mainwindow.cpp Example File

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  #include <QtWidgets>

  #include "mainwindow.h"
  #include "printpanel.h"

  MainWindow::MainWindow()
  {
      printPanel = new PrintPanel;
      setCentralWidget(printPanel);

      createActions();
      createMenus();

      setWindowTitle(tr("Troll Print 1.0"));
  }

  void MainWindow::about()
  {
      QMessageBox::information(this, tr("About Troll Print 1.0"),
                        tr("Troll Print 1.0.\n\n"
                        "Copyright 1999 Software, Inc."));
  }

  void MainWindow::createActions()
  {
      exitAct = new QAction(tr("E&xit"), this);
      exitAct->setShortcut(tr("Ctrl+Q", "Quit"));
      connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

      aboutAct = new QAction(tr("&About"), this);
      aboutAct->setShortcut(Qt::Key_F1);
      connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

      aboutQtAct = new QAction(tr("About &Qt"), this);
      connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
  }

  void MainWindow::createMenus()
  {
      QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
      fileMenu->addAction(exitAct);

      menuBar()->addSeparator();

      QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
      helpMenu->addAction(aboutAct);
      helpMenu->addAction(aboutQtAct);
  }