Dropdown button with slider
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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.
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<!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>
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