[PyQt] Question on QTreeView, interactive expanding/collapsing

[James Polk]

Greetings All,

In a typical QTreeView,...the default behaviour of clicking on a "plus box",
i.e. the branch boxes of the tree, yields a "single box open", or in the case
of collapsing, a "single box closed" event.

Is there any way to use a keyboard modifier, like SHIFT, CTRL, and/or ALT,
to expand or collapse the *whole* tree?

Many other similiar tree structures in other software have this feature.
For example, holding down CTRL and ALT and clicking on any box will
unfold/expand (or collapse) all nodes/branches from that node and all below.
Is there something I'm overlooking? Is this (re-)implementable ?

Many Thanks,
-Jim

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