/**
 * Mixin for widgets used as items in widgets that inherit OO.ui.GroupWidget.
 *
 * Item widgets have a reference to a OO.ui.GroupWidget while they are attached to the group. This
 * allows bidirectional communication.
 *
 * Use together with OO.ui.GroupWidget to make disabled state inheritable.
 *
 * @private
 * @abstract
 * @class
 *
 * @constructor
 */
OO.ui.ItemWidget = function OoUiItemWidget() {
	//
};

/* Methods */

/**
 * Check if widget is disabled.
 *
 * Checks parent if present, making disabled state inheritable.
 *
 * @return {boolean} Widget is disabled
 */
OO.ui.ItemWidget.prototype.isDisabled = function () {
	return this.disabled ||
		( this.elementGroup instanceof OO.ui.Widget && this.elementGroup.isDisabled() );
};

/**
 * Set group element is in.
 *
 * @param {OO.ui.GroupElement|null} group Group element, null if none
 * @chainable
 */
OO.ui.ItemWidget.prototype.setElementGroup = function ( group ) {
	// Parent method
	// Note: Calling #setElementGroup this way assumes this is mixed into an OO.ui.Element
	OO.ui.Element.prototype.setElementGroup.call( this, group );

	// Initialize item disabled states
	this.updateDisabled();

	return this;
};