c++ 主窗口里面的菜单如何脱离主窗口

Question

如何让下面这个窗口脱离主窗口，打开老是在主窗口里面，拖动拖不出来，只能在主窗口里面移动。

```c++

class Menu
{
public:
    static void DrawMain(const ImFontAtlas* FontAtlas)
    {
        ImGui::PushFont(FontAtlas->Fonts[3]);

        MenuPlayerLists::Render(FontAtlas);

        ImGui::PopFont();
        if (GameData.Config.Window.Setting)
        {
            ImGui::PushFont(FontAtlas->Fonts[2]);
            const ImVec2 Spacing = ImGui::GetStyle().ItemSpacing;
            ImGui::SetNextWindowViewport(ImGui::GetMainViewport()->ID);
            ImGui::SetNextWindowSize({ Style::Window::Size.x + Spacing.x, Style::Window::Size.y + Spacing.y });

            ImGui::Begin(U8("窗口2"), &GameData.Config.Window.Setting, ImGuiWindowFlags_NoDocking | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoResize);
            {
                ImVec2 Pos = ImGui::GetWindowPos();
                ImVec2 OPos = Pos;
                Pos.x += Spacing.x / 2;
                Pos.y += Spacing.y / 2;
                
                ImGui::GetWindowDrawList()->AddRectFilled(Pos, ImVec2(Pos.x + Style::Window::Size.x, Pos.y + Style::Window::Size.y), ImGui::GetColorU32(Style::Window::Background), Style::Window::Rounding);
                
                ImGui::SetCursorPos(ImVec2(Style::Padding + Spacing.x / 2, Style::Padding));
                ImGui::PushFont(FontAtlas->Fonts[1]);
                ImGui::PopFont();

```

Answer 1

你这个当然拖动不出来，你应该使用标准的windows窗口作为菜单。