2 files changed, 6 insertions, 18 deletions
diff --git a/include/cru/ui/controls/RootControl.hpp b/include/cru/ui/controls/RootControl.hpp
index 44722cef..823b9f03 100644
--- a/include/cru/ui/controls/RootControl.hpp
+++ b/include/cru/ui/controls/RootControl.hpp
@@ -2,6 +2,7 @@
 #include "LayoutControl.hpp"
 
 #include "cru/common/Base.hpp"
+#include "cru/common/Event.hpp"
 #include "cru/platform/gui/Base.hpp"
 #include "cru/ui/Base.hpp"
 #include "cru/ui/host/WindowHost.hpp"
@@ -9,8 +10,7 @@
 namespace cru::ui::controls {
 class RootControl : public LayoutControl {
  protected:
-  explicit RootControl(Control* attached_control,
-                       host::CreateWindowParams params);
+  explicit RootControl(Control* attached_control);
 
  public:
   CRU_DELETE_COPY(RootControl)
@@ -24,15 +24,13 @@ class RootControl : public LayoutControl {
   void SetGainFocusOnCreateAndDestroyWhenLoseFocus(bool value);
 
  private:
-  platform::gui::INativeWindow* GetNativeWindow(bool create);
-
- private:
   std::unique_ptr<host::WindowHost> window_host_;
 
   std::unique_ptr<render::StackLayoutRenderObject> render_object_;
 
   Control* attached_control_;
 
-  bool gain_focus_on_create_and_destroy_when_lose_focus_ = false;
+  EventRevokerListGuard
+      gain_focus_on_create_and_destroy_when_lose_focus_event_guard_;
 };
 }  // namespace cru::ui::controls
diff --git a/include/cru/ui/host/WindowHost.hpp b/include/cru/ui/host/WindowHost.hpp
index 6fb853b6..2fc174c6 100644
--- a/include/cru/ui/host/WindowHost.hpp
+++ b/include/cru/ui/host/WindowHost.hpp
@@ -16,21 +16,12 @@ class LayoutPaintCycler;
 
 struct AfterLayoutEventArgs {};
 
-struct CreateWindowParams {
-  CreateWindowParams(platform::gui::INativeWindow* parent = nullptr,
-                     platform::gui::CreateWindowFlag flag = {})
-      : parent(parent), flag(flag) {}
-
-  platform::gui::INativeWindow* parent;
-  platform::gui::CreateWindowFlag flag;
-};
-
 // The bridge between control tree and native window.
 class WindowHost : public Object {
   CRU_DEFINE_CLASS_LOG_TAG(u"cru::ui::host::WindowHost")
 
  public:
-  WindowHost(controls::Control* root_control, CreateWindowParams params);
+  explicit WindowHost(controls::Control* root_control);
 
   CRU_DELETE_COPY(WindowHost)
   CRU_DELETE_MOVE(WindowHost)
@@ -112,8 +103,7 @@ class WindowHost : public Object {
   void SetOverrideCursor(std::shared_ptr<platform::gui::ICursor> cursor);
 
  private:
-  gsl::not_null<platform::gui::INativeWindow*> CreateNativeWindow(
-      CreateWindowParams params);
+  gsl::not_null<platform::gui::INativeWindow*> CreateNativeWindow();
 
   //*************** region: native messages ***************
   void OnNativeDestroy(platform::gui::INativeWindow* window, std::nullptr_t);