[olympic/modlib] Add ListBox to ImGui util

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

@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <functional>
+
 #include <imgui.h>
 
 #include <turbine/context.hpp>
@@ -59,6 +61,12 @@ bool FileComboBox(
 		ox::StringView fileExt,
 		size_t &selectedIdx) noexcept;
 
+bool ListBox(
+		ox::CStringView name,
+		std::function<ox::CStringView(size_t)> const&f,
+		size_t strCnt,
+		size_t &selIdx) noexcept;
+
 /**
  *
  * @param name

src/olympic/studio/modlib/src/imguiutil.cpp

@@ -113,24 +113,34 @@ bool FileComboBox(
 	return out;
 }
 
-bool ListBox(ox::CStringView name, ox::SpanView<ox::String> const&list, size_t &selIdx) noexcept {
+bool ListBox(
+		ox::CStringView name,
+		std::function<ox::CStringView(size_t)> const&f,
+		size_t strCnt,
+		size_t &selIdx) noexcept {
 	auto out = false;
 	if (ImGui::BeginListBox(name.c_str())) {
-		for (auto i = 0u; auto const&obj : list) {
+		for (auto i = 0u; i < strCnt; ++i) {
+			auto str = f(i);
 			ig::IDStackItem const idStackItem2(static_cast<int>(i));
-			if (ImGui::Selectable(obj.c_str(), selIdx == i)) {
+			if (ImGui::Selectable(str.c_str(), selIdx == i)) {
 				if (i != selIdx) {
 					selIdx = i;
 					out = true;
 				}
 			}
-			++i;
 		}
 		ImGui::EndListBox();
 	}
 	return out;
 }
 
+bool ListBox(ox::CStringView name, ox::SpanView<ox::String> const&list, size_t &selIdx) noexcept {
+	return ig::ListBox(name, [list](size_t i) -> ox::CStringView {
+		return list[i];
+	}, list.size(), selIdx);
+}
+
 
 FilePicker::FilePicker(
 		studio::StudioContext &sctx,