VO Dropdown List w/ Editbox

local function list2(params)
    -- this function expects a table
    params.expand = params.expand or 'NO'
    params.list = params.list or {}
    params.size = params.size or 50
    params.value = params.value or ''
    params.active = params.active or 'YES'
    local textbox = iup.text{size = params.size, expand = params.expand, value = params.value, active = params.active}
    local dropdown = iup.list{dropdown = 'YES', size = params.size + 20, expand = params.expand, active = params.active, fgcolor = '0 0 0 0', action = function(self, t, i, v)
        textbox.value = t
        iup.SetFocus(textbox)
    end}
    for i, v in ipairs(params.list) do
        dropdown[i] = v
        if (v == params.value) then dropdown.value = i end
    end
    local zbox = iup.zbox{
        --dropdown must be before textbox within the zbox to create the proper z-order
        iup.hbox{dropdown,},
        iup.hbox{textbox, iup.fill{size = 20}},
        all = 'YES',
        alignment = 'NW',
    }
    return zbox, textbox, dropdown
end