Method formatKey

src/3rdparty/QXlsx/source/xlsxformat.cpp:1168–1188

! * \internal */

 * \internal
 */
QByteArray Format::formatKey() const
{
	if (isEmpty())
		return QByteArray();

	if (d->dirty) {
		QByteArray key;
		QDataStream stream(&key, QIODevice::WriteOnly);

		QMapIterator<int, QVariant> i(d->properties);
		while (i.hasNext()) {
			i.next();
			stream<<i.key()<<i.value();
		}

		d->formatKey = key;
		d->dirty = false;
	}

	return d->formatKey;
}

/*!
 * \internal