Combine a Split Button with a Slider to create an opacity slider button, similar to Adobe Photoshop
<!--
Software License Agreement (BSD License)
Copyright (c) 2009, Yahoo! Inc.
All rights reserved.
Redistribution and use of this software in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
* Neither the name of Yahoo! Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission of Yahoo! Inc.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Sources of Intellectual Property Included in the YUI Library
YUI is issued by Yahoo! under the BSD license above. Below is a list of certain publicly available software that is the source of intellectual property in YUI, along with the licensing terms that pertain to thosesources of IP. This list is for informational purposes only and is not intended to represent an exhaustive list of third party contributions to the YUI.
* Douglas Crockford's JSON parsing and stringifying methods: In the JSON Utility, Douglas Crockford's JSON parsing and stringifying methods are adapted from work published at JSON.org. The adapted work is in the public domain.
* Robert Penner's animation-easing algorithms: In the Animation Utility, YUI makes use of Robert Penner's algorithms for easing.
* Geoff Stearns's SWFObject: In the Charts Control and the Uploader versions through 2.7.0, YUI makes use of Geoff Stearns's SWFObject v1.5 for Flash Player detection and embedding. More information on SWFObject can be found here (http://blog.deconcept.com/swfobject/). SWFObject is (c) 2007 Geoff Stearns and is released under the MIT License (http://www.opensource.org/licenses/mit-license.php).
* Diego Perini's IEContentLoaded technique: The Event Utility employs a technique developed by Diego Perini and licensed under GPL. YUI's use of this technique is included under our BSD license with the author's permission.
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Slider Button</title>
<style type="text/css">
/*margin and padding on body element
can introduce errors in determining
element position and are not recommended;
we turn them off as a foundation for YUI
CSS treatments. */
body {
margin:0;
padding:0;
}
</style>
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" />
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/slider/assets/skins/sam/slider.css" />
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/menu/assets/skins/sam/menu.css" />
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/button/assets/skins/sam/button.css" />
<script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/dragdrop/dragdrop-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/slider/slider-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/container/container_core-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/menu/menu-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/element/element-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/button/button-min.js"></script>
<!--begin custom header content for this example-->
<style type="text/css">
/*
Margin and padding on body element
can introduce errors in determining
element position and are not recommended;
we turn them off as a foundation for YUI
CSS treatments.
*/
body {
margin: 0;
padding: 0;
}
#example {
padding: 1em;
}
#photo {
border: solid 1px #000;
}
/*
Set the "zoom" property to "normal" since it is set to "1" by the
".example-container .bd" rule in yui.css and this causes a Menu
instance's width to expand to 100% of the browser viewport.
*/
div.yuimenu .bd {
zoom: normal;
}
/* Style the <div> element containing the Button instance */
#opacitycontrols {
border-top: solid 1px #000;
padding: .5em .25em;
margin-top: .5em;
}
/* Style the Slider instance */
#slider-bg {
position: relative;
background: url(yui_2.7.0b-assets/button-assets/bg-fader.gif) 7px 12px no-repeat;
height: 28px;
width: 217px;
}
#slider-thumb {
cursor: default;
position: absolute;
top: 4px;
}
/*
Give the <em> element wrapping the Button instance's text label a
fixed width so that the Button doesn't grow or shrink as the
text label is updated.
*/
#opacitybutton-currentopacity {
width: 3em;
font-style: normal;
display: block;
text-align: left;
}
#opacitybutton {
vertical-align: middle;
}
</style>
<!--end custom header content for this example-->
</head>
<body class=" yui-skin-sam">
<h1>Slider Button</h1>
<div class="exampleIntro">
<p>
This example demonstrates how to combine a Split Button with a Slider to
create an opacity slider button, similar to that found in Adobe Photoshop.
</p>
</div>
<!--BEGIN SOURCE CODE FOR EXAMPLE -->
<script type="text/javascript">
(function() {
var Event = YAHOO.util.Event;
Event.onContentReady("example", function () {
var Dom = YAHOO.util.Dom,
oSlider;
/*
Create a <div> element to house a Button instance and its
corresponding <label> element.
*/
var oDIV = document.createElement("div")
oDIV.id = "opacitycontrols";
oDIV.innerHTML = "<label for=\"opacitybutton-button\">Opacity:</label>";
Dom.get("example").appendChild(oDIV);
/*
Create a Menu instance whose body element will house a
Slider instance.
*/
var oOpacityMenu = new YAHOO.widget.Menu("opacitymenu", { width: "220px" });
/*
Create a new Button instance, wrapping the label in an
<em> element. The <em> element will be used to give the
Button instance a fixed width to prevent it from growing
and shrinking as the text label is updated.
*/
var oButton = new YAHOO.widget.Button({
type: "menu",
id: "opacitybutton",
label: "<em id=\"opacitybutton-currentopacity\">100%</em>",
menu: oOpacityMenu,
container: "opacitycontrols" });
/*
Maintain a reference to the <em> element inside the label
so that its text can easily be updated in response to the firing
of the Slider instance's "change" event.
*/
var oCurrentOpacity;
oButton.on("appendTo", function () {
// Add Slider markup to the Menu instance's body element
oOpacityMenu.setBody("<div id=\"slider-bg\" tabindex=\"1\" title=\"Slider\"><div id=\"slider-thumb\"><img src=\"yui_2.7.0b-assets/button-assets/thumb-n.gif\"></div></div>");
/*
Render the Menu instance into the element specified as the
Button instance's container
*/
oOpacityMenu.render(this.get("container"));
oCurrentOpacity = Dom.get("opacitybutton-currentopacity");
});
/*
Give the Button instance's <button> element an id so that
clicking its corresponding <label> element will result in the
Button instance receiving focus.
*/
var oHTMLButton = oButton.get("element").getElementsByTagName("button")[0];
oHTMLButton.id = "opacitybutton-button";
/*
Add a "beforeShow" event handler to the Menu instance that
will instantiate the Slider.
*/
var onMenuBeforeShow = function () {
// Instantiate the Slider
oSlider = YAHOO.widget.Slider.getHorizSlider("slider-bg", "slider-thumb", 0, 200, 1);
// Set the initial value of the Slider instance
oSlider.setValue(200, true);
// Maintain a reference to the Slider instance's root element
var oSliderEl = Dom.get("slider-bg");
// Subscribe to the Slider instance's "change" event
oSlider.subscribe("change", function() {
/*
Divide the pixel offset in half to get a value between
0 and 100 - used to convey the current opacity via the
Button instance's label.
*/
var nValue = (Math.round(oSlider.getValue() * .5)),
/*
Divide by 100 in order to set provide a compatible
value for the CSS "opacity" property.
*/
nOpacity = (nValue * .01);
/*
Update the title attribute of the Slider instance's
root element. This helps assistive technology to
communicate the state change.
*/
oSliderEl.title = "slider value = " + Math.round(nOpacity);
// Set the opacity of the photo
Dom.setStyle("photo", "opacity", nOpacity);
// Update the text label of the Button instance
oCurrentOpacity.innerHTML = (nValue + "%");
});
var focusSlider = function () {
if ((YAHOO.env.ua.ie || YAHOO.env.ua.gecko) && oSliderEl) {
window.setTimeout(function () {
oSliderEl.focus();
}, 0);
}
};
focusSlider();
// Focus the Slider instance each time it is made visible
oOpacityMenu.subscribe("show", focusSlider);
// Unsubscribe from the "beforeShow" event, since we only need to initialize the
// Slider once.
oOpacityMenu.unsubscribe("beforeShow", onMenuBeforeShow);
};
oOpacityMenu.subscribe("beforeShow", onMenuBeforeShow);
});
})();
</script>
<div id="example"><a href="http://www.flickr.com/photos/toddlr/477993821/" title="Photo Sharing"><img id="photo" src="http://farm1.static.flickr.com/198/477993821_0079194851.jpg" width="500" height="375" alt="Ella - A Shih Tzu + Maltese Mix Puppy"></a></div>
<!--END SOURCE CODE FOR EXAMPLE -->
</body>
</html>
<!-- presentbright.corp.yahoo.com uncompressed/chunked Thu Feb 19 10:53:06 PST 2009 -->
yui_2.7.0b.zip( 4,431 k)Related examples in the same category