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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>YUI Library Examples: Button Control: Using A Menu Button To Replace A &#60;select&#62; Element</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<link rel="stylesheet" type="text/css" href="../../assets/yui.css" >
<style>
/*Supplemental CSS for the YUI distribution*/
#custom-doc { width: 95%; min-width: 950px; }
#pagetitle {background-image: url(../../assets/bg_hd.gif);}
</style>
<link rel="stylesheet" type="text/css" href="../../assets/dpSyntaxHighlighter.css">
<!--Script and CSS includes for YUI dependencies on this page-->
<link rel="stylesheet" type="text/css" href="../../build/menu/assets/skins/sam/menu.css" />
<link rel="stylesheet" type="text/css" href="../../build/button/assets/skins/sam/button.css" />
<script type="text/javascript" src="../../build/yuiloader/yuiloader-min.js"></script>
<script type="text/javascript" src="../../build/dom/dom-min.js"></script>
<script type="text/javascript" src="../../build/event/event-min.js"></script>
<script type="text/javascript" src="../../build/container/container_core-min.js"></script>
<script type="text/javascript" src="../../build/menu/menu-min.js"></script>
<script type="text/javascript" src="../../build/element/element-min.js"></script>
<script type="text/javascript" src="../../build/button/button-min.js"></script>
<!--begin custom header content for this example-->
<style type="text/css">
/* Style the <fieldset> since the Reset CSS removes the default style. */
#button-example-form fieldset {
border: 2px groove #ccc;
margin: .5em;
padding: .5em;
}
pre {
border: solid 1px #000;
background-color: #ccc;
padding: 10px;
margin: 10px;
}
.yui-menu-button em.yui-button-label {
font-style: normal;
display: block;
text-align: left;
white-space: nowrap;
/* Restrict the width of the label to 5em. */
width: 5em;
/* Hide the overflow if the text label exceeds 5em in width. */
overflow: hidden;
/*
IE, Safari and Opera support the ability to add ellipsis when the text
label exceeds 10em in width.
*/
text-overflow: ellipsis;
-o-text-overflow: ellipsis;
}
li.yui-button-selectedmenuitem {
background: url(../button/assets/checkbox.png) left center no-repeat;
}
</style>
<!--end custom header content for this example-->
<script type="text/javascript">
//enable passthrough of errors from YUI Event:
if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
YAHOO.util.Event.throwErrors = true;
}
</script>
</head>
<body id="yahoo-com" class="yui-skin-sam">
<div id="custom-doc" class="yui-t2">
<div id="hd">
<div id="ygunav">
<p><em><a href="http://developer.yahoo.com/yui/">YUI Library Home</a></em></p>
<form action="http://search.yahoo.com/search" id="sitesearchform">
<input name="vs" type="hidden" value="developer.yahoo.com">
<input name="vs" type="hidden" value="yuiblog.com">
<div id="sitesearch">
<label for="searchinput">Site Search (YDN &amp; YUIBlog): </label>
<input type="text" id="searchinput" name="p">
<input type="submit" value="Search" id="searchsubmit" class="ygbt">
</div>
</form> </div>
<div id="ygma"><a href="../../"><img src="../../assets/yui.gif" border="0" height="38"></a></div>
<div id="pagetitle"><h1>YUI Library Examples: Button Control: Using A Menu Button To Replace A &#60;select&#62; Element</h1></div>
</div>
<div id="bd">
<div id="yui-main">
<div class="yui-b">
<div class="yui-ge">
<div class="yui-u first example">
<div class="promo">
<h1>Button Control: Using A Menu Button To Replace A &#60;select&#62; Element</h1>
<div class="exampleIntro">
<p>
This example illustrates how to use Button to mimic the behavior of an
HTML <code>&#60;select&#62;</code> element.
</p>
</div>
<div class="example-container module ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="button-menu-select_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<script type="text/javascript">
YAHOO.util.Event.onDOMReady(function () {
var Button = YAHOO.widget.Button;
// "render" event handler for a Button's Menu - responsible for setting
// the default value for the Button's "selectedMenuItem" attribute.
var onMenuRender = function (type, args, button) {
button.set("selectedMenuItem", this.getItem(0));
};
// "selectedMenuItemChange" event handler for a Button that will set
// the Button's "label" attribute to the value of the "text"
// configuration property of the MenuItem that was clicked.
var onSelectedMenuItemChange = function (event) {
var oMenuItem = event.newValue;
this.set("label", ("<em class=\"yui-button-label\">" +
oMenuItem.cfg.getProperty("text") + "</em>"));
};
// "submit" event handler for a Button's parent form - repsonsible for
// rendering a Menu that was to be lazy loaded, but never clicked on,
// and therefore never rendered.
var onFormSubmit = function (event, button) {
var oMenuItem = button.get("selectedMenuItem"),
UA = YAHOO.env.ua,
oEvent,
oMenu;
if (!oMenuItem) {
// Pause submission of the form until the Button's Menu
// is rendered
YAHOO.util.Event.preventDefault(event);
oMenu = button.getMenu();
oMenu.addItems(oMenu.itemData);
oMenu.subscribe("render", function () {
var bSubmitForm;
if (UA.ie) {
bSubmitForm = this.fireEvent("onsubmit");
}
else { // Gecko, Opera, and Safari
oEvent = document.createEvent("HTMLEvents");
oEvent.initEvent("submit", true, true);
bSubmitForm = this.dispatchEvent(oEvent);
}
// In IE and Safari, dispatching a "submit" event to a form
// WILL cause the form's "submit" event to fire, but WILL
// NOT submit the form. Therefore, we need to call the
// "submit" method as well.
if ((UA.ie || UA.webkit) && bSubmitForm) {
this.submit();
}
}, this, true);
oMenu.render(oMenu.cfg.getProperty("container"));
}
};
var oMenuButton1 = new Button({
id: "menubutton-1",
name: "menubutton-1",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
menu: "select-1",
container: "select-1-container"
});
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton1.on("selectedMenuItemChange", onSelectedMenuItemChange);
var oMenuButton2 = new Button({
id: "menubutton-2",
name: "menubutton-2",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
lazyloadmenu: false,
menu: "select-2",
container: "select-2-container"
});
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton2.on("selectedMenuItemChange", onSelectedMenuItemChange);
var aMenuButton3MenuData = [
{ text: "Option 1", value: "menubutton-3-1" },
{ text: "Option 2", value: "menubutton-3-2" },
{ text: "Option 3", value: "menubutton-3-3" }
];
var oMenuButton3 = new Button({
id: "menubutton-3",
name: "menubutton-3",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
menu: aMenuButton3MenuData,
container: "menubutton-3-container" });
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton3.on("selectedMenuItemChange", onSelectedMenuItemChange);
oMenuButton3.on("appendTo", function () {
var oMenu = this.getMenu();
// If a Button's "selectedMenuItem" attribute is set, the selected
// MenuItem's name and value will be part of the form's data set
// when its parent form is submitted. For Buttons with Menus built
// entirely from script, the "selectedMenuItem" property is not
// set by default. To set the "selectedMenuItem" to a default
// value, simply register a "render" event handler for the Button's
// Menu that sets the Button's "selectedMenuItem" attribute to the
// desired item in the Menu.
oMenu.subscribe("render", onMenuRender, this);
// The items in a Button's Menu are lazy loaded by default: loaded
// when the Button is initially clicked. If the user never clicks
// on the Button, its Menu will never be rendered, meaning the
// "render" event handler registered above will never be called,
// and the default value for the Button's "selectMenuItem"
// attribute will never be set. Therefore, add a "submit" event
// handler to the Button's parent form that will render the Menu
// if the Button's "selectedMenuItem" attribute is not set.
YAHOO.util.Event.on(this.getForm(), "submit", onFormSubmit, this);
});
var aMenuButton4MenuData = [
{ text: "Option 1", value: "menubutton-4-1" },
{ text: "Option 2", value: "menubutton-4-2" },
{ text: "Option 3", value: "menubutton-4-3" }
];
var oMenuButton4 = new Button({
id: "menubutton-4",
name: "menubutton-4",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
lazyloadmenu: false,
menu: aMenuButton4MenuData,
container: "menubutton-4-container" });
var oMenuButton4Menu = oMenuButton4.getMenu();
// If a Button's "selectedMenuItem" attribute is set, the selected
// MenuItem's name and value will be part of the form's data set
// when its parent form is submitted. For Buttons with Menus built
// entirely from script, the "selectedMenuItem" property is not set by
// default. To set the "selectedMenuItem" to a default value, simply
// register a "render" event handler for the Button's Menu that sets
// the Button's "selectedMenuItem" attribute to the desired item in
// the Menu.
oMenuButton4Menu.subscribe("render", onMenuRender, oMenuButton4);
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton4.on("selectedMenuItemChange", onSelectedMenuItemChange);
var oMenuButton5 = new Button({
id: "menubutton-5",
name: "menubutton-5",
label: "<em class=\"yui-button-label\">None</em>",
type: "menu",
menu: "select-3",
container: "select-3-container" });
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton5.on("selectedMenuItemChange", onSelectedMenuItemChange);
var oMenuButton6 = new Button({
id: "menubutton-6",
name: "menubutton-6",
label: "<em class=\"yui-button-label\">None</em>",
type: "menu",
lazyloadmenu: false,
menu: "select-4",
container: "select-4-container" });
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton6.on("selectedMenuItemChange", onSelectedMenuItemChange);
var aMenuButton7MenuData = [
"None",
{ text: "Option 1", value: "menubutton-7-1" },
{ text: "Option 2", value: "menubutton-7-2" },
{ text: "Option 3", value: "menubutton-7-3" }
];
var oMenuButton7 = new Button({
id: "menubutton-7",
name: "menubutton-7",
label: "<em class=\"yui-button-label\">None</em>",
type: "menu",
menu: aMenuButton7MenuData,
container: "menubutton-7-container" });
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton7.on("selectedMenuItemChange", onSelectedMenuItemChange);
var aMenuButton8MenuData = [
"None",
{ text: "Option 1", value: "menubutton-8-1" },
{ text: "Option 2", value: "menubutton-8-2" },
{ text: "Option 3", value: "menubutton-8-3" }
];
var oMenuButton8 = new Button({
id: "menubutton-8",
name: "menubutton-8",
label: "<em class=\"yui-button-label\">None</em>",
type: "menu",
lazyloadmenu: false,
menu: aMenuButton8MenuData,
container: "menubutton-8-container" });
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton8.on("selectedMenuItemChange", onSelectedMenuItemChange);
});
</script>
<form name="button-example-form" id="button-example-form" method="post" action="#">
<fieldset>
<legend>With A Default Value</legend>
<fieldset>
<legend>Using Existing Markup</legend>
<fieldset>
<legend>Lazy load on</legend>
<label id="select-1-container">
Choose a value:
<select id="select-1" name="select-1">
<option value="select-1-1" selected>Option 1</option>
<option value="select-1-2">Option 2</option>
<option value="select-1-3">Option 3</option>
</select>
</label>
</fieldset>
<fieldset>
<legend>Lazy load off</legend>
<label id="select-2-container">
Choose a value:
<select id="select-2" name="select-2">
<option value="select-2-1" selected>Option 1</option>
<option value="select-2-2">Option 2</option>
<option value="select-2-3">Option 3</option>
</select>
</label>
</fieldset>
</fieldset>
<fieldset>
<legend>Without Existing Markup</legend>
<fieldset>
<legend>Lazy load on</legend>
<label id="menubutton-3-container">Choose a value: </label>
</fieldset>
<fieldset>
<legend>Lazy load off</legend>
<label id="menubutton-4-container">Choose a value: </label>
</fieldset>
</fieldset>
</fieldset>
<fieldset>
<legend>Without A Default Value</legend>
<fieldset>
<legend>Using Existing Markup</legend>
<fieldset>
<legend>Lazy load on</legend>
<label id="select-3-container">
Choose a value:
<select id="select-3" name="select-3">
<option value="">None</option>
<option value="select-3-1">Option 1</option>
<option value="select-3-2">Option 2</option>
<option value="select-3-3">Option 3</option>
</select>
</label>
</fieldset>
<fieldset>
<legend>Lazy load off</legend>
<label id="select-4-container">
Choose a value
<select id="select-4" name="select-4">
<option value="">None</option>
<option value="select-4-1">Option 1</option>
<option value="select-4-2">Option 2</option>
<option value="select-4-3">Option 3</option>
</select>
</label>
</fieldset>
</fieldset>
<fieldset>
<legend>Without Existing Markup</legend>
<fieldset>
<legend>Lazy load on</legend>
<label id="menubutton-7-container">Choose a value: </label>
</fieldset>
<fieldset>
<legend>Lazy load off</legend>
<label id="menubutton-8-container">Choose a value: </label>
</fieldset>
</fieldset>
</fieldset>
<div>
<input type="submit" id="submit-button" name="submit-button" value="Submit Form">
</div>
</form>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<p>
By including the <a href="/yui/menu/">Menu family of controls</a>, it is
possible to create menu buttons that mimic the behavior of HTML
<code>&#60;select&#62;</code> elements.
</p>
<h2>Basic Setup</h2>
<p>
Menu buttons can either replace existing <code>&#60;select&#62;</code> elements
or can be created completely from script.
</p>
<h3>Using Existing Markup</h3>
<p>
To replace an existing <code>&#60;select&#62;</code> element with a menu button,
simply set the Button's <code>menu</code> attribute to the id of the
<code>&#60;select&#62;</code> element using an object literal passed to the
Button's constructor. In this example, the following snippets of HTML and
JavaScript are used to transform the first <code>&#60;select&#62;</code> element
into a menu button.
</p>
<textarea name="code" class="HTML" cols="60" rows="1">
<select id="select-1" name="select-1">
<option value="select-1-1" selected>Option 1</option>
<option value="select-1-2">Option 2</option>
<option value="select-1-3">Option 3</option>
</select>
</textarea>
<textarea name="code" class="JScript" cols="60" rows="1">
var oMenuButton1 = new Button({
id: "menubutton-1",
name: "menubutton-1",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
menu: "select-1",
container: "select-1-container"
});
</textarea>
<h3>Without Existing Markup</h3>
<p>
To create a menu button without existing markup, simply set the <code>menu</code>
configuration property to an array of
<a href="../../docs/YAHOO.widget.MenuItem.html#configList">MenuItem configuration
properties</a>, as illustrated by the code used to create the third menu
button in this example:
</p>
<textarea name="code" class="JScript" cols="60" rows="1">
var aMenuButton3MenuData = [
{ text: "Option 1", value: "menubutton-3-1" },
{ text: "Option 2", value: "menubutton-3-2" },
{ text: "Option 3", value: "menubutton-3-3" }
];
var oMenuButton3 = new Button({
id: "menubutton-3",
name: "menubutton-3",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
menu: aMenuButton3MenuData,
container: "menubutton-3-container" });
</textarea>
<h2><code>&#60;select&#62;</code> Behavior &#38; Style Customizations</h2>
<p>
To mimic the behavior of an HTML <code>&#60;select&#62;</code> element, the
label of the Button needs to reflect the currently selected MenuItem in the
Button's Menu. To update the Button's <code>label</code> attribute when the
user clicks on a MenuItem, simply register a listener for the Button's
<code>selectedMenuItemChange</code> event that sets the value of the
Button's <code>label</code> attribute to the value of the <code>text</code>
configuration property of the selected MenuItem instance. The following
example illustrates how a <code>selectedMenuItemChange</code> event listener
is added to the first Button in this example.
</p>
<textarea name="code" class="JScript" cols="60" rows="1">
// "selectedMenuItemChange" event handler for a Button that will set
// the Button's "label" attribute to the value of the "text"
// configuration property of the MenuItem that was clicked.
var onSelectedMenuItemChange = function (event) {
var oMenuItem = event.newValue;
this.set("label", ("<em class=\"yui-button-label\">" +
oMenuItem.cfg.getProperty("text") + "</em>"));
};
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton1.on("selectedMenuItemChange", onSelectedMenuItemChange);
</textarea>
<p>
It is also necessary to customize the style of the menu button, to indicate
the currently selected item in each Button's menu. When the value of the
Button's <code>selectedMenuItem</code> attribute changes, Button adds a class
named "yui-button-selectedmenuitem" to the <code>&#60;li&#62;</code> element of
the currently selected MenuItem. This class can be used to provide a custom
style to the currently selected MenuItem in a Button's Menu. In this example,
a Button's currently selected MenuItem is rendered with a check mark to the
left of its text label.
</p>
<p>
In addition to styling a Button's selected MenuItem, the label of each Button
in this example is set to a fixed width. This is is accomplished by wrapping
the text label of each Button in an <code>&#60;em&#62;</code> tag and setting
the <code>&#60;em&#62;</code>'s <code>width</code> property to <code>5em</code>,
and the <code>overflow</code> property to <code>hidden</code>.
</p>
<textarea name="code" class="CSS" cols="60" rows="1">
.yui-menu-button em.yui-button-label {
font-style: normal;
display: block;
text-align: left;
white-space: nowrap;
/* Restrict the width of the label to 5em. */
width: 5em;
/* Hide the overflow if the text label exceeds 5em in width. */
overflow: hidden;
/*
IE, Safari and Opera support the ability to add ellipsis when the text
label exceeds 10em in width.
*/
text-overflow: ellipsis;
-o-text-overflow: ellipsis;
}
li.yui-button-selectedmenuitem {
background: url(../button/assets/checkbox.png) left center no-repeat;
}
</textarea>
<h2>Creating Menu Buttons With A Default Value</h2>
<p>
In HTML, it is possible to specify a default value for a
<code>&#60;select&#62;</code> element by applying the <code>selected</code>
attribute to one of the <code>&#60;select&#62;</code>'s
<code>&#60;option&#62;</code> elements. If a menu button is replacing an
existing <code>&#60;select&#62;</code> element, the default value will
automatically be interpreted from the <code>&#60;select&#62;</code>'s
<code>&#60;option&#62;</code> elements.
</p>
<p>
If a default value is desired for a menu button built completely from script,
it is necessary to specify the default value by setting the
<code>selectedMenuItem</code> attribute. The following code illustrates how
a default value was specified for the the fourth Button in this example.
</p>
<textarea name="code" class="JScript" cols="60" rows="1">
var aMenuButton4MenuData = [
{ text: "Option 1", value: "menubutton-4-1" },
{ text: "Option 2", value: "menubutton-4-2" },
{ text: "Option 3", value: "menubutton-4-3" }
];
var oMenuButton4 = new Button({
id: "menubutton-4",
name: "menubutton-4",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
lazyloadmenu: false,
menu: aMenuButton4MenuData,
container: "menubutton-4-container" });
var oMenuButton4Menu = oMenuButton4.getMenu();
// "render" event handler for a Button's Menu - responsible for setting
// the default value for the Button's "selectedMenuItem" attribute.
var onMenuRender = function (type, args, button) {
button.set("selectedMenuItem", this.getItem(0));
};
// If a Button's "selectedMenuItem" attribute is set, the selected
// MenuItem's name and value will be part of the form's data set
// when its parent form is submitted. For Buttons with Menus built
// entirely from script, the "selectedMenuItem" property is not set by
// default. To set the "selectedMenuItem" to a default value, simply
// register a "render" event handler for the Button's Menu that sets
// the Button's "selectedMenuItem" attribute to the desired item in
// the Menu.
oMenuButton4Menu.subscribe("render", onMenuRender, oMenuButton4);
</textarea>
<p>
For performance, a Button's Menu is lazy loaded by default &#151; the MenuItems
are initialized and the Menu's HTML is rendered to the page the first time the
Button is clicked. If the user <em>never</em> clicks on the Button, its Menu
will never be rendered, meaning the <code>render</code> event handler used to
set the default value of the <code>selectedMenuItem</code> attribute will never
be called. In such cases it is necessary to add a <code>submit</code> event
handler to the Button's parent form that will render the Menu if the Button's
<code>selectedMenuItem</code> attribute is not set. The following code
illustrates how a <code>submit</code> event handler is added to the parent
form of the third button in this example.
</p>
<textarea name="code" class="JScript" cols="60" rows="1">
// "render" event handler for a Button's Menu - responsible for setting
// the default value for the Button's "selectedMenuItem" attribute.
var onMenuRender = function (type, args, button) {
button.set("selectedMenuItem", this.getItem(0));
};
// "selectedMenuItemChange" event handler for a Button that will set
// the Button's "label" attribute to the value of the "text"
// configuration property of the MenuItem that was clicked.
var onSelectedMenuItemChange = function (event) {
var oMenuItem = event.newValue;
this.set("label", ("<em class=\"yui-button-label\">" +
oMenuItem.cfg.getProperty("text") + "</em>"));
};
// "submit" event handler for a Button's parent form - repsonsible for
// rendering a Menu that was to be lazy loaded, but never clicked on,
// and therefore never rendered.
var onFormSubmit = function (event, button) {
var oMenuItem = button.get("selectedMenuItem"),
UA = YAHOO.env.ua,
oEvent,
oMenu;
if (!oMenuItem) {
// Pause submission of the form until the Button's Menu
// is rendered
YAHOO.util.Event.preventDefault(event);
oMenu = button.getMenu();
oMenu.addItems(oMenu.itemData);
oMenu.subscribe("render", function () {
var bSubmitForm;
if (UA.ie) {
bSubmitForm = this.fireEvent("onsubmit");
}
else { // Gecko, Opera, and Safari
oEvent = document.createEvent("HTMLEvents");
oEvent.initEvent("submit", true, true);
bSubmitForm = this.dispatchEvent(oEvent);
}
// In IE and Safari, dispatching a "submit" event to a form
// WILL cause the form's "submit" event to fire, but WILL
// NOT submit the form. Therefore, we need to call the
// "submit" method as well.
if ((UA.ie || UA.webkit) && bSubmitForm) {
this.submit();
}
}, this, true);
oMenu.render(oMenu.cfg.getProperty("container"));
}
};
var aMenuButton3MenuData = [
{ text: "Option 1", value: "menubutton-3-1" },
{ text: "Option 2", value: "menubutton-3-2" },
{ text: "Option 3", value: "menubutton-3-3" }
];
var oMenuButton3 = new Button({
id: "menubutton-3",
name: "menubutton-3",
label: "<em class=\"yui-button-label\">Option 1</em>",
type: "menu",
menu: aMenuButton3MenuData,
container: "menubutton-3-container" });
// Register a "selectedMenuItemChange" event handler that will sync the
// Button's "label" attribute to the MenuItem that was clicked.
oMenuButton3.on("selectedMenuItemChange", onSelectedMenuItemChange);
oMenuButton3.on("appendTo", function () {
var oMenu = this.getMenu();
// If a Button's "selectedMenuItem" attribute is set, the selected
// MenuItem's name and value will be part of the form's data set
// when its parent form is submitted. For Buttons with Menus built
// entirely from script, the "selectedMenuItem" property is not
// set by default. To set the "selectedMenuItem" to a default
// value, simply register a "render" event handler for the Button's
// Menu that sets the Button's "selectedMenuItem" attribute to the
// desired item in the Menu.
oMenu.subscribe("render", onMenuRender, this);
// The items in a Button's Menu are lazy loaded by default: loaded
// when the Button is initially clicked. If the user never clicks
// on the Button, its Menu will never be rendered, meaning the
// "render" event handler registered above will never be called,
// and the default value for the Button's "selectMenuItem"
// attribute will never be set. Therefore, add a "submit" event
// handler to the Button's parent form that will render the Menu
// if the Button's "selectedMenuItem" attribute is not set.
YAHOO.util.Event.on(this.getForm(), "submit", onFormSubmit, this);
});
</textarea>
<h2>Configuration for This Example</h2>
<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?menu&button&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
</div>
<div class="yui-u">
<div id="loggerModule" class="yui-skin-sam">
<h3 class="firstContent">YUI Logger Output:</h3>
<div id="loggerGloss"><p><strong>Note:</strong> Logging and debugging is currently turned off for this example.</p>
<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="button-menu-select_log.html">Reload with logging<br />
and debugging enabled.</a></span></span></p></div>
</div>
<div id="examples">
<h3>Button Control Examples:</h3>
<div id="exampleToc">
<ul>
<li><a href='../button/btn_example01.html'>Push Buttons</a></li><li><a href='../button/btn_example02.html'>Link Buttons</a></li><li><a href='../button/btn_example03.html'>Checkbox Buttons</a></li><li><a href='../button/btn_example04.html'>Radio Buttons</a></li><li><a href='../button/btn_example05.html'>Submit Buttons</a></li><li><a href='../button/btn_example06.html'>Reset Buttons</a></li><li><a href='../button/btn_example07.html'>Menu Buttons</a></li><li><a href='../button/btn_example08.html'>Split Buttons</a></li><li><a href='../button/btn_example09.html'>Simple Calendar Menu Button</a></li><li><a href='../button/btn_example10.html'>Calendar Menu Button with Date on Button Face</a></li><li><a href='../button/btn_example11.html'>Color Picker Button</a></li><li><a href='../button/btn_example12.html'>Fixed Width Menu Button</a></li><li><a href='../button/btn_example13.html'>Glowing Button</a></li><li><a href='../button/btn_example14.html'>Slider Button</a></li><li><a href='../button/button-ariaplugin.html'>Using the Button ARIA Plugin</a></li><li class='selected'><a href='../button/button-menu-select.html'>Using A Menu Button To Replace A &#60;select&#62; Element</a></li><li><a href='../button/button-menu-swap.html'>Replacing the content of a Button's Menu</a></li><li><a href='../autocomplete/ac_combobox.html'>Combobox, with CSS for Multiple Stacked Instances (included with examples for AutoComplete Control)</a></li><li><a href='../datatable/dt_colshowhide.html'>Showing, Hiding, and Reordering Columns. (included with examples for DataTable Control)</a></li><li><a href='../get/get-css-basic.html'>Getting CSS Style Sheets (included with examples for Get Utility)</a></li><li><a href='../layout/adv_layout.html'>Complex Application (included with examples for Layout Manager)</a></li> </ul>
</div>
</div>
<div id="module">
<h3>More Button Control Resources:</h3>
<ul>
<li><a href="http://developer.yahoo.com/yui/button/">User's Guide</a> (external)</li>
<li><a href="../../docs/module_button.html">API Documentation</a></li>
<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/button.pdf">Cheat Sheet PDF</a> (external)</li></ul>
</div>
</div>
</div>
</div>
</div>
<div class="yui-b" id="tocWrapper">
<!-- TABLE OF CONTENTS -->
<div id="toc">
<ul>
<li class="sect first">Yahoo! UI Library</li><li class="item"><a title="The Yahoo! User Interface Library (YUI)" href="http://developer.yahoo.com/yui/">Home (external)</a></li><li class="item"><a title="The Yahoo! User Interface Blog" href="http://yuiblog.com">YUIBlog (external)</a></li><li class="item"><a title="YUILibrary.com hosts the YUI community forums" href="http://yuilibrary.com/forum/">YUI Discussion Forum (external)</a></li><li class="item"><a title="The YUI Library source can be checked out from GitHub" href="http://github.com/yui/">YUI on GitHub</a></li><li class="item"><a title="Instantly searchable API documentation for the entire YUI library." href="../../docs/index.html">API Documentation</a></li><li class="item"><a title="Examples of every YUI utility and control in action" href="../../examples/">Functional Examples</a></li><li class="item"><a title="Videos and podcasts from the YUI Team and from the Yahoo! frontend engineering community." href="http://developer.yahoo.com/yui/theater/">YUI Theater (external)</a></li><li class="item"><a title="YUI is free and open, offered under a BSD license." href="http://developer.yahoo.com/yui/license.html">YUI License (external)</a></li><li class="sect">YUI Functional Examples</li><li class="item"><a title="The YUI Animation Utility - Functional Examples" href="../../examples/animation/index.html">Animation</a></li><li class="item"><a title="The YUI AutoComplete Control - Functional Examples" href="../../examples/autocomplete/index.html">AutoComplete</a></li><li class="item"><a title="The YUI Browser History Manager - Functional Examples" href="../../examples/history/index.html">Browser History Manager</a></li><li class="selected "><a title="The YUI Button Control - Functional Examples" href="../../examples/button/index.html">Button</a></li><li class="item"><a title="The YUI Calendar Control - Functional Examples" href="../../examples/calendar/index.html">Calendar</a></li><li class="item"><a title="The YUI Carousel Control - Functional Examples" href="../../examples/carousel/index.html">Carousel</a></li><li class="item"><a title="The YUI Charts Control - Functional Examples" href="../../examples/charts/index.html">Charts</a></li><li class="item"><a title="The YUI Color Picker Control - Functional Examples" href="../../examples/colorpicker/index.html">Color Picker</a></li><li class="item"><a title="The YUI Cookie Utility - Functional Examples" href="../../examples/cookie/index.html">Cookie</a></li><li class="item"><a title="The YUI Connection Manager (AJAX) - Functional Examples" href="../../examples/connection/index.html">Connection Manager</a></li><li class="item"><a title="The YUI Container Family (Module, Overlay, Tooltip, Panel, Dialog, SimpleDialog) - Functional Examples" href="../../examples/container/index.html">Container</a></li><li class="item"><a title="The YUI DataTable Control - Functional Examples" href="../../examples/datatable/index.html">DataTable</a></li><li class="item"><a title="The YUI Dom Collection - Functional Examples" href="../../examples/dom/index.html">Dom</a></li><li class="item"><a title="The YUI Drag &amp; Drop Utility - Functional Examples" href="../../examples/dragdrop/index.html">Drag &amp; Drop</a></li><li class="item"><a title="The YUI Event Utility - Functional Examples" href="../../examples/event/index.html">Event</a></li><li class="item"><a title="The YUI Get Utility - Functional Examples" href="../../examples/get/index.html">Get</a></li><li class="item"><a title="The YUI ImageCropper Control - Functional Examples" href="../../examples/imagecropper/index.html">ImageCropper</a></li><li class="item"><a title="The YUI ImageLoader Utility - Functional Examples" href="../../examples/imageloader/index.html">ImageLoader</a></li><li class="item"><a title="The YUI JSON Utility - Functional Examples" href="../../examples/json/index.html">JSON</a></li><li class="item"><a title="The YUI Layout Manager - Functional Examples" href="../../examples/layout/index.html">Layout Manager</a></li><li class="item"><a title="The YUI Logger Control - Functional Examples" href="../../examples/logger/index.html">Logger</a></li><li class="item"><a title="The YUI Menu Control - Functional Examples" href="../../examples/menu/index.html">Menu</a></li><li class="item"><a title="The YUI Paginator - Functional Examples" href="../../examples/paginator/index.html">Paginator</a></li><li class="item"><a title="The YUI Profiler Utility - Functional Examples" href="../../examples/profiler/index.html">Profiler</a></li><li class="item"><a title="The YUI ProfileViewer Control - Functional Examples" href="../../examples/profilerviewer/index.html">ProfilerViewer</a></li><li class="item"><a title="The YUI ProgressBar Control - Functional Examples" href="../../examples/progressbar/index.html">ProgressBar</a></li><li class="item"><a title="The YUI Resize Utility - Functional Examples" href="../../examples/resize/index.html">Resize</a></li><li class="item"><a title="The YUI Rich Text Editor - Functional Examples" href="../../examples/editor/index.html">Rich Text Editor</a></li><li class="item"><a title="The YUI Selector Utility - Functional Examples" href="../../examples/selector/index.html">Selector</a></li><li class="item"><a title="The YUI Slider Control - Functional Examples" href="../../examples/slider/index.html">Slider</a></li><li class="item"><a title="The YUI Storage Utility - Functional Examples" href="../../examples/storage/index.html">Storage</a></li><li class="item"><a title="The YUI SWF Utility - Functional Examples" href="../../examples/swf/index.html">SWF</a></li><li class="item"><a title="The YUI SWFStore Utility - Functional Examples" href="../../examples/swfstore/index.html">SWFStore</a></li><li class="item"><a title="The YUI Stylesheet Utility - Functional Examples" href="../../examples/stylesheet/index.html">Stylesheet</a></li><li class="item"><a title="The YUI TabView Control - Functional Examples" href="../../examples/tabview/index.html">TabView</a></li><li class="item"><a title="The YUI TreeView Control - Functional Examples" href="../../examples/treeview/index.html">TreeView</a></li><li class="item"><a title="The YUI Uploader Utility - Functional Examples" href="../../examples/uploader/index.html">Uploader (experimental)</a></li><li class="item"><a title="The YUI YAHOO Global Object - Functional Examples" href="../../examples/yahoo/index.html">YAHOO Global Object</a></li><li class="item"><a title="The YUI Loader Utility - Functional Examples" href="../../examples/yuiloader/index.html">YUI Loader</a></li><li class="item"><a title="The YUI Test Utility - Functional Examples" href="../../examples/yuitest/index.html">YUI Test</a></li><li class="item"><a title="YUI Reset CSS - Functional Examples" href="../../examples/reset/index.html">Reset CSS</a></li><li class="item"><a title="YUI Base CSS - Functional Examples" href="../../examples/base/index.html">Base CSS</a></li><li class="item"><a title="YUI Fonts CSS - Functional Examples" href="../../examples/fonts/index.html">Fonts CSS</a></li><li class="item"><a title="YUI Grids CSS - Functional Examples" href="../../examples/grids/index.html">Grids CSS</a></li><li class="sect">YUI Articles on the YUI Website</li><li class="item"><a title="Answers to Frequently Asked Questions about the YUI Library" href="http://developer.yahoo.com/yui/articles/faq/">YUI FAQ (external)</a></li><li class="item"><a title="Yahoo!'s philosophy of Graded Browser Support" href="http://developer.yahoo.com/yui/articles/gbs/">Graded Browser Support (external)</a></li><li class="item"><a title="Reporting Bugs and Making Feature Requests for YUI Components" href="http://developer.yahoo.com/yui/articles/reportingbugs/">Bug Reports/Feature Requests (external)</a></li><li class="item"><a title="Serve YUI source files from Yahoo! -- free, fast, and simple" href="http://developer.yahoo.com/yui/articles/hosting/">Serving YUI Files from Yahoo! (external)</a></li><li class="item"><a title="Best practices for working with web services while protecting user privacy" href="http://developer.yahoo.com/security/">Security Best Practices (external)</a></li></ul>
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