QHBoxLayout* layout;layout->setContentsMargins(0, 0, 0, 0);layout->setSpacing(0);layout->setMargin(0);QLabel* l1 = new QLabel("1");QLabel* l2 = new QLabel("2");QLabel* l3 = new QLabel("3");l1->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);l2->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);l3->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);layout->addWidget(l1, 0, Qt::AlignLeft);layout->addWidget(l2, 0, Qt::AlignLeft);layout->addWidget(l3, 0, Qt::AlignLeft);setLayout(layout);