lain/widget/watch.lua

44 lines
1.2 KiB
Lua

--[[
Licensed under GNU General Public License v2
* (c) 2014, Luke Bonham
--]]
local helpers = require("lain.helpers")
local textbox = require("wibox.widget.textbox")
local setmetatable = setmetatable
-- Template for asynchronous watcher widgets
-- lain.widget.watch
local function worker(args)
local watch = {}
local args = args or {}
local timeout = args.timeout or 5
local nostart = args.nostart or false
local stoppable = args.stoppable or false
local cmd = args.cmd
local settings = args.settings or function() widget:set_text(output) end
watch.widget = args.widget or textbox()
function watch.update()
helpers.async(cmd, function(f)
output = f
if output ~= watch.prev then
widget = watch.widget
settings()
watch.prev = output
end
end)
end
watch.timer = helpers.newtimer(cmd, timeout, watch.update, nostart, stoppable)
return watch
end
return setmetatable({}, { __call = function(_, ...) return worker(...) end })