If an activity is all over bar the shouting, the result of it is known, but it has not been officially finished or announced, so people can still say that a different result is possible.

With practically all the results declared, the Nationalist Party has 68 percent of the vote, so it's all over bar the shouting. 几乎所有的结果已宣布，国民党赢得了68%的选票，看来选举结果已成定局。