Moved all demo programs into subfolder

DemoPrograms/Demo_Timer.py

@@ -0,0 +1,43 @@
+import PySimpleGUI as sg
+import time
+
+# form that doen't block
+# good for applications with an loop that polls hardware
+def Timer():
+    sg.ChangeLookAndFeel('Dark')
+    sg.SetOptions(element_padding=(0,0))
+    # Make a form, but don't use context manager
+    form = sg.FlexForm('Running Timer', no_titlebar=True, auto_size_buttons=False)
+    # Create a text element that will be updated with status information on the GUI itself
+    # Create the rows
+    form_rows = [[sg.Text('')],
+                 [sg.Text('', size=(8, 2), font=('Helvetica', 20), justification='center', key='text')],
+                 [sg.ReadFormButton('Pause'), sg.ReadFormButton('Reset'), sg.Exit(button_color=('white','firebrick4'))]]
+    # Layout the rows of the form and perform a read. Indicate the form is non-blocking!
+    form.Layout(form_rows)
+    #
+    # your program's main loop
+    i = 0
+    paused = False
+    while (True):
+        # This is the code that reads and updates your window
+        button, values = form.ReadNonBlocking()
+        form.FindElement('text').Update('{:02d}:{:02d}.{:02d}'.format((i // 100) // 60, (i // 100) % 60, i % 100))
+
+        if values is None or button == 'Exit':
+            break
+
+        if button is 'Reset':
+            i=0
+        elif button is 'Pause':
+            paused = not paused
+
+        if not paused:
+            i += 1
+        # Your code begins here
+        time.sleep(.01)
+
+    # Broke out of main loop. Close the window.
+    form.CloseNonBlockingForm()
+
+Timer()