prideful

1. Arrogant; disdainful.
2. Highly pleased; elated.

adjective

1. Overly convinced of one's own superiority and importance: arrogant, haughty, high-and-mighty, insolent, lofty, lordly, overbearing, overweening, proud, supercilious, superior. Idioms: on one's high horse. See attitude/good attitude/bad attitude/neutral attitude.
2. Properly valuing oneself, one's honor, or one's dignity: proud, self-respecting. See respect/contempt/standing.

The adjective has 2 meanings:

Meaning #1: having or showing arrogant superiority to and disdain of those one views as unworthy
  Synonyms: disdainful, haughty, lordly, sniffy, supercilious, swaggering

Meaning #2: joyful and proud especially because of triumph or success
  Synonyms: exultant, exulting, jubilant, rejoicing, triumphal, triumphant