I don't understand why I see that the width of the entry(I gave: 146 pixels) is bigger then win-CodePudding

I encountered something I don't understand. I could assume it is a different measurement but I can't find any information about it.

I don't understand why I see that the width of the entry(I gave: 146 pixels) is bigger then windows width(I gave 420 pixels ) ? Increase the width of the window with the cursor and you will see that it is much wider than the window itself. Can you explain it ? How can this be controlled?

from tkinter import *

win = Tk()

win.geometry("465x420")


entry1 = Entry(win, background="white", width=146)
entry1.grid(row=1, column=1, ipadx=0)

win.mainloop()

CodePudding user response：

Try this, with the default font of Tkinter I divide the window size by 8 and round it.

from tkinter import *

win = Tk()

win.geometry("465x420")



entry1 = Entry(win, background="white")
entry1.grid(row=1, column=1, ipadx=0)


win.bind("<Configure>", lambda e: entry1.configure(width=round(e.width/8)))

win.mainloop()

CodePudding user response：

tkinter has w.winfo_width to find the width of a widget.

import tkinter as tk
from tkinter import ttk

root = tk.Tk()

entry10 = tk.Entry( root, width = 10 )
entry20 = tk.Entry( root, width = 20 )

entry10.grid()
entry20.grid()

ttkentry10 = ttk.Entry( root, width = 10 )
ttkentry20 = ttk.Entry( root, width = 20 )

ttkentry10.grid()
ttkentry20.grid()


def on_click():
    print( '10: ', entry10.winfo_width(), '20: ', entry20.winfo_width() )
    print( 'ttk 10: ', ttkentry10.winfo_width(), 
           'ttk 20: ', ttkentry20.winfo_width() )

ttk.Button( root, text = 'Click', command = on_click ).grid()

root.mainloop()

Results from click:

    10:  102     20:  192
ttk 10:  104  ttk20:  194

On my Mac this gives 9 pixels per character 12 pixels for a tk.Entry and 9 pixels per character 14 pixels for a ttk.Entry with the default font.