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contrib-widget: brightness
[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 local string          = { match  = string.match }
14
15 local setmetatable    = setmetatable
16
17 -- Brightness 
18 -- lain.widgets.contrib.brightness
19 local brightness = {}
20
21 local function worker(args)
22     local args      = args or {}
23     local backlight = args.backlight or "acpi_video0"
24     local timeout   = args.timeout or 5
25     local settings  = args.settings or function() end
26
27     brightness.widget = wibox.widget.textbox('')
28
29     function brightness.update()
30         local f = assert(io.popen('cat /sys/class/backlight/' .. backlight .. "/brightness"))
31
32         brightness_now = {
33           level = f:read("*a")
34         }
35         f:close()
36         
37         widget = brightness.widget
38         settings()
39     end
40
41     newtimer("brightness", timeout, brightness.update)
42
43     return setmetatable(brightness, { __index = brightness.widget })
44 end
45
46 return setmetatable(brightness, { __call = function(_, ...) return worker(...) end })