Merge pull request #16 from yawnt/brightness

contrib-widget: brightness

widgets/contrib/brightness.lua

@@ -0,0 +1,43 @@
+
+--[[
+
+     Licensed under GNU General Public License v2
+      * (c) 2013, yawnt <yawn.localhost@gmail.com>
+
+--]]
+
+local newtimer        = require("lain.helpers").newtimer
+
+local wibox           = require("wibox")
+local io              = { popen  = io.popen }
+local string          = { match  = string.match }
+
+local setmetatable    = setmetatable
+
+-- Brightness
+-- lain.widgets.contrib.brightness
+local brightness = {}
+
+local function worker(args)
+    local args      = args or {}
+    local backlight = args.backlight or "acpi_video0"
+    local timeout   = args.timeout or 5
+    local settings  = args.settings or function() end
+
+    brightness.widget = wibox.widget.textbox('')
+
+    function brightness.update()
+        local f = assert(io.popen('cat /sys/class/backlight/' .. backlight .. "/brightness"))
+        brightness_now = f:read("*a")
+        f:close()
+
+        widget = brightness.widget
+        settings()
+    end
+
+    newtimer("brightness", timeout, brightness.update)
+
+    return setmetatable(brightness, { __index = brightness.widget })
+end
+
+return setmetatable(brightness, { __call = function(_, ...) return worker(...) end })