With this code, from the documantation of tkinter, you can draw in a window using the canvas widget. I added the chance to save the image.
The code without the saving function
import tkinter as tk
lastx, lasty = 0, 0
def xy(event):
"Takes the coordinates of the mouse when you click the mouse"
global lastx, lasty
lastx, lasty = event.x, event.y
def addLine(event):
"""Creates a line when you drag the mouse
from the point where you clicked the mouse to where the mouse is now"""
global lastx, lasty
canvas.create_line((lastx, lasty, event.x, event.y))
# this makes the new starting point of the drawing
lastx, lasty = event.x, event.y
root = tk.Tk()
root.geometry("800x600")
root.columnconfigure(0, weight=1)
root.rowconfigure(0, weight=1)
canvas = tk.Canvas(root)
canvas.grid(column=0, row=0, sticky=(tk.N, tk.W, tk.E, tk.S))
canvas.bind("<Button-1>", xy)
canvas.bind("<B1-Motion>", addLine)
root.mainloop()
The code with the saving function
import tkinter as tk
from PIL import ImageGrab
lastx, lasty = 0, 0
def xy(event):
"Takes the coordinates of the mouse when you click the mouse"
global lastx, lasty
lastx, lasty = event.x, event.y
def addLine(event):
"""Creates a line when you drag the mouse
from the point where you clicked the mouse to where the mouse is now"""
global lastx, lasty
canvas.create_line((lastx, lasty, event.x, event.y))
# this makes the new starting point of the drawing
lastx, lasty = event.x, event.y
def save(event):
x=root.winfo_rootx()+canvas.winfo_x()
y=root.winfo_rooty()+canvas.winfo_y()
x1=x+canvas.winfo_width()
y1=y+canvas.winfo_height()
im = ImageGrab.grab((x, y, x1, y1))
im.save("captured.png")
root = tk.Tk()
root.geometry("800x600")
root.columnconfigure(0, weight=1)
root.rowconfigure(0, weight=1)
canvas = tk.Canvas(root)
canvas.grid(column=0, row=0, sticky=(tk.N, tk.W, tk.E, tk.S))
canvas.bind("<Button-1>", xy)
canvas.bind("<B1-Motion>", addLine)
root.bind("<Control-s>", save)
root.mainloop()
Tkinter test for students
Tkinter articles
