How to display all results of a search in vim

Question

When searching string with notepad++, new window opens and shows find results. I want to use this feature in vim. After googling I found out some suggestions:

Answer 1

The requirement is actually easy. but to get user inputted pattern, you need a function.

function! FindAll()
    call inputsave()
    let p = input('Enter pattern:')
    call inputrestore()
    execute 'vimgrep "'.p.'" % |copen'
endfunction

if you want to have a mapping, add this line:

nnoremap  :call FindAll()

but as I commented under your question. % may not work for unamed buffer.