Question

When expanding an item at the bottom of a QTreeView, the view does not automatically scroll to show the newly-expanded items. I can fix this by detecting expansion and performing the scroll myself when appropriate.

However, I would instead like to allow the user to scroll the view farther than is currently allowed. Currently, if the tree is too tall to fit in the visible area, the view can be scrolled only until the bottom-most row comes into view.

I believe this should be doable by tricking the QTreeView’s size calculation, but even after source diving I don’t understand the interaction between QTreeView and its base QAbstractScrollArea well enough to know what to poke, or where to start poking.

If all else fails I may just add some dummy, non-editable rows to my data model.

Answer 1

you can add extra white space to the treeview by increasing its vertical scrollbar maximum value. Smth like this:

max = self.treeview.verticalScrollBar().maximum()
self.treeview.verticalScrollBar().setMaximum(max*2)

hope this helps, regards