121 lines
No EOL
4 KiB
HTML
121 lines
No EOL
4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<title>Bottom to top Vertical Slider</title>
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<style type="text/css">
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/*margin and padding on body element
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can introduce errors in determining
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element position and are not recommended;
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we turn them off as a foundation for YUI
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CSS treatments. */
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body {
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margin:0;
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padding:0;
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}
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</style>
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<link rel="stylesheet" type="text/css" href="../../build/fonts/fonts-min.css" />
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<script type="text/javascript" src="../../build/yahoo-dom-event/yahoo-dom-event.js"></script>
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<script type="text/javascript" src="../../build/animation/animation-min.js"></script>
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<script type="text/javascript" src="../../build/dragdrop/dragdrop-min.js"></script>
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<script type="text/javascript" src="../../build/slider/slider-min.js"></script>
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<!--begin custom header content for this example-->
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<style type="text/css">
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#slide_bg {
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position: relative;
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background: url(../slider/assets/bg-v.gif) 12px 0 no-repeat;
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height: 228px;
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width: 48px;
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}
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#slide_thumb {
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cursor: default;
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position: absolute;
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top: 200px;
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}
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</style>
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<!--end custom header content for this example-->
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</head>
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<body class=" yui-skin-sam">
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<h1>Bottom to top Vertical Slider</h1>
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<div class="exampleIntro">
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<p>This example demonstrates a vertical implementation of the <a href="http://developer.yahoo.com/yui/slider/">YUI Slider Control</a>. Some characteristics of this implementation include the following:</p>
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<ul>
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<li>The slider range is 200 pixels.</li>
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<li>CSS is used to place the slide thumb at the bottom of the slider.</li>
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<li>Custom logic is added to the slider instance to convert the offset value to a "real" value calculated from a provided min/max range.</li>
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<li>The custom min value is set to 10; the max 110.</li>
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<li>Once the slider has focus, the up and down keys will move
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the thumb 20 pixels (changing the "real" value by 10).</li>
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<li>When the slider value changes, the pixel offset and calculated value are reported below the slider.</li>
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</ul>
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</div>
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<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
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<div id="demo">
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<div id="slide_bg" tabindex="-1">
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<div id="slide_thumb"><img src="assets/thumb-bar.gif"></div>
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</div>
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<p>Pixel offset from start: <span id="d_offset">0</span></p>
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<p>Calculated Value: <span id="d_val">0</span></p>
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</div>
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<script type="text/javascript">
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YAHOO.util.Event.onDOMReady(function () {
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// the slider can move up 200 pixels
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var upLimit = 200;
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// and down 0 pixels
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var downLimit = 0;
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// Create the Slider instance
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var slider = YAHOO.widget.Slider.getVertSlider(
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'slide_bg', 'slide_thumb', upLimit, downLimit);
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// Add a little functionality to the instance
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YAHOO.lang.augmentObject(slider, {
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// A custom value range for the slider
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minValue : 10,
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maxValue : 110,
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// A method to retrieve the calculated value, per the value range
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getCalculatedValue : function () {
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// invert the offset value so "real" values increase as the
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// slider moves up
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var offset = -1 * this.getValue();
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// Convert the offset to a value in our configured range
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var conversionFactor =
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(this.maxValue - this.minValue) /
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(this.thumb.topConstraint + this.thumb.bottomConstraint);
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return Math.round(offset * conversionFactor) + this.minValue;
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}
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});
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// display the native offset and the calculated while sliding
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var offset_span = YAHOO.util.Dom.get('d_offset');
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var calc_span = YAHOO.util.Dom.get('d_val');
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slider.subscribe('change', function (offsetFromStart) {
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offset_span.innerHTML = offsetFromStart;
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calc_span.innerHTML = this.getCalculatedValue();
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});
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});
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</script>
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<!--END SOURCE CODE FOR EXAMPLE =============================== -->
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</body>
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</html> |