// Copyright (C) 2016 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "mainwindow.h" #include "window.h" #include #include #include MainWindow::MainWindow() { QMenuBar *menuBar = new QMenuBar; QMenu *menuWindow = menuBar->addMenu(tr("&Window")); QAction *addNew = new QAction(menuWindow); addNew->setText(tr("Add new")); menuWindow->addAction(addNew); connect(addNew, &QAction::triggered, this, &MainWindow::onAddNew); setMenuBar(menuBar); onAddNew(); } void MainWindow::onAddNew() { if (!centralWidget()) setCentralWidget(new Window(this)); else QMessageBox::information(nullptr, tr("Cannot add new window"), tr("Already occupied. Undock first.")); }