ftxui big text example

#include <ftxui/component/app.hpp>
#include <ftxui/component/component.hpp>
//#include <string_view>
#include <string>
#include <ranges>

using namespace ftxui;
using namespace std::literals::string_literals;
//using namespace std::literals::string_view_literals;

int main() {
    float scroll_x = 0.1f;
    float scroll_y = 0.1f;

    auto scrollable_content = [&]{
        auto bigtext = std::ranges::to<std::string>(
            std::ranges::views::indices(1000000)
                | std::ranges::views::transform([](const auto i) { return "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed "s + std::to_string(i); })
                | std::ranges::views::join_with("\n"s)
        );

        return Renderer([&, content = text(bigtext)] {
            return content | focusPositionRelative(scroll_x, scroll_y) |
                   frame | flex;
            });
    }();

    SliderOption<float> option_x;
    option_x.value = &scroll_x;
    option_x.min = 0.f;
    option_x.max = 1.f;
    option_x.increment = 0.1f;
    option_x.direction = Direction::Right;
    option_x.color_active = Color::Blue;
    option_x.color_inactive = Color::BlueLight;
    auto scrollbar_x = Slider(option_x);

    SliderOption<float> option_y;
    option_y.value = &scroll_y;
    option_y.min = 0.f;
    option_y.max = 1.f;
    option_y.increment = 0.1f;
    option_y.direction = Direction::Down;
    option_y.color_active = Color::Yellow;
    option_y.color_inactive = Color::YellowLight;
    auto scrollbar_y = Slider(option_y);

    auto root = Container::Vertical({
        Container::Horizontal({
            scrollable_content,
            scrollbar_y,
        }) | flex,
        Container::Horizontal({
            scrollbar_x,
            Renderer([] { return text(L"x"); }),
        }),
    });

    auto screen = App::Fullscreen();
    screen.Loop(root);

    return EXIT_SUCCESS;
}