Moved all demo programs into subfolder

DemoPrograms/Demo_Font_Sizer.py

@@ -0,0 +1,30 @@
+
+# Testing async form, see if can have a slider
+# that adjusts the size of text displayed
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+fontSize = 12
+layout = [[sg.Spin([sz for sz in range(6, 172)], font=('Helvetica 20'), initial_value=fontSize, change_submits=True, key='spin'),
+           sg.Slider(range=(6,172), orientation='h', size=(10,20), change_submits=True, key='slider', font=('Helvetica 20')),  sg.Text("Aa", size=(2, 1), font="Helvetica " + str(fontSize), key='text')]]
+sz = fontSize
+window = sg.Window("Font size selector", grab_anywhere=False)
+window.Layout(layout)
+while True:
+    event, values= window.Read()
+    if event is None or event == 'Quit':
+        break
+    sz_spin = int(values['spin'])
+    sz_slider = int(values['slider'])
+    sz = sz_spin if sz_spin != fontSize else sz_slider
+    if sz != fontSize:
+        fontSize = sz
+        font = "Helvetica " + str(fontSize)
+        window.FindElement('text').Update(font=font)
+        window.FindElement('slider').Update(sz)
+        window.FindElement('spin').Update(sz)
+
+print("Done.")