I have posted on a similar topic and not had any useful response. I have a sample project to demonstrate:
Main form + TPageControl with tabsheets. A TFrame as a container for a number of objects that sit on the tabsheet. Compiles and runs okay with GTK - screenshot (deliberately set the frame colour red).
Compile with QT and not okay - screenshot. It appears as if the TFrame is not rendered on the tabsheet. FButton is a button on the tabsheet - to confirm that QT
will display objects on a tabsheet. With GTK FButton is hidden behind the TFrame.
I had previously tried this with a TPanel and got the same behaviour, switched from a TPanel as a container to a TFrame - no change.
I've attached the sample project.
I'm running Linux Mint 20.3 with Lazarus 2.0.10 and have installed libqt5pas version 2.9 (
https://github.com/davidbannon/libqt5pas/releases/tag/v1.2.9).
Is it me or a bug?