from fractions import Fraction as ratio
from tkinter import *
from PIL import Image
from PIL.ImageTk import PhotoImage



class App:
    '''
    A canvas with scrolling support.
    '''

    def __init__(self, master=None, *canvas_args, **canvas_kw):
        frame = self.frame = Frame(root, bg='green')
        frame.rowconfigure(0, weight=1)
        frame.columnconfigure(0, weight=1)

        C = self.canvas = Canvas(frame, *canvas_args, **canvas_kw)

        scrollY = self.scrollY = Scrollbar(
            frame,
            orient=VERTICAL,
            command=C.yview,
            )
        C['yscrollcommand'] = scrollY.set

        scrollX = self.scrollX = Scrollbar(
            frame,
            orient=HORIZONTAL,
            command=C.xview,
            )
        C['xscrollcommand'] = scrollX.set

        C.grid(row=0, column=0, sticky=N+S+E+W)
        scrollY.grid(row=0, column=1, sticky=N+S)
        scrollX.grid(row=1, column=0, sticky=E+W)

        C.bind("<Configure>", self.handle_canvas_resize)

    def handle_canvas_resize(self, event):
        print(event)




from random import randint, expovariate

width, height = 10240, 7680
root = Tk()
app = App(root, bg='black', scrollregion=(0, 0, width, height))
app.frame.pack(expand=True, fill=BOTH)


for _ in range(1000):
    x, y = randint(0, width - 1), randint(0, height - 1)
    #radius = randint(2, 10) // 2
    radius = round(1 + expovariate(1))
    app.canvas.create_oval(
        x - radius, y - radius,
        x + radius, y + radius,
        fill='yellow',
        )