[nostalgia/studio] Start on ImGui version of Studio

src/nostalgia/studio/projecttreemodel.cpp

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2016 - 2021 gary@drinkingtea.net
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <imgui.h>
+
+#include "projecttreemodel.hpp"
+
+namespace nostalgia {
+
+ProjectTreeModel::ProjectTreeModel(const ox::String &name,
+                                   ox::Vector<ox::UniquePtr<ProjectTreeModel>> children) noexcept {
+	m_name = name;
+	m_children = std::move(children);
+}
+
+ProjectTreeModel::ProjectTreeModel(ProjectTreeModel &&other) noexcept {
+	m_name = std::move(other.m_name);
+	m_children = std::move(other.m_children);
+}
+
+void ProjectTreeModel::draw(core::Context *ctx) noexcept {
+	constexpr auto dirFlags = ImGuiTreeNodeFlags_OpenOnArrow | ImGuiTreeNodeFlags_OpenOnDoubleClick;
+	if (m_children.size()) {
+		if (ImGui::TreeNodeEx(m_name.c_str(), dirFlags)) {
+			for (auto &child : m_children) {
+				child->draw(ctx);
+			}
+			ImGui::TreePop();
+		}
+	} else {
+		if (ImGui::TreeNodeEx(m_name.c_str(), ImGuiTreeNodeFlags_Leaf)) {
+			ImGui::TreePop();
+		}
+	}
+}
+
+}