New Demo Program! IP Address Entry

DemoPrograms/Demo_IP_Address_Entry.py

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+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
+InIp = lambda key: sg.Input(do_not_clear=True, size=(3, 1), key=key, pad=(0, 2))
+
+layout = [[sg.Text('Your typed chars appear here:'), sg.Text('', key='_OUTPUT_')],
+            [InIp(0), sg.T('.'), InIp(1), sg.T('.'), InIp(2), sg.T('.'), InIp(3)],
+            [sg.Button('Ok', key='_OK_', bind_return_key=True), sg.Button('Exit')]]
+
+window = sg.Window('Window Title', return_keyboard_events=True).Layout(layout)
+
+while True:             # Event Loop
+    event, values = window.Read()
+    print(event)
+    if event is None or event == 'Exit':
+        break
+    elem = window.FindElementWithFocus()
+    if elem is not None:
+        key = elem.Key
+        value = values[key]                 # get value of input field that has focus
+        if event == '.' and key!= '_OK_':                    # if a ., then advance to next field
+            elem.Update(value[:-1])
+            value = value[:-1]
+            next_elem = window.Element(key+1)
+            next_elem.SetFocus()
+        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.Element(key+1)
+            next_elem.SetFocus()
+        elif len(value)> 2 and key == 3:
+            window.Element('_OK_').SetFocus()
+            print('You entered IP Address {}.{}.{}.{}'.format(*values.values()))
+
+window.Close()