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wiki updated; closes #261
[etc/awesome.git] / widgets / base.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 read_pipe    = require("lain.helpers").read_pipe
11 local wibox        = require("wibox")
12
13 local setmetatable = setmetatable
14
15 -- Basic template for custom widgets
16 -- lain.widgets.base
17
18 local function worker(args)
19     local base     = {}
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     base.widget = wibox.widget.textbox('')
26
27     function base.update()
28         output = read_pipe(cmd)
29         if output ~= base.prev then
30             widget = base.widget
31             settings()
32             base.prev = output
33         end
34     end
35
36     newtimer(cmd, timeout, base.update)
37
38     return setmetatable(base, { __index = base.widget })
39 end
40
41 return setmetatable({}, { __call = function(_, ...) return worker(...) end })