== UI definitions ==

UI elements can be both loaded from Lua definitions or created on the fly.

== UI styles ==

Modeled after CSS but using pure lua.

Each UI element has:
* id value, might not be set
* type value, set by type database
* class value, might be set by user
* special modifier (selected, hover, etc)

{{{#!lua
-- some_name.style.lua
["default"] = {
  text_color         = { 0.3, 0.3, 0.3, 1.0 },
  background_color   = { 0.0, 0.0, 0.0, 1.0 },
  background_image   = "source:path/name/file.png",
  background_stretch = 
}

-- class definition
[".redclass"] = {
  text_color         = { 1.0, 0.3, 0.3, 1.0 },
}

-- type definition
["button"] = {
  border_color = SILVER, -- constant colors
}

-- modifier definition, with class
["button:hover"] = {
  border_color = RED, -- constant colors
}

-- id definition (no need for additional because unique!
["#mybutton"] = {
  border_width = 3,
}

}}}