#include <QtWidgets/QtWidgets>

int main(int argc, char *argv[])
{
  QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
  QApplication app(argc, argv);
  QWidget wdg;
  QGridLayout *l = new QGridLayout(&wdg);
  l->addWidget(new QLabel("Here we have quite a long text in a layout!"), 0 , 0, 1, 1);
  l->addWidget(new QLabel("This text is even longer coz width matters in this issue"), 1 , 1, 1, 1);
  l->setSizeConstraint(QLayout::SetFixedSize);
  wdg.show();
  app.exec();
}