From a406f2a7984fdeb6f98fc2ff1323165883265140 Mon Sep 17 00:00:00 2001
From: MasatoMakino <makino.masato.g@gmail.com>
Date: Fri, 17 Mar 2023 13:01:25 +0900
Subject: [PATCH 1/2] change : view and model to readonly

---
 src/CheckBoxObject.ts    | 2 +-
 src/ClickableObject.ts   | 2 +-
 src/InteractiveMesh.ts   | 2 +-
 src/InteractiveSprite.ts | 3 +--
 src/RadioButtonObject.ts | 2 +-
 5 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/CheckBoxObject.ts b/src/CheckBoxObject.ts
index f8c9073b..74fef2ee 100644
--- a/src/CheckBoxObject.ts
+++ b/src/CheckBoxObject.ts
@@ -6,7 +6,7 @@ import {
 } from "./";
 
 export class CheckBoxObject<Value> extends ClickableObject<Value> {
-  declare view: CheckBoxMesh<Value> | CheckBoxSprite<Value>;
+  declare readonly view: CheckBoxMesh<Value> | CheckBoxSprite<Value>;
   protected _isSelect: boolean = false;
 
   /**
diff --git a/src/ClickableObject.ts b/src/ClickableObject.ts
index 9c42986d..b72b9ca5 100644
--- a/src/ClickableObject.ts
+++ b/src/ClickableObject.ts
@@ -48,7 +48,7 @@ export class ClickableObject<Value> {
     return this._isPress;
   }
 
-  view: ClickableView<Value>;
+  readonly view: ClickableView<Value>;
   protected _isPress: boolean = false;
   protected _isOver: boolean = false;
   protected _enable: boolean = true;
diff --git a/src/InteractiveMesh.ts b/src/InteractiveMesh.ts
index 488a8189..6470c6cd 100644
--- a/src/InteractiveMesh.ts
+++ b/src/InteractiveMesh.ts
@@ -17,7 +17,7 @@ class InteractiveMesh<Value, Model extends ClickableObject<Value>>
   extends Mesh
   implements IClickableObject3D<Value>
 {
-  public model: Model;
+  readonly model: Model;
 
   constructor(
     parameters: InteractiveMeshParameters,
diff --git a/src/InteractiveSprite.ts b/src/InteractiveSprite.ts
index a78a3470..af0d10be 100644
--- a/src/InteractiveSprite.ts
+++ b/src/InteractiveSprite.ts
@@ -16,8 +16,7 @@ class InteractiveSprite<Value, Model extends ClickableObject<Value>>
   extends Sprite
   implements IClickableObject3D<Value>
 {
-  public model: Model;
-
+  readonly model: Model;
   constructor(
     material: StateMaterialSet,
     ctor: ModelConstructor<Model, Value>
diff --git a/src/RadioButtonObject.ts b/src/RadioButtonObject.ts
index bd0cd248..6ea59114 100644
--- a/src/RadioButtonObject.ts
+++ b/src/RadioButtonObject.ts
@@ -1,7 +1,7 @@
 import { CheckBoxObject, RadioButtonMesh, RadioButtonSprite } from "./";
 
 export class RadioButtonObject<Value> extends CheckBoxObject<Value> {
-  declare view: RadioButtonMesh<Value> | RadioButtonSprite<Value>;
+  declare readonly view: RadioButtonMesh<Value> | RadioButtonSprite<Value>;
   protected _isFrozen: boolean = false;
 
   /**

From a7621ff7c88713b8aacc9d048b3175b8f0c82222 Mon Sep 17 00:00:00 2001
From: MasatoMakino <makino.masato.g@gmail.com>
Date: Sat, 18 Mar 2023 07:29:03 +0900
Subject: [PATCH 2/2] change : ThreeMouseEvent.model and .isSelected to
 readonly

---
 src/ThreeMouseEvent.ts | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/ThreeMouseEvent.ts b/src/ThreeMouseEvent.ts
index da5cf2bf..60fffa3b 100644
--- a/src/ThreeMouseEvent.ts
+++ b/src/ThreeMouseEvent.ts
@@ -3,8 +3,8 @@ import { ClickableObject, IClickableObject3D } from "./";
 
 export interface ThreeMouseEvent<Value> extends Event {
   type: ThreeMouseEventType;
-  model?: ClickableObject<Value>;
-  isSelected?: boolean;
+  readonly model?: ClickableObject<Value>;
+  readonly isSelected?: boolean;
 }
 
 export class ThreeMouseEventUtil {
@@ -12,15 +12,19 @@ export class ThreeMouseEventUtil {
     type: ThreeMouseEventType,
     modelOrView: ClickableObject<Value> | IClickableObject3D<Value> | undefined
   ): ThreeMouseEvent<Value> {
-    const e: ThreeMouseEvent<Value> = {
-      type,
-      model: ThreeMouseEventUtil.getModel(modelOrView),
+    const model = ThreeMouseEventUtil.getModel(modelOrView);
+    const getSelection = () => {
+      if (type === "select") {
+        return ThreeMouseEventUtil.getSelection(model);
+      }
+      return undefined;
     };
 
-    if (type === "select") {
-      e.isSelected = ThreeMouseEventUtil.getSelection(e.model);
-    }
-    return e;
+    return {
+      type,
+      model,
+      isSelected: getSelection(),
+    };
   }
 
   private static getModel<Value>(