Updated Menu demo

Demo_Menus.py

@@ -6,16 +6,27 @@ import PySimpleGUI as sg
     Check out the variable menu_def for a hint on how to 
     define menus
 """
+def SecondForm():
+
+    layout = [[sg.Text('The second form is small \nHere to show that opening a window using a window works')],
+              [sg.OK()]]
+
+    form = sg.FlexForm('Second Form')
+    b, v = form.LayoutAndRead(layout)
+
+
 def TestMenus():
     import PySimpleGUI as sg
 
     sg.ChangeLookAndFeel('LightGreen')
     sg.SetOptions(element_padding=(0, 0))
 
-    menu_def = [['File', ['Open', 'Save',]],
+    # ------ Menu Definition ------ #
+    menu_def = [['File', ['Open', 'Save', 'Properties']],
                 ['Edit', ['Paste', ['Special', 'Normal',], 'Undo'],],
                 ['Help', 'About...'],]
 
+    # ------ GUI Defintion ------ #
     layout = [
             [sg.Menu(menu_def)],
               [sg.Output(size=(60,20))]
@@ -24,19 +35,22 @@ def TestMenus():
     form = sg.FlexForm("Windows-like program", default_element_size=(12, 1), auto_size_text=False, auto_size_buttons=False,
                        default_button_element_size=(12, 1))
     form.Layout(layout)
-    form.ReadNonBlocking()          # so the print message will show up... yes, a kludge
 
-    print('Give those menus a try!')
+    # ------ Loop & Process button menu choices ------ #
     while True:
         button, values = form.Read()
         if button is None or button == 'Exit':
             return
         print('Button = ', button)
+        # ------ Process menu choices ------ #
         if button == 'About...':
             sg.Popup('About this program','Version 1.0', 'PySimpleGUI rocks...')
         elif button == 'Open':
             filename = sg.PopupGetFile('file to open', no_window=True)
             print(filename)
+        elif button == 'Properties':
+            SecondForm()
+
 
 
 TestMenus()