Wt

#include <Wt/WApplication.h>

#include <Wt/WBootstrap5Theme.h>

#include <Wt/WServer.h>

#include <Wt/WContainerWidget.h>

#include <Wt/WTemplate.h>

#include <Wt/WLineEdit.h>

using namespace Wt;

// -----------------------------------------------------------------------------------

std::unique_ptr<WApplication> createHelloApplication(const WEnvironment &env)

{

    auto app = std::make_unique<WApplication>(env);

    auto theme = std::make_shared<WBootstrap5Theme>();

    app->setTheme(theme);

    WString floatTempl = "<form class='form-floating' id='floatingInputValue'> ${InputWidget}"

                         "<label for='floatingInputValue'>${MainLabel}</label> </form>";

    for (int i = 0; i < 5; i++)

    {

        auto userTemplate = app->root()->addWidget(std::make_unique<WTemplate>(floatTempl));

        userTemplate->addFunction("id", &WTemplate::Functions::id);

        userTemplate->setMargin(10, Side::Bottom);

        userTemplate->setMaximumSize(400, WLength::Auto);

        auto userEdit = userTemplate->bindWidget("InputWidget", std::make_unique<WLineEdit>());

        userEdit->setMaxLength(64);

        userEdit->setPlaceholderText(" ");  // Required damit es floated

        userTemplate->bindString("MainLabel", "Floating Label Field " + std::to_string(i));

    }

    return app;

}

// -----------------------------------------------------------------------------------

int main(int argc, char *argv[])

{

    try

    {

        WServer server(argc, argv, WTHTTP_CONFIGURATION);

        server.addEntryPoint(EntryPointType::Application,

                             std::bind(&createHelloApplication, std::placeholders::_1));

        if (server.start())

        {

          int sig = WServer::waitForShutdown();

          std::cerr << "*** Shutdown (signal = " << sig << ")" << std::endl;

          server.stop();

          if (sig == 1) // SIGHUP

            WServer::restart(argc, argv, environ);

          return 0;

        }

    }

    catch (WServer::Exception &e)

    {

        std::cerr << "*** Server Exception: " << e.what() << std::endl;

    }

    catch (std::exception &e)

    {

        std::cerr << "*** Std Exception: " << e.what() << std::endl;

    }

}