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Updated alsa (markdown)
[etc/awesome.git] / widgets / contrib / brightness.lua
1
2 --[[
3                                                    
4      Licensed under GNU General Public License v2  
5       * (c) 2013, yawnt <yawn.localhost@gmail.com> 
6                                                    
7 --]]
8
9 local newtimer        = require("lain.helpers").newtimer
10
11 local wibox           = require("wibox")
12 local io              = { popen  = io.popen }
13
14 local setmetatable    = setmetatable
15
16 -- Brightness level
17 -- lain.widgets.contrib.brightness
18 local brightness = {}
19
20 local function worker(args)
21     local args      = args or {}
22     local backlight = args.backlight or "acpi_video0"
23     local timeout   = args.timeout or 5
24     local settings  = args.settings or function() end
25
26     brightness.widget = wibox.widget.textbox('')
27
28     function brightness.update()
29         local f = assert(io.popen('cat /sys/class/backlight/' .. backlight .. "/brightness"))
30         brightness_now = f:read("*a")
31         f:close()
32
33         widget = brightness.widget
34         settings()
35     end
36
37     newtimer("brightness", timeout, brightness.update)
38
39     return setmetatable(brightness, { __index = brightness.widget })
40 end
41
42 return setmetatable(brightness, { __call = function(_, ...) return worker(...) end })