5 files changed, 10 insertions, 4 deletions
diff --git a/include/cru/ui/controls/Button.h b/include/cru/ui/controls/Button.h
index 80d21d08..5ae3de49 100644
--- a/include/cru/ui/controls/Button.h
+++ b/include/cru/ui/controls/Button.h
@@ -14,7 +14,6 @@ class CRU_UI_API Button : public SingleChildControl<render::BorderRenderObject>,
 
  public:
   Button();
-  ~Button() override;
 
  public:
   helper::ClickState GetClickState() override {
diff --git a/include/cru/ui/controls/CheckBox.h b/include/cru/ui/controls/CheckBox.h
index 2e4685d5..16fe0725 100644
--- a/include/cru/ui/controls/CheckBox.h
+++ b/include/cru/ui/controls/CheckBox.h
@@ -15,7 +15,6 @@ class CRU_UI_API CheckBox : public Control,
   static constexpr auto kControlName = "CheckBox";
 
   CheckBox();
-  ~CheckBox() override;
 
   render::RenderObject* GetRenderObject() override {
     return &container_render_object_;
diff --git a/include/cru/ui/controls/Control.h b/include/cru/ui/controls/Control.h
index 8cd7a375..aa1cef8a 100644
--- a/include/cru/ui/controls/Control.h
+++ b/include/cru/ui/controls/Control.h
@@ -12,6 +12,11 @@
 
 namespace cru::ui::controls {
 
+struct ControlHostChangeEventArgs {
+  ControlHost* old_host;
+  ControlHost* new_host;
+};
+
 /**
  *  \remarks If you want to write a new control. You should override following
  * methods:
@@ -143,6 +148,8 @@ class CRU_UI_API Control : public Object,
   CRU_DEFINE_ROUTED_EVENT(GainFocus, events::FocusChangeEventArgs)
   CRU_DEFINE_ROUTED_EVENT(LoseFocus, events::FocusChangeEventArgs)
 
+  CRU_DEFINE_EVENT(ControlHostChange, const ControlHostChangeEventArgs&)
+
   //*************** region: tree ***************
  protected:
   virtual void OnParentChanged(Control* old_parent, Control* new_parent);
diff --git a/include/cru/ui/controls/IconButton.h b/include/cru/ui/controls/IconButton.h
index b061bc87..5b0f899d 100644
--- a/include/cru/ui/controls/IconButton.h
+++ b/include/cru/ui/controls/IconButton.h
@@ -21,7 +21,6 @@ class CRU_UI_API IconButton : public Control,
  public:
   IconButton();
   IconButton(std::string_view icon_svg_path_data_string, const Rect& view_port);
-  ~IconButton() override;
 
   render::RenderObject* GetRenderObject() override {
     return &container_render_object_;
diff --git a/include/cru/ui/controls/Window.h b/include/cru/ui/controls/Window.h
index 131d68a8..355b03a9 100644
--- a/include/cru/ui/controls/Window.h
+++ b/include/cru/ui/controls/Window.h
@@ -24,8 +24,9 @@ class CRU_UI_API Window
 
   Window();
 
-  static Window* CreatePopup();
+  static Window* CreatePopup(Control* attached_control);
 
+  Control* GetAttachedControl();
   void SetAttachedControl(Control* control);
 
   platform::gui::INativeWindow* GetNativeWindow();
@@ -36,6 +37,7 @@ class CRU_UI_API Window
   std::unique_ptr<ControlHost> control_host_;
 
   Control* attached_control_;
+  EventHandlerRevokerGuard parent_window_guard_;
 
   EventHandlerRevokerListGuard
       gain_focus_on_create_and_destroy_when_lose_focus_event_guard_;