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|
-----------------------------------
-- Author: Uli Schlachter --
-- Copyright 2009 Uli Schlachter --
-----------------------------------
local widgets_by_type = {
graph = require 'obvious.lib.widget.graph',
progressbar = require 'obvious.lib.widget.progressbar',
textbox = require 'obvious.lib.widget.textbox',
}
local setmetatable = setmetatable
local getmetatable = getmetatable
local pairs = pairs
local type = type
local lib = {
hooks = require("obvious.lib.hooks")
}
local defaults = { }
-- The functions each object from from_data_source will get
local funcs = { }
funcs.set_type = function (obj, widget_type)
local widget_type = widgets_by_type[widget_type]
if not widget_type or not widget_type.create then
return
end
local meta = getmetatable(obj)
local widget = widget_type.create(meta.data)
obj[1] = widget
obj.update()
return obj
end
local function from_data_source(data)
local ret = { }
for k, v in pairs(funcs) do
ret[k] = v
end
-- We default to graph since progressbars can't handle sources without an
-- upper bound on their value
ret[1] = widgets_by_type.graph.create(data)
ret.update = function()
-- because this uses ret, if ret[1] is changed this automatically
-- picks up the new widget
ret[1]:update()
end
-- Fire up the timer which keeps this widget up-to-date
lib.hooks.timer.register(10, 60, ret.update)
lib.hooks.timer.start(ret.update)
ret.update()
local meta = { }
meta.data = data
-- This is called when an unexesting key is accessed
meta.__index = function (obj, key)
local ret = obj[1][key]
if key ~= "layout" and type(ret) == "function" then
-- Ugly hack: this function wants to be called on the right object
return function(_, ...)
-- Ugly hack: this function wants to be called on the right object
return ret(obj[1], ...)
end
end
return ret
end
setmetatable(ret, meta)
return ret
end
return {
from_data_source = from_data_source,
}
-- vim:ft=lua:ts=2:sw=2:sts=2:tw=80:et
|
