diff --git a/src/widget_tree/widget_system.cpp b/src/widget_tree/widget_system.cpp
index cf273ff..21e57a2 100644
--- a/src/widget_tree/widget_system.cpp
+++ b/src/widget_tree/widget_system.cpp
@@ -57,6 +57,7 @@ widget_hit_test_system::~widget_hit_test_system() {
         window->on_mouse_button_up_delegate.remove_object(this);
         window->on_mouse_button_down_delegate.remove_object(this);
         window->on_mouse_button_dbl_delegate.remove_object(this);
+    	window->on_mouse_wheel_delegate.remove_object(this);
         window->on_mouse_leave_delegate.remove_object(this);
     }
 }
@@ -192,8 +193,8 @@ void widget_hit_test_system::process_mouse_button_down(const Eigen::Vector2f& in
  * @param in_window_pos 鼠标在窗口中的位置
  * @param in_button 双击的鼠标按钮
  */
-void widget_hit_test_system::process_mouse_button_dbl(const Eigen::Vector2f& in_window_pos, mouse_button in_button) {
-    if (auto last_hover_widget = widget_manager::get().get_component<widget_ptr>(last_hover_widget_)) {
+void widget_hit_test_system::process_mouse_button_dbl(const Eigen::Vector2f& in_window_pos, mouse_button in_button) const {
+    if (const auto last_hover_widget = widget_manager::get().get_component<widget_ptr>(last_hover_widget_)) {
         last_hover_widget->widget->on_double_click(last_hover_local_pos_, in_button);
     }
 }
@@ -203,8 +204,8 @@ void widget_hit_test_system::process_mouse_button_dbl(const Eigen::Vector2f& in_
  * @param in_window_pos 鼠标在窗口中的位置
  * @param in_wheel_event 滚轮事件
  */
-void widget_hit_test_system::process_mouse_wheel(const Eigen::Vector2f& in_window_pos, wheel_event in_wheel_event) {
-    if (auto last_hover_widget = widget_manager::get().get_component<widget_ptr>(last_hover_widget_)) {
+void widget_hit_test_system::process_mouse_wheel(const Eigen::Vector2f& in_window_pos, wheel_event in_wheel_event) const {
+    if (const auto last_hover_widget = widget_manager::get().get_component<widget_ptr>(last_hover_widget_)) {
         last_hover_widget->widget->on_mouse_wheel(last_hover_local_pos_, in_wheel_event);
     }
 }
@@ -290,8 +291,8 @@ hit_test_result widget_hit_test_system::perform_hit_test(
  * @brief 析构函数，移除窗口大小变化监听
  */
 widget_render_system::~widget_render_system() {
-    if (auto window = window_.lock()) {
-        window->on_resize_delegate.remove_object(this);
+    if (const auto window = window_.lock()) {
+    	window->on_resize_delegate.remove_object(this);
     }
 }
 
diff --git a/src/widget_tree/widget_system.h b/src/widget_tree/widget_system.h
index b71afdc..f893714 100644
--- a/src/widget_tree/widget_system.h
+++ b/src/widget_tree/widget_system.h
@@ -108,14 +108,14 @@ protected:
      * @param in_window_pos 鼠标在窗口中的位置
      * @param in_button 双击的鼠标按钮
      */
-    void process_mouse_button_dbl(const Eigen::Vector2f& in_window_pos, mouse_button in_button);
+    void process_mouse_button_dbl(const Eigen::Vector2f& in_window_pos, mouse_button in_button) const;
 
     /**
      * @brief 处理鼠标滚轮事件
      * @param in_window_pos 鼠标在窗口中的位置
      * @param in_wheel_event 滚轮事件
      */
-    void process_mouse_wheel(const Eigen::Vector2f& in_window_pos, wheel_event in_wheel_event);
+    void process_mouse_wheel(const Eigen::Vector2f& in_window_pos, wheel_event in_wheel_event) const;
 
     /**
      * @brief 处理鼠标离开窗口事件