QTreeView & QAbstractItemModel & insertRow

Question

I am trying to implement QAbstractItemModel for QTreeView. I have a problem inserting rows. I noticed that if I paste at the beginning of my application, everything works fine. But if I insert lines later - after some other operations (for example, selection, etc.) New elements remain invisible. Moreover, QTreeView doesn't seem to work at all! Do I have to emit some signals to notify QTreeView of row insertion?

This is my insert method:

bool LayersModel::insertRows(int position, int count, const QModelIndex  & parent)
{
    LayersModelItem * parentItem = getItem(parent);
    if (position > parentItem->childCount())
        return false;
    beginInsertRows(parent,position,position+count-1);
    bool result = true;
    for (;count;--count)
        result &= parentItem->insertChildren(position, new LayersModelItem());
    endInsertRows();
    return result;
}

LayersModelItem is a class with a QList with its children and data.

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!

Answer 1

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