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

DemoPrograms old/Demo_Pi_Robotics.py

@@ -0,0 +1,101 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+# Robotics design pattern
+# Uses Realtime Buttons to simulate the controls for a robot
+# Rather than sending a single click when a button is clicked, Realtime Buttons
+#       send button presses continuously while the button is pressed down.
+# Two examples, one using fancy graphics, one plain.
+
+def RemoteControlExample():
+    # Make a form, but don't use context manager
+    sg.SetOptions(element_padding=(0,0))
+    back ='#eeeeee'
+    image_forward = 'ButtonGraphics/RobotForward.png'
+    image_backward = 'ButtonGraphics/RobotBack.png'
+    image_left = 'ButtonGraphics/RobotLeft.png'
+    image_right = 'ButtonGraphics/RobotRight.png'
+
+    sg.SetOptions(border_width=0, button_color=('black', back), background_color=back, element_background_color=back, text_element_background_color=back)
+
+    layout = [[sg.Text('Robotics Remote Control')],
+                 [sg.T('', justification='center', size=(19,1), key='status')],
+                 [ sg.RealtimeButton('', key='Forward', image_filename=image_forward, pad=((50,0),0))],
+                 [ sg.RealtimeButton('', key='Left', image_filename=image_left),
+                   sg.RealtimeButton('', key='Right', image_filename=image_right, pad=((50,0), 0))],
+                 [ sg.RealtimeButton('', key='Reverse', image_filename=image_backward, pad=((50,0),0))],
+                 [sg.T('')],
+                 [sg.Quit(button_color=('black', 'orange'))]]
+
+    window = sg.Window('Robotics Remote Control', auto_size_text=True, grab_anywhere=False).Layout(layout)
+
+    #
+    # Some place later in your code...
+    # You need to perform a ReadNonBlocking on your form every now and then or
+    # else it won't refresh.
+    #
+    # your program's main loop
+    while (True):
+        # This is the code that reads and updates your window
+        event, values = window.Read(timeout=0, timeout_key='timeout')
+        if event is not None:
+            window.FindElement('status').Update(event)
+        elif event != 'timeout':
+            window.FindElement('status').Update('')
+        # if user clicked quit button OR closed the form using the X, then break out of loop
+        if event == 'Quit' or values is None:
+            break
+
+    window.Close()
+
+
+def RemoteControlExample_NoGraphics():
+    # Make a form, but don't use context manager
+
+    layout = [[sg.Text('Robotics Remote Control', justification='center')],
+                 [sg.T('', justification='center', size=(19,1), key='status')],
+                 [sg.T(' '*8), sg.RealtimeButton('Forward')],
+                 [ sg.RealtimeButton('Left'), sg.T('              '), sg.RealtimeButton('Right')],
+                 [sg.T(' '*8), sg.RealtimeButton('Reverse')],
+                 [sg.T('')],
+                 [sg.Quit(button_color=('black', 'orange'))]]
+    # Display form to user
+    window = sg.Window('Robotics Remote Control', auto_size_text=True, grab_anywhere=False).Layout(layout)
+
+    #
+    # Some place later in your code...
+    # You need to perform a Read on your form every now and then or
+    # else it won't refresh.
+    # Notice how the timeout is 100ms. You don't have to use a timeout = 0 for all of your hardware
+    # applications.  Leave some CPU for other threads or for your GUI.  The longer you are in the GUI, the more
+    # responsive the GUI itself will be  Match your timeout with your hardware's capabilities
+    #
+    # your program's main loop
+    while (True):
+        # This is the code that reads and updates your window
+        event, values = window.Read(timeout=100, timeout_key='timeout')
+        # print(event, values)
+        if event != 'timeout':
+            window.FindElement('status').Update(event)
+        else:
+            window.FindElement('status').Update('')
+        # if user clicked quit button OR closed the form using the X, then break out of loop
+        if event in (None, 'Quit'):
+            break
+
+    window.Close()
+
+# ------------------------------------- main -------------------------------------
+def main():
+    RemoteControlExample_NoGraphics()
+    # Uncomment to get the fancy graphics version.  Be sure and download the button images!
+    RemoteControlExample()
+    # sg.Popup('End of non-blocking demonstration')
+
+if __name__ == '__main__':
+
+    main()