let QWidget send simultaneous resizeevent when resize happens

[wysota]

Hello. We are not creating a new project while porting it to Qt.
because of historical reason the old layout we cannot remove in the near future.

I have no idea what you mean by that.

may i know whether it is not recommanded to trigger a resizeevent before the widget visible?

All widgets gain their physical attributes (like font size, size, etc.) when they are shown for the first time.