# Item.Alignment

    'use strict'

    assert = require 'src/assert'
    utils = require 'src/utils'

# **Class** Alignment

    module.exports = (Renderer, Impl, itemUtils) -> (ctor) -> class Alignment extends itemUtils.DeepObject
        @__name__ = 'Alignment'

        itemUtils.defineProperty
            constructor: ctor
            name: 'alignment'
            defaultValue: null
            valueConstructor: Alignment
            setter: (_super) -> (val) ->
                {alignment} = @
                if utils.isObject val
                    alignment.horizontal = val.horizontal if val.horizontal?
                    alignment.vertical = val.vertical if val.vertical?
                else
                    alignment.horizontal = alignment.vertical = val

                _super.call @, val
                return

        constructor: (ref) ->
            super ref
            @_horizontal = 'left'
            @_vertical = 'top'

            Object.preventExtensions @

## *String* Alignment::horizontal = 'left'

## *Signal* Alignment::onHorizontalChange(*String* oldValue)

        itemUtils.defineProperty
            constructor: @
            name: 'horizontal'
            defaultValue: 'left'
            namespace: 'alignment'
            parentConstructor: ctor
            implementation: Impl["set#{ctor.__name__}AlignmentHorizontal"]
            developmentSetter: (val) ->
                assert.isString val
            setter: (_super) -> (val='left') ->
                _super.call @, val

## *String* Alignment::vertical = 'top'

## *Signal* Alignment::onVerticalChange(*String* oldValue)

        itemUtils.defineProperty
            constructor: @
            name: 'vertical'
            defaultValue: 'top'
            namespace: 'alignment'
            parentConstructor: ctor
            implementation: Impl["set#{ctor.__name__}AlignmentVertical"]
            developmentSetter: (val) ->
                assert.isString val
            setter: (_super) -> (val='top') ->
                _super.call @, val

        toJSON: ->
            horizontal: @horizontal
            vertical: @vertical

# Glossary

- [Item.Alignment](#class-alignment)