Release of Column support

Demo_Columns.py

@@ -0,0 +1,24 @@
+import PySimpleGUI as sg
+
+# Demo of how columns work
+# Form has on row 1 a vertical slider followed by a COLUMN with 7 rows
+# Prior to the Column element, this layout was not possible
+# Columns layouts look identical to form layouts, they are a list of lists of elements.
+
+# sg.ChangeLookAndFeel('BlueMono')
+
+# Column layout
+col = [[sg.Text('col Row 1', text_color='white', background_color='blue')],
+       [sg.Text('col Row 2', text_color='white', background_color='blue'), sg.Input('col input 1')],
+       [sg.Text('col Row 3', text_color='white', background_color='blue'), sg.Input('col input 2')]]
+
+layout = [[sg.Listbox(values=('Listbox Item 1', 'Listbox Item 2', 'Listbox Item 3'), select_mode=sg.LISTBOX_SELECT_MODE_MULTIPLE, size=(20,3)), sg.Column(col, background_color='blue')],
+          [sg.Input('Last input')],
+          [sg.OK()]]
+
+# Display the form and get values
+# If you're willing to not use the "context manager" design pattern, then it's possible
+# to collapse the form display and read down to a single line of code.
+button, values = sg.FlexForm('Compact 1-line form with column').LayoutAndRead(layout)
+
+sg.MsgBox(button, values, line_width=200)