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<title>YUI Library Examples: Button Control: Radio Buttons</title>
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<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>
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<div id="pagetitle"><h1>YUI Library Examples: Button Control: Radio Buttons</h1></div>
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<h1>Button Control: Radio Buttons</h1>
<div class="exampleIntro">
<p>This example demonstrates different ways to create a Button that functions like an HTML radio button (<code>&#60;input type="radio"/&#62;</code>).</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="btn_example04_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">
(function () {
var ButtonGroup = YAHOO.widget.ButtonGroup;
// "checkedButtonChange" event handler for each ButtonGroup instance
var onCheckedButtonChange = function (p_oEvent) {
if(p_oEvent.prevValue) {
YAHOO.log(p_oEvent.prevValue.get("name"), "info", "example4");
}
if(p_oEvent.newValue) {
YAHOO.log(p_oEvent.newValue.get("name"), "info", "example4");
}
};
// "contentready" event handler for the "radiobuttonsfrommarkup" <fieldset>
YAHOO.util.Event.onContentReady("radiobuttonsfrommarkup", function () {
var oButtonGroup1 = new ButtonGroup("buttongroup1");
oButtonGroup1.on("checkedButtonChange", onCheckedButtonChange);
var oButtonGroup2 = new ButtonGroup("buttongroup2");
oButtonGroup2.on("checkedButtonChange", onCheckedButtonChange);
});
// Create a ButtonGroup without using existing markup
var oButtonGroup3 = new ButtonGroup({ id: "buttongroup3", name: "radiofield3", container: "radiobuttonsfromjavascript", usearia: true });
oButtonGroup3.addButtons([
{ label: "Radio 9", value: "Radio 9", checked: true },
{ label: "Radio 10", value: "Radio 10" },
{ label: "Radio 11", value: "Radio 11" },
{ label: "Radio 12", value: "Radio 12" }
]);
oButtonGroup3.on("checkedButtonChange", onCheckedButtonChange);
}());
</script>
<form id="button-example-form" name="button-example-form" method="post">
<fieldset id="radiobuttons">
<legend>Radio Buttons</legend>
<fieldset id="radiobuttonsfrommarkup">
<legend>From Markup</legend>
<div id="buttongroup1" class="yui-buttongroup">
<input id="radio1" type="radio" name="radiofield1" value="Radio 1" checked>
<input id="radio2" type="radio" name="radiofield1" value="Radio 2">
<input id="radio3" type="radio" name="radiofield1" value="Radio 3">
<input id="radio4" type="radio" name="radiofield1" value="Radio 4">
</div>
<div id="buttongroup2" class="yui-buttongroup">
<span id="radio5" class="yui-button yui-radio-button yui-button-checked"><span class="first-child"><button type="button" name="radiofield2" value="Radio 5">Radio 5</button></span></span>
<span id="radio6" class="yui-button yui-radio-button"><span class="first-child"><button type="button" name="radiofield2" value="Radio 6">Radio 6</button></span></span>
<span id="radio7" class="yui-button yui-radio-button"><span class="first-child"><button type="button" name="radiofield2" value="Radio 7">Radio 7</button></span></span>
<span id="radio8" class="yui-button yui-radio-button"><span class="first-child"><button type="button" name="radiofield2" value="Radio 8">Radio 8</button></span></span>
</div>
</fieldset>
<fieldset id="radiobuttonsfromjavascript">
<legend>From JavaScript</legend>
</fieldset>
</fieldset>
<div>
<input type="reset" name="resetbutton" value="Reset Form">
<input type="submit" name="submitbutton" value="Submit Form">
</div>
</form>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Creating Radio Buttons</h2>
<p>The ButtonGroup class creates a set of Buttons that are mutually exclusive; checking one button in the group will uncheck all others in the group. The ButtonGroup class is defined by <code>YAHOO.widget.ButtonGroup</code> and a ButtonGroup's root HTML element is a <code>&#60;div/&#62;</code>.</p>
<p>A ButtonGroup can be instantiated three different ways:</p>
<ul>
<li><a href="#buildingfromdatasource">Using an existing set of <code>&#60;input type="radio"/&#62;</code> elements</a></li>
<li><a href="#buildingfromtemplate">Using an existing set of Buttons defined using Button Control HTML</a></li>
<li><a href="#buildingfromjavascript">Using no existing HTML</a></li>
</ul>
<h3>Using an existing set of <code>&#60;input type="radio"/&#62;</code> elements</h3>
<p>A ButtonGroup can be created from a set of existing <code>&#60;input type="radio"/&#62;</code> elements:</p>
<textarea name="code" class="HTML" cols="60" rows="1">
<div id="buttongroup1" class="yui-buttongroup">
<input id="radio1" type="radio" name="radiofield1" value="Radio 1" checked>
<input id="radio2" type="radio" name="radiofield1" value="Radio 2">
<input id="radio3" type="radio" name="radiofield1" value="Radio 3">
<input id="radio4" type="radio" name="radiofield1" value="Radio 4">
</div>
</textarea>
<p>To instantiate a ButtonGroup from existing HTML, pass the id of the ButtonGroup's <code>&#60;div/&#62;</code> element as the first argument to the ButtonGroup constructor and any additional <a href="http://developer.yahoo.com/yui/button/#buttongroupconfigreference">configuration attributes</a> as the second argument via an object literal. The ButtonGroup will automatically search its child nodes for HTML radio buttons (<code>&#60;input type="radio"/&#62;</code>) and use those elements to create instances of YAHOO.widget.Button of type "radio."</p>
<textarea name="code" class="JScript" cols="60" rows="1">
var oButtonGroup1 = new YAHOO.widget.ButtonGroup("buttongroup1")
</textarea>
<h3 id="buildingfromtemplate">Using an existing set of Buttons defined using Button Control HTML</h4>
<p>Alternatively, each Button in a ButtonGroup can be defined using the YUI Button HTML: An element with a class of "yui-button" and "yui-radio-button" containing a element with a class of "first-child" containing a <code>&#60;button/&#62;</code> element.</p>
<textarea name="code" class="HTML" cols="60" rows="1">
<div id="buttongroup2" class="yui-buttongroup">
<span id="radio5" class="yui-button yui-radio-button yui-button-checked">
<span class="first-child">
<button type="button" name="radiofield2" value="Radio 5">
Radio 5
</button>
</span>
</span>
<span id="radio6" class="yui-button yui-radio-button">
<span class="first-child">
<button type="button" name="radiofield2" value="Radio 6">
Radio 6
</button>
</span>
</span>
<span id="radio7" class="yui-button yui-radio-button">
<span class="first-child">
<button type="button" name="radiofield2" value="Radio 7">
Radio 7
</button>
</span>
</span>
<span id="radio8" class="yui-button yui-radio-button">
<span class="first-child">
<button type="button" name="radiofield2" value="Radio 8">
Radio 8
</button>
</span>
</span>
</div>
</textarea>
<p>To instantiate a ButtonGroup using the Button Control HTML, pass the id of the ButtonGroup's root element (the element with the classes "yui-buttongroup" and "yui-radio-button" applied) as the first argument to constructor and any additional <a href="http://developer.yahoo.com/yui/button/#buttonconfigreference">configuration attributes</a> as the second argument via an object literal.</p>
<textarea name="code" class="JScript" cols="60" rows="1">
var oButtonGroup2 = new YAHOO.widget.ButtonGroup("buttongroup2");
</textarea>
<h3 id="buildingfromjavascript">Using no existing HTML</h3>
<p>To build a ButtonGroup with no existing HTML, pass a set of <a href="http://developer.yahoo.com/yui/button/#buttongroupconfigreference">configuration attributes</a> as a single argument to the ButtonGroup constructor using an object literal. Add buttons to the ButtonGroup via the <code>addButton</code> or <code>addButtons</code> methods.</p>
<textarea name="code" class="JScript" cols="60" rows="1">
var oButtonGroup3 = new YAHOO.widget.ButtonGroup({
id: "buttongroup3",
name: "radiofield3",
container: "radiobuttonsfromjavascript" });
oButtonGroup3.addButtons([
{ label: "Radio 9", value: "Radio 9", checked: true },
{ label: "Radio 10", value: "Radio 10" },
{ label: "Radio 11", value: "Radio 11" },
{ label: "Radio 12", value: "Radio 12" }
]);
</textarea>
<p>In most cases, it is necessary to specify the ButtonGroup's id and container (the HTML element that the ButtonGroup should be appended to once created). If an id is not specified for the ButtonGroup, one will be generated using the <code><a href="/yui/docs/YAHOO.util.Dom.html#generateId">generateId</a></code> method of the <a href="/yui/docs/module_dom.html">Dom utility</a>.</p>
<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/?button&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
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<p><strong>Note:</strong> You are viewing this example in debug mode with logging enabled. This can significantly slow performance.</p>
<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="btn_example04.html">Reload with logging<br />and debugging disabled.</a></span></span></p>
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</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 class='selected'><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><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>
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