https://forum.qt.io/topic/145378/the-tootip-of-qtoolbutton-does-not-appear-when-hover-into-the-button-by-winapi-instead-of-physical-mouse
The tootip of QToolButton does not appear when hover into the button by WinAPI instead of Physical...
https://www.nps.gov/state/tootip-test.htm
tootip test (U.S. National Park Service)
u snational parktestservice