Show() and hide() widget

q&a
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Hi,

From: Creating searchable widget dashboards
Q: Is below statement entirely correct?

Each Qt widget has a .setVisible method which can be used to toggle that widget’s visibility. >>However, compound or nested widgets can only become invisible when all their child widgets are >>also invisible.

This is from QT website.
https://doc.qt.io/qt-5/qwidget.html#visible-prop
It seems like when I hide parent (OnOffWidget) then all child widgets also got hidden.

If an ancestor is not visible, the widget won’t become visible until all its ancestors are shown.