refactor brightnessarc widget

brightnessarc-widget/brightnessarc.lua

@@ -2,16 +2,15 @@
 -- Brightness Widget for Awesome Window Manager
 -- Shows the brightness level of the laptop display
 -- More details could be found here:
--- https://github.com/streetturtle/awesome-wm-widgets/tree/master/brightness-widget
+-- https://github.com/streetturtle/awesome-wm-widgets/tree/master/brightnessarc-widget
 
 -- @author Pavel Makhov
--- @copyright 2017 Pavel Makhov
+-- @copyright 2019 Pavel Makhov
 -------------------------------------------------
 
 local wibox = require("wibox")
 local watch = require("awful.widget.watch")
 local spawn = require("awful.spawn")
-local naughty = require("naughty")
 
 local PATH_TO_ICON = "/usr/share/icons/Arc/status/symbolic/display-brightness-symbolic.svg"
 local GET_BRIGHTNESS_CMD = "light -G" -- "xbacklight -get"
@@ -37,9 +36,7 @@ local brightnessarc = wibox.widget {
     widget = wibox.container.arcchart
 }
 
-local brightnessarc_widget = wibox.container.mirror(brightnessarc, { horizontal = true })
-
-local update_widget = function(widget, stdout, stderr, exitreason, exitcode)
+local update_widget = function(widget, stdout)
     local brightness_level = string.match(stdout, "(%d?%d?)")
     brightness_level = tonumber(string.format("% 3d", brightness_level))
 
@@ -54,4 +51,4 @@ end)
 
 watch(GET_BRIGHTNESS_CMD, 1, update_widget, brightnessarc)
 
-return brightnessarc_widget
+return brightnessarc