[solved] programatically expand a particular path in QTreeView

[ondrejandrej]

I have a QTreeView in combination with QFileSystemModel, showing the entire content of my computer (all drives on Windows).
@m_model = new QFileSystemModel(this);
m_treeView = new QTreeView(this);
m_treeView->setModel(m_model);
m_model->setRootPath(initialPath);@

I need to show the tree view expanded to initialPath from the beginning. I tried this:
@m_treeView->expand(m_model->index(initialPath));@

But it works only when initialPath is one of the drives (like C:). In that case the drive is shown expanded.
I also tried this, which doesn't seem to work.
@auto rootIdx = m_model->setRootPath(initialPath);
m_treeView->selectionModel()->select(rootIdx, QItemSelectionModel::Select);@

Any idea?

[SGaist]

Hi,

Since the QFileSystemModel loading is threaded, I would rather call expand in a slot connected to "directoryLoaded":http://doc.qt.io/qt-5/qfilesystemmodel.html#directoryLoaded

Hope it helps

[raven-worx]

@QTreeView::scrollTo()@
it also ensures that all parent nodes are expanded

[ondrejandrej]

QTreeView::scrollTo() does the trick!
directoryLoaded() wasn't helpful.