not in self._filter_list:
        continue
    colour = value[appearance_mode_index]
    if row > 18:
        offset = 4
        row = 1

    # Light mode colours
    if row == 1:
        pad_y = (10, 0)
    else:
        pad_y = 5
    lbl_property = ctk.CTkLabel(master=widget_frame, text=' ' + key)
    lbl_property.grid(row=row, column=1 + offset, sticky='w', pady=pad_y)
    btn_property = ctk.CTkButton(master=widget_frame,
                                 border_width=1,
                                 fg_color=colour,
                                 width=button_width,
                                 height=button_height,
                                 text='',
                                 command=lambda widget_property=key: self.colour_picker(widget_property),
                                 corner_radius=3)
    btn_property.grid(row=row, column=0 + offset, padx=5, pady=pad_y)
    self.widgets[key] = {"widget": btn_property, "button": btn_property, "colour": colour,
                         'label': lbl_property}
    # Set a binding so that we can paste a colour, previously copied into our clipboard
    self.widgets[key]['widget'].bind("<Button-3>",
                                     lambda widget_property=key: self._paste_colour(widget_property))
    row += 1

I have a print statement in the _paste_colour class method, and it appears that the function is never called and nothing is ever printed:

def _paste_colour(self, widget_property):
    print('PASTE COLOUR!"')
    new_colour = pyperclip.paste()
    if len(new_colour) != 7:
        self._status_bar.set_status_text(status_text='Attempt to paste a bad colour code - ignored.')
    self._set_widget_colour(widget_property=widget_property, new_colour=new_colour)
    self._status_bar.set_status_text(
        status_text=f'Colour {new_colour} assigned to widget property {widget_property}.')

Please edit your question to include a minimal reproducible example, preferably one that doesn't rely on customtk, unless customtk is literally causing the problem. — Bryan Oakley
– Bryan Oakley, Commented Sep 23, 2022 at 14:04
You need to bind event on self.widgets[key]['widget'].canvas instead. — acw1668
– acw1668, Commented Sep 23, 2022 at 15:58

Nimantha · Accepted Answer · 2025-07-09 02:04:54Z

0

It might be that you are just missing an event parameter.

import tkinter as tk

root = tk.Tk()
root.geometry("200x200")
widget_frame = tk.Frame(root).grid(row=1, column=1)


def right_click(x):
    print('right clicked')
    print(x)

def left_click():
    print('left clicked')


lbl_property = tk.Label(master=widget_frame, text='Label')
lbl_property.grid(row=0, column=0, sticky='w')
btn_property = tk.Button(master=widget_frame,
                             text='button',
                             command=left_click
                             )
btn_property.grid(row=0, column=1, padx=5, pady=5)
param='some parameter'
btn_property.bind("<Button-3>", lambda event, x=param: right_click(x))

root.mainloop()

edited Jul 9 at 2:04

Nimantha

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answered Sep 23, 2022 at 14:22

steTATO

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1 Comment

avalon20 Over a year ago

OK point taken and I should have known better. Based on your example. It appears to be a problem with customtkinter.

Nimantha · Accepted Answer · 2025-07-09 02:06:33Z

0

Taking the above example and replacing with a customtkinter widget. I have reproduced the problem:

import tkinter as tk
import customtkinter as ctk

root = tk.Tk()
root.geometry("200x200")
widget_frame = tk.Frame(root).grid(row=1, column=1)


def right_click(x):
    print('right clicked')
    print(x)

def left_click():
    print('left clicked')


lbl_property = tk.Label(master=widget_frame, text='Label')
lbl_property.grid(row=0, column=0, sticky='w')
btn_property = ctk.CTkButton(master=widget_frame,
                             text='button',
                             command=left_click
                             )
btn_property.grid(row=0, column=1, padx=5, pady=5)
param='some parameter'
btn_property.bind("<Button-3>", lambda event, x=param: right_click(x))

root.mainloop()

Running the above, masks out the right click binding. No errors, just doesn't work.

I'll raise the issue on GitHub on the customtkinter forum.

edited Jul 9 at 2:06

Nimantha

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answered Sep 24, 2022 at 9:13

avalon20

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1 Comment

avalon20 Over a year ago

This did indeed turn out to be a CustomTkinter issue. The issue is now fixed in CustomTkinter version 5.

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