Tasklist_buttons = Gears.table.join(
  Awful.button({}, 1, function(c)
    if c == client.focus then
      c.minimized = true
    else
      c:emit_signal('request::activate', 'tasklist', { raise = true })
    end
  end),

  Awful.button({}, 3, function()
    Awful.menu.client_list { theme = { width = 250 } }
  end),
  Awful.button({}, 4, function()
    Awful.client.focus.byidx(1)
  end),
  Awful.button({}, 5, function()
    Awful.client.focus.byidx(-1)
  end)
)