Awesome WM Alt + Scroll

Question

How to make Alt + mouse Scroll to run awful.tag.viewnext and awful.tag.viewprev, having mouse position anywhere ? I tried:

 root.buttons(gears.table.join(
    awful.button({ }, 3, function () mymainmenu:toggle() end),
    awful.button({"Alt" }, 4, awful.tag.viewnext),
    awful.button({"Alt" }, 5, awful.tag.viewprev)
))

But it dosent works.

Answer 1

Still cant use Alt. But it works with modkey. Here how i made it:

root.buttons(gears.table.join(
    awful.button({ }, 3, function () mymainmenu:toggle() end),
    awful.button({ modkey }, 5, awful.tag.viewnext),
    awful.button({ modkey }, 4, awful.tag.viewprev)
))
...
clientbuttons = gears.table.join(
    awful.button({ modkey }, 5,   function(t) awful.tag.viewnext(1) end),
    awful.button({ modkey }, 4,   function(t) awful.tag.viewprev(1) end),
    ...