Toolbox equivalent of the ScriptableWizard class

Author: arimger

Assets/Editor Toolbox/Editor/Windows.meta

@@ -0,0 +1,93 @@
+using UnityEditor;
+using UnityEngine;
+
+namespace Toolbox.Editor.Wizards
+{
+    using Editor = UnityEditor.Editor;
+
+    public class ToolboxWizard : EditorWindow
+    {
+        private Editor targetEditor;
+
+        private Vector2 scrollPosition;
+
+        private void OnDestroy()
+        {
+            DestroyImmediate(targetEditor);
+        }
+
+        private void OnGUI()
+        {
+            using (var scrollView = new EditorGUILayout.ScrollViewScope(scrollPosition))
+            {
+                scrollPosition = scrollView.scrollPosition;
+                EditorGUI.BeginChangeCheck();
+                OnWizardGui();
+                if (EditorGUI.EndChangeCheck())
+                {
+                    OnWizardUpdate();
+                }
+            }
+
+            using (new EditorGUILayout.VerticalScope())
+            {
+                GUILayout.FlexibleSpace();
+                using (new EditorGUILayout.HorizontalScope())
+                {
+                    GUILayout.FlexibleSpace();
+                    HandleOtherButtons();
+                    GUI.enabled = IsValid;
+                    if (HandleCreateButton())
+                    {
+                        OnWizardCreate();
+                        Close();
+                        GUIUtility.ExitGUI();
+                    }
+
+                    GUI.enabled = true;
+                }
+
+                GUILayout.Space(5);
+            }
+        }
+
+        private void PrepareEditor()
+        {
+            if (targetEditor != null)
+            {
+                return;
+            }
+
+            targetEditor = Editor.CreateEditor(this);
+            targetEditor.hideFlags = HideFlags.HideAndDontSave;
+            OnWizardUpdate();
+        }
+
+        protected virtual void OnWizardCreate()
+        { }
+
+        protected virtual void OnWizardUpdate()
+        { }
+
+        protected virtual void OnWizardGui()
+        {
+            PrepareEditor();
+            targetEditor.OnInspectorGUI();
+        }
+
+        protected virtual bool HandleCreateButton()
+        {
+            return GUILayout.Button("Create", GUILayout.MinWidth(100));
+        }
+
+        protected virtual void HandleOtherButtons()
+        { }
+
+        public static T DisplayWizard<T>(string title) where T : ToolboxWizard
+        {
+            return GetWindow<T>(true, title);
+        }
+
+        protected bool IsValid { get; set; } = true;
+    }
+}

Assets/Editor Toolbox/Editor/Windows/ToolboxWizard.cs

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+using Toolbox.Editor.Wizards;
+
+using UnityEditor;
+using UnityEngine;
+
+public class SampleWizard : ToolboxWizard
+{
+    [SerializeField, InLineEditor]
+    private GameObject prefab;
+    [SerializeField]
+    private string targetName;
+
+    private bool hasInvalidName;
+
+    [MenuItem("GameObject/Sample Wizard")]
+    public static void CreateWizard()
+    {
+        DisplayWizard<SampleWizard>("Create GameObject");
+    }
+
+    protected override void OnWizardCreate()
+    {
+        GameObject go;
+        if (prefab != null)
+        {
+            go = Instantiate(prefab);
+            go.name = targetName;
+        }
+        else
+        {
+            go = new GameObject(targetName);
+        }
+
+        Selection.activeObject = go;
+    }
+
+    protected override void OnWizardUpdate()
+    {
+        hasInvalidName = string.IsNullOrEmpty(targetName);
+    }
+
+    protected override void OnWizardGui()
+    {
+        base.OnWizardGui();
+        if (hasInvalidName)
+        {
+            EditorGUILayout.HelpBox("Name is invalid", MessageType.Error, true);
+        }
+    }
+
+    protected override void HandleOtherButtons()
+    {
+        //you can draw more buttons here
+    }
+}