mainwindow.cpp Example File

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  #include <QtWidgets>

  #include "mainwindow.h"

  static const char * const listEntries[] = {
      QT_TRANSLATE_NOOP("MainWindow", "First"),
      QT_TRANSLATE_NOOP("MainWindow", "Second"),
      QT_TRANSLATE_NOOP("MainWindow", "Third"),
      0
  };

  MainWindow::MainWindow()
  {
      centralWidget = new QWidget;
      setCentralWidget(centralWidget);

      createGroupBox();

      listWidget = new QListWidget;
      for (int i = 0; listEntries[i]; ++i)
          listWidget->addItem(tr(listEntries[i]));

      QVBoxLayout *mainLayout = new QVBoxLayout;
      mainLayout->addWidget(groupBox);
      mainLayout->addWidget(listWidget);
      centralWidget->setLayout(mainLayout);

      exitAction = new QAction(tr("E&xit"), this);
      connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));

      fileMenu = menuBar()->addMenu(tr("&File"));
      fileMenu->setPalette(QPalette(Qt::red));
      fileMenu->addAction(exitAction);

      setWindowTitle(tr("Language: %1").arg(tr("English")));
      statusBar()->showMessage(tr("Internationalization Example"));

      if (tr("LTR") == "RTL")
          setLayoutDirection(Qt::RightToLeft);
  }

  void MainWindow::createGroupBox()
  {
      groupBox = new QGroupBox(tr("View"));
      perspectiveRadioButton = new QRadioButton(tr("Perspective"));
      isometricRadioButton = new QRadioButton(tr("Isometric"));
      obliqueRadioButton = new QRadioButton(tr("Oblique"));
      perspectiveRadioButton->setChecked(true);

      QVBoxLayout *groupBoxLayout = new QVBoxLayout;
      groupBoxLayout->addWidget(perspectiveRadioButton);
      groupBoxLayout->addWidget(isometricRadioButton);
      groupBoxLayout->addWidget(obliqueRadioButton);
      groupBox->setLayout(groupBoxLayout);
  }