Qt 5.9 | Qt Widgets | I18N Example | mainwindow.cpp Example File

Qt 5.9.9 Reference Documentation

# mainwindow.cpp Example File

tools/i18n/mainwindow.cpp

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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);
      }