Demo updates with new theme calls

DemoPrograms/Demo_IP_Address_Entry.py

@@ -0,0 +1,52 @@
+import PySimpleGUI as sg
+
+'''
+    IP Address entry window with digit validation and auto advance
+    If not a digit or ., the ignored
+    . will advance the focus to the next entry
+    On the last input, once it's complete the focus moves to the OK button
+    Pressing spacebar with focus on OK generates an -OK- event
+'''
+
+# create a short-cut element so don't have to type this in over and over
+
+
+def MyInput(key): return sg.I('', size=(3, 1), key=key, pad=(0, 2))
+
+
+layout = [[sg.T('Your typed chars appear here:'), sg.T('', key='-OUTPUT-')],
+          [MyInput(0), sg.T('.'), MyInput(1), sg.T('.'),
+           MyInput(2), sg.T('.'), MyInput(3)],
+          [sg.B('Ok', key='-OK-', bind_return_key=True), sg.B('Exit')]]
+
+window = sg.Window('Window Title', layout, return_keyboard_events=True)
+
+while True:             # Event Loop
+    event, values = window.read()
+    print(event)
+    if event is None or event == 'Exit':
+        break
+    elem = window.find_element_with_focus()
+
+    if elem is not None:
+        key = elem.Key
+        # get value of input field that has focus
+        value = values[key]
+        if event == '.' and key != '-OK-':                    # if a ., then advance to next field
+            elem.update(value[:-1])
+            value = value[:-1]
+            next_elem = window[key+1]
+            next_elem.set_focus()
+
+        elif event not in '0123456789':
+            elem.update(value[:-1])
+
+        elif len(value) > 2 and key < 3:     # if 2 digits typed in, move on to next input
+            next_elem = window[key+1]
+            next_elem.set_focus()
+
+        elif len(value) > 2 and key == 3:
+            window['-OK-'].set_focus()
+            print('You entered IP Address {}.{}.{}.{}'.format(*values.values()))
+
+window.close()