Major update of all demo programs to use new PEP8 bindings, etc

DemoPrograms old/Demo_Canvas.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+layout = [
+           [sg.Canvas(size=(150, 150), background_color='red', key='canvas')],
+           [sg.T('Change circle color to:'), sg.Button('Red'), sg.Button('Blue')]
+           ]
+
+window = sg.Window('Canvas test').Layout(layout).Finalize()
+
+cir = window.FindElement('canvas').TKCanvas.create_oval(50, 50, 100, 100)
+
+while True:
+    event, values = window.Read()
+    if event is None:
+        break
+    if event in ('Blue', 'Red'):
+        window.FindElement('canvas').TKCanvas.itemconfig(cir, fill=event)