- Qt 5.5
- Qt Widgets
- I18N Example
- mainwindow.cpp Example File
- Qt 5.5.1 Reference Documentation

# mainwindow.cpp Example File

tools/i18n/mainwindow.cpp

    /****************************************************************************
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    ** This file is part of the examples of the Qt Toolkit.
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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);
    }