Cleaner Code

expcore/gui/concepts/checkbox.lua

@@ -7,30 +7,43 @@ local Gui = require 'expcore.gui.core'
 
 --[[-- Clickable elements with a cross in the middle that can be turned off or on.
 @element checkbox
+
 @param on_state_changed fired when the state of the element is changed
+
 @tparam ?string|Concepts.LocalisedString caption the message that is shown next to the checkbox
 @tparam ?string|Concepts.LocalisedString tooltip the tooltip that shows when a player hovers over the checkbox
 @tparam ?boolean|function default the default state of this checkbox, or a function which returns the default state
 @tparam boolean use_radio setting to true will use radio buttons rather than checkboxs
+
 @usage-- Making a basic checkbox
 local basic_checkbox =
-Gui.clone_concept('checkbox','basic_checkbox')
+Gui.new_concept('checkbox')
 :set_caption('Basic Checkbox')
 :set_tooltip('Basic checkbox')
 :on_state_changed(function(event)
     event.player.print('Basic checkbox is now: '..tostring(event.element.state))
 end)
+
 ]]
-Gui.new_concept('checkbox')
+
+Gui.new_concept()
+:save_as('checkbox')
+
+-- Events
 :new_event('on_state_changed',defines.events.on_gui_checked_state_changed)
+
+-- Properties
 :new_property('tooltip')
 :new_property('caption')
-:new_property('default',false)
-:new_property('use_radio',false)
+:new_property('default',nil,false)
+:new_property('use_radio',nil,false)
+
+-- Draw
 :define_draw(function(properties,parent,element)
     local default = properties.default
     local state = type(default) == 'boolean' and default
 
+    -- Draw a checkbox
     element = parent.add{
         name = properties.name,
         type = properties.use_radio and 'radiobutton' or 'checkbox',
@@ -39,6 +52,7 @@ Gui.new_concept('checkbox')
         state = state
     }
 
+    -- Set the default state
     default = Gui.resolve_property(default,element)
     if default and default ~= state then
         element.state = default