TreeView as view for ComboBox

[niko]

Hello,

is this supported?

int main(int argc, char **argv)
{
    QApplication app(argc,argv);
    QDirModel* model = new QDirModel();
    QTreeView* view = new QTreeView();
    view->setModel(model);
    QComboBox* combo =  new QComboBox();
    combo->setView(view);
    combo->setModel(model);
    combo->show();
    app.exec();
}

int main(int argc, char **argv)
{
    QApplication app(argc,argv);
    QDirModel* model = new QDirModel();
    QTreeView* view = new QTreeView();
    view->setModel(model);
    QComboBox* combo =  new QComboBox();
    combo->setView(view);
    combo->setModel(model);
    combo->show();
    app.exec();
}

To copy to clipboard, switch view to plain text mode 

If so - what do I make wrong?
(The view isn't rendered correctly - only 10px height, selecting a file doesn't work)

thanks,
niko