New Demo application - Integrating with Turtle

Demo_Turtle.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+import turtle
+
+"""
+    Demo showing how to integrate drawing on a Canvas using  Turtle with PySimpleGUI
+    The patern to follow:
+        Create Window & Finalize
+        Get the tkinter Canvas from the Canvas element
+        Draw on the tkinter Canvas using turtle commands.
+        Results are shown on the canvas immiedately after button press / drawing command
+"""
+
+
+layout = [[ sg.Text('My layout') ],
+          [sg.Canvas(size=(500,500), key='_canvas_')],
+          [ sg.RButton('F'), sg.RButton('B'), sg.RButton('L'), sg.RButton('R')]]
+
+window = sg.Window('My new window').Layout(layout).Finalize()
+
+canvas = window.FindElement('_canvas_').TKCanvas
+
+t = turtle.RawTurtle(canvas)
+t.pencolor("#ff0000") # Red
+
+t.penup()   # Regarding one of the comments
+t.pendown() # Regarding one of the comments
+
+while True:     # Event Loop
+    button, value = window.Read()
+    if button is None:
+        break
+
+    if button == 'F':
+        t.forward(100)
+    elif button == 'B':
+        t.back(100)
+    elif button == 'L':
+        t.left(90)
+    elif button == 'R':
+        t.right(90)
+