/*!
Inserts \a count columns into the model at position \a column. The
\a parent parameter must always be an invalid QModelIndex, since
the model does not support parent-child relationships.
Returns true if \a column is within bounds; otherwise returns false.
By default, inserted columns are empty. To fill them with data,
reimplement data() and handle any inserted column separately:
\snippet doc/src/snippets/sqldatabase/sqldatabase.cpp 23
\sa removeColumns()
*/
bool QSqlQueryModel::insertColumns(int column, int count, const QModelIndex &parent)
{
Q_D(QSqlQueryModel);
if (count <= 0 || parent.isValid() || column < 0 || column > d->rec.count())
return false;
beginInsertColumns(parent, column, column + count - 1);
for (int c = 0; c < count; ++c) {
QSqlField field;
field.setReadOnly(true);
field.setGenerated(false);
d->rec.insert(column, field);
if (d->colOffsets.size() < d->rec.count()) {
int nVal = d->colOffsets.isEmpty() ? 0 : d->colOffsets[d->colOffsets.size() - 1];
d->colOffsets.append(nVal);
Q_ASSERT(d->colOffsets.size() >= d->rec.count());
}
for (int i = column + 1; i < d->colOffsets.count(); ++i)
++d->colOffsets[i];
}
endInsertColumns();
return true;
}
