Function ShowDemoWindowLayout

src-core/imgui/imgui_demo.cpp:2659–3470

}

static void ShowDemoWindowLayout()
{
    IMGUI_DEMO_MARKER("Layout");
    if (!ImGui::CollapsingHeader("Layout & Scrolling"))
        return;

    IMGUI_DEMO_MARKER("Layout/Child windows");
    if (ImGui::TreeNode("Child windows"))
    {
        ImGui::SeparatorText("Child windows");

        HelpMarker("Use child windows to begin into a self-contained independent scrolling/clipping regions within a host window.");
        static bool disable_mouse_wheel = false;
        static bool disable_menu = false;
        ImGui::Checkbox("Disable Mouse Wheel", &disable_mouse_wheel);
        ImGui::Checkbox("Disable Menu", &disable_menu);

        // Child 1: no border, enable horizontal scrollbar
        {
            ImGuiWindowFlags window_flags = ImGuiWindowFlags_HorizontalScrollbar;
            if (disable_mouse_wheel)
                window_flags |= ImGuiWindowFlags_NoScrollWithMouse;
            ImGui::BeginChild("ChildL", ImVec2(ImGui::GetContentRegionAvail().x * 0.5f, 260), false, window_flags);
            for (int i = 0; i < 100; i++)
                ImGui::Text("%04d: scrollable region", i);
            ImGui::EndChild();
        }

        ImGui::SameLine();

        // Child 2: rounded border
        {
            ImGuiWindowFlags window_flags = ImGuiWindowFlags_None;
            if (disable_mouse_wheel)
                window_flags |= ImGuiWindowFlags_NoScrollWithMouse;
            if (!disable_menu)
                window_flags |= ImGuiWindowFlags_MenuBar;
            ImGui::PushStyleVar(ImGuiStyleVar_ChildRounding, 5.0f);
            ImGui::BeginChild("ChildR", ImVec2(0, 260), true, window_flags);
            if (!disable_menu && ImGui::BeginMenuBar())
            {
                if (ImGui::BeginMenu("Menu"))
                {
                    ShowExampleMenuFile();
                    ImGui::EndMenu();
                }
                ImGui::EndMenuBar();
            }
            if (ImGui::BeginTable("split", 2, ImGuiTableFlags_Resizable | ImGuiTableFlags_NoSavedSettings))
            {
                for (int i = 0; i < 100; i++)
                {
                    char buf[32];
                    sprintf(buf, "%03d", i);
                    ImGui::TableNextColumn();
                    ImGui::Button(buf, ImVec2(-FLT_MIN, 0.0f));
                }
                ImGui::EndTable();