How to specify where a Tkinter window opens?

Question

How can I tell a Tkinter window where to open, based on screen dimensions? I would like it to open in the middle.

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Answer 1

Try this

import tkinter as tk


def center_window(width=300, height=200):
    # get screen width and height
    screen_width = root.winfo_screenwidth()
    screen_height = root.winfo_screenheight()

    # calculate position x and y coordinates
    x = (screen_width/2) - (width/2)
    y = (screen_height/2) - (height/2)
    root.geometry('%dx%d+%d+%d' % (width, height, x, y))


root = tk.Tk()
center_window(500, 400)
root.mainloop()

Source

Answered By: Rachel Gallen

Answer 2

This answer is based on Rachel’s answer. Her code did not work originally, but with some tweaking I was able to fix the mistakes.

import tkinter as tk


root = tk.Tk() # create a Tk root window

w = 800 # width for the Tk root
h = 650 # height for the Tk root

# get screen width and height
ws = root.winfo_screenwidth() # width of the screen
hs = root.winfo_screenheight() # height of the screen

# calculate x and y coordinates for the Tk root window
x = (ws/2) - (w/2)
y = (hs/2) - (h/2)

# set the dimensions of the screen 
# and where it is placed
root.geometry('%dx%d+%d+%d' % (w, h, x, y))

root.mainloop() # starts the mainloop

Answered By: xxmbabanexx

Answer 3

root.geometry('250x150+0+0')

The first two parameters are the width and height of the window. The last two parameters are x and y screen coordinates. You can specify the required x and y coordinates

Answered By: LordDraagon

Answer 4

root.geometry('520x400+350+200')

Explanation: (‘width x height + X coordinate + Y coordinate’)

Answered By: bala subramani

Answer 5

If you would like the window to be centered, this type of function may help you:

def center_window(size, window) :
    window_width = size[0] #Fetches the width you gave as arg. Alternatively window.winfo_width can be used if width is not to be fixed by you.
    window_height = size[1] #Fetches the height you gave as arg. Alternatively window.winfo_height can be used if height is not to be fixed by you.
    window_x = int((window.winfo_screenwidth() / 2) - (window_width / 2)) #Calculates the x for the window to be in the centre
    window_y = int((window.winfo_screenheight() / 2) - (window_height / 2)) #Calculates the y for the window to be in the centre

    window_geometry = str(window_width) + 'x' + str(window_height) + '+' + str(window_x) + '+' + str(window_y) #Creates a geometric string argument
    window.geometry(window_geometry) #Sets the geometry accordingly.
    return

Here, the window.winfo_screenwidth function is used for getting the width of the device screen.
And the window.winfo_screenheight function is used for getting the height of the device screen.

Here you can call this function and pass a tuple with the (width, height) of the screen as the size.

You can customize the calculation as much as you want and it will change accordingly.

Answered By: typedecker

Answer 6

A slight expansion to allow positioning around the screen

def position_window(width=300, height=200, xf = 0.5, yf = 0.5):
    
    # get screen width and height
    screen_width = root.winfo_screenwidth()
    screen_height = root.winfo_screenheight()

    # calculate position x and y coordinates
    x = (screen_width*xf) - (width/2)
    y = (screen_height*yf) - (height/2)

    if x > screen_width-width:
        x  = screen_width-width
    if x < width:
        x = 0.0
    if y > screen_height-height:
        y  = screen_height-height*1.25
    if y < 0:
        y = 0
    root.geometry('%dx%d+%d+%d' % (width, height, x, y))

Answered By: Scott G

How to specify where a Tkinter window opens?

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