[olympic/studio] Add PushButton, PopupBtns, ComboBox, and IDStackItem to ImGui utils

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

@@ -2,12 +2,42 @@
  * Copyright 2016 - 2024 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
+#pragma once
+
 #include <imgui.h>
 
 #include <turbine/context.hpp>
 
 namespace studio::ig {
 
+inline constexpr auto BtnSz = ImVec2{50, 22};
+
+template<typename T>
+class IDStackItem {
+	private:
+		T m_id;
+	public:
+		explicit IDStackItem(T id) noexcept: m_id(id) {
+			ImGui::PushID(m_id);
+		}
+		~IDStackItem() noexcept {
+			ImGui::PopID();
+		}
+};
+
 void centerNextWindow(turbine::Context &ctx) noexcept;
 
+bool PushButton(ox::CStringView lbl, ImVec2 const&btnSz = BtnSz) noexcept;
+
+void PopupBtns(float popupWidth, bool &popupOpen);
+
+/**
+ *
+ * @param lbl
+ * @param list
+ * @param selectedIdx
+ * @return true if new value selected, false otherwise
+ */
+bool ComboBox(ox::CStringView lbl, ox::SpanView<ox::String> list, size_t &selectedIdx) noexcept;
+
 }