Size of file in bytes in QTreeView

antolSergeich

Help!

How can I show size of files in bytes in QTreeView?

Now it show in KB or GB.

Jeroentjehome

Hi there, the QFileInfo class gives the size in bytes. How do you use the QTreeView? What model is connected to it?
Bit of code would help.

antolSergeich

Sorry for rude english.

I do it like this:
@
QDirModel* model = new QDirModel(this);

ui->treeView->setModel(model->index(dir));
ui->treeView->setRootIndex(index);
@

I've tried many ways, but have no answer.

Later I find in Qt source code, that in qdirmodel.cpp lie this awful thing:
@
QString QDirModelPrivate::size(const QModelIndex &index) const
{
const QDirNode *n = node(index);
if (n->info.isDir()) {
#ifdef Q_OS_MAC
return QLatin1String("--");
#else
return QLatin1String("");
#endif
// Windows - ""
// OS X - "--"
// Konqueror - "4 KB"
// Nautilus - "9 items" (the number of children)
}

// According to the Si standard KB is 1000 bytes, KiB is 1024
// but on windows sizes are calulated by dividing by 1024 so we do what they do.
const quint64 kb = 1024;
const quint64 mb = 1024 * kb;
const quint64 gb = 1024 * mb;
const quint64 tb = 1024 * gb;
quint64 bytes = n->info.size();
if (bytes >= tb)
    return QFileSystemModel::tr("%1 TB").arg(QLocale().toString(qreal(bytes) / tb, 'f', 3));
if (bytes >= gb)
    return QFileSystemModel::tr("%1 GB").arg(QLocale().toString(qreal(bytes) / gb, 'f', 2));
if (bytes >= mb)
    return QFileSystemModel::tr("%1 MB").arg(QLocale().toString(qreal(bytes) / mb, 'f', 1));
if (bytes >= kb)
    return QFileSystemModel::tr("%1 KB").arg(QLocale().toString(bytes / kb));
return QFileSystemModel::tr("%1 byte(s)").arg(QLocale().toString(bytes));

}
@

And no way, only rebild Qt.

Sir.Costy

QString sizeFormat(quint64 size)
{
    qreal calc = size;
    QStringList list;
    list << "KB" << "MB" << "GB" << "TB";

    QStringListIterator i(list);
    QString unit("byte(s)");

    while(calc >= 1024.0 && i.hasNext())
    {
        unit = i.next();
        calc /= 1024.0;
    }

    return QString().setNum(calc, 'f', 2) + " " + unit;
}