[studio] Add drag/drop functions that use model TypeName for name

src/olympic/studio/modlib/include/studio/imguiutil.hpp

@@ -34,19 +34,37 @@ ox::Result<T> getDragDropPayload(ox::CStringViewCR name) noexcept {
 			static_cast<size_t>(payload->DataSize)});
 }
 
+template<typename T>
+ox::Result<T> getDragDropPayload() noexcept {
+	auto const payload = ImGui::AcceptDragDropPayload(ox::ModelTypeName_v<T>);
+	if (!payload) {
+		return ox::Error(1, "No drag/drop payload");
+	}
+	return ox::readClaw<T>({
+			reinterpret_cast<char const*>(payload->Data),
+			static_cast<size_t>(payload->DataSize)});
+}
+
 ox::Error setDragDropPayload(ox::CStringViewCR name, auto const&obj) noexcept {
 	OX_REQUIRE(buff, ox::writeClaw(obj, ox::ClawFormat::Metal));
 	ImGui::SetDragDropPayload(name.c_str(), buff.data(), buff.size());
 	return {};
 }
 
+template<typename T>
+ox::Error setDragDropPayload(T const&obj) noexcept {
+	OX_REQUIRE(buff, ox::writeClaw(obj, ox::ClawFormat::Metal));
+	ImGui::SetDragDropPayload(ox::ModelTypeName_v<T>, buff.data(), buff.size());
+	return {};
+}
+
 
 class DragDropSource {
 	private:
 		bool const m_active{};
 	public:
-		DragDropSource() noexcept:
-			m_active(ImGui::BeginDragDropSource()) {
+		DragDropSource(ImGuiDragDropFlags const flags = 0) noexcept:
+			m_active(ImGui::BeginDragDropSource(flags)) {
 		}
 		~DragDropSource() noexcept {
 			if (m_active) {
@@ -58,14 +76,14 @@ class DragDropSource {
 		}
 };
 
-auto dragDropSource(auto const&cb) noexcept {
+auto dragDropSource(auto const&cb, ImGuiDragDropFlags const flags = 0) noexcept {
 	if constexpr(ox::is_same_v<decltype(cb()), ox::Error>) {
-		if (ig::DragDropSource const tgt; tgt) [[unlikely]] {
+		if (ig::DragDropSource const tgt{flags}; tgt) [[unlikely]] {
 			return cb();
 		}
 		return ox::Error{};
 	} else {
-		if (ig::DragDropSource const tgt; tgt) [[unlikely]] {
+		if (ig::DragDropSource const tgt{flags}; tgt) [[unlikely]] {
 			cb();
 		}
 	}