src/cm/media/js/lib/yui/yui_3.0.0b1/examples/node-focusmanager/node-focusmanager-1.html
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<title>YUI Library Examples: Focus Manager Node Plugin: Accessible Toolbar</title>
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.yui-toolbar {
border: solid 1px #999;
background-color: #ccc;
margin: .25em;
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.yui-toolbar-button {
display: inline-block;
border-width: 1px 0;
border-style: solid;
border-color: #808080;
margin: .25em;
font-size: 85%; /* 11px */
}
.yui-toolbar-button span {
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border-color: #808080;
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}
#add-btn input {
background-position: 4px -102px;
}
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background-position: 4px -78px;
}
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background-position: 4px -54px;
}
#open-btn input {
background-position: 4px -30px;
}
#delete-btn input {
background-position: 4px -126px;
}
#save-btn input {
background-position: 4px -6px;
}
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background color of the button when it is focused. */
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background-color: #B3D4FF;
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<div id="pagetitle"><h1>YUI Library Examples: Focus Manager Node Plugin: Accessible Toolbar</h1></div>
</div>
<div id="bd">
<div id="bar-note"><p><strong>Note:</strong> This is YUI 3.x. Looking for <a href="http://developer.yahoo.com/yui/">YUI 2.x</a>?</p></div>
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<div class="yui-ge">
<div class="yui-u first example" id="main">
<h2>Focus Manager Node Plugin: Accessible Toolbar</h2>
<div id="example" class="promo">
<p>
<p>
This example illustrates how to create an accessible toolbar using the
Focus Manager Node Plugin and Node's support for the
<a href="http://www.w3.org/TR/wai-aria/">WAI-ARIA Roles and States</a>.
</p> </p>
<div class="module example-container ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam">
<a href="node-focusmanager-1_clean.html" target="_blank">View example in new window.</a>
</p>
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<div id="toolbar-1" class="yui-toolbar">
<span id="add-btn" class="yui-toolbar-button"><span><input type="button" name="btn-add" value="Add"></span></span>
<span id="edit-btn" class="yui-toolbar-button"><span><input type="button" name="btn-edit" value="Edit"></span></span>
<span id="print-btn" class="yui-toolbar-button"><span><input type="button" name="btn-print" value="Print"></span></span>
<span id="delete-btn" class="yui-toolbar-button"><span><input type="button" name="btn-delete" value="Delete"></span></span>
<span id="open-btn" class="yui-toolbar-button"><span><input type="button" name="btn-open" value="Open"></span></span>
<span id="save-btn" class="yui-toolbar-button"><span><input type="button" name="btn-save" value="Save"></span></span>
</div>
<!-- YUI Seed -->
<script type="text/javascript" src="../../build/yui/yui.js"></script>
<script type="text/javascript">
YUI({base:"../../build/", timeout: 10000}).use("node-focusmanager", function(Y) {
// Retrieve the Node instance representing the toolbar
// (<div id="toolbar">) and call the "plug" method
// passing in a reference to the Focus Manager Node Plugin.
var toolbar = Y.Node.get("#toolbar-1");
toolbar.plug(Y.Plugin.NodeFocusManager, {
descendants: "input",
keys: { next: "down:39", // Right arrow
previous: "down:37" }, // Left arrow
focusClass: "focus",
circular: true
});
// Set the ARIA "role" attribute of the Node instance representing the
// toolbar to "toolbar" to improve the semantics of the markup for
// users of screen readers.
toolbar.set("role", "toolbar");
// Listen for the click event on each button via the use of the
// "delegate" Custom Event.
Y.on("delegate", function (event) {
alert("You clicked " + event.currentTarget.query("input").get("value"));
}, toolbar, "click", ".yui-toolbar-button");
});
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h3>Setting Up the HTML</h3>
<p>
Start with a set of <code><input></code> elements. For the
purpose of this example, the <code>type</code> attribute of each
button will be set to a value of "button" since they won't be responsible for
submitting a form. Each <code><input></code> is wrapped by two
<code><span></code>s that serve as decorator elements used to style
each button with rounded corners.
</p>
<textarea name="code" class="HTML" cols="60" rows="1">
<div id="toolbar-1" class="yui-toolbar">
<span id="add-btn" class="yui-toolbar-button"><span><input type="button" name="btn-add" value="Add"></span></span>
<span id="edit-btn" class="yui-toolbar-button"><span><input type="button" name="btn-edit" value="Edit"></span></span>
<span id="print-btn" class="yui-toolbar-button"><span><input type="button" name="btn-print" value="Print"></span></span>
<span id="delete-btn" class="yui-toolbar-button"><span><input type="button" name="btn-delete" value="Delete"></span></span>
<span id="open-btn" class="yui-toolbar-button"><span><input type="button" name="btn-open" value="Open"></span></span>
<span id="save-btn" class="yui-toolbar-button"><span><input type="button" name="btn-save" value="Save"></span></span>
</div>
</textarea>
<h3>Setting Up the CSS</h3>
<p>
Next, each button in the toolbar is styled with rounded corners using a
combination of the CSS <code>border</code> property along with the use of
negative margins. An icon is added to each button using a background image.
Following the advice of the
<a href="http://developer.yahoo.com/performance/rules.html">Exceptional Performance team</a>,
this example uses the technique of
<a href="http://www.alistapart.com/articles/sprites">CSS Sprites</a>,
combining all of the icons for each button into a single image to reduce
HTTP requests.
</p>
<textarea name="code" class="CSS" cols="60" rows="1">
.yui-toolbar {
border: solid 1px #999;
background-color: #ccc;
margin: .25em;
overflow: auto;
}
.yui-toolbar-button {
display: inline-block;
border-width: 1px 0;
border-style: solid;
border-color: #808080;
margin: .25em;
font-size: 85%; /* 11px */
}
.yui-toolbar-button span {
display: inline-block;
border-width: 0 1px;
border-style: solid;
border-color: #808080;
margin: 0 -1px;
*position: relative; /* Necessary to get negative margins working in IE */
*left: -1px;
}
.yui-toolbar-button input {
border: none;
margin: 0;
padding: 4px 4px 4px 24px;
*overflow: visible; /* Remove superfluous padding for IE */
background: transparent url(assets/icons.png) 4px -6px no-repeat;
}
#add-btn input {
background-position: 4px -102px;
}
#edit-btn input {
background-position: 4px -78px;
}
#print-btn input {
background-position: 4px -54px;
}
#open-btn input {
background-position: 4px -30px;
}
#delete-btn input {
background-position: 4px -126px;
}
#save-btn input {
background-position: 4px -6px;
}
</textarea>
<h3>Initializing the Focus Manager</h3>
<p>
With the toolbar markup and CSS in place, retrieve the Node instance
representing the toolbar (<code><div id="toolbar-1"></code>)
and call the <a href="../../api/Node.html#method_plug"><code>plug</code></a>
passing in a reference to the Focus Manager Node Plugin as the first argument,
and a collection of configuration attributes as the second argument.
</p>
<p>
The Focus Manager's
<a href="../../api/plugin.NodeFocusManager.html#config_descendants"><code>descendants</code></a>
attribute is set to a value of "input", so that only one button in the toolbar
is in the browser's default tab flow. This allows users navigating via the
keyboard to use the tab key to quickly move into and out of the toolbar. Once
the toolbar has focus, the user can move focus among each button using the left
and right arrows keys, as defined by the value of the
<a href="../../api/plugin.NodeFocusManager.html#config_keys"><code>keys</code></a>
attribute. Lastly, the
<a href="../../api/plugin.NodeFocusManager.html#config_focusClass"><code>focusClass</code></a>
attribute is used to apply a class of <code>focus</code> to each
<code><input></code> when it is focused, making it easy to style the
focused state in each of the
<a href="http://developer.yahoo.com/yui/articles/gbs/#gbschart">A-Grade browsers</a>.
</p>
<textarea name="code" class="JScript" cols="60" rows="1">
YUI({base:"../../build/", timeout: 10000}).use("node-focusmanager", function(Y) {
// Retrieve the Node instance representing the toolbar
// (<div id="toolbar">) and call the "plug" method
// passing in a reference to the Focus Manager Node Plugin.
var toolbar = Y.Node.get("#toolbar-1");
toolbar.plug(Y.Plugin.NodeFocusManager, {
descendants: "input", // The descendant Nodes to manage
keys: { next: "down:39", // Right arrow
previous: "down:37" }, // Left arrow
focusClass: "focus", // Class to be applied to the currently focused <input>
circular: true // Go back to the first/last Node when the beginning or end is reached
});
// Set the ARIA "role" attribute of the Node instance representing the
// toolbar to "toolbar" to improve the semantics of the markup for
// users of screen readers.
toolbar.set("role", "toolbar");
// Listen for the click event on each button via the use of the
// "delegate" Custom Event.
Y.on("delegate", function (event) {
alert("You clicked " + event.currentTarget.query("input").get("value"));
}, toolbar, "click", ".yui-toolbar-button");
});
</textarea>
<h3>Styling Focus</h3>
<p>
To augment the browser's default styling of the focused state define a CSS
selector that adds a background color to the
</p>
<textarea name="code" class="CSS" cols="60" rows="1">
/* Augment the browser's default styling of the focus state by changing the
background color of the button when it is focused. */
.yui-toolbar-button input.focus {
background-color: #B3D4FF;
}
</textarea>
</div>
<div class="yui-u sidebar">
<div id="examples" class="mod box4">
<div class="hd">
<h4>
Focus Manager Node Plugin Examples:</h4>
</div>
<div class="bd">
<ul>
<li class='selected'><a href='../node-focusmanager/node-focusmanager-1.html'>Accessible Toolbar</a></li><li><a href='../node-focusmanager/node-focusmanager-2.html'>Accessible TabView</a></li><li><a href='../node-focusmanager/node-focusmanager-3.html'>Accessible Menu Button</a></li> </ul>
</div>
</div>
<div class="mod box4">
<div class="hd">
<h4>More Focus Manager Node Plugin Resources:</h4>
</div>
<div class="bd">
<ul>
<!-- <li><a href="http://developer.yahoo.com/yui/node-focusmanager/">User's Guide</a> (external)</li> -->
<li><a href="../../api/module_node-focusmanager.html">API Documentation</a></li>
</ul>
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