赞同陈老师的句子成分分析。我和陈老师的理解不同之处：

happy 后接不定式或ing形式，二者差别很小：

1. happy + 不定式，表示通常普遍的情况。

2. happy + 现在分词，强调进行意义。也就是说talking进行中。

依据：《朗文英语语法》16.47的解释：

There is not much difference in meaning between -ing and the to infinitive: -ing may refer to an action in progress, whereas the to-infinitive may imply 'in general':

翻译：使用ing形式和不定式在意思上没多大差别。ing可能指动作进行中，而不定式指一般情形。

该书例句和解释：Sylvia is frantic getting everything ready for the wedding

(= Sylvia is frantic. She is getting everything ready...）