Insert and delete rows in QTreeView - c++

Question

Good day, I Have base model inherited from QAbstractItemModel, and some background threads which notify this model from time to time, in examples the insertions rows implemens somthing like this
bool TreeModel::insertRows(int position, int rows, const QModelIndex &parent)
{
TreeItem *parentItem = getItem(parent);
bool success;
beginInsertRows(parent, position, position + rows - 1);
success = parentItem->insertChildren(position, rows, rootItem->columnCount());
endInsertRows();
return success;
}
But I can't do it like this because my model is single which uses 4 views, I've implemented my insertion this way:
void notifyEventImpl(file_item_type *sender,helper<ITEM_ACTION_ADDED>)
{
base_class::setSize(file_item_type::size()+sender->size());
m_listDirectory.push_back(sender);
file_item_type::filesystem_type::s_notify.insert(this); // notify my model
}
Where s_notify is a class with implementation:
void Notifaer::dataChange(void * item){emit dataChanged(item);}
void Notifaer::remove(void * item){emit removed(item);}
void Notifaer::insert(void * item){emit inserted(item);}
void Notifaer::push_back(const FileItemModel * model)
{
VERIFY(QObject::connect(this,SIGNAL(dataChanged(void*)),model,SLOT(dataChangeItem(void*)) ));
VERIFY(QObject::connect(this,SIGNAL(removed(void*)),model,SLOT(removeItem(void*)) ));
VERIFY(QObject::connect(this,SIGNAL(inserted(void*)),model,SLOT(insertItem(void*)) ));
}
Given this, I invoke the method:
void FileItemModel::insertItem(void *it)
{
file_item_type *item = dynamic_cast<file_item_type*>(static_cast<file_item_type*>(it));
{
QModelIndex index = createIndex(0,0,item);
if (index.isValid())
{
beginInsertRows(index, 0, item->childCount()-1);
endInsertRows();
}
}
}
void FileItemModel::removeItem(void *it)
{
file_item_type *item = static_cast<file_item_type*>(it);
{
QModelIndex index = createIndex(0,0,item);
if (index.isValid())
{
beginRemoveRows(index, 0, item->childCount()-1);
endRemoveRows();
}
}
}
Remove rows works perfectly, but insert does not work. What's wrong in my implementation?

Answer 1

Try with
beginInsertRows(QModelIndex(), 0, item->childCount()-1);
Have you checked QT doc http://qt-project.org/doc/qt-4.8/qabstractitemmodel.html or QT examples to get any clue http://qt-project.org/doc/qt-4.8/itemviews-editabletreemodel.html?
As you said threads, maybe this could be interesting to read:
Design Pattern, Qt Model/View and multiple threads
QTreeView & QAbstractItemModel & insertRow