initial commit; cv 0.0.3

Api/Overlay.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include "PanelWidget.hpp"
+#include "OverlaySlot.hpp"
+
+namespace PalUIExtension::Api
+{
+    // UOverlay : public UPanelWidget directly (confirmed by the header --
+    // no ContentWidget rung to skip here, unlike SizeBox). Every generic
+    // panel operation -- AddChild, GetChildAt, GetAllChildren,
+    // GetChildObjects -- is already on PanelWidget and works unchanged;
+    // AddChildToOverlay below is the one thing Overlay adds beyond that,
+    // and it exists only because the engine returns the concrete
+    // UOverlaySlot* type instead of the generic UPanelSlot* AddChild()
+    // returns, so you get typed access to Padding/Alignment without an
+    // extra cast.
+    class Overlay : public PanelWidget
+    {
+    public:
+        static auto ClassPath() -> const TCHAR* { return STR("/Script/UMG.Overlay"); }
+        static auto DebugTag()  -> const TCHAR* { return STR("Overlay"); }
+
+        Overlay() = default;
+        explicit Overlay(UObject* Obj)
+            : PanelWidget(Obj, ClassOf<Overlay>(), DebugTag()) {}
+
+        auto AddChildToOverlay(UObject* Content) -> OverlaySlot
+        {
+            struct P { UObject* Content; UObject* ReturnValue; } p{ Content, nullptr };
+            auto Result = CallForReturn(STR("AddChildToOverlay"), p, &P::ReturnValue);
+            return (Result && *Result) ? OverlaySlot{ *Result } : OverlaySlot{};
+        }
+    };
+}