ScriptableSingletonを使用したケース

EditorWindowTest.cs

using UnityEngine;
using UnityEditor;

public class EditorWindowParameter : ScriptableSingleton<EditorWindowParameter>
{
	public EditorWindowTest window;
	public string message;
}

public class EditorWindowTest : EditorWindow 
{
	[MenuItem("Window/Show")]
	static void Init()
	{
		var instance = EditorWindowParameter.instance;
		if (instance.window == null) {
			instance.window = EditorWindow.CreateInstance<EditorWindowTest> ();
			instance.message = "C";
		}
		instance.window.Show ();
	}
	 
	void OnGUI()
	{
		var instance = EditorWindowParameter.instance;
		GUILayout.Label (instance.message);
		if (GUILayout.Button ("PUSH")) { instance.message += "#"; }
	}
}