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YUI 3.10.3 (build 2fb5187)
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Copyright 2013 Yahoo! Inc. All rights reserved.
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Licensed under the BSD License.
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http://yuilibrary.com/license/
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YUI.add('widget-base', function (Y, NAME) {
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* Provides the base Widget class, with HTML Parser support
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* Provides the base Widget class
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* @submodule widget-base
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ClassNameManager = Y.ClassNameManager,
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_getClassName = ClassNameManager.getClassName,
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_toInitialCap = Y.cached(function(str) {
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return str.substring(0, 1).toUpperCase() + str.substring(1);
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// K-Weight, IE GC optimizations
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DISABLED = "disabled",
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BOUNDING_BOX = "boundingBox",
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CONTENT_BOX = "contentBox",
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PARENT_NODE = "parentNode",
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OWNER_DOCUMENT = "ownerDocument",
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TAB_INDEX = "tabIndex",
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RENDERED = "rendered",
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DESTROYED = "destroyed",
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EMPTY_FN = function() {},
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UI_ATTRS = [VISIBLE, DISABLED, HEIGHT, WIDTH, FOCUSED, TAB_INDEX],
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// Widget nodeid-to-instance map.
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* A base class for widgets, providing:
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* <li>The render lifecycle method, in addition to the init and destroy
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* lifecycle methods provide by Base</li>
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* <li>Abstract methods to support consistent MVC structure across
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* widgets: renderer, renderUI, bindUI, syncUI</li>
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* <li>Support for common widget attributes, such as boundingBox, contentBox, visible,
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* disabled, focused, strings</li>
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* @param config {Object} Object literal specifying widget configuration properties.
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function Widget(config) {
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Y.log('constructor called', 'life', 'widget');
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constructor = widget.constructor;
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widget._cssPrefix = constructor.CSS_PREFIX || _getClassName(constructor.NAME.toLowerCase());
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// We need a config for HTML_PARSER to work.
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config = config || {};
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Widget.superclass.constructor.call(widget, config);
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render = widget.get(RENDER);
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// Render could be a node or boolean
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if (render !== TRUE) {
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widget.render(parentNode);
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* Static property provides a string to identify the class.
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* Currently used to apply class identifiers to the bounding box
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* and to classify events fired by the widget.
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Widget.NAME = "widget";
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* Constant used to identify state changes originating from
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* the DOM (as opposed to the JavaScript model).
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UI = Widget.UI_SRC = "ui";
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* Static property used to define the default attribute
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* configuration for the Widget.
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Widget.ATTRS = ATTRS;
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// Trying to optimize kweight by setting up attrs this way saves about 0.4K min'd
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* @default Generated using guid()
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* Flag indicating whether or not this Widget
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* has been through the render lifecycle phase.
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* @attribute rendered
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* @attribute boundingBox
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* @description The outermost DOM node for the Widget, used for sizing and positioning
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* of a Widget as well as a containing element for any decorator elements used
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* @type String | Node
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ATTRS[BOUNDING_BOX] = {
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* @attribute contentBox
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* @description A DOM node that is a direct descendant of a Widget's bounding box that
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* houses its content.
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* @type String | Node
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ATTRS[CONTENT_BOX] = {
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valueFn:"_defaultCB",
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* @attribute tabIndex
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* @description Number (between -32767 to 32767) indicating the widget's
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* position in the default tab flow. The value is used to set the
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* "tabIndex" attribute on the widget's bounding box. Negative values allow
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* the widget to receive DOM focus programmatically (by calling the focus
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* method), while being removed from the default tab flow. A value of
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* null removes the "tabIndex" attribute from the widget's bounding box.
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validator: "_validTabIndex"
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* @description Boolean indicating if the Widget, or one of its descendants,
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* @attribute disabled
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* @description Boolean indicating if the Widget should be disabled. The disabled implementation
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* is left to the specific classes extending widget.
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* @description Boolean indicating whether or not the Widget is visible.
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* @description String with units, or number, representing the height of the Widget. If a number is provided,
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* the default unit, defined by the Widgets DEF_UNIT, property is used.
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* @type {String | Number}
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* @description String with units, or number, representing the width of the Widget. If a number is provided,
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* the default unit, defined by the Widgets DEF_UNIT, property is used.
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* @type {String | Number}
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* @description Collection of strings used to label elements of the Widget's UI.
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setter: "_strSetter",
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* Whether or not to render the widget automatically after init, and optionally, to which parent node.
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* @type boolean | Node
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* The css prefix which the static Widget.getClassName method should use when constructing class names
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* @property CSS_PREFIX
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* @default Widget.NAME.toLowerCase()
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Widget.CSS_PREFIX = _getClassName(Widget.NAME.toLowerCase());
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* Generate a standard prefixed classname for the Widget, prefixed by the default prefix defined
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* by the <code>Y.config.classNamePrefix</code> attribute used by <code>ClassNameManager</code> and
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* <code>Widget.NAME.toLowerCase()</code> (e.g. "yui-widget-xxxxx-yyyyy", based on default values for
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* the prefix and widget class name).
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* The instance based version of this method can be used to generate standard prefixed classnames,
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* based on the instances NAME, as opposed to Widget.NAME. This method should be used when you
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* need to use a constant class name across different types instances.
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* @method getClassName
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* @param {String*} args* 0..n strings which should be concatenated, using the default separator defined by ClassNameManager, to create the class name
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Widget.getClassName = function() {
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// arguments needs to be array'fied to concat
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return _getClassName.apply(ClassNameManager, [Widget.CSS_PREFIX].concat(Y.Array(arguments), true));
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_getWidgetClassName = Widget.getClassName;
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* Returns the widget instance whose bounding box contains, or is, the given node.
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* In the case of nested widgets, the nearest bounding box ancestor is used to
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* return the widget instance.
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* @param node {Node | String} The node for which to return a Widget instance. If a selector
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* string is passed in, which selects more than one node, the first node found is used.
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* @return {Widget} Widget instance, or null if not found.
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Widget.getByNode = function(node) {
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widgetMarker = _getWidgetClassName();
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node = Node.one(node);
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node = node.ancestor("." + widgetMarker, true);
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widget = _instances[Y.stamp(node, true)];
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return widget || null;
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Y.extend(Widget, Y.Base, {
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* Returns a class name prefixed with the the value of the
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* <code>YUI.config.classNamePrefix</code> attribute + the instances <code>NAME</code> property.
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* Uses <code>YUI.config.classNameDelimiter</code> attribute to delimit the provided strings.
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* // returns "yui-slider-foo-bar", for a slider instance
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* var scn = slider.getClassName('foo','bar');
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* // returns "yui-overlay-foo-bar", for an overlay instance
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* var ocn = overlay.getClassName('foo','bar');
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* @method getClassName
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* @param {String}+ One or more classname bits to be joined and prefixed
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getClassName: function () {
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return _getClassName.apply(ClassNameManager, [this._cssPrefix].concat(Y.Array(arguments), true));
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* Initializer lifecycle implementation for the Widget class. Registers the
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* widget instance, and runs through the Widget's HTML_PARSER definition.
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* @method initializer
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* @param config {Object} Configuration object literal for the widget
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initializer: function(config) {
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Y.log('initializer called', 'life', 'widget');
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var bb = this.get(BOUNDING_BOX);
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if (bb instanceof Node) {
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this._mapInstance(Y.stamp(bb));
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* Notification event, which widget implementations can fire, when
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* they change the content of the widget. This event has no default
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* behavior and cannot be prevented, so the "on" or "after"
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* moments are effectively equivalent (with on listeners being invoked before
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* @event widget:contentUpdate
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* @param {EventFacade} e The Event Facade
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if (this._applyParser) {
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this._applyParser(config);
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* Utility method used to add an entry to the boundingBox id to instance map.
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* This method can be used to populate the instance with lazily created boundingBox Node references.
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* @method _mapInstance
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* @param {String} The boundingBox id
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_mapInstance : function(id) {
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_instances[id] = this;
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* Destructor lifecycle implementation for the Widget class. Purges events attached
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* to the bounding box and content box, removes them from the DOM and removes
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* the Widget from the list of registered widgets.
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destructor: function() {
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Y.log('destructor called', 'life', 'widget');
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var boundingBox = this.get(BOUNDING_BOX),
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if (boundingBox instanceof Node) {
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bbGuid = Y.stamp(boundingBox,true);
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if (bbGuid in _instances) {
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delete _instances[bbGuid];
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* Destroy lifecycle method. Fires the destroy
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* event, prior to invoking destructors for the
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* Overrides Base's implementation, to support arguments to destroy
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* Subscribers to the destroy
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* event can invoke preventDefault on the event object, to prevent destruction
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* @param destroyAllNodes {Boolean} If true, all nodes contained within the Widget are
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* removed and destroyed. Defaults to false due to potentially high run-time cost.
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* @return {Widget} A reference to this object
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destroy: function(destroyAllNodes) {
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this._destroyAllNodes = destroyAllNodes;
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return Widget.superclass.destroy.apply(this);
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* Removes and destroys the widgets rendered boundingBox, contentBox,
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* and detaches bound UI events.
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* @method _destroyBox
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_destroyBox : function() {
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var boundingBox = this.get(BOUNDING_BOX),
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contentBox = this.get(CONTENT_BOX),
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deep = this._destroyAllNodes,
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same = boundingBox && boundingBox.compareTo(contentBox);
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if (this.UI_EVENTS) {
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this._destroyUIEvents();
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this._unbindUI(boundingBox);
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contentBox.remove(TRUE);
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boundingBox.remove(TRUE);
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* Establishes the initial DOM for the widget. Invoking this
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* method will lead to the creating of all DOM elements for
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* the widget (or the manipulation of existing DOM elements
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* for the progressive enhancement use case).
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* This method should only be invoked once for an initialized
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* It delegates to the widget specific renderer method to do
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* @param parentNode {Object | String} Optional. The Node under which the
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* Widget is to be rendered. This can be a Node instance or a CSS selector string.
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* If the selector string returns more than one Node, the first node will be used
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* as the parentNode. NOTE: This argument is required if both the boundingBox and contentBox
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* are not currently in the document. If it's not provided, the Widget will be rendered
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* to the body of the current document in this case.
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render: function(parentNode) {
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if (this.get(DESTROYED)) { Y.log("Render failed; widget has been destroyed", "error", "widget"); }
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if (!this.get(DESTROYED) && !this.get(RENDERED)) {
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* Lifecycle event for the render phase, fired prior to rendering the UI
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* for the widget (prior to invoking the widget's renderer method).
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* Subscribers to the "on" moment of this event, will be notified
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* before the widget is rendered.
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* Subscribers to the "after" moment of this event, will be notified
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* after rendering is complete.
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* @preventable _defRenderFn
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* @param {EventFacade} e The Event Facade
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this.publish(RENDER, {
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defaultTargetOnly:TRUE,
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defaultFn: this._defRenderFn
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this.fire(RENDER, {parentNode: (parentNode) ? Node.one(parentNode) : null});
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* Default render handler
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* @method _defRenderFn
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* @param {EventFacade} e The Event object
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* @param {Node} parentNode The parent node to render to, if passed in to the <code>render</code> method
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_defRenderFn : function(e) {
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this._parentNode = e.parentNode;
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this._set(RENDERED, TRUE);
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this._removeLoadingClassNames();
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* Creates DOM (or manipulates DOM for progressive enhancement)
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* This method is invoked by render() and is not chained
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* automatically for the class hierarchy (unlike initializer, destructor)
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* so it should be chained manually for subclasses if required.
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renderer: function() {
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* Configures/Sets up listeners to bind Widget State to UI/DOM
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* This method is not called by framework and is not chained
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* automatically for the class hierarchy.
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* Adds nodes to the DOM
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* This method is not called by framework and is not chained
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* automatically for the class hierarchy.
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* Refreshes the rendered UI, based on Widget State
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* This method is not called by framework and is not chained
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* automatically for the class hierarchy.
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* @description Hides the Widget by setting the "visible" attribute to "false".
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return this.set(VISIBLE, FALSE);
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* @description Shows the Widget by setting the "visible" attribute to "true".
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return this.set(VISIBLE, TRUE);
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* @description Causes the Widget to receive the focus by setting the "focused"
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* attribute to "true".
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return this._set(FOCUSED, TRUE);
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* @description Causes the Widget to lose focus by setting the "focused" attribute
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return this._set(FOCUSED, FALSE);
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* @description Set the Widget's "disabled" attribute to "false".
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return this.set(DISABLED, FALSE);
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* @description Set the Widget's "disabled" attribute to "true".
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disable: function() {
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return this.set(DISABLED, TRUE);
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* @param {boolean} expand
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_uiSizeCB : function(expand) {
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this.get(CONTENT_BOX).toggleClass(_getWidgetClassName(CONTENT, "expanded"), expand);
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* Helper method to collect the boundingBox and contentBox and append to the provided parentNode, if not
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* already a child. The owner document of the boundingBox, or the owner document of the contentBox will be used
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* as the document into which the Widget is rendered if a parentNode is node is not provided. If both the boundingBox and
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* the contentBox are not currently in the document, and no parentNode is provided, the widget will be rendered
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* to the current document's body.
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* @param {Node} parentNode The parentNode to render the widget to. If not provided, and both the boundingBox and
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* the contentBox are not currently in the document, the widget will be rendered to the current document's body.
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_renderBox: function(parentNode) {
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// TODO: Performance Optimization [ More effective algo to reduce Node refs, compares, replaces? ]
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var widget = this, // kweight
736
contentBox = widget.get(CONTENT_BOX),
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boundingBox = widget.get(BOUNDING_BOX),
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srcNode = widget.get(SRC_NODE),
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defParentNode = widget.DEF_PARENT_NODE,
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doc = (srcNode && srcNode.get(OWNER_DOCUMENT)) || boundingBox.get(OWNER_DOCUMENT) || contentBox.get(OWNER_DOCUMENT);
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// If srcNode (assume it's always in doc), have contentBox take its place (widget render responsible for re-use of srcNode contents)
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if (srcNode && !srcNode.compareTo(contentBox) && !contentBox.inDoc(doc)) {
745
srcNode.replace(contentBox);
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if (!boundingBox.compareTo(contentBox.get(PARENT_NODE)) && !boundingBox.compareTo(contentBox)) {
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// If contentBox box is already in the document, have boundingBox box take it's place
750
if (contentBox.inDoc(doc)) {
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contentBox.replace(boundingBox);
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boundingBox.appendChild(contentBox);
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parentNode = parentNode || (defParentNode && Node.one(defParentNode));
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parentNode.appendChild(boundingBox);
760
} else if (!boundingBox.inDoc(doc)) {
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Node.one(BODY).insert(boundingBox, 0);
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* Setter for the boundingBox attribute
773
_setBB: function(node) {
774
return this._setBox(this.get(ID), node, this.BOUNDING_TEMPLATE, true);
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* Setter for the contentBox attribute
782
* @param {Node|String} node
785
_setCB: function(node) {
786
return (this.CONTENT_TEMPLATE === null) ? this.get(BOUNDING_BOX) : this._setBox(null, node, this.CONTENT_TEMPLATE, false);
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* Returns the default value for the contentBox attribute.
792
* For the Widget class, this will be the srcNode if provided, otherwise null (resulting in
793
* a new contentBox node instance being created)
798
_defaultCB : function(node) {
799
return this.get(SRC_NODE) || null;
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* Helper method to set the bounding/content box, or create it from
804
* the provided template if not found.
809
* @param {String} id The node's id attribute
810
* @param {Node|String} node The node reference
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* @param {String} template HTML string template for the node
812
* @param {boolean} true if this is the boundingBox, false if it's the contentBox
813
* @return {Node} The node
815
_setBox : function(id, node, template, isBounding) {
817
node = Node.one(node);
820
node = Node.create(template);
823
this._bbFromTemplate = true;
825
this._cbFromTemplate = true;
830
node.set(ID, id || Y.guid());
837
* Initializes the UI state for the Widget's bounding/content boxes.
842
_renderUI: function() {
843
this._renderBoxClassNames();
844
this._renderBox(this._parentNode);
848
* Applies standard class names to the boundingBox and contentBox
850
* @method _renderBoxClassNames
853
_renderBoxClassNames : function() {
854
var classes = this._getClasses(),
856
boundingBox = this.get(BOUNDING_BOX),
859
boundingBox.addClass(_getWidgetClassName());
861
// Start from Widget Sub Class
862
for (i = classes.length-3; i >= 0; i--) {
864
boundingBox.addClass(cl.CSS_PREFIX || _getClassName(cl.NAME.toLowerCase()));
867
// Use instance based name for content box
868
this.get(CONTENT_BOX).addClass(this.getClassName(CONTENT));
872
* Removes class names representative of the widget's loading state from
875
* @method _removeLoadingClassNames
878
_removeLoadingClassNames: function () {
880
var boundingBox = this.get(BOUNDING_BOX),
881
contentBox = this.get(CONTENT_BOX),
882
instClass = this.getClassName(LOADING),
883
widgetClass = _getWidgetClassName(LOADING);
885
boundingBox.removeClass(widgetClass)
886
.removeClass(instClass);
888
contentBox.removeClass(widgetClass)
889
.removeClass(instClass);
893
* Sets up DOM and CustomEvent listeners for the widget.
898
_bindUI: function() {
899
this._bindAttrUI(this._UI_ATTRS.BIND);
907
_unbindUI : function(boundingBox) {
908
this._unbindDOM(boundingBox);
912
* Sets up DOM listeners, on elements rendered by the widget.
917
_bindDOM : function() {
918
var oDocument = this.get(BOUNDING_BOX).get(OWNER_DOCUMENT),
919
focusHandle = Widget._hDocFocus;
921
// Shared listener across all Widgets.
923
focusHandle = Widget._hDocFocus = oDocument.on("focus", this._onDocFocus, this);
924
focusHandle.listeners = {
929
focusHandle.listeners[Y.stamp(this, true)] = true;
930
focusHandle.listeners.count++;
933
// Document doesn't receive focus in Webkit when the user mouses
934
// down on it, so the "focused" attribute won't get set to the
935
// correct value. Keeping this instance based for now, potential better performance.
936
// Otherwise we'll end up looking up widgets from the DOM on every mousedown.
938
this._hDocMouseDown = oDocument.on("mousedown", this._onDocMouseDown, this);
946
_unbindDOM : function(boundingBox) {
948
var focusHandle = Widget._hDocFocus,
949
yuid = Y.stamp(this, true),
951
mouseHandle = this._hDocMouseDown;
955
focusListeners = focusHandle.listeners;
957
if (focusListeners[yuid]) {
958
delete focusListeners[yuid];
959
focusListeners.count--;
962
if (focusListeners.count === 0) {
963
focusHandle.detach();
964
Widget._hDocFocus = null;
968
if (WEBKIT && mouseHandle) {
969
mouseHandle.detach();
974
* Updates the widget UI to reflect the attribute state.
979
_syncUI: function() {
980
this._syncAttrUI(this._UI_ATTRS.SYNC);
984
* Sets the height on the widget's bounding box element
986
* @method _uiSetHeight
988
* @param {String | Number} val
990
_uiSetHeight: function(val) {
991
this._uiSetDim(HEIGHT, val);
992
this._uiSizeCB((val !== EMPTY_STR && val !== AUTO));
996
* Sets the width on the widget's bounding box element
998
* @method _uiSetWidth
1000
* @param {String | Number} val
1002
_uiSetWidth: function(val) {
1003
this._uiSetDim(WIDTH, val);
1009
* @param {String} dim The dimension - "width" or "height"
1010
* @param {Number | String} val The value to set
1012
_uiSetDim: function(dimension, val) {
1013
this.get(BOUNDING_BOX).setStyle(dimension, L.isNumber(val) ? val + this.DEF_UNIT : val);
1017
* Sets the visible state for the UI
1019
* @method _uiSetVisible
1021
* @param {boolean} val
1023
_uiSetVisible: function(val) {
1024
this.get(BOUNDING_BOX).toggleClass(this.getClassName(HIDDEN), !val);
1028
* Sets the disabled state for the UI
1030
* @method _uiSetDisabled
1032
* @param {boolean} val
1034
_uiSetDisabled: function(val) {
1035
this.get(BOUNDING_BOX).toggleClass(this.getClassName(DISABLED), val);
1039
* Sets the focused state for the UI
1041
* @method _uiSetFocused
1043
* @param {boolean} val
1044
* @param {string} src String representing the source that triggered an update to
1047
_uiSetFocused: function(val, src) {
1048
var boundingBox = this.get(BOUNDING_BOX);
1049
boundingBox.toggleClass(this.getClassName(FOCUSED), val);
1053
boundingBox.focus();
1061
* Set the tabIndex on the widget's rendered UI
1063
* @method _uiSetTabIndex
1067
_uiSetTabIndex: function(index) {
1068
var boundingBox = this.get(BOUNDING_BOX);
1070
if (L.isNumber(index)) {
1071
boundingBox.set(TAB_INDEX, index);
1073
boundingBox.removeAttribute(TAB_INDEX);
1078
* @method _onDocMouseDown
1079
* @description "mousedown" event handler for the owner document of the
1080
* widget's bounding box.
1082
* @param {EventFacade} evt The event facade for the DOM focus event
1084
_onDocMouseDown: function (evt) {
1085
if (this._domFocus) {
1086
this._onDocFocus(evt);
1091
* DOM focus event handler, used to sync the state of the Widget with the DOM
1093
* @method _onDocFocus
1095
* @param {EventFacade} evt The event facade for the DOM focus event
1097
_onDocFocus: function (evt) {
1098
var widget = Widget.getByNode(evt.target),
1099
activeWidget = Widget._active;
1101
if (activeWidget && (activeWidget !== widget)) {
1102
activeWidget._domFocus = false;
1103
activeWidget._set(FOCUSED, false, {src:UI});
1105
Widget._active = null;
1109
widget._domFocus = true;
1110
widget._set(FOCUSED, true, {src:UI});
1112
Widget._active = widget;
1117
* Generic toString implementation for all widgets.
1120
* @return {String} The default string value for the widget [ displays the NAME of the instance, and the unique id ]
1122
toString: function() {
1123
// Using deprecated name prop for kweight squeeze.
1124
return this.name + "[" + this.get(ID) + "]";
1128
* Default unit to use for dimension values
1130
* @property DEF_UNIT
1136
* Default node to render the bounding box to. If not set,
1137
* will default to the current document body.
1139
* @property DEF_PARENT_NODE
1140
* @type String | Node
1142
DEF_PARENT_NODE : null,
1145
* Property defining the markup template for content box. If your Widget doesn't
1146
* need the dual boundingBox/contentBox structure, set CONTENT_TEMPLATE to null,
1147
* and contentBox and boundingBox will both point to the same Node.
1149
* @property CONTENT_TEMPLATE
1152
CONTENT_TEMPLATE : DIV,
1155
* Property defining the markup template for bounding box.
1157
* @property BOUNDING_TEMPLATE
1160
BOUNDING_TEMPLATE : DIV,
1166
_guid : function() {
1171
* @method _validTabIndex
1173
* @param {Number} tabIndex
1175
_validTabIndex : function (tabIndex) {
1176
return (L.isNumber(tabIndex) || L.isNull(tabIndex));
1180
* Binds after listeners for the list of attributes provided
1182
* @method _bindAttrUI
1184
* @param {Array} attrs
1186
_bindAttrUI : function(attrs) {
1190
for (i = 0; i < l; i++) {
1191
this.after(attrs[i] + CHANGE, this._setAttrUI);
1196
* Invokes the _uiSet=ATTR NAME> method for the list of attributes provided
1198
* @method _syncAttrUI
1200
* @param {Array} attrs
1202
_syncAttrUI : function(attrs) {
1203
var i, l = attrs.length, attr;
1204
for (i = 0; i < l; i++) {
1206
this[_UISET + _toInitialCap(attr)](this.get(attr));
1211
* @method _setAttrUI
1213
* @param {EventFacade} e
1215
_setAttrUI : function(e) {
1216
if (e.target === this) {
1217
this[_UISET + _toInitialCap(e.attrName)](e.newVal, e.src);
1222
* The default setter for the strings attribute. Merges partial sets
1223
* into the full string set, to allow users to partial sets of strings
1225
* @method _strSetter
1227
* @param {Object} strings
1228
* @return {String} The full set of strings to set
1230
_strSetter : function(strings) {
1231
return Y.merge(this.get(STRINGS), strings);
1235
* Helper method to get a specific string value
1237
* @deprecated Used by deprecated WidgetLocale implementations.
1239
* @param {String} key
1240
* @return {String} The string
1242
getString : function(key) {
1243
return this.get(STRINGS)[key];
1247
* Helper method to get the complete set of strings for the widget
1249
* @deprecated Used by deprecated WidgetLocale implementations.
1250
* @method getStrings
1251
* @param {String} key
1252
* @return {String} The strings
1254
getStrings : function() {
1255
return this.get(STRINGS);
1259
* The lists of UI attributes to bind and sync for widget's _bindUI and _syncUI implementations
1261
* @property _UI_ATTRS