QTreeView: How to refresh the view?

[Kira]

Hi,

I am using a QTreeView with an QAbstractItemModel to display my data.
My data changes sometimes and I need to inform the QTreeView about the changed data, how do I do this?

For example, when I first call setModel() on the QTreeView there is no data.
After this I add ~20 items to the data list.. but the QTreeView doesn't refresh...

I tried to emit "dataChanged" and "layoutChanged", but it didn't work.. my current workarround is:

treeView->setModel(NULL);
treeView->setModel(&model);

treeView->setModel(NULL);
treeView->setModel(&model);

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what's the correct way to do this?

Kira