initial commit; cv 0.0.3

Api/HorizontalBox.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include "PanelWidget.hpp"
+#include "HorizontalBoxSlot.hpp"
+
+namespace PalUIExtension::Api
+{
+    // UHorizontalBox : public UPanelWidget directly -- same shape as
+    // Overlay. Every generic panel operation is already on PanelWidget;
+    // AddChildToHorizontalBox exists only to hand back the concrete slot
+    // type instead of the generic UPanelSlot* AddChild() returns.
+    class HorizontalBox : public PanelWidget
+    {
+    public:
+        static auto ClassPath() -> const TCHAR* { return STR("/Script/UMG.HorizontalBox"); }
+        static auto DebugTag()  -> const TCHAR* { return STR("HorizontalBox"); }
+
+        HorizontalBox() = default;
+        explicit HorizontalBox(UObject* Obj)
+            : PanelWidget(Obj, ClassOf<HorizontalBox>(), DebugTag()) {}
+
+        auto AddChildToHorizontalBox(UObject* Content) -> HorizontalBoxSlot
+        {
+            struct P { UObject* Content; UObject* ReturnValue; } p{ Content, nullptr };
+            auto Result = CallForReturn(STR("AddChildToHorizontalBox"), p, &P::ReturnValue);
+            return (Result && *Result) ? HorizontalBoxSlot{ *Result } : HorizontalBoxSlot{};
+        }
+    };
+}