Where can I find technical info on making custom window decorations, plasma decorations, icon packs, window widgets, etc.?

Title. Want to make one but can’t find technical info.

And more specific links? What I want to make are those:

Click “Documentation”, then scroll down and click “Plasma Themes and Plugins”, then choose what you want to work on and read the specific part.

I’m not 100% sure what you are looking at - because none of it is in English - but it looks like the “window decorations” section, so you probably want to read about Window Decorations.

If you want to develop a very custom window decoration that uses custom code, read about the KDecoration API, and probably look at the Breeze source code as an example. If you want to just draw new graphics, read the tutorial for the Aurorae engine. There are also YouTube tutorials for Aurorae that you can find if you search.

Oh, thanks, got it. Have a nice day/evening/morning/night.