Re: [Tkinter-discuss] Treeview: stop temporarily TreeviewSelect messages
Hi Vasilis,
On Wed, 31 May 2023 14:44:35 +
Vasilis Vlachoudis wrote:
> during the filling of a ttk.Treeview, widget I want to temporarily
> disable the <> (to restore the previously selected
> items), and re-enable it at the end. However, when I unbind the
> <> event the messages are still send. See the following
> demo code. I would expect that during the filling no <>
> message will be send, however I get hundreds of messages at the end
>
the problem appears to be that the binding is restored before the calls in
the "for" loop in your fill() function are processed. If we add a
strategic update() to your function it seems to work as expected:
def fill(event=None):
t.unbind("<>")
for i in range(1000):
item = t.insert("",tk.END,text=f"Item {i}")
if i&1==0: t.selection_add(item)
t.update()
t.bind("<>", tvselect)
update_idletasks() doesn't seem to be sufficient here.
Have a nice day,
Michael
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[Tkinter-discuss] Treeview: stop temporarily TreeviewSelect messages
Hi all,
during the filling of a ttk.Treeview, widget I want to temporarily disable the
<> (to restore the previously selected items), and re-enable it
at the end.
However, when I unbind the <> event the messages are still
send. See the following demo code. I would expect that during the filling no
<> message will be send, however I get hundreds of messages at
the end
import tkinter as tk
from tkinter import ttk
def tvselect(event):
print("SELECTION CHANGED")
def fill(event=None):
t.unbind("<>")
for i in range(1000):
item = t.insert("",tk.END,text=f"Item {i}")
if i&1==0: t.selection_add(item)
t.bind("<>", tvselect)
if __name__ == "__main__":
root = tk.Tk()
t = ttk.Treeview(root)
t.bind("<>", tvselect)
t.pack(expand=tk.YES,fill=tk.BOTH)
b = tk.Button(root, text="Press me", command=fill)
b.pack()
root.mainloop()
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