Added the function docstrings.

While at it i realized there is a problem where maximized state isn't detected when restoring a state.
Will try to add it quickly.

Also there is no way currently to disable maximizing. I think a global setting for this might make sense .?

I do not see a reason to disable maximizing - so I do not think a configuration flag is required

I could see a point in not allowing resizing at all, but will ignore this for now.

I stumbled upon another (but related) problem though. The current maximizing code ignores taskbar and co since Screen->availableGeometry() does only work under specific circumstances.

Note, on X11 this will return the true available geometry only on systems with one monitor and if window manager has set _NET_WORKAREA atom. In all other cases this is equal to geometry(). This is a limitation in X11 window manager specification.

At least on my system some offset for a top panel on my desktop seem to be enforced BUT the size isn't affected. This leads to the height being off by about 60 px on my system.

Thats the reason it is not implemented yet - it looks so easy but it isn't 😜 Just tell me if you fixed all issues and your pull request is ready.

Yeah i was not aware how limited X11 is in this regard.
showMaximize is also not guaranteed to work on X11 (it kinda does on mine tho until i move the window ...).

If you are talking about your 2 requested changes: These are in the last commit.

Personally i don't think this should be merged yet because it simply might "cut" content due to the described bug.
Additionally the first mentioned bug isn't that critical, but hard to fix.

I will definitely keep working on this, but can do so in another PR if you feel that's the better approach.

Ok, then create a new pull request if you feel that it is ready