Add signal handling in declaration

init.lua

@@ -62,7 +62,7 @@ local widget = { -- for the widget that awesome draws
  -- for declaring subwidget properties
  SUBW_DECL = Set({ "conkybox", "iconbox", "labelbox", "background" }),
  -- for declaring a conky widget
- CONKY_DECL = Set({ "conky", "icon", "label", "updater", "buttons" }),
+ CONKY_DECL = Set({ "conky", "icon", "label", "updater", "buttons", "signals" }),
 }
 local updater = {} -- for updating the widget
 local window = {} -- for conky's own window
@@ -201,6 +201,12 @@ function widget.make(raw) -- {{{2
  root:buttons(buttons)
  end
 
+ if raw.signals then
+ for signal, func in pairs(raw.signals) do
+ root:connect_signal(signal, func)
+ end
+ end
+
  return root
 end
 
@@ -372,7 +378,7 @@ function updater.add(conkybox, iconbox, labelbox, background, func) -- {{{2
  local labelbox = labelbox
  local background = background
  local func = func or function(result, conky, icon, label, background)
- conky:set_text(result)
+ conky:set_text(result or "")
  end
  local last_update = nil