Keep a application window always on current desktop on linux and mac

Question

I search a way to put a QWidget window of a Qt application always on the current desktop/workspace. When I change the virtual desktop, I need my window to be automatically visible on the new current virtual desktop.

I search a solution that works at minimum on gnome, kde on linux and mac os.

I think the first step is to detect when virtual desktop is change, I don't know if Qt have a API for that or if I need to implement it for each desktop solution.

Answer 1

Under X11, you are supposed to set the _NET_WM_DESKTOP window property to 0xFFFFFFFF. I suspect there's no Qt API for that, so you'll have to litter the code with #ifdefs checking for X11 and call an appropriate X's function (nope, I don't know which one it is).