1 files changed, 10 insertions, 0 deletions
diff --git a/include/cru/ui/host/WindowHost.h b/include/cru/ui/host/WindowHost.h
index d88482c4..0d2e0341 100644
--- a/include/cru/ui/host/WindowHost.h
+++ b/include/cru/ui/host/WindowHost.h
@@ -21,6 +21,14 @@ class CRU_UI_API WindowHost : public Object, public SelfResolvable<WindowHost> {
   friend controls::Control;
   CRU_DEFINE_CLASS_LOG_TAG(u"WindowHost")
 
+ private:
+  static int event_handling_depth_;
+
+ public:
+  static bool IsInEventHandling() { return event_handling_depth_ > 0; }
+  static void EnterEventHandling();
+  static void LeaveEventHandling();
+
  public:
   explicit WindowHost(controls::Control* root_control);
 
@@ -139,6 +147,8 @@ class CRU_UI_API WindowHost : public Object, public SelfResolvable<WindowHost> {
                                             const Point& point, bool no_leave,
                                             bool no_enter);
 
+  void OnControlDetach(controls::Control* control);
+
  private:
   controls::Control* root_control_ = nullptr;
   render::RenderObject* root_render_object_ = nullptr;