CODEWITHSUNDEEP
pythontkinter
Tom
Tom

Reputation: 1063

Tkinter Combobox dynamically set values

I'm attempting to set the options of a Tkinter Combobox dynamically. My code almost works, and I'm not sure why.

The code is designed to allow typing a string into an Entry box. It then searches through a list for any items that contain that string. So for example, if you type

Mi

into the entry box the list becomes

['Mickey', 'Minnie']

All this works as expected.

The Combobox [values] attribute is supposed to update whenever <FocusIn> is triggered using a function. This does indeed happen, but only after I click on the Combobox twice. I'm not sure why clicking on it the first time doesn't trigger the <FocusIn> binding. Is this the wrong binding? Is there something about my lambda function that isn't quite right? Would love some help!

Code:

from tkinter import *
from tkinter import ttk

init_list = ['Mickey', 'Minnie', 'Donald', 'Pluto', 'Goofy']

def db_values():
    i = inp_var.get()
    db_list = [x for x in init_list if i in x]
    print(db_list)
    return db_list

def db_refresh(event):
    db['values'] = db_values()

root = Tk()
title_label = Label(root, text="Partial string example")
title_label.grid(column=0, row=0)

inp_var = StringVar()
input_box = Entry(root, textvariable=inp_var)
input_box.grid(column=0, row=1)

name_selected = StringVar()
db = ttk.Combobox(root, textvariable=name_selected)
db['values'] = db_values()
db.bind('<FocusIn>', lambda event: db_refresh(event))
db.grid(column=0, row=2, sticky=EW, columnspan=3, padx=5, pady=2)

root.mainloop()

Upvotes: 1

Views: 9400

Answers (2)

Moaz Alaa
Moaz Alaa

Reputation: 1

from turtle import * reset() speed(1) bgcolor("white") title("Intersecting Triangle and Square") setpos(0,0) def draw_triangle(size, fcolor): pensize(size) color('blue',fcolor) begin_fill() for i in range(3): forward(100) left(120) end_fill() def draw_square(size,color): setpos(-20,0) pensize(size) pencolor(color) for i in range(4): forward(140) left(90) def display_name (name,font_size): penup() setpos(50, 90) pendown() color("black") write(name,align='center',font=("arial",font_size)) draw_triangle(3,'orange') draw_square(3,'brown') display_name('moaz',15) ht()#hide the turtle

Upvotes: -1

chandi-mptk
chandi-mptk

Reputation: 50

def db_values():
    i = inp_var.get()
    db_list = [x for x in init_list if i in x]
    print(db_list)
    db['values'] = db_values()

Only this small Change is requires. list value must be assigned in the function itself.

Upvotes: 2

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