Simply Joy

How can you be joyous in a difficult situation? Say my husband has a bad day, his mood is not pleasant. I can feel bad because he is too much in his feeling to pay me attention. I can also feel joy, that he is here with me. This really works. Just like I felt when we were in love, that same feeling actually helps in a bad mood day.
What would happen if I focus on giving joy?
I want to learn more about joy without artifacts. I guess it is about wanting what you already have, rather than expecting a fix through an artefact. I want to read more about it this year.