How to let tkinter treeview fit your frame

Question

I want my treeview to fully fit the geometry size of my window have defined for my GUI but the display doesn't cover the entire window been display in the middle.

from tkinter import ttk
import tkinter as tk


root = tk.Tk()
root.geometry("1200x680+50+20")


tree = ttk.Treeview(root)
tree.insert("", "0", "item1", text="LANGUAGE")
tree.insert("", "1", "item2", text="GUI")
tree.insert("item1", "0", text="pyhton")

#SUb treeview
style = ttk.Style(root)
style.configure("Treeview", rowheight=70)
tree.configure(style="Treeview")

    ############
tree.config(columns=("NOTE", "book"))   # this creates to seperate headings 
for treeview
tree.column("NOTE", width=300)
tree.heading("NOTE", text="Info")
tree.column("book", width=300)
tree.heading("book", text="profile")


tree.set("item1", "NOTE","Am using python version 3.6.1 \n on windows 
machine")
tree.set("item2","NOTE","This an example Tkinter Treeview in Python, which 
is from \nttk class make sure import ttk\n also from tkinter import *")


tree.pack()
root.mainloop()

I tried to put it in a Frame but that doesn't also display the content for the treeview. This the code

fr = tk.Frame(root, width=1200, height=680, relief="groove") 

tree = ttk.Treeview(fr) 

Solution

Please replace the following line

tree.pack()

with following line

tree.pack(fill='x')

This will use the COMPLETE SPACE of ROOT screen.

Before: After:

Comments

[AD WAN]

@ Fuzed Mass Thanks very much it means by default the pack fills the (y-axis)

[Fuzed Mass]

yes, welcome. please upvote my answer and mark is complete. thanks.

[AD WAN]

so why cant both y and x axis be placed in the pack any reason for that. Asking this because when i change the theme if fills the x axis by default

[Fuzed Mass]

try using: tree.pack(fill='both')

[Russell Smith]

correction: fill=x means it will use the full width of the window, not necessarily the height.

[Russell Smith]

@AD_WAN: not, widgets do not by default fill the y-axis. It may appear that they do, but if you resize the window or add more widgets you'll see that widgets don't automatically fill in either direction. You simply created a widget that was too big to fit, so it looked like it filled in the y axis.

[AD WAN]

@Bryan Oakley: thanks for the hints, but when you call the treeview as toplevel window it doesn't fill the enter window.Have used fill both and fill x any suggestion to do that.

[Russell Smith]

I don't know what you mean by "call the treeview as toplevel window" -- you can't "call" a treeview, and it's not a toplevel window. However, to get it to fill in both directions, use fill='both'.

[AD WAN]

Have created a button which opens the treeview when you click on it,the treeview pops up as a toplevel. Have used the fill="both" it doesn't fill both directions.

[AhammadaliPK]

still not filling with fill="both" and fill="x" any idea?