#!/usr/bin/env python2
# -*- coding: utf-8 -*-

from Tkinter import Tk, Canvas


class App:
    def __init__(self, master):

        self.master = master

        self.width  = {"start": 0, "end": 640}
        self.height = {"start": 0, "end": 480}

        self.canvas = Canvas(master)

        self.canvas.configure({"bg": "white"})
        self.canvas.pack({"fill": "both", "expand": True})


        # Tk bindings
        self.__bindings(master)
    def __update_coords(self, event):
        # bind event, to update coordinates
        self.width['end']  = event.width
        self.height['end'] = event.height

        self.canvas.update_idletasks()

        self.__draw()


    def __draw(self, event=None):
        self.canvas.delete("diagonal")
        self.canvas.create_line(
                                self.width['start'],
                                self.height['start'],
                                self.width['end'],
                                self.height['end'],
                                tags="diagonal")




    def __bindings(self, master):
        # binding master window resize
        master.bind("<Configure>", self.__update_coords)
#        master.bind("<Configure>", self.__draw)


root = Tk()
root.title("MachineGraphics. Lab2. Variant 2")
root.geometry("640x480-0+100")

app = App(root)

root.mainloop()