Removed old Pi Robotics demo. Added Demo_Buttons_Realtime

DemoPrograms/Demo_Buttons_Realtime.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+"""
+    Demo - Realtime Buttons
+
+    Realtime buttons provide a way for you to get a continuous stream of button
+    events for as long as a button is held down.
+
+    This demo is using a timeout to determine that a button has been released.
+    If your application doesn't care when a button is released and only needs to know
+    that it's being held down, then  you can remove the timeout on the window read call.
+
+    Note that your reaction latency will be the same as your timeout value.  In this demo
+    the timeout is 100, so there will be 100ms between releasing a button and your program detecting
+    this has happened.
+
+    Copyright 2021 PySimpleGUI
+"""
+
+import PySimpleGUI as sg
+
+def main():
+    # The Quit button is being placed in the bottom right corner and the colors are inverted, just for fun
+    layout = [[sg.Text('Robotics Remote Control')],
+              [sg.Text('Hold Down Button To Move')],
+              [sg.Text()],
+              [sg.Text('           '),
+               sg.RealtimeButton(sg.SYMBOL_UP, key='-FORWARD-')],
+              [sg.RealtimeButton(sg.SYMBOL_LEFT, key='-LEFT-'),
+               sg.Text(size=(10,1), key='-STATUS-', justification='c', pad=(0,0)),
+               sg.RealtimeButton(sg.SYMBOL_RIGHT, key='-RIGHT-')],
+              [sg.Text('           '),
+               sg.RealtimeButton(sg.SYMBOL_DOWN, key='-DOWN-')],
+              [sg.Text()],
+              [sg.Column([[sg.Quit(button_color=(sg.theme_button_color()[1], sg.theme_button_color()[0]), focus=True)]], justification='r')]]
+
+    window = sg.Window('Robotics Remote Control', layout)
+
+    while True:
+        # This is the code that reads and updates your window
+        event, values = window.read(timeout=100)
+        if event in (sg.WIN_CLOSED, 'Quit'):
+            break
+        if event != sg.TIMEOUT_EVENT:
+            # if not a timeout event, then it's a button that's being held down
+            window['-STATUS-'].update(event)
+        else:
+            # A timeout signals that all buttons have been released so clear the status display
+            window['-STATUS-'].update('')
+
+    window.close()
+
+if __name__ == '__main__':
+    sg.theme('dark red')
+    main()