Is it possible to bind a mouse event to a tab of a notebook?

问题

I'm using the notebook from tkinter.
And I need to close a tab when I'm doing a right click on it.
But I can't find a way to handle any event on it. So I hope that someone can help me. I just need an example, so if you need anything(code, etc) ask me.

回答1:

You can bind() event <Button-3> (right button) to notebook with function which will close selected tab.

 nb = ttk.Notebook(root)
 nb.bind('<Button-3>', on_click)

Problem is how to recognize clicked tab because tkinter sends only x, y.

Tcl/Tk has function indentity tab x y to convert x, y to tab index. But tkinter doesn't have it. You have to call Tcl command:

 clicked_tab = nb.tk.call(nb._w, "identify", "tab", x, y)

and now you can use this index to close tab.

(you can see similar command indentify in ttk.py file)

Simple working example

import tkinter as tk
from tkinter import ttk

# --- functions ---

def on_click(event):
    print('widget:', event.widget)
    print('x:', event.x)
    print('y:', event.y)

    #selected = nb.identify(event.x, event.y)
    #print('selected:', selected) # it's not usefull

    clicked_tab = nb.tk.call(nb._w, "identify", "tab", event.x, event.y)
    print('clicked tab:', clicked_tab)

    active_tab = nb.index(nb.select())
    print(' active tab:', active_tab)

    if clicked_tab == active_tab:
        nb.forget(clicked_tab)

# --- main ---

root = tk.Tk()

# create notebook
nb = ttk.Notebook(root)
nb.pack(fill='both')

# bind function to notebook
nb.bind('<Button-3>', on_click)    

# add some tabs
for char in "ABCDEF":
    nb.add(tk.Label(nb, text=(char*15)), text=char*3)

root.mainloop()

If you remove if clicked_tab == active_tab: then you could close every tab, not only active.

来源：https://stackoverflow.com/questions/40828166/is-it-possible-to-bind-a-mouse-event-to-a-tab-of-a-notebook

标签

python

events

tkinter

tabs