what is a wrap panel in windows 8 metro app context

Question

I just wrote an "hello world" in windows 8 app and today I read some thing about wrap panel in a blog.

What is a wrap panel? When should it be used?

Answer 1

Wrappanels are used if your program is resizable to order the controls inside this panel. I think that each item gets sizes based on the dimensions of the first item. I guess it is very useful if your app should support snap view