qt-creator/tests/manual/layoutbuilder/comparison/widgets/mainwindow.cpp

//#include "mainwindow.h"

//#include <QApplication>
//#include <QPushButton>
//#include <QTextEdit>
//#include <QVBoxLayout>

//ApplicationWindow::ApplicationWindow()
//{
//    resize(600, 400);
//    setWindowTitle("Hello World");

//    auto textEdit = new QTextEdit;
//    textEdit->setText("Hallo");

//    auto pushButton = new QPushButton("Quit");

//    auto l = new QVBoxLayout(this);
//    l->addWidget(textEdit);
//    l->addWidget(pushButton);

//    connect(pushButton, &QPushButton::clicked,
//            qApp, &QCoreApplication::quit);
//}