# Tk_magnifying_glass.py

# Tk_magnifying_glass.py

# Just a project made for curious fun

from Tkinter import *
from PIL import Image, ImageTk, ImageGrab
from ctypes import windll, Structure, c_ulong, byref
import ctypes

ww = 300
hh = 300

root = Tk()
root.title("Tk Magnifying Glass")
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh)
canvas.pack()

mw = ww/2
mh = hh/2

mouse = windll.user32

"""It simulates the mouse"""
MOUSEEVENTF_MOVE = 0x0001 # mouse move
MOUSEEVENTF_LEFTDOWN = 0x0002 # left button down
MOUSEEVENTF_LEFTUP = 0x0004 # left button up
MOUSEEVENTF_RIGHTDOWN = 0x0008 # right button down
MOUSEEVENTF_RIGHTUP = 0x0010 # right button up
MOUSEEVENTF_MIDDLEDOWN = 0x0020 # middle button down
MOUSEEVENTF_MIDDLEUP = 0x0040 # middle button up
MOUSEEVENTF_WHEEL = 0x0800 # wheel button rolled
MOUSEEVENTF_ABSOLUTE = 0x8000 # absolute move
SM_CXSCREEN = 0
SM_CYSCREEN = 1

class POINT(Structure):
    _fields_ = [("x", c_ulong), ("y", c_ulong)]
0
def capture_canvas():
    x = root.winfo_rootx() + canvas.winfo_x()
    y = root.winfo_rooty() + canvas.winfo_y()
    xx = x + canvas.winfo_width()
    yy = y + canvas.winfo_height()
    return ImageGrab.grab(bbox=(x, y, xx, yy))
0
zoom = 16
xx = ww/zoom
yy = hh/zoom
while 1:
    pt = POINT()
    windll.user32.GetCursorPos(byref(pt))
    x, y = pt.x, pt.y
    BBox = (x-xx/2, y-yy/2, x+xx/2, y+yy/2)
    pic = ImageGrab.grab(BBox)
    pic = pic.resize((pic.width*zoom, pic.height*zoom), Image.ANTIALIAS)
    imgTk = ImageTk.PhotoImage(pic)
    canvas.create_image(0, 0, anchor=NW, image=imgTk)
    canvas.update()