c++ - Bring parent widget on top of widget that has Qt::Toolip Flag -

i have widget must cover whole screen, including taskbar , don't want widget appear on taskbar, that's why have set attribute flag qt::tooltip , works fine.

now problem have have widget, functions parent widget (much smaller child) below child widget. have tried bring parent show(), activatewindow(), rise() , setting qt::windowstaysontophint attribute on parent, doesn't help.

is there way bring or impossible wit qt::tooltip? have tried other options qt::tool or qt::dialog similar behavior.

without setting qt::tooltip, qt::dialog or qt::tool parent comes top when call parent->activatewindow().