basically function but needs a lot of refinement

ConfigStretchContainer.cs

@@ -0,0 +1,54 @@
+using Godot;
+using System;
+
+public partial class ConfigStretchContainer : VBoxContainer
+{
+	private Settings _Settings;
+	private Settings Settings
+	{ get
+		{
+			_Settings ??= GetNode<Settings>("/root/Settings");
+			return _Settings;
+		}
+	}
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+	public void LoadButtonState()
+	{
+		switch (Settings.StretchMode)
+		{
+			case StretchMode.Fit:
+				GetNode<BaseButton>("%ConfigStretchFitButton").ButtonPressed = true;
+				break;
+			case StretchMode.Crop:
+				GetNode<BaseButton>("%ConfigStretchCropButton").ButtonPressed = true;
+				break;
+			case StretchMode.Stretch:
+				GetNode<BaseButton>("%ConfigStretchStretchButton").ButtonPressed = true;
+				break;
+			default:
+				throw new Exception($"Unrecognized {nameof(StretchMode)} {(int)Settings.StretchMode}");
+		}
+	}
+	public StretchMode GetStretchMode()
+	{
+		if (GetNode<BaseButton>("%ConfigStretchFitButton").ButtonPressed)
+			return StretchMode.Fit;
+		else if (GetNode<BaseButton>("%ConfigStretchCropButton").ButtonPressed)
+			return StretchMode.Crop;
+		else if (GetNode<BaseButton>("%ConfigStretchStretchButton").ButtonPressed)
+			return StretchMode.Stretch;
+		throw new Exception($"No {nameof(StretchMode)} buttons pressed");
+	}
+	public void OkClicked()
+	{
+		Settings.StretchMode = GetStretchMode();
+	}
+}