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

from Tkinter import Tk, Canvas
from math import cos, sin, sqrt, radians
from time import sleep


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})

        # widget sizes
        w = self.width['end']
        h = self.height['end']

        # define section =) #define Yes 1 #define No 0 ;-)
        self.offset = 70
        self.center = {"x": 0+self.offset, "y": h/2}

        self.radius      = 50
        self.line_length = 23



        self.truck = [
                 (-self.line_length,-self.radius),
                 (+self.line_length,-self.radius),

                 (+self.radius,-self.line_length),
                 (+self.radius,+self.line_length),

                 (+self.line_length,+self.radius),
                 (-self.line_length,+self.radius),

                 (-self.radius,+self.line_length),
                 (-self.radius,-self.line_length),

                 # double this point to close circuit
                 (-self.line_length,-self.radius)

                ]


        # Tk bindings
        self.__bindings(master)


        # need first run to redraw
        self.__draw()
#        self.__draw_loop()




    """SLOT to update when window is resizing"""
    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("all")
        # widget sizes
        w = self.width['end']
        h = self.height['end']

        truck = self.truck
        radius = self.radius
        line_length = self.line_length
        center = self.center
        offset = self.offset

        for i in xrange(len(truck)):
            # check the last item
            try:
                self.canvas.create_line(center['x']+truck[i][0], center['y']+truck[i][1],
                                        center['x']+truck[i+1][0], center['y']+truck[i+1][1],
                                        tag="border")

                self.canvas.create_line(center['x'], center['y'],
                                        center['x']+truck[i][0], center['y']+truck[i][1],
                                        tag="diagonal")
            except:
                pass


        # draw dash line.
        self.canvas.create_line(
                                0+offset, h/2,
                                w-offset, h/2,
                                tags="line",
                                fill="blue",
                                width="2.0",
                                dash="5",
                                )


    def __rotate_truck(self):
        degree = 10
        for i in xrange(len(self.truck)):
            self.truck[i] = self.__matrix_multiplication(self.truck[i], radians(degree))




    def __draw_loop(self, event=None):
#        sleep(5.50)
        print "Run loop"
        self.canvas.delete("all || !line")

        self.__rotate_truck()

        self.__draw()










    def __bindings(self, master):
        # binding master window resize
#        master.bind("<Configure>", self.__update_coords)
#        master.bind("<Configure>", self.__draw)
        master.bind("<Button-1>", self.__draw_loop)

    def __matrix_multiplication(self, point, degree):
        a11 = point[0]
        a12 = point[1]
        a13 = 1

        b11 = cos(degree)
        b12 = sin(degree)
        b13 = 0

        b21 = -sin(degree)
        b22 = cos(degree)
        b23 = 0

        b31 = 0
        b32 = 0
        b33 = 1

        return a11*b11+a12*b21+a13*b31 ,  a11*b12+a12*b22+a13*b32


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

app = App(root)

root.mainloop()