QDockWidget -- keep widgets as close as possible when resizing window

Question

I have a QDockWidget containing several QGroupBoxes. (The content of the QGroupBoxes is shown/hidden upon mousePressEvent.) I'm looking for a way to keep the QGroupBoxes positioned as tightly together as possible, preferably at the top of the DockWidget. It should look something like this:

However, when increasing the size of the DockWidget, the GroupBoxes drift apart:

...which is very convenient in most cases, I know. But is there a way to override this behavior and get a nice, expandable, list-like grouping of Widgets?

The DockWidget contains a QGroupBox; the QGroupBoxes 'Foo', 'Bar' and 'Baz' are added to that box's QVBoxLayout.

Answer 1

Try adding an expanding spacer to the end of the vbox:

vbox.addStretch()