[olympic] Add more ImGui helpers, studio::Editor::pushCommand

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

@@ -131,6 +131,17 @@ class Editor: public studio::BaseEditor {
 		[[nodiscard]]
 		UndoStack *undoStack() noexcept final;
 
+		void pushCommand(ox::UPtr<UndoCommand> &&cmd) noexcept;
+
+		template<typename UC, typename ...Args>
+		void pushCommand(Args&&... args) noexcept {
+			try {
+				m_undoStack.push(ox::make_unique<UC>(ox::forward<Args>(args)...));
+			} catch (ox::Exception const&ex) {
+				oxLogError(ex.toError());
+			}
+		}
+
 	private:
 		ox::Error markUnsavedChanges(UndoCommand const*) noexcept;
 };

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

@@ -7,6 +7,7 @@
 #include <imgui.h>
 
 #include <turbine/context.hpp>
+#include <studio/context.hpp>
 
 namespace studio::ig {
 
@@ -52,4 +53,41 @@ bool BeginPopup(turbine::Context &ctx, ox::CStringView popupName, bool &show, Im
  */
 bool ComboBox(ox::CStringView lbl, ox::SpanView<ox::String> list, size_t &selectedIdx) noexcept;
 
+bool FileComboBox(
+		ox::CStringView lbl,
+		studio::StudioContext &sctx,
+		ox::StringView fileExt,
+		size_t &selectedIdx) noexcept;
+
+/**
+ *
+ * @param name
+ * @param list
+ * @param selIdx
+ * @return true if new value selected, false otherwise
+ */
+bool ListBox(ox::CStringView name, ox::SpanView<ox::String> const&list, size_t &selIdx) noexcept;
+
+class FilePicker {
+	private:
+		bool m_show{};
+		studio::StudioContext &m_sctx;
+		ox::String const m_title;
+		ox::String const m_fileExt;
+		ImVec2 const m_size;
+	public:
+		ox::Signal<ox::Error(ox::StringView)> filePicked;
+
+		FilePicker(
+				studio::StudioContext &sctx,
+				ox::String title,
+				ox::String fileExt,
+				ImVec2 const&size = {}) noexcept;
+
+		void draw() noexcept;
+
+		void show() noexcept;
+
+};
+
 }