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2008-03-25 16:13:25 +00:00

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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: Slider Control: Dual-thumb Slider with range highlight</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);}
#pagetitle h1 {background-image: url(../../assets/title_h_bg.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/button/assets/skins/sam/button.css" />
<script type="text/javascript" src="../../build/yahoo/yahoo-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/dragdrop/dragdrop-min.js"></script>
<script type="text/javascript" src="../../build/slider/slider-min.js"></script>
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<script type="text/javascript" src="../../build/button/button-min.js"></script>
<!--begin custom header content for this example-->
<style type="text/css">
#demo_bg {
position: relative;
background: url(../slider/assets/dual_thumb_bg.gif) 0 5px no-repeat;
height: 28px;
width: 310px;
}
#demo_bg div {
position: absolute;
cursor: default;
top: 4px;
}
#demo_bg span {
position: absolute;
background: url(../slider/assets/dual_thumb_highlight.gif) 0 0 repeat-x;
top: 10px;
left: 12px;
height: 13px;
width: 288px;
}
#demo_bg .caution {
background-position: 0 -13px;
}
#demo_bg .boom,
#demo_bg .danger {
background-position: 0 -26px;
}
p .ok {
color: #3a3;
font-weight: bold;
text-transform: uppercase;
}
p .caution {
background: #ff3;
color: #770;
font-weight: bold;
font-style: italic;
padding: 0 1ex;
text-transform: uppercase;
}
p .danger {
color: #f33;
font-weight: bold;
text-decoration: blink;
text-transform: uppercase;
}
p .boom {
color: #fff;
background: #000;
padding: 0 1ex;
}
</style>
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</head>
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<p><em>
<a href="http://developer.yahoo.com">Yahoo! Developer Network Home</a> <i> - </i>
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<input type="submit" value="Search" class="ygbt"></form>
</div>
<div id="ygma"><a href="../../"><img src="../../assets/yui.gif" border="0" width="378" height="28"></a></div>
<div id="pagetitle"><h1>YUI Library Examples: Slider Control: Dual-thumb Slider with range highlight</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>Slider Control: Dual-thumb Slider with range highlight</h1>
<div class="exampleIntro">
<p>This example demonstrates a horizontal dual-thumb Slider with custom code to add a highlight to the bounded range. Some characteristics to note include the following:</p>
<ul>
<li>The thumbs are set on a slide bar with a 300 pixel range.</li>
<li>The thumbs are configured with a 12 pixel tick size.</li>
<li>Clicking on the background will animate the nearest thumb.</li>
</ul>
</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="slider_dual_with_highlight_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<div id="demo_bg" title="Range slider">
<span id="demo_highlight"></span>
<div id="demo_min_thumb"><img src="assets/l-thumb-round.gif"></div>
<div id="demo_max_thumb"><img src="assets/r-thumb-round.gif"></div>
</div>
<p>Range offsets: <span id="demo_range">0 - 300</span></p>
<p>Status: <span id="demo_value" class="ok">ok</span></p>
<script type="text/javascript">
(function () {
YAHOO.namespace('example');
var Dom = YAHOO.util.Dom;
// Slider has a range of 300 pixels
var range = 300;
// Set up 12 pixel ticks
var tickSize = 12;
// Some arbitrary ranges to cue status changes
var caution_range = 150,
danger_range = 75,
boom_range = 13;
YAHOO.util.Event.onDOMReady(function () {
var reportSpan = Dom.get("demo_range");
var calculatedSpan = Dom.get("demo_value");
// Create the DualSlider
var slider = YAHOO.widget.Slider.getHorizDualSlider("demo_bg",
"demo_min_thumb", "demo_max_thumb",
range, tickSize);
// Decorate the DualSlider instance with some new properties and
// methods to maintain the highlight element
YAHOO.lang.augmentObject(slider, {
_status : 'ok',
_highlight : Dom.get("demo_highlight"),
getStatus : function () { return this._status; },
updateHighlight : function () {
var delta = this.maxVal - this.minVal,
newStatus = 'ok';
if (delta < boom_range) {
newStatus = 'boom';
} else if (delta < danger_range) {
newStatus = 'danger';
} else if (delta < caution_range) {
newStatus = 'caution';
}
if (this._status !== newStatus) {
// Update the highlight class if status is changed
Dom.replaceClass(this._highlight,this._status,newStatus);
this._status = newStatus;
}
if (this.activeSlider === this.minSlider) {
// If the min thumb moved, move the highlight's left edge
Dom.setStyle(this._highlight,'left', (this.minVal + 12) + 'px');
}
// Adjust the width of the highlight to match inner boundary
Dom.setStyle(this._highlight,'width', Math.max(delta - 12,0) + 'px');
}
},true);
// Attach the highlight method to the slider's change event
slider.subscribe('change',slider.updateHighlight,slider,true);
// Create an event callback to update some display fields
var report = function () {
reportSpan.innerHTML = slider.minVal + ' - ' + slider.maxVal;
// Call our conversion function
calculatedSpan.innerHTML =
calculatedSpan.className = slider.getStatus();
};
// Subscribe to the slider's change event to report the status.
slider.subscribe('change',report);
// Attach the slider to the YAHOO.example namespace for public probing
YAHOO.example.slider = slider;
});
})();
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Adding a range highlight to a dual thumb Slider</h2>
<p>DualSlider does not come prebuilt with support for a range highlight. This example demonstrates how to add this functionality to a DualSlider.</p>
<p>You supply your own markup for the slider. Keep in mind the following points about markup for <a href="http://developer.yahoo.com/yui/slider/#dual">YUI Dual Thumb Slider Control</a> implementations:</p>
<ul>
<li>The thumb elements should be children of the slider background.</li>
<li>We use <code>&lt;img&gt;</code> elements rather than a CSS background for the thumbs to get around a performance bottleneck when animating thumb positions in IE.</li>
<li>Don't apply a CSS border to the slider background.</li>
<li>The background element should have an explicit CSS position: <code>relative</code> or <code>absolute</code>.</li>
<li>Both thumb elements should have an explicit CSS position: <code>absolute</code> and be initially placed at the zero position of the background. Set their initial position in the constructor if desired.</li>
</ul>
<h2>CSS:</h2>
<p>The example will use the css sprites technique to change the color of the highlight based on assigned classes.</p>
<textarea name="code" class="CSS" cols="60" rows="1">
#demo_bg {
position: relative;
background: url(../slider/assets/dual_thumb_bg.gif) 0 5px no-repeat;
height: 28px;
width: 310px;
}
#demo_bg div {
position: absolute;
cursor: default;
top: 4px;
}
/* Here's the highlight element */
#demo_bg span {
position: absolute;
background: url(../slider/assets/dual_thumb_highlight.gif) 0 0 repeat-x;
top: 10px;
left: 12px;
height: 13px;
width: 288px;
}
#demo_bg .caution {
background-position: 0 -13px;
}
#demo_bg .boom,
#demo_bg .danger {
background-position: 0 -26px;
}
/* We'll use the same class names for the status report region */
p .ok {
color: #3a3;
font-weight: bold;
text-transform: uppercase;
}
p .caution {
background: #ff3;
color: #770;
font-weight: bold;
font-style: italic;
padding: 0 1ex;
text-transform: uppercase;
}
p .danger {
color: #f33;
font-weight: bold;
text-decoration: blink;
text-transform: uppercase;
}
p .boom {
color: #fff;
background: #000;
padding: 0 1ex;
}
</textarea>
<h2>Markup:</h2>
<p>Here we add an additional <code>span</code> element to use as our highlight.</p>
<textarea name="code" class="HTML" cols="60" rows="1">
<div id="demo_bg" title="Range slider">
<span id="demo_highlight"></span>
<div id="demo_min_thumb"><img src="assets/l-thumb-round.gif"></div>
<div id="demo_max_thumb"><img src="assets/r-thumb-round.gif"></div>
</div>
<p>Thumb values: <span id="demo_range"></span></p>
<p>Status: <span id="demo_value"></span></p>
</textarea>
<h2>Code:</h2>
<textarea name="code" class="JScript" cols="60" rows="1">
(function () {
YAHOO.namespace('example');
var Dom = YAHOO.util.Dom;
// Slider has a range of 300 pixels
var range = 300;
// Set up 12 pixel ticks
var tickSize = 12;
// Some arbitrary ranges to cue status changes
var caution_range = 150,
danger_range = 75,
boom_range = 13;
YAHOO.util.Event.onDOMReady(function () {
var reportSpan = Dom.get("demo_range");
var calculatedSpan = Dom.get("demo_value");
// Create the DualSlider
var slider = YAHOO.widget.Slider.getHorizDualSlider("demo_bg",
"demo_min_thumb", "demo_max_thumb",
range, tickSize);
// Decorate the DualSlider instance with some new properties and
// methods to maintain the highlight element
YAHOO.lang.augmentObject(slider, {
// The current status
_status : 'ok',
// The highlight element
_highlight : Dom.get("demo_highlight"),
// A simple getter method for the status
getStatus : function () { return this._status; },
// A method to update the status and update the highlight
updateHighlight : function () {
var delta = this.maxVal - this.minVal,
newStatus = 'ok';
if (delta < boom_range) {
newStatus = 'boom';
} else if (delta < danger_range) {
newStatus = 'danger';
} else if (delta < caution_range) {
newStatus = 'caution';
}
if (this._status !== newStatus) {
// Update the highlight class if status is changed
Dom.replaceClass(this._highlight,this._status,newStatus);
this._status = newStatus;
}
if (this.activeSlider === this.minSlider) {
// If the min thumb moved, move the highlight's left edge
Dom.setStyle(this._highlight,'left', (this.minVal + 12) + 'px');
}
// Adjust the width of the highlight to match inner boundary
Dom.setStyle(this._highlight,'width', Math.max(delta - 12,0) + 'px');
}
},true);
// Attach the highlight method to the slider's change event
slider.subscribe('change',slider.updateHighlight,slider,true);
// Create an event callback to update some display fields
var report = function () {
reportSpan.innerHTML = slider.minVal + ' - ' + slider.maxVal;
// Call our conversion function
calculatedSpan.innerHTML =
calculatedSpan.className = slider.getStatus();
};
// Subscribe to the slider's change event to report the status.
slider.subscribe('change',report);
// Attach the slider to the YAHOO.example namespace for public probing
YAHOO.example.slider = slider;
});
})();
</textarea>
</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="slider_dual_with_highlight_log.html">Reload with logging<br />
and debugging enabled.</a></span></span></p></div>
</div>
<div id="examples">
<h3>Slider Control Examples:</h3>
<div id="exampleToc">
<ul>
<li><a href='../slider/slider-simple.html'>Basic Vertical Slider</a></li><li><a href='../slider/slider-ticks.html'>Horizontal Slider with Tick Marks</a></li><li><a href='../slider/slider-rgb.html'>RBG Slider Control</a></li><li><a href='../slider/slider_vert_swapped.html'>Bottom to top Vertical Slider</a></li><li><a href='../slider/slider_dual_thumb.html'>Horizontal Slider with two thumbs</a></li><li class='selected'><a href='../slider/slider_dual_with_highlight.html'>Dual-thumb Slider with range highlight</a></li><li><a href='../button/btn_example14.html'>Slider Button (included with examples for Button Control)</a></li><li><a href='../layout/adv_layout.html'>Complex Application (included with examples for Layout Manager (beta))</a></li> </ul>
</div>
</div>
<div id="module">
<h3>More Slider Control Resources:</h3>
<ul>
<li><a href="http://developer.yahoo.com/yui/slider/">User's Guide</a> (external)</li>
<li><a href="../../docs/module_slider.html">API Documentation</a></li>
<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/slider.pdf">Cheat Sheet PDF</a> (external)</li></ul>
</div>
</div>
</div>
</div>
</div>
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