Screenshot area from mouse

Question

Am trying to take a screenshot area specifying from my mouse (x, y coordinates).

The next code opens an opaque window, then it starts to listen the mouse left button, when it selects an area it draws a red border color, then it takes the screenshot on that specific area. The issue that am having is removing the opaque color that I set before.

Note: I use the opaque color to let the user know when the program is ready to take the screenshot area.

from pynput.mouse import Listener
from PIL import Image, ImageGrab
import tkinter as tk

root = tk.Tk()


########################## Set Variables ##########################
ix = None
iy = None

#Get the current screen width and height
screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()


#Get and print coordinates
def on_move(x, y):
    print('Pointer moved to {0}'.format( (x, y) ))

#Start and End mouse position
def on_click(x, y, button, pressed):
    global ix, iy
    if button == button.left:              
        #Left button pressed then continue
        if pressed:
            ix = x
            iy = y
            print('left button pressed at {0}'.format( (x, y) ))
        else:    
            print('left button released at {0}'.format( (x, y) ))
            canvas.create_rectangle(ix, iy, x, y, outline="red", width = 5)#Draw a rectangle
            canvas.pack()
            img = ImageGrab.grab(bbox = (ix, iy, x, y))#Take the screenshot
            img.save('screenshot.png')#Save screenshot
            root.quit()#Remove tkinter window

    if not pressed:
        # Stop listener
        return False


#Print the screen width and height
print(screen_width, screen_height)


root_geometry = str(screen_width) + 'x' + str(screen_height) #Creates a geometric string argument
root.geometry(root_geometry) #Sets the geometry string value

root.overrideredirect(True)
root.wait_visibility(root)
root.wm_attributes("-alpha", 0.3)#Set windows transparent

canvas = tk.Canvas(root, width=screen_width, height=screen_height)#Crate canvas
canvas.config(cursor="cross")#Change mouse pointer to cross
canvas.pack()

# Collect events until released
with Listener(on_move=on_move, on_click=on_click) as listener:
    root.mainloop()#Start tkinter window
    listener.join()

System info:

• Linux Mint 20 Cinnamon
• Python3.8

Answer 1

I think you need to update root.wm_attributes again before screenshot. So like this:

# Start and End mouse position
def on_click(x, y, button, pressed):
    global ix, iy

    if button == button.left:

        # Left button pressed then continue
        if pressed:
            ix = x
            iy = y
            print('left button pressed at {0}'.format((x, y)))
        else:
            print('left button released at {0}'.format((x, y)))
            root.wm_attributes('-alpha', 0)
            img = ImageGrab.grab(bbox=(ix, iy, x, y))  # Take the screenshot
            root.quit()  # Remove tkinter window
            img.save('screenshot_area.png')  # Save the screenshot

    if not pressed:
        # Stop listener
        return False

Maybe you can use tkinter.canvas for the rectangle.