Method show

example/save_load.cpp:39–114

    SaveLoadEditor() : nodes_(), links_(), current_id_(0) {}

    void show()
    {
        ImGui::Begin("Save & load example");
        ImGui::TextUnformatted("A -- add node");
        ImGui::TextUnformatted(
            "Close the executable and rerun it -- your nodes should be exactly "
            "where you left them!");

        ImNodes::BeginNodeEditor();

        if (ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows) &&
            ImNodes::IsEditorHovered() && ImGui::IsKeyReleased(SDL_SCANCODE_A))
        {
            const int node_id = ++current_id_;
            ImNodes::SetNodeScreenSpacePos(node_id, ImGui::GetMousePos());
            nodes_.push_back(Node(node_id, 0.f));
        }

        for (Node& node : nodes_)
        {
            ImNodes::BeginNode(node.id);

            ImNodes::BeginNodeTitleBar();
            ImGui::TextUnformatted("node");
            ImNodes::EndNodeTitleBar();

            ImNodes::BeginInputAttribute(node.id << 8);
            ImGui::TextUnformatted("input");
            ImNodes::EndInputAttribute();

            ImNodes::BeginStaticAttribute(node.id << 16);
            ImGui::PushItemWidth(120.f);
            ImGui::DragFloat("value", &node.value, 0.01f);
            ImGui::PopItemWidth();
            ImNodes::EndStaticAttribute();

            ImNodes::BeginOutputAttribute(node.id << 24);
            const float text_width = ImGui::CalcTextSize("output").x;
            ImGui::Indent(120.f + ImGui::CalcTextSize("value").x - text_width);
            ImGui::TextUnformatted("output");
            ImNodes::EndOutputAttribute();

            ImNodes::EndNode();
        }

        for (const Link& link : links_)
        {
            ImNodes::Link(link.id, link.start_attr, link.end_attr);
        }

        ImNodes::EndNodeEditor();

        {
            Link link;
            if (ImNodes::IsLinkCreated(&link.start_attr, &link.end_attr))
            {
                link.id = ++current_id_;
                links_.push_back(link);