Doodad extensibility

gistfile1.coffee

# Extend the Components as a way to provide defaults or add extra capability.
class TitleField extends StringField
    placeholder : 'Title'
    label       : 'Title'
    char_limit  : 70
    getValue: ->
        value = super()
        # do something with the value
        return value

# Extend Container components for a more declarative way of assembling the interface.
# Imperitive method still available when more logic is necessary.
class CustomForm extends Form

    layout: """
        title,subtitle  cover:200
        description     save_button
    """

    # Called when initializing the form. Provides the form instance for use
    # by the components.
    fields: (form) ->
        title       : new TitleField()
        subtitle    : new StringField
            char_limit: 100

        description : new StringField
            type: 'multiline'
            char_limit: '~300'

        cover       : new ImageField()

        save_button: new Button
            on: click: ->
                form.save()

new CustomForm
    model: issue_model