CodecController.cpp Example File

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    #include "CodecController.hpp"

    using namespace bb::cascades;

    Q_DECLARE_METATYPE(QTextCodec*)

    CodecController::CodecController(QObject *parent)
        : QObject(parent)
        , m_fileList(0)
        , m_codecList(0)
    {
    }

    void CodecController::setFileList(DropDown *fileList)
    {
        if (m_fileList != fileList) {
            m_fileList = fileList;

            fillFileList();

            emit fileListChanged();
        }
    }

    DropDown* CodecController::fileList() const
    {
        return m_fileList;
    }

    void CodecController::setCodecList(DropDown *codecList)
    {
        if (m_codecList != codecList) {
            m_codecList = codecList;

            fillCodecList();

            emit codecListChanged();
        }
    }

    DropDown* CodecController::codecList() const
    {
        return m_codecList;
    }

    QString CodecController::fileContent() const
    {
        return m_fileContent;
    }

    void CodecController::updateFileContent()
    {
        if (!m_fileList || !m_codecList)
            return;

        // Check whether the user has selected a file already
        const int selectedIndex = m_fileList->selectedIndex();
        if (selectedIndex == DropDown::SelectedIndexNone)
            return;

        // Retrieve the selected Options from the file and codec DropDowns
        const Option *selectedFileOption = m_fileList->at(selectedIndex);
        const Option *selectedCodecOption = m_codecList->at(m_codecList->selectedIndex());

        // Extract the values associated with the selected Options
        const QString fileName = selectedFileOption->value().toString();
        QTextCodec *codec = selectedCodecOption->value().value<QTextCodec*>();

        // Open the selected file ...
        QFile file(fileName);
        if (!file.open(QIODevice::ReadOnly))
            return;

        // ... set a QTextStream with the selected codec on it ...
        QTextStream stream(&file);
        stream.setAutoDetectUnicode(false);
        stream.setCodec(codec);

        // ... and read out the decoded content
        m_fileContent = stream.readAll();

        emit fileContentChanged();
    }

    void CodecController::fillFileList()
    {
        if (!m_fileList)
            return;

        const QStringList fileNames = QStringList()
            << "iso-8859-1.txt"
            << "iso-8859-15.txt"
            << "utf-16.txt"
            << "utf-16be.txt"
            << "utf-16le.txt"
            << "utf-8.txt";

        // Clear the file DropDown
        m_fileList->removeAll();

        // Create one entry for each file
        foreach (const QString fileName, fileNames) {
            Option *option = new Option;
            option->setText(fileName);
            option->setValue(QString("app/native/assets/encodedfiles/%1").arg(fileName));
            m_fileList->add(option);
        }
    }

    void CodecController::fillCodecList()
    {
        if (!m_codecList)
            return;

        // Clear the codec DropDown
        m_codecList->removeAll();

        // Create one entry for each codec available on the system
        foreach (int mib, QTextCodec::availableMibs()) {
            QTextCodec *codec = QTextCodec::codecForMib(mib);

            Option *option = new Option;
            option->setText(codec->name());
            option->setValue(QVariant::fromValue(codec));

            // pre-select the UTF-8 codec in the DropDown
            if (codec->name() == "UTF-8")
                option->setSelected(true);

            m_codecList->add(option);
        }
    }