import turtle

#NO DOUBLE CLICKING: EXPERIMENT WITH ONCLICK AND ONRELEASE, with a square background turtle :D

wn = turtle.Screen()
bg = turtle.Pen()
p = turtle.Pen()
bg.goto(0,0)
bg.color("")
bg.shape("square")
bg.turtlesize(250,250,0)
p.speed(0)
p.up()
SIZE_P = 1
SIZE_E = 20
i = 0
j = 0
#col

def eup():
  global SIZE_E
  SIZE_E += 5
  p.width(SIZE_E)
def edown():
  global SIZE_E
  if SIZE_E > 0:
    SIZE_E -= 5
  p.width(SIZE_E)
def pup():
  global SIZE_P
  SIZE_P += 1
  p.width(SIZE_P)
def pdown():
  global SIZE_P
  if SIZE_P > 0:
    SIZE_P -= 1
  p.width(SIZE_P)

def size():
  print("Eraser:", SIZE_E)
  print("Pen:", SIZE_P)

def modep():
  print("Mode: Pen")
  wn.onkeypress(pup,"Up")
  wn.onkeypress(pdown,"Down")
  p.color("black")
  p.shape("triangle")
  p.width(SIZE_P)
def modee():
  print("Mode: Eraser")
  wn.onkeypress(eup,"Up")
  wn.onkeypress(edown,"Down")
  p.pencolor("white")
  p.shape("circle")
  p.width(SIZE_E)

def rest(a,b):
  bg.onrelease(None)
  p.up()
  bg.onrelease(rest)
  global i
  print("release", i)
  i += 1
#or, on 1st instance of ondrag, goto cursor. however may appear as lag(done?)
def draw(a,b):
  bg.ondrag(None)
  p.goto(a,b)
  if not p.isdown():
    global j
    p.down()
    print("start", j)
    j += 1
  bg.ondrag(draw)
  
def reset():
    global SIZE_E, SIZE_P
    SIZE_E = 20
    SIZE_P = 1
    p.reset()
    p.up()
    p.speed(0)
def clear():
    p.clear()
modep()

bg.onrelease(rest)
bg.ondrag(draw)
wn.onkey(modee,"e")
wn.onkey(modep,"p")
wn.onkey(size, "s")
wn.onkey(reset, "r")
wn.onkey(clear, "c")

#print(p.isdown())
wn.listen()
wn.mainloop()
#lol perhaps i shld use the while true thing