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[etc/awesome.git] / widgets / abase.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2014, Luke Bonham                     
6                                                   
7 --]]
8
9 local newtimer     = require("lain.helpers").newtimer
10 local async        = require("lain.asyncshell")
11 local wibox        = require("wibox")
12
13 local setmetatable = setmetatable
14
15 -- Basic template for custom widgets (asynchronous version)
16 -- lain.widgets.abase
17
18 local function worker(args)
19     local abase    = {}
20     local args     = args or {}
21     local timeout  = args.timeout or 5
22     local cmd      = args.cmd or ""
23     local settings = args.settings or function() end
24
25     abase.widget = wibox.widget.textbox('')
26
27     function abase.update()
28         async.request(cmd, function(f)
29             output = f
30             if output ~= abase.prev then
31                 widget = abase.widget
32                 settings()
33                 abase.prev = output
34             end
35         end)
36     end
37
38     newtimer(cmd, timeout, abase.update)
39
40     return setmetatable(abase, { __index = abase.widget })
41 end
42
43 return setmetatable({}, { __call = function(_, ...) return worker(...) end })