Pi Robotics Demo / Design Pattern

Demo_Pi_Robotics.py

@@ -0,0 +1,96 @@
+import PySimpleGUI 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
+    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)
+    form = sg.FlexForm('Robotics Remote Control', auto_size_text=True)
+    status_display_elem = sg.T('', justification='center', size=(19,1))
+    form_rows = [[sg.Text('Robotics Remote Control')],
+                 [status_display_elem],
+                 [sg.T(' '*10), sg.RealtimeButton('Forward', image_filename=image_forward)],
+                 [ sg.RealtimeButton('Left', image_filename=image_left), sg.T('     '), sg.RealtimeButton('Right', image_filename=image_right)],
+                 [sg.T(' '*10), sg.RealtimeButton('Reverse', image_filename=image_backward)],
+                 [sg.T('')],
+                 [sg.Quit(button_color=('black', 'orange'))]
+                 ]
+
+    form.LayoutAndRead(form_rows, non_blocking=True)
+
+    #
+    # 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
+        button, values = form.ReadNonBlocking()
+        if button is not None:
+            status_display_elem.Update(button)
+        else:
+            status_display_elem.Update('')
+        # if user clicked quit button OR closed the form using the X, then break out of loop
+        if button == 'Quit' or values is None:
+            break
+
+    form.CloseNonBlockingForm()
+
+
+def RemoteControlExample_NoGraphics():
+    # Make a form, but don't use context manager
+    form = sg.FlexForm('Robotics Remote Control', auto_size_text=True)
+    status_display_elem = sg.T('', justification='center', size=(19,1))
+    form_rows = [[sg.Text('Robotics Remote Control')],
+                 [status_display_elem],
+                 [sg.T(' '*10), sg.RealtimeButton('Forward')],
+                 [ sg.RealtimeButton('Left'), sg.T('                '), sg.RealtimeButton('Right')],
+                 [sg.T(' '*10), sg.RealtimeButton('Reverse')],
+                 [sg.T('')],
+                 [sg.Quit(button_color=('black', 'orange'))]
+                 ]
+    # Display form to user
+    form.LayoutAndRead(form_rows, non_blocking=True)
+
+    #
+    # 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
+        button, values = form.ReadNonBlocking()
+        if button is not None:
+            status_display_elem.Update(button)
+        else:
+            status_display_elem.Update('')
+        # if user clicked quit button OR closed the form using the X, then break out of loop
+        if button == 'Quit' or values is None:
+            break
+
+    form.CloseNonBlockingForm()
+
+
+
+
+# ------------------------------------- main -------------------------------------
+def main():
+    RemoteControlExample_NoGraphics()
+    # Uncomment to get the fancy graphics version.  Be sure and download the button images!
+    # RemoteControlExample()
+    sg.MsgBox('End of non-blocking demonstration')
+
+if __name__ == '__main__':
+
+    main()