/*
Copyright (c) 2007, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.2.1
*/
(function() {
/**
* The tabview module provides a widget for managing content bound to tabs.
* @module tabview
* @requires yahoo, dom, event, element
*
*/
/**
* A widget to control tabbed views.
* @namespace YAHOO.widget
* @class TabView
* @extends YAHOO.util.Element
* @constructor
* @param {HTMLElement | String | Object} el(optional) The html
* element that represents the TabView, or the attribute object to use.
* An element will be created if none provided.
* @param {Object} attr (optional) A key map of the tabView's
* initial attributes. Ignored if first arg is attributes object.
*/
YAHOO.widget.TabView = function(el, attr) {
attr = attr || {};
if (arguments.length == 1 && !YAHOO.lang.isString(el) && !el.nodeName) {
attr = el; // treat first arg as attr object
el = attr.element || null;
}
if (!el && !attr.element) { // create if we dont have one
el = _createTabViewElement.call(this, attr);
}
YAHOO.widget.TabView.superclass.constructor.call(this, el, attr);
};
YAHOO.extend(YAHOO.widget.TabView, YAHOO.util.Element);
var proto = YAHOO.widget.TabView.prototype;
var Dom = YAHOO.util.Dom;
var Event = YAHOO.util.Event;
var Tab = YAHOO.widget.Tab;
/**
* The className to add when building from scratch.
* @property CLASSNAME
* @default "navset"
*/
proto.CLASSNAME = 'yui-navset';
/**
* The className of the HTMLElement containing the TabView's tab elements
* to look for when building from existing markup, or to add when building
* from scratch.
* All childNodes of the tab container are treated as Tabs when building
* from existing markup.
* @property TAB_PARENT_CLASSNAME
* @default "nav"
*/
proto.TAB_PARENT_CLASSNAME = 'yui-nav';
/**
* The className of the HTMLElement containing the TabView's label elements
* to look for when building from existing markup, or to add when building
* from scratch.
* All childNodes of the content container are treated as content elements when
* building from existing markup.
* @property CONTENT_PARENT_CLASSNAME
* @default "nav-content"
*/
proto.CONTENT_PARENT_CLASSNAME = 'yui-content';
proto._tabParent = null;
proto._contentParent = null;
/**
* Adds a Tab to the TabView instance.
* If no index is specified, the tab is added to the end of the tab list.
* @method addTab
* @param {YAHOO.widget.Tab} tab A Tab instance to add.
* @param {Integer} index The position to add the tab.
* @return void
*/
proto.addTab = function(tab, index) {
var tabs = this.get('tabs');
if (!tabs) { // not ready yet
this._queue[this._queue.length] = ['addTab', arguments];
return false;
}
index = (index === undefined) ? tabs.length : index;
var before = this.getTab(index);
var self = this;
var el = this.get('element');
var tabParent = this._tabParent;
var contentParent = this._contentParent;
var tabElement = tab.get('element');
var contentEl = tab.get('contentEl');
if ( before ) {
tabParent.insertBefore(tabElement, before.get('element'));
} else {
tabParent.appendChild(tabElement);
}
if ( contentEl && !Dom.isAncestor(contentParent, contentEl) ) {
contentParent.appendChild(contentEl);
}
if ( !tab.get('active') ) {
tab.set('contentVisible', false, true); /* hide if not active */
} else {
this.set('activeTab', tab, true);
}
var activate = function(e) {
YAHOO.util.Event.preventDefault(e);
self.set('activeTab', this);
};
tab.addListener( tab.get('activationEvent'), activate);
tab.addListener('activationEventChange', function(e) {
if (e.prevValue != e.newValue) {
tab.removeListener(e.prevValue, activate);
tab.addListener(e.newValue, activate);
}
});
tabs.splice(index, 0, tab);
};
/**
* Routes childNode events.
* @method DOMEventHandler
* @param {event} e The Dom event that is being handled.
* @return void
*/
proto.DOMEventHandler = function(e) {
var el = this.get('element');
var target = YAHOO.util.Event.getTarget(e);
var tabParent = this._tabParent;
if (Dom.isAncestor(tabParent, target) ) {
var tabEl;
var tab = null;
var contentEl;
var tabs = this.get('tabs');
for (var i = 0, len = tabs.length; i < len; i++) {
tabEl = tabs[i].get('element');
contentEl = tabs[i].get('contentEl');
if ( target == tabEl || Dom.isAncestor(tabEl, target) ) {
tab = tabs[i];
break; // note break
}
}
if (tab) {
tab.fireEvent(e.type, e);
}
}
};
/**
* Returns the Tab instance at the specified index.
* @method getTab
* @param {Integer} index The position of the Tab.
* @return YAHOO.widget.Tab
*/
proto.getTab = function(index) {
return this.get('tabs')[index];
};
/**
* Returns the index of given tab.
* @method getTabIndex
* @param {YAHOO.widget.Tab} tab The tab whose index will be returned.
* @return int
*/
proto.getTabIndex = function(tab) {
var index = null;
var tabs = this.get('tabs');
for (var i = 0, len = tabs.length; i < len; ++i) {
if (tab == tabs[i]) {
index = i;
break;
}
}
return index;
};
/**
* Removes the specified Tab from the TabView.
* @method removeTab
* @param {YAHOO.widget.Tab} item The Tab instance to be removed.
* @return void
*/
proto.removeTab = function(tab) {
var tabCount = this.get('tabs').length;
var index = this.getTabIndex(tab);
var nextIndex = index + 1;
if ( tab == this.get('activeTab') ) { // select next tab
if (tabCount > 1) {
if (index + 1 == tabCount) {
this.set('activeIndex', index - 1);
} else {
this.set('activeIndex', index + 1);
}
}
}
this._tabParent.removeChild( tab.get('element') );
this._contentParent.removeChild( tab.get('contentEl') );
this._configs.tabs.value.splice(index, 1);
};
/**
* Provides a readable name for the TabView instance.
* @method toString
* @return String
*/
proto.toString = function() {
var name = this.get('id') || this.get('tagName');
return "TabView " + name;
};
/**
* The transiton to use when switching between tabs.
* @method contentTransition
*/
proto.contentTransition = function(newTab, oldTab) {
newTab.set('contentVisible', true);
oldTab.set('contentVisible', false);
};
/**
* setAttributeConfigs TabView specific properties.
* @method initAttributes
* @param {Object} attr Hash of initial attributes
*/
proto.initAttributes = function(attr) {
YAHOO.widget.TabView.superclass.initAttributes.call(this, attr);
if (!attr.orientation) {
attr.orientation = 'top';
}
var el = this.get('element');
/**
* The Tabs belonging to the TabView instance.
* @config tabs
* @type Array
*/
this.setAttributeConfig('tabs', {
value: [],
readOnly: true
});
/**
* The container of the tabView's label elements.
* @property _tabParent
* @private
* @type HTMLElement
*/
this._tabParent =
this.getElementsByClassName(this.TAB_PARENT_CLASSNAME,
'ul' )[0] || _createTabParent.call(this);
/**
* The container of the tabView's content elements.
* @property _contentParent
* @type HTMLElement
* @private
*/
this._contentParent =
this.getElementsByClassName(this.CONTENT_PARENT_CLASSNAME,
'div')[0] || _createContentParent.call(this);
/**
* How the Tabs should be oriented relative to the TabView.
* @config orientation
* @type String
* @default "top"
*/
this.setAttributeConfig('orientation', {
value: attr.orientation,
method: function(value) {
var current = this.get('orientation');
this.addClass('yui-navset-' + value);
if (current != value) {
this.removeClass('yui-navset-' + current);
}
switch(value) {
case 'bottom':
this.appendChild(this._tabParent);
break;
}
}
});
/**
* The index of the tab currently active.
* @config activeIndex
* @type Int
*/
this.setAttributeConfig('activeIndex', {
value: attr.activeIndex,
method: function(value) {
this.set('activeTab', this.getTab(value));
},
validator: function(value) {
return !this.getTab(value).get('disabled'); // cannot activate if disabled
}
});
/**
* The tab currently active.
* @config activeTab
* @type YAHOO.widget.Tab
*/
this.setAttributeConfig('activeTab', {
value: attr.activeTab,
method: function(tab) {
var activeTab = this.get('activeTab');
if (tab) {
tab.set('active', true);
this._configs['activeIndex'].value = this.getTabIndex(tab); // keep in sync
}
if (activeTab && activeTab != tab) {
activeTab.set('active', false);
}
if (activeTab && tab != activeTab) { // no transition if only 1
this.contentTransition(tab, activeTab);
} else if (tab) {
tab.set('contentVisible', true);
}
},
validator: function(value) {
return !value.get('disabled'); // cannot activate if disabled
}
});
if ( this._tabParent ) {
_initTabs.call(this);
}
for (var type in this.DOM_EVENTS) {
if ( YAHOO.lang.hasOwnProperty(this.DOM_EVENTS, type) ) {
this.addListener.call(this, type, this.DOMEventHandler);
}
}
};
/**
* Creates Tab instances from a collection of HTMLElements.
* @method createTabs
* @private
* @param {Array|HTMLCollection} elements The elements to use for Tabs.
* @return void
*/
var _initTabs = function() {
var tab,
attr,
contentEl;
var el = this.get('element');
var tabs = _getChildNodes(this._tabParent);
var contentElements = _getChildNodes(this._contentParent);
for (var i = 0, len = tabs.length; i < len; ++i) {
attr = {};
if (contentElements[i]) {
attr.contentEl = contentElements[i];
}
tab = new YAHOO.widget.Tab(tabs[i], attr);
this.addTab(tab);
if (tab.hasClass(tab.ACTIVE_CLASSNAME) ) {
this._configs.activeTab.value = tab; // dont invoke method
}
}
};
var _createTabViewElement = function(attr) {
var el = document.createElement('div');
if ( this.CLASSNAME ) {
el.className = this.CLASSNAME;
}
return el;
};
var _createTabParent = function(attr) {
var el = document.createElement('ul');
if ( this.TAB_PARENT_CLASSNAME ) {
el.className = this.TAB_PARENT_CLASSNAME;
}
this.get('element').appendChild(el);
return el;
};
var _createContentParent = function(attr) {
var el = document.createElement('div');
if ( this.CONTENT_PARENT_CLASSNAME ) {
el.className = this.CONTENT_PARENT_CLASSNAME;
}
this.get('element').appendChild(el);
return el;
};
var _getChildNodes = function(el) {
var nodes = [];
var childNodes = el.childNodes;
for (var i = 0, len = childNodes.length; i < len; ++i) {
if (childNodes[i].nodeType == 1) {
nodes[nodes.length] = childNodes[i];
}
}
return nodes;
};
/**
* Fires before the activeTab is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p>If handler returns false, the change will be cancelled, and the value will not
* be set.</p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> beforeActiveTabChange<br>
* <code><<a href="YAHOO.widget.Tab.html">YAHOO.widget.Tab</a>>
* prevValue</code> the currently active tab<br>
* <code><<a href="YAHOO.widget.Tab.html">YAHOO.widget.Tab</a>>
* newValue</code> the tab to be made active</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('beforeActiveTabChange', handler);</code></p>
* @event beforeActiveTabChange
*/
/**
* Fires after the activeTab is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> activeTabChange<br>
* <code><<a href="YAHOO.widget.Tab.html">YAHOO.widget.Tab</a>>
* prevValue</code> the formerly active tab<br>
* <code><<a href="YAHOO.widget.Tab.html">YAHOO.widget.Tab</a>>
* newValue</code> the new active tab</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('activeTabChange', handler);</code></p>
* @event activeTabChange
*/
/**
* Fires before the orientation is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p>If handler returns false, the change will be cancelled, and the value will not
* be set.</p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> beforeOrientationChange<br>
* <code><String>
* prevValue</code> the current orientation<br>
* <code><String>
* newValue</code> the new orientation to be applied</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('beforeOrientationChange', handler);</code></p>
* @event beforeOrientationChange
*/
/**
* Fires after the orientation is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> orientationChange<br>
* <code><String>
* prevValue</code> the former orientation<br>
* <code><String>
* newValue</code> the new orientation</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('orientationChange', handler);</code></p>
* @event orientationChange
*/
})();
(function() {
var Dom = YAHOO.util.Dom,
Event = YAHOO.util.Event;
/**
* A representation of a Tab's label and content.
* @namespace YAHOO.widget
* @class Tab
* @extends YAHOO.util.Element
* @constructor
* @param element {HTMLElement | String} (optional) The html element that
* represents the TabView. An element will be created if none provided.
* @param {Object} properties A key map of initial properties
*/
var Tab = function(el, attr) {
attr = attr || {};
if (arguments.length == 1 && !YAHOO.lang.isString(el) && !el.nodeName) {
attr = el;
el = attr.element;
}
if (!el && !attr.element) {
el = _createTabElement.call(this, attr);
}
this.loadHandler = {
success: function(o) {
this.set('content', o.responseText);
},
failure: function(o) {
}
};
Tab.superclass.constructor.call(this, el, attr);
this.DOM_EVENTS = {}; // delegating to tabView
};
YAHOO.extend(Tab, YAHOO.util.Element);
var proto = Tab.prototype;
/**
* The default tag name for a Tab's inner element.
* @property LABEL_INNER_TAGNAME
* @type String
* @default "em"
*/
proto.LABEL_TAGNAME = 'em';
/**
* The class name applied to active tabs.
* @property ACTIVE_CLASSNAME
* @type String
* @default "on"
*/
proto.ACTIVE_CLASSNAME = 'selected';
/**
* The class name applied to disabled tabs.
* @property DISABLED_CLASSNAME
* @type String
* @default "disabled"
*/
proto.DISABLED_CLASSNAME = 'disabled';
/**
* The class name applied to dynamic tabs while loading.
* @property LOADING_CLASSNAME
* @type String
* @default "disabled"
*/
proto.LOADING_CLASSNAME = 'loading';
/**
* Provides a reference to the connection request object when data is
* loaded dynamically.
* @property dataConnection
* @type Object
*/
proto.dataConnection = null;
/**
* Object containing success and failure callbacks for loading data.
* @property loadHandler
* @type object
*/
proto.loadHandler = null;
/**
* Provides a readable name for the tab.
* @method toString
* @return String
*/
proto.toString = function() {
var el = this.get('element');
var id = el.id || el.tagName;
return "Tab " + id;
};
/**
* setAttributeConfigs TabView specific properties.
* @method initAttributes
* @param {Object} attr Hash of initial attributes
*/
proto.initAttributes = function(attr) {
attr = attr || {};
Tab.superclass.initAttributes.call(this, attr);
var el = this.get('element');
/**
* The event that triggers the tab's activation.
* @config activationEvent
* @type String
*/
this.setAttributeConfig('activationEvent', {
value: attr.activationEvent || 'click'
});
/**
* The element that contains the tab's label.
* @config labelEl
* @type HTMLElement
*/
this.setAttributeConfig('labelEl', {
value: attr.labelEl || _getlabelEl.call(this),
method: function(value) {
var current = this.get('labelEl');
if (current) {
if (current == value) {
return false; // already set
}
this.replaceChild(value, current);
} else if (el.firstChild) { // ensure label is firstChild by default
this.insertBefore(value, el.firstChild);
} else {
this.appendChild(value);
}
}
});
/**
* The tab's label text (or innerHTML).
* @config label
* @type String
*/
this.setAttributeConfig('label', {
value: attr.label || _getLabel.call(this),
method: function(value) {
var labelEl = this.get('labelEl');
if (!labelEl) { // create if needed
this.set('labelEl', _createlabelEl.call(this));
}
_setLabel.call(this, value);
}
});
/**
* The HTMLElement that contains the tab's content.
* @config contentEl
* @type HTMLElement
*/
this.setAttributeConfig('contentEl', {
value: attr.contentEl || document.createElement('div'),
method: function(value) {
var current = this.get('contentEl');
if (current) {
if (current == value) {
return false; // already set
}
this.replaceChild(value, current);
}
}
});
/**
* The tab's content.
* @config content
* @type String
*/
this.setAttributeConfig('content', {
value: attr.content,
method: function(value) {
this.get('contentEl').innerHTML = value;
}
});
var _dataLoaded = false;
/**
* The tab's data source, used for loading content dynamically.
* @config dataSrc
* @type String
*/
this.setAttributeConfig('dataSrc', {
value: attr.dataSrc
});
/**
* Whether or not content should be reloaded for every view.
* @config cacheData
* @type Boolean
* @default false
*/
this.setAttributeConfig('cacheData', {
value: attr.cacheData || false,
validator: YAHOO.lang.isBoolean
});
/**
* The method to use for the data request.
* @config loadMethod
* @type String
* @default "GET"
*/
this.setAttributeConfig('loadMethod', {
value: attr.loadMethod || 'GET',
validator: YAHOO.lang.isString
});
/**
* Whether or not any data has been loaded from the server.
* @config dataLoaded
* @type Boolean
*/
this.setAttributeConfig('dataLoaded', {
value: false,
validator: YAHOO.lang.isBoolean,
writeOnce: true
});
/**
* Number if milliseconds before aborting and calling failure handler.
* @config dataTimeout
* @type Number
* @default null
*/
this.setAttributeConfig('dataTimeout', {
value: attr.dataTimeout || null,
validator: YAHOO.lang.isNumber
});
/**
* Whether or not the tab is currently active.
* If a dataSrc is set for the tab, the content will be loaded from
* the given source.
* @config active
* @type Boolean
*/
this.setAttributeConfig('active', {
value: attr.active || this.hasClass(this.ACTIVE_CLASSNAME),
method: function(value) {
if (value === true) {
this.addClass(this.ACTIVE_CLASSNAME);
this.set('title', 'active');
} else {
this.removeClass(this.ACTIVE_CLASSNAME);
this.set('title', '');
}
},
validator: function(value) {
return YAHOO.lang.isBoolean(value) && !this.get('disabled') ;
}
});
/**
* Whether or not the tab is disabled.
* @config disabled
* @type Boolean
*/
this.setAttributeConfig('disabled', {
value: attr.disabled || this.hasClass(this.DISABLED_CLASSNAME),
method: function(value) {
if (value === true) {
Dom.addClass(this.get('element'), this.DISABLED_CLASSNAME);
} else {
Dom.removeClass(this.get('element'), this.DISABLED_CLASSNAME);
}
},
validator: YAHOO.lang.isBoolean
});
/**
* The href of the tab's anchor element.
* @config href
* @type String
* @default '#'
*/
this.setAttributeConfig('href', {
value: attr.href || '#',
method: function(value) {
this.getElementsByTagName('a')[0].href = value;
},
validator: YAHOO.lang.isString
});
/**
* The Whether or not the tab's content is visible.
* @config contentVisible
* @type Boolean
* @default false
*/
this.setAttributeConfig('contentVisible', {
value: attr.contentVisible,
method: function(value) {
if (value) {
this.get('contentEl').style.display = 'block';
if ( this.get('dataSrc') ) {
// load dynamic content unless already loaded and caching
if ( !this.get('dataLoaded') || !this.get('cacheData') ) {
_dataConnect.call(this);
}
}
} else {
this.get('contentEl').style.display = 'none';
}
},
validator: YAHOO.lang.isBoolean
});
};
var _createTabElement = function(attr) {
var el = document.createElement('li');
var a = document.createElement('a');
a.href = attr.href || '#';
el.appendChild(a);
var label = attr.label || null;
var labelEl = attr.labelEl || null;
if (labelEl) { // user supplied labelEl
if (!label) { // user supplied label
label = _getLabel.call(this, labelEl);
}
} else {
labelEl = _createlabelEl.call(this);
}
a.appendChild(labelEl);
return el;
};
var _getlabelEl = function() {
return this.getElementsByTagName(this.LABEL_TAGNAME)[0];
};
var _createlabelEl = function() {
var el = document.createElement(this.LABEL_TAGNAME);
return el;
};
var _setLabel = function(label) {
var el = this.get('labelEl');
el.innerHTML = label;
};
var _getLabel = function() {
var label,
el = this.get('labelEl');
if (!el) {
return undefined;
}
return el.innerHTML;
};
var _dataConnect = function() {
if (!YAHOO.util.Connect) {
return false;
}
Dom.addClass(this.get('contentEl').parentNode, this.LOADING_CLASSNAME);
this.dataConnection = YAHOO.util.Connect.asyncRequest(
this.get('loadMethod'),
this.get('dataSrc'),
{
success: function(o) {
this.loadHandler.success.call(this, o);
this.set('dataLoaded', true);
this.dataConnection = null;
Dom.removeClass(this.get('contentEl').parentNode,
this.LOADING_CLASSNAME);
},
failure: function(o) {
this.loadHandler.failure.call(this, o);
this.dataConnection = null;
Dom.removeClass(this.get('contentEl').parentNode,
this.LOADING_CLASSNAME);
},
scope: this,
timeout: this.get('dataTimeout')
}
);
};
YAHOO.widget.Tab = Tab;
/**
* Fires before the active state is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p>If handler returns false, the change will be cancelled, and the value will not
* be set.</p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> beforeActiveChange<br>
* <code><Boolean>
* prevValue</code> the current value<br>
* <code><Boolean>
* newValue</code> the new value</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('beforeActiveChange', handler);</code></p>
* @event beforeActiveChange
*/
/**
* Fires after the active state is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> activeChange<br>
* <code><Boolean>
* prevValue</code> the previous value<br>
* <code><Boolean>
* newValue</code> the updated value</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('activeChange', handler);</code></p>
* @event activeChange
*/
/**
* Fires before the tab label is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p>If handler returns false, the change will be cancelled, and the value will not
* be set.</p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> beforeLabelChange<br>
* <code><String>
* prevValue</code> the current value<br>
* <code><String>
* newValue</code> the new value</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('beforeLabelChange', handler);</code></p>
* @event beforeLabelChange
*/
/**
* Fires after the tab label is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> labelChange<br>
* <code><String>
* prevValue</code> the previous value<br>
* <code><String>
* newValue</code> the updated value</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('labelChange', handler);</code></p>
* @event labelChange
*/
/**
* Fires before the tab content is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p>If handler returns false, the change will be cancelled, and the value will not
* be set.</p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> beforeContentChange<br>
* <code><String>
* prevValue</code> the current value<br>
* <code><String>
* newValue</code> the new value</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('beforeContentChange', handler);</code></p>
* @event beforeContentChange
*/
/**
* Fires after the tab content is changed.
* <p>See: <a href="YAHOO.util.Element.html#addListener">Element.addListener</a></p>
* <p><strong>Event fields:</strong><br>
* <code><String> type</code> contentChange<br>
* <code><String>
* prevValue</code> the previous value<br>
* <code><Boolean>
* newValue</code> the updated value</p>
* <p><strong>Usage:</strong><br>
* <code>var handler = function(e) {var previous = e.prevValue};<br>
* myTabs.addListener('contentChange', handler);</code></p>
* @event contentChange
*/
})();
YAHOO.register("tabview", YAHOO.widget.TabView, {version: "2.2.1", build: "193"});