Use of "de"
I'm trying to learn the different uses of "de"; right now I'm working on "adjective+de+verb". My understanding is the verb explains the adjective so could I say "Estoy feliz de cocinar" to say "Cooking makes me happy"? If not, how would that translate into English?
...What about a more permanent, less subjective adjective like "The wall is blue becasue we painted it"...could that be understood as "Las pared azul de pintar"? Any better examples are also welcome 
2 Answers
It would be immensely helpful if you would tell us in your profile a bit about your Spanish and English proficiency.
I would probably translate Estoy feliz de cocinar as I'm happy to cook, although your translation might be appropriate in some contexts.
To me, Las pared azul de pintar doesn't make sense. I would give, as the translation of The wall is blue because we painted it, La pared es azul porque la pintamos.
I wonder whether you are trying too hard to use "adjective+de+verb" in places where it doesn't really work.
Perhaps this previous discussion would interest you.
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