I have a QStandardItemModel and I need to iterate through it so I can write a custom format line to text file. Can't figure it out.

RobbieP

I have a QStandardItemModel that's been sorted into a QSortFilterProxyModel. I need to iterate through all of it's records and pull the data and create a text line that I can append to a file.

Here's my model:

QStandardItemModel *model = new QStandardItemModel(0, 3, parent);

model->setHeaderData(0, Qt::Horizontal, QObject::tr("Name"));
model->setHeaderData(1, Qt::Horizontal, QObject::tr("Data"));
model->setHeaderData(2, Qt::Horizontal, QObject::tr("Source"));

Here's some code I found in another answer elsewhere but it doesn't work:

// DO FILE WRITES
int n = proxyModel->sourceModel()->rowCount();
int m = proxyModel->sourceModel()->columnCount();
for (int i=0; i<n; ++i)
{
    for (int j=0; j<m; j++)
    {
        QMap thisItem = proxyModel->sourceModel()->itemData(proxyModel->sourceModel()->index(i,j));
        QString thisLine;
        thisLine = thisLine + thisItem + ",";
        textOut << thisLine;
    }
}
textOut << endl;

Anyone have any ideas?

RobbieP

I figured it out:

// DO FILE WRITES
int n = proxyModel->sourceModel()->rowCount();
int m = proxyModel->sourceModel()->columnCount();
for (int i=0; i<n; ++i)
{
    QString thisName = proxyModel->sourceModel()->data(proxyModel->sourceModel()->index(i, 0)).toString();
    QString thisValue = proxyModel->sourceModel()->data(proxyModel->sourceModel()->index(i, 1)).toString();
    QString thisSource = proxyModel->sourceModel()->data(proxyModel->sourceModel()->index(i, 2)).toString();
    QString thisLine;
    thisLine = thisLine + thisName + "," + thisValue + "," + thisSource + ",";
    textOut << thisLine;
}
textOut << endl;

JonB

@RobbieP
This is fine, but you should not have to do everything so long-windedly through proxyModel->sourceModel() calls. Did you try e.g.

int n = proxyModel->rowCount();
...
QString thisName = proxyModel->index(i, 0).data().toString();

Also note this outputs in the "sorted into a QSortFilterProxyModel" order, your original outputs in the underlying, unsorted QStandardItemModel order. Depends which you want.