@Dariusz Hi im not sure that is possible as the ScrollArea widget is the one affected by layout options and not the actual ScollArea. Maybe you get lucky and someone else knows a trick to this. I have seen QLabels with images scale the dialog they are in but not sure it also works from within a scrollarea since its size will never be affected by the layouts.

@SGaist I ended up hocking up to resize event of parent widget to find out when size changed & resize my other widget acordingly. I ended up using "invisible" QLabel that retains size as my "spacer". I had to change its spacing role on the go depending of one or more widget are visible or not as I needed to retain correct order. So far works great. TIA

It's probably because of the alignment you set to Qt::AlignLeft. This alignment is for cases when you don't want an item to fill grid's cell or it has a maximum size smaller than the cell. It then says which border do you want your item to stick to. If you want it to fill the cell leave it at default i.e. remove alignment="Qt::AlignLeft" from item definition.

@6thC cool story, thanks for the detailed reply! I've realized that QLegend isn't the best solution for me, so I ended up doing something similar to what you did. I'm using labels with a monospaced font and splitting the whole and fractional parts, so it's a lot nicer now

@Chris-Kawa Oh, you are really guru of Qt. Thank for all.