Update QTreeView on add data to subitem

[klynxe]

I have a QTreeView with data
item 1
subitem 1-1
sub sub item 1-1-1
sub sub item 1-1-2
sub sub item 1-1-3
item 2
I have a model from QAbstractItemModel
When I add new sub item 2-1 to item 2 my tree view update good, but when I try add data to item, whitch already have data (for example add subitem 1-2 to item 1) my view doesn't update (item is invisible in view tree). How I can correct this?
I try use dataChanged, but I can use it for 1st level of tree only. I don't now how use it for subitem

void ModelTreeObject::insertOrUpdate(QVector<TreeData*> &treeDatas)
{
    foreach (TreeData* treeData, treeDatas) {        
        bool update = false;
        for(int i = 0; i < rootItem->childCount(); i++)
        {
            if(rootItem->child(i)->id() == treeData->id)//update
            {

                rootItem->child(i)->setData(treeData);
                update = true;
                emit dataChanged(index(i,0), index(i,4));
                break;
            }
        }
        if(!update)
        {
            beginInsertRows(QModelIndex(),rootItem->childCount(),rootItem->childCount());
            rootItem->insertChildren(rootItem->childCount(), treeData);
            endInsertRows();

        }
    }
}

void ModelTreeObject::remove(quint64 id)
{
    for(int i = 0; i < rootItem->childCount(); i++)
    {
        if(rootItem->child(i)->id() == id)
        {
            beginRemoveRows(QModelIndex(),i,i);
            rootItem->removeChildren(i,1);
            endRemoveRows();
            break;
        }
    }
}

[JonB]

@klynxe said in Update QTreeView on add data to subitem:

emit dataChanged(index(i,0), index(i,4));

I could be wrong ( :) ), but where do you get that index() from? QModelIndex() takes a parent, which is needed for non-top-level items. In a tree view I think you must use for sub-items?

[VRonin]

@klynxe said in Update QTreeView on add data to subitem:

emit dataChanged(index(i,0), index(i,4));

You are passing the wrong a indexes. Those are 4 columns in the top level, you should pass 1 more argument specifying the parent to each index() call