qresource_iterator.cpp

奇趣公司比较新的qt/emd版本

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#include "qresource.h"
#include "qresource_iterator_p.h"

#include <QtCore/qvariant.h>

QResourceFileEngineIterator::QResourceFileEngineIterator(QDir::Filters filters,
                                                         const QStringList &filterNames)
    : QAbstractFileEngineIterator(filters, filterNames), index(-1)
{
}

QResourceFileEngineIterator::~QResourceFileEngineIterator()
{
}

QString QResourceFileEngineIterator::next()
{
    if (!hasNext())
        return QString();
    ++index;
    return currentFilePath();
}

bool QResourceFileEngineIterator::hasNext() const
{
    if (index == -1) {
        // Lazy initialization of the iterator
        QResource resource(path());
        if (!resource.isValid())
            return false;

        // Initialize and move to the next entry.
        QResourceFileEngineIterator *that = const_cast<QResourceFileEngineIterator *>(this);
        that->entries = resource.children();
        if (!that->entries.isEmpty())
            that->index = 0;
    }

    return index <= entries.size();
}

QString QResourceFileEngineIterator::currentFileName() const
{
    if (index <= 0 || index > entries.size())
        return QString();
    return entries.at(index - 1);
}