Turn plain text into a messenger chat animation using python's turtle graphic library.

turtle-messenger.py

import turtle 
# msgr font is Roboto

# draw rounded corner
def corner(tess):
	for i in range(15):
		tess.right(6)
		tess.forward(2)

# draw rounded, filled rectangle of around (40+h)*(40+w) dimensions
def round_rec(tess, h, w):
	tess.pd()
	tess.begin_fill()
	tess.seth(0)
	for i in [w,h,w,h]:
		tess.forward(i)
		corner(tess)
	tess.end_fill()

# write out a message with a set width
def write_block(tess, text, w):
	tess.pu()
	x = tess.xcor()
	y = tess.ycor()
	line = 0
	font_h = 16
	for i in range(len(text)):
		if tess.xcor() - x >= w -3:
			line += 1
			tess.goto(x, (y - line * (font_h+7)))
		tess.write(text[i], True, font=("Roboto", font_h, "normal"))
		# tess.seth(0)
		# tess.forward(2)

 # draw one text bubble for the input text at the predefined width
def bubble(tess, text, w, x_i, y_i, bubble_color = "blue", text_color = "white"):
	tess.pu()
	tess.goto(x_i, y_i)
  # write out everything to see how tall it should be
	write_block(tess, text, w)
	h = abs(tess.ycor() - y_i) + 5
	tess.goto(x_i, y_i+30)
	tess.pencolor(bubble_color)
	tess.fillcolor(bubble_color)
  # fill in bubble
	round_rec(tess, h, w)
	tess.pu()
	tess.seth(270)
	tess.forward(32)
	tess.pencolor(text_color)
  # rewrite everything bc the rectangle filled in over it
  # yes it is horribly inefficient yes there's probably a better way
  # oh well
	write_block(tess, text, w)
	return h

# draw a full conversation from messages
def draw_conversation(messages, w):
  # basic set up and such
	wn = turtle.Screen()
	wn.bgcolor("white") 
	wh = wn.window_height()/2 - 50
	ww = wn.window_width()/2 - 50
	y = wh
	them_x = -ww
	you_x = them_x + 0.7*w

	tess = turtle.Turtle()
	tess.pensize(3)
	tess.pu()
  
  # draw appropriate bubble in appropriate location depending on who's msg
	prior = True
	for sender, text in messages:
		if prior != sender:
			y -= 7
		if sender:
			y -= bubble(tess, text, w, you_x, y) + 45
		else:
			y -= bubble(tess, text, w, them_x, y, "lightgrey", "black") + 45
		prior = sender

	wn.exitonclick()  


# Example usage
text0 = """Yo what's up dawwwwg?"""
text1= """It's somewhat of a saga, my friend, I fear I'd bore you to tears"""
text2 = """Nah man come on tell me some, you know I'm one for the gossip :D"""
text3 = """Okay then, let me tell you the story of Mel. """
text4 = """Back in the Good Old Days, when the term 'software' sounded funny  
and Real Computers were made out of drums and vacuum tubes, 
Real Programmers wrote in machine code. Not FORTRAN.  Not RATFOR.  Not, even, assembly language. 
Machine Code. Raw, unadorned, inscrutable hexadecimal numbers. Directly."""
text5 = """OMG am I lookin forward to the rest of this."""

# True for messages sent by you; False for those sent by someone else.
msgs = [(True, text0), (False, text1), (True, text2), 
		(False, text3), (False, text4), (True, text5)]

draw_conversation(msgs, 300)

Example output: