Renamed return value from Read call from button to event... EVERYWHERE

Demo_Font_String.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+layout = [[sg.Text('This is my sample text',size=(20,1), key='_text_') ],
+          [sg.CB('Bold', key='_bold_', change_submits=True),
+           sg.CB('Italics', key='_italics_', change_submits=True),
+           sg.CB('Underline', key='_underline_', change_submits=True)],
+          [sg.Slider((6,50), default_value=12, size=(14,20), orientation='h', key='_slider_', change_submits=True),
+           sg.Text('Font size')],
+          [sg.Text('Font string = '), sg.Text('', size=(25,1), key='_fontstring_')],
+          [ sg.RButton('Exit')]]
+
+window = sg.Window('Font string builder').Layout(layout)
+
+text_elem = window.FindElement('_text_')
+while True:     # Event Loop
+    event, values = window.Read()
+    if event in (None, 'Exit'):
+        break
+    font_string = 'Helvitica '
+    font_string += str(values['_slider_'])
+    if values['_bold_']:
+        font_string += ' bold'
+    if values['_italics_']:
+        font_string += ' italic'
+    if values['_underline_']:
+        font_string += ' underline'
+    text_elem.Update(font=font_string)
+    window.FindElement('_fontstring_').Update('"'+font_string+'"')
+    print(event, values)