Qt5.6: TreeView not updating?

[HennsWoerst]

Hello!

I am aware that Qt5.6 is currently in alpha, but I need the "setRootIndex()" method for my project. My problem is that the view is not updating (only if I close the treebranch and reopen it, I can see the changed value). I am pretty sure that I implemented the model correctly and was wondering, if this is a known issue?

Here's some code:

The View:

@
TreeView {
id: treeView

anchors.fill: parent
anchors.margins: 1
headerVisible: false
backgroundVisible: false
alternatingRowColors: false
frameVisible: false

model: treeModel

selection: ItemSelectionModel {
    model: treeModel
}

TableViewColumn {
    role: "baseName"
}

}
@

I hand the new data over to C++ and do:

@
m_model->setData(m_index, m_newName, TreeModel::BaseNameRole);
@

In the model:

@
bool TreeModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
if (!index.isValid())
return false;

TreeItem* item = getItem(index);

switch (role)
{
case BaseNameRole:
	item->setBaseName(value.toString());
	break;

case ValueRole:
	item->setValue(value);
	break;

case MetaDataRole:
	item->setMetaData(value.toMap());
	break;
}

emit dataChanged(index, index);

return true;

}
@

Still, the changes do not show up until I open and close the treebranch. Is this a bug in the TreeView?