refactor brightnessarc widget

brightnessarc-widget/brightnessarc.lua

@@ -2,19 +2,18 @@
 -- 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"
+local GET_BRIGHTNESS_CMD = "light -G" -- "xbacklight -get"
 local INC_BRIGHTNESS_CMD = "light -A 5" -- "xbacklight -inc 5"
 local DEC_BRIGHTNESS_CMD = "light -U 5" -- "xbacklight -dec 5"
 
@@ -37,21 +36,19 @@ 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))
 
     widget.value = brightness_level / 100;
 end,
 
-brightnessarc:connect_signal("button::press", function(_,_,_,button)
-    if (button == 4)     then spawn(INC_BRIGHTNESS_CMD, false)
+brightnessarc:connect_signal("button::press", function(_, _, _, button)
+    if (button == 4) then spawn(INC_BRIGHTNESS_CMD, false)
     elseif (button == 5) then spawn(DEC_BRIGHTNESS_CMD, false)
     end
 end)
 
 watch(GET_BRIGHTNESS_CMD, 1, update_widget, brightnessarc)
 
-return brightnessarc_widget
+return brightnessarc