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Editor/ScenePartitionToolbar.cs

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+using UnityEditor;
+using UnityEditor.Overlays;
+using UnityEditor.Toolbars;
+using UnityEngine;
+
+namespace VertexColor.ScenePartition.Editor
+{
+    [Overlay(typeof(SceneView), "ScenePartition")]
+    public class ScenePartitionToolbar : ToolbarOverlay
+    {
+        private const string iconPath = "Packages/com.vertexcolor.scenepartition/Editor/Icons";
+
+        public ScenePartitionToolbar() : base(Load.Id, Save.Id, GenerateGrid.Id) { }
+
+        [EditorToolbarElement(Id, typeof(SceneView))]
+        public class Load : EditorToolbarButton, IAccessContainerWindow
+        {
+            public const string Id = "ScenePartition/Load";
+
+            public EditorWindow containerWindow { get; set; }
+
+            public Load()
+            {
+                text = "Load";
+                icon = AssetDatabase.LoadAssetAtPath<Texture2D>($"{iconPath}/Load.png");
+                tooltip = "Load the entire scene";
+                clicked += OnClick;
+            }
+
+            void OnClick()
+            {
+                if (!ScenePartitionUtils.TryGetScenePartitionSOForActiveScene(out ScenePartitionSO scenePartitionSO)) return;
+
+                scenePartitionSO.LoadAll();
+            }
+        }
+
+        [EditorToolbarElement(Id, typeof(SceneView))]
+        public class Save : EditorToolbarButton, IAccessContainerWindow
+        {
+            public const string Id = "ScenePartition/Save";
+
+            public EditorWindow containerWindow { get; set; }
+
+            public Save()
+            {
+                text = "Save";
+                icon = AssetDatabase.LoadAssetAtPath<Texture2D>($"{iconPath}/Save.png");
+                tooltip = "Save scene";
+                clicked += OnClick;
+            }
+
+            void OnClick()
+            {
+                if (!ScenePartitionUtils.TryGetScenePartitionSOForActiveScene(out ScenePartitionSO scenePartitionSO)) return;
+
+                scenePartitionSO.Save();
+            }
+        }
+
+        [EditorToolbarElement(Id, typeof(SceneView))]
+        public class GenerateGrid : EditorToolbarButton, IAccessContainerWindow
+        {
+            public const string Id = "ScenePartition/GenerateGrid";
+
+            public EditorWindow containerWindow { get; set; }
+
+            public GenerateGrid()
+            {
+                text = "GenerateGrid";
+                icon = AssetDatabase.LoadAssetAtPath<Texture2D>($"{iconPath}/GenerateGrid.png");
+                tooltip = "Generate scene grid";
+                clicked += OnClick;
+            }
+
+            void OnClick()
+            {
+                if (!ScenePartitionUtils.TryGetScenePartitionSOForActiveScene(out ScenePartitionSO scenePartitionSO)) return;
+
+                scenePartitionSO.GenerateSceneGridData();
+            }
+        }
+    }
+}

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