Demo Using the Sizer Element

DemoPrograms/Demo_Layout_Vertical_Centered_Using_Sizer_Element.py

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+import PySimpleGUI as sg
+
+"""
+    Sizer Element
+
+    Using a Sizer Element to set the size of a window without setting the size on the Window.
+
+    If you use the size parameter for a window, you may end up cutting off a portion of your Window
+        if the contents of layout are greater in size than the hard coded size you used.
+
+    You can use a Sizer element to "pad" a layout into something bigger.
+
+    This Element is actually implemented using a Column inside of PySimpleGUI so it's not an
+    element in reality, but more along the lines of a User Defined Element
+
+    This demo shows how you can make a 500x500 pixel window without hardcoding the size and while
+        also centering the contents of your layout.
+
+    Copyright 2021 PySimpleGUI
+"""
+
+
+# "Centered in a large Window" version
+# A simple layout that you want to "center" in the middle of a 500 x 500 pixel window (not counting titlebar)
+layout = [  [sg.Text('My Window')],
+            [sg.In()],
+            [sg.In()],
+            [sg.Button('Go'), sg.Button('Exit'), sg.Cancel(), sg.Ok()]  ]
+
+# If you wanted to center it in a window, just put into a Column element
+# and use the Sizer element to "pad" the layout
+
+# The entire layout is a single row with a sizer that is 500 pixels high.
+# Because elements on a row center themselves vertically, you'll end up with the layout centered vertically
+layout = [[sg.Sizer(0,500), sg.Column([[sg.Sizer(500,0)]] + layout, element_justification='c', pad=(0,0))]]
+
+window = sg.Window('Window Title', layout, margins=(0,0))
+
+window.read(close=True)
+