/**
 * @description Interface describing some point in space with 'x' and 'y' properties.
 * @interface jibo.face.views.ElementGroup~PointData
 * @property {Number|String} [x] X value for the point
 * @property {Number|String} [y] Y value for the point
 */

/**
 * @description Interface - Configuration values for creating an ElementGroup.
 * @interface jibo.face.views.ElementGroup~ElementOptions
 * @extends jibo.face.views.Component~ComponentOptions
 * @prop {Boolean} [interactable] - Flag that indicates if user can interact with the element.
 */

/**
 * Base class for element groups that extend component
 * groups. Has base methods that deal with display
 * and positioning.
 *
 * @class ElementGroup
 * @extends jibo.face.views.ComponentGroup
 * @implements jibo.face.views.IElement
 * @memberof jibo.face.views
 */

    /**
     * The default class identifier.
     * Generally used to register the class.
     * @name jibo.face.views.ElementGroup.DEFAULT_TYPE
     * @type {String}
     * @readOnly
     */

    /**
     * Flag determines if ElementGroup can be interactive.
     * If `false` prevents locking and unlocking input from effecting the display's interactivity.
     * @name jibo.face.views.ElementGroup#interactable
     * @default false
     * @type {boolean}
     */

    /**
     * Display container for the ElementGroup.
     * @name jibo.face.views.ElementGroup#display
     * @type {PIXI.Container}
     */

    /**
     * The target position.
     * Can be specified prior to the creation of the display, when the display is created this position is applied.
     * @name jibo.face.views.ElementGroup#targetPosition
     * @type {PIXI.Point}
     */

    /**
     * Create ElementGroup from configuration.
     * @method jibo.face.views.ElementGroup#createFromConfig
     * @param {Object} configData Configuration to create list from.
     * @returns {jibo.face.views.ElementGroup}
     */

    /**
     * FOR OVERRIDE ONLY. DO NOT CALL.
     *
     * Assign data passed via Object to class.
     * Method can be overridden to allow for manual definition of values, assets, etc.
     * @method jibo.face.views.ElementGroup#assignConfig
     * @param {any} configData - Object derived from JSON containing values specific to ElementGroup.
     */

    /**
     * FOR OVERRIDE ONLY. DO NOT CALL.
     *
     * Create ElementGroup's display and add to container.
     * @method jibo.face.views.ElementGroup#createDisplay
     * @param {PIXI.Container} container Parent Container which all DisplayObject
     *        created within this ElementGroup should be added to.
     * @param {Object} assets Object passed back from loader namespace load method,
     *        refer to {@link jibo.loader} for detail
     */

    /**
     * Set up the display.
     * Assign assets, set timelines, etc.
     * @method jibo.face.views.ElementGroup#setupDisplay
     * @param {Object} [assets] Object passed back from loader namespace load method,
     *        refer to {@link jibo.loader} for detail
     */

    /**
     * Destroy display's children
     * Clean up all processes using display's children
     * (i.e. tweens).
     * @method jibo.face.views.ElementGroup#emptyDisplay
     */

    /**
     * Stop all tweens whose targets are children of ElementGroup's display.
     * Option to stop tweens on ElementGroup's display as well.
     * @param {boolean} [includeDisplay = false] If `true` will stop tween on display.
     * @method jibo.face.views.ElementGroup#stopChildTweens
     */

    /**
     * Used to define the position for the display before it is created.
     * @method jibo.face.views.ElementGroup#setTargetPosition
     * @param {Number} [x = 0] The x position target.
     * @param {Number} [y = 0] The y position target.
     * @param {Boolean} [applyNow = false] Flag determining if given target position should be applied to display within this method.
     *          (Display must be defined for this to take effect.)
     */

    /**
     * Apply position that was defined in config to display's actual position.
     * @method jibo.face.views.ElementGroup#applyPosition
     * @public
     */

    /**
     * FOR OVERRIDE ONLY. DO NOT CALL.
     *
     * Open transition, defaults to vertical tween upward from below viewport.
     * @method jibo.face.views.ElementGroup#open
     * @param {Function} callback Function to be called once open is complete.
     * @param {String} transitionType String used to determine ElementGroup's open transition,
     *        refer to ViewManager for constants used
     * @param {number} [duration = ViewManager.TRANS_TIME] Duration in milliseconds of the transition.
     * @param {String} [tweenType = 'backOut'] Type of tween used.
     */

    /**
     * FOR OVERRIDE ONLY. DO NOT CALL.
     *
     * Close transition, defaults to vertical tween upward out of viewport.
     * @method jibo.face.views.ElementGroup#close
     * @param {Function} callback Function to be called once open is complete.
     * @param {String} [transitionType] String used to determine way ElementGroup's close transition,
     *        refer to ViewManager for constants used.
     * @param {number} [duration = ViewManager.TRANS_TIME] Duration in milliseconds of the transition.
     * @param {String} [tweenType = 'backIn'] Type of tween used.
     */

    /**
     * FOR OVERRIDE ONLY. DO NOT CALL.
     *
     * Destroy, stops any tweens that may be active on the ElementGroup's display.
     * @method jibo.face.views.ElementGroup#destroy
     */

    /**
     * Lock or unlock input.
     * If display is defined and interactable is `true` sets display's interactivity.
     * @method jibo.face.views.ElementGroup#lockInput
     * @param {Boolean} flag Determines if input is locked.
     */