from random import randrange as rnd, choice
from tkinter import *
import math
import time

root = Tk()
root.geometry('800x600')

canv = Canvas(root, bg = 'white')
canv.pack(fill = BOTH, expand = 10)

colors = ['brown','green','lightgreen','yellow','black','blue']

class ball():
        def __init__(self):
                x = self.x = rnd(50,700)
                y = self.y = rnd(50,550)
                r = self.r = rnd(10,30)
                self.color = choice(colors)
                self.pen_color = choice(colors)
                self.pen_color_original = self.pen_color
                self.select = 0
                self.width = 0
                self.id = canv.create_oval(x-r,y-r,x+r,y+r, fill = self.color, width = self.width, outline = self.pen_color)
                self.paint()
 
        def paint(self):
                x = self.x
                y = self.y
                r = self.r
                canv.coords(self.id,x-r,y-r,x+r,y+r)
                canv.itemconfig (self.id, fill = self.color, width = self.width, outline = self.pen_color)
        def kill(self):
                canv.delete(self.id)
                balls.remove(self)
                
def paint():
        for b in balls:
                b.paint()

def fill_random(event):
        global balls
        canv.delete(ALL)
        balls = []
        for z in range(12):
                balls += [ball()]

def move(event):
        if sel:
                canv.delete('mm2')
                canv.create_rectangle(sx,sy,event.x,event.y,tag = "mm2")


def select_on(event):
        global sel,sx,sy
        sel = 1
        sx = event.x
        sy = event.y
        
def select_off(event):
        global sel
        sel = 0
        sx2 = event.x
        sy2 = event.y
        canv.delete('mm2')
        #canv.create_rectangle(sx,sy,mx,my,tag = "mm2")
        for i in balls:
                if (sx > i.x > sx2 or sx2 > i.x > sx) and (sy > i.y > sy2 or sy2 > i.y > sy) or ((sx2-i.x)**2  + (sy2-i.y)**2 < i.r**2):
                        i.pen_color = "#fe0000"
                        i.width = 3
                        i.paint()
                        i.select = 1
                else:
                        i.pen_color = i.pen_color_original
                        i.paint()       
                        i.select = 0
        
def delete_sel(event):
        for b in [b for b in balls if b.select]:
                b.kill()
        
sel = 0
fill_random(0) 
canv.bind('<Button-2>', fill_random)
root.bind('<Delete>', delete_sel)
canv.bind('<Button-1>', select_on)
canv.bind('<ButtonRelease-1>', select_off)
canv.bind('<Motion>', move)

mainloop()