Can I do 'screenshot' of image on the Python Tkinter Canvas and save it in the file?

Question

I made program to make images in Python tkinter Canvas, but I have no idea how to save images I created. It can be png, gif, anything, but I want to save my work!

This is my code:

import tkinter

from PIL import Image, ImageGrab

paint = tkinter.Tk()
paint.title('paint')
canvas = tkinter.Canvas(paint, width=1100, height=1000, bd=0, highlightthickness=0)
canvas.pack()



def capture(event):
    x0 = canvas.winfo_rootx()
    y0 = canvas.winfo_rooty()
    x1 = x0 + canvas.winfo_width()
    y1 = y0 + canvas.winfo_height()

    im = ImageGrab.grab((100, 0, 1100, 1000))
    im.save('mypic.png')

canvas.mainloop()

I deleted some of my code because it isn't important. But it makes a screenshot without my canvas!

You can find the canvas coordinate and then take a screenshot using `PIL`. — Delrius Euphoria, Mar 17 '21 at 13:19
Thank you for your answer. I will find out about what is PIL. — dominik findeisen, Mar 17 '21 at 14:02
How will `capture()` get triggered, there is no code that calls the function. Why are you passing `(100, 0, 1100, 1000)`, it should be dynamic, so use `(x0, y0, x1, y1)`. — Delrius Euphoria, Mar 18 '21 at 17:15

Delrius Euphoria · Accepted Answer · 2022-03-16T19:54:56.043

4

Since there is no code provided, I will give you an example on how this is done. By default there is no methods within tkinter that does this for you. So for taking screenshots, we will use PIL.

Start by installing PIL:

pip install Pillow

The code is as follows:

from tkinter import *
from PIL import Image, ImageGrab

root = Tk()

def capture():
    x0 = canvas.winfo_rootx()
    y0 = canvas.winfo_rooty()
    x1 = x0 + canvas.winfo_width()
    y1 = y0 + canvas.winfo_height()
    
    im = ImageGrab.grab((x0, y0, x1, y1))
    im.save('mypic.png') # Can also say im.show() to display it

canvas = Canvas(root,bg='red')
canvas.pack(padx=10,pady=10)

e = Entry(root)

canvas.create_window(canvas.canvasx(100),canvas.canvasy(100),window=e)

Button(root,text='Click a pic',command=capture).pack()

root.mainloop()

Nothing too complicated, the coordinates work as follows ImageGrab.grab((left,upper,right,lower)), here is an image that might help you understand the sides better:

Note(as per WinEunuuchs2Unix): ImageGrab is not supported with Linux, for alternatives use ImageGrab alternative in linux

Update(as per Carsten Fuchs): ImageGrab is now supported with Linux, might want to update the library first

edited Mar 16 '22 at 19:54

answered Mar 17 '21 at 14:36

Delrius Euphoria

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I tried that, but i made a screenshot of screen, without my Tkinter Canvas. – dominik findeisen Mar 18 '21 at 09:47
@dominikfindeisen You should update your question with the code for canvas you are using. – Delrius Euphoria Mar 18 '21 at 09:48
I added my code, but not all, without a part which is responsible for drawing. – dominik findeisen Mar 19 '21 at 09:43
1

@dominikfindeisen I have already commented the mistake. – Delrius Euphoria Mar 19 '21 at 09:45
I found out something about this, and I think it can be problem of availability. – dominik findeisen Mar 22 '21 at 07:08
Perhaps you can confirm and then update the answer to state `ImageGrab.grab()` doesn't work in Linux. For example I'm researching `wxd` for X11 Linux based systems. Previously I used `Gdk.pixbuf_get_from_window` but that is painfully slow (in computer terms). – WinEunuuchs2Unix Jun 18 '21 at 23:32
1

@CoolCloud Even though I can't use answer on Linux, up vote for edit effort :) – WinEunuuchs2Unix Jun 19 '21 at 18:48
2

According to https://pillow.readthedocs.io/en/latest/reference/ImageGrab.html `ImageGrab.grab()` also works on X11 / Linux. – Carsten Fuchs Mar 16 '22 at 11:00
1

I’ve just added this to my own little application running on macOS, and it works perfectly. Thanks. – Manngo May 17 '23 at 11:04

Can I do 'screenshot' of image on the Python Tkinter Canvas and save it in the file?

1 Answers1