How to show the drive size in QDirModel

hello everyone,
I want to show the drive size in QDirModel. I try to rewrite the "SetData" function, but the parameter "value" is a quote, I cant change its value. how can I do it ? thanks.

note:
setData: setData(const QModelIndex &index, const QVariant &value, int role)

Attachment 10750

What do you mean by -

Quote:

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but the parameter "value" is a quote

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The parameter value is const in the arguments and you wont be able to change its value inside the function.

But you can always pass data to it right...

Code:

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QVariant var = 23;
model->setData(index, var, role);

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:rolleyes:

Thanks your reply.
But have a problem, the drive size in the second column , the setData have not the parameter "column". I want to show the drive size in the second column and how can I do it. thanks.

oh, I see. I try .thanks.

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Added after 1 14 minutes:

I use this:
model->setData(dirModelIndex,drivesize);

and in setData function:

QString driveName = index.data().toString();
QModelIndex child;
if (driveName.length() > 1 && driveName.at(1) == QLatin1Char(':'))
{
qDebug() << "set drive size";
child = QDirModel::index(index.row(), 1, index);
setData(child, value,role);
emit dataChanged(index, index);
return true;
}

but it not effect. how can I do it? thanks.