src_corelib_io_qabstractfileengine.cpp

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class ZipEngineHandler : public QAbstractFileEngineHandler
{
public:
    QAbstractFileEngine *create(const QString &fileName) const override;
};
 
QAbstractFileEngine *ZipEngineHandler::create(const QString &fileName) const
{
    // ZipEngineHandler returns a ZipEngine for all .zip files
    return fileName.toLower().endsWith(".zip") ? new ZipEngine(fileName) : 0;
}
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
 
    ZipEngineHandler engine;
 
    MainWindow window;
    window.show();
 
    return app.exec();
}
 
 
QAbstractSocketEngine *ZipEngineHandler::create(const QString &fileName) const
{
    // ZipEngineHandler returns a ZipEngine for all .zip files
    return fileName.toLower().endsWith(".zip") ? new ZipEngine(fileName) : 0;
}
 
 
QAbstractFileEngineIterator *
CustomFileEngine::beginEntryList(QDir::Filters filters, const QStringList &filterNames)
{
    return new CustomFileEngineIterator(filters, filterNames);
}
 
 
class CustomIterator : public QAbstractFileEngineIterator
{
public:
    CustomIterator(const QStringList &nameFilters, QDir::Filters filters)
        : QAbstractFileEngineIterator(nameFilters, filters), index(0)
    {
        // In a real iterator, these entries are fetched from the
        // file system based on the value of path().
        entries << "entry1" << "entry2" << "entry3";
    }
 
    bool hasNext() const override
    {
        return index < entries.size() - 1;
    }
 
    QString next() override
    {
       if (!hasNext())
           return QString();
       ++index;
       return currentFilePath();
    }
 
    QString currentFileName() override
    {
        return entries.at(index);
    }
 
private:
    QStringList entries;
    int index;
};