RBG Slider Control
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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>RBG Slider Control</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" />
<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/animation/animation-min.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>
<!--begin custom header content for this example-->
<style type="text/css">
.dragPanel { position: relative; background-color: #eee; border: 1px solid #336; top: 0px; left: 20px; width: 320px; height: 180px; }
.dragPanel h4 { background-color: #336; height: 10px; margin: 0px; cursor: move; }
input { font-size: 0.85em} .thumb { cursor:default; width:18px; height:18px; z-index: 9; position: absolute; left: 0px; }
.bg { position:absolute; left:10px; height:18px; width:146px; border: 0px solid #aaaaaa; }
.bg span, .bg p { cursor:default; position: relative; font-size: 2px; overflow: hidden; color: #aaaaaa; top: 4px; height: 10px; width: 4px; display: block; float:left; }
.bg span { border-top:1px solid #cccccc; border-bottom:1px solid #cccccc; }
.bg .lb { border-left:1px solid #cccccc; }
.bg .rb { border-right:1px solid #cccccc; }
#valdiv { position:absolute; top: 100px; left:10px; }
#rBG {-moz-outline: none; outline:0px none;top:30px}
#gBG {-moz-outline: none; outline:0px none;top:50px}
#bBG {-moz-outline: none; outline:0px none;top:70px}
#swatch { position:absolute; left:160px; top:34px; height:50px; width:50px; border:1px solid #aaaaaa; }
</style>
<!--end custom header content for this example-->
</head>
<body class=" yui-skin-sam">
<h1>RBG Slider Control</h1>
<div class="exampleIntro">
<p>The RGB slider implements the <a href="http://developer.yahoo.com/yui/slider/">YUI Slider Control</a> to create three sliders which, between them, generate an
RGB color. The background color of each slider is also dynamically modified to reflect the colors that could be
generated by moving a single slider; this affords greater visual feedback to the user and allows her to have a quicker intuitive sense about how to get the desired result.</p>
<p>(<strong>Note:</strong> YUI also includes a full <a href="http://developer.yahoo.com/yui/colorpicker/">Color Picker Control</a> with a complete set of configurable options.)</p>
</div>
<!--BEGIN SOURCE CODE FOR EXAMPLE -->
<div id="ddRGB" class="dragPanel">
<h4 id="pickerHandle"> </h4>
<div id="rBG" class="bg" tabindex="1" hidefocus="true">
<div id="rthumb" class="thumb"><img src="yui_2.7.0b-assets/slider-assets/thumb-rgb.png" /></div>
</div>
<div id="gBG" class="bg" tabindex="2" hidefocus="true">
<div id="gthumb" class="thumb"><img src="yui_2.7.0b-assets/slider-assets/thumb-rgb.png" /></div>
</div>
<div id="bBG" class="bg" tabindex="3" hidefocus="true">
<div id="bthumb" class="thumb"><img src="yui_2.7.0b-assets/slider-assets/thumb-rgb.png" /></div>
</div>
<div id="valdiv">
<form name="rgbform">
<table border="0">
<tr>
<td>
RGB
</td>
<td>
<input autocomplete="off" tabindex="3" name="rval" id="rval" type="text" value="0" size="4" maxlength="4" />
<input autocomplete="off" tabindex="4" name="gval" id="gval" type="text" value="0" size="4" maxlength="4" />
<input autocomplete="off" tabindex="5" name="bval" id="bval" type="text" value="0" size="4" maxlength="4" />
</td>
<td>
<input tabindex="6" id="rgbSubmit" type="button" value="Update" />
</td>
</tr>
<tr>
<td>
Hex: #
</td>
<td>
<input autocomplete="off" tabindex="7" name="hexval" id="hexval" type="text" value="" size="6" maxlength="6" />
</td>
<td>
<input tabindex="8" id="hexSubmit" type="button" value="Update" />
</td>
</tr>
<tr>
<td>
<input tabindex="9" id="resetButton" type="button" value="Reset" />
</td>
</tr>
</table>
</form>
</div>
<div id="swatch"> </div>
</div>
<!-- color.js extracted from the colorpicker widget -->
<script type="text/javascript" src="yui_2.7.0b-assets/slider-assets/color.js"></script>
<script type="text/javascript">
YAHOO.example.RGBSlider = function() {
var Event = YAHOO.util.Event,
Dom = YAHOO.util.Dom,
Color = YAHOO.util.Color,
Slider = YAHOO.widget.Slider,
r, g, b, dd;
function updateSliderColors() {
var curr, curg, curb;
curr = Math.min(r.getValue() * 2, 255);
curg = Math.min(g.getValue() * 2, 255);
curb = Math.min(b.getValue() * 2, 255);
YAHOO.log("updateSliderColor " + curr + ", " + curg + ", " + curb);
for (var i=0; i<34; i++) {
Dom.setStyle("rBG" + i, "background-color",
"rgb(" + (i*8) + "," + curg + "," + curb + ")");
Dom.setStyle("gBG" + i, "background-color",
"rgb(" + curr + "," + (i*8) + "," + curb + ")");
Dom.setStyle("bBG" + i, "background-color",
"rgb(" + curr + "," + curg + "," + (i*8) + ")");
}
Dom.setStyle("swatch", "background-color",
"rgb(" + curr + "," + curg + "," + curb + ")");
Dom.get("hexval").value = Color.rgb2hex(curr, curg, curb);
}
function isValidRGB(a) {
if ((!a[0] && a[0] !=0) || isNaN(a[0]) || a[0] < 0 || a[0] > 255) return false;
if ((!a[1] && a[1] !=0) || isNaN(a[1]) || a[1] < 0 || a[1] > 255) return false;
if ((!a[2] && a[2] !=0) || isNaN(a[2]) || a[2] < 0 || a[2] > 255) return false;
return true;
}
function listenerUpdate(whichSlider, newVal) {
newVal = Math.min(255, newVal);
Dom.get(whichSlider + "val").value = newVal;
updateSliderColors();
}
return {
userReset: function() {
var v;
var f = document.forms['rgbform'];
r.setValue(0);
g.setValue(0);
b.setValue(0);
},
rgbInit: function() {
r = Slider.getHorizSlider("rBG", "rthumb", 0, 128);
r.subscribe("change", function(newVal) { listenerUpdate("r", newVal*2); });
g = Slider.getHorizSlider("gBG", "gthumb", 0, 128);
g.subscribe("change", function(newVal) { listenerUpdate("g", newVal*2); });
b = Slider.getHorizSlider("bBG", "bthumb", 0, 128);
b.subscribe("change", function(newVal) { listenerUpdate("b", newVal*2); });
this.initColor();
dd = new YAHOO.util.DD("ddRGB");
dd.setHandleElId("pickerHandle");
},
initColor: function() {
var ch = " ";
d = document.createElement("P");
d.className = "rb";
r.getEl().appendChild(d);
d = document.createElement("P");
d.className = "rb";
g.getEl().appendChild(d);
d = document.createElement("P");
d.className = "rb";
b.getEl().appendChild(d);
for (var i=0; i<34; i++) {
d = document.createElement("SPAN");
d.id = "rBG" + i
// d.innerHTML = ch;
r.getEl().appendChild(d);
d = document.createElement("SPAN");
d.id = "gBG" + i
// d.innerHTML = ch;
g.getEl().appendChild(d);
d = document.createElement("SPAN");
d.id = "bBG" + i
// d.innerHTML = ch;
b.getEl().appendChild(d);
}
d = document.createElement("P");
d.className = "lb";
r.getEl().appendChild(d);
d = document.createElement("P");
d.className = "lb";
g.getEl().appendChild(d);
d = document.createElement("P");
d.className = "lb";
b.getEl().appendChild(d);
this.userUpdate();
},
hexUpdate: function(e) {
return this.userUpdate(e, true);
},
userUpdate: function(e, isHex) {
var v;
var f = document.forms['rgbform'];
if (isHex) {
var hexval = f["hexval"].value;
// shorthand #369
if (hexval.length == 3) {
var newval = "";
for (var i=0;i<3;i++) {
var a = hexval.substr(i, 1);
newval += a + a;
}
hexval = newval;
}
YAHOO.log("hexval:" + hexval);
if (hexval.length != 6) {
alert("illegal hex code: " + hexval);
} else {
var rgb = Color.hex2rgb(hexval);
// alert(rgb.toString());
if (isValidRGB(rgb)) {
f['rval'].value = rgb[0];
f['gval'].value = rgb[1];
f['bval'].value = rgb[2];
}
}
}
// red
v = parseFloat(f['rval'].value);
v = ( isNaN(v) ) ? 0 : Math.round(v);
YAHOO.log("setValue, r: " + v);
r.setValue(Math.round(v) / 2);
v = parseFloat(f['gval'].value);
v = ( isNaN(v) ) ? 0 : Math.round(v);
YAHOO.log("setValue, g: " + g);
g.setValue(Math.round(v) / 2);
v = parseFloat(f['bval'].value);
v = ( isNaN(v) ) ? 0 : Math.round(v);
YAHOO.log("setValue, b: " + b);
b.setValue(Math.round(v) / 2);
updateSliderColors();
if (e) {
Event.stopEvent(e);
}
},
init: function() {
this.rgbInit();
Event.on("rgbForm", "submit", this.userUpdate);
Event.on("rgbSubmit", "click", this.userUpdate);
Event.on("hexSubmit", "click", this.hexUpdate, this, true);
Event.on("resetButton", "click", this.userReset);
}
};
}();
YAHOO.util.Event.onDOMReady(YAHOO.example.RGBSlider.init,
YAHOO.example.RGBSlider, true);
</script>
<!--END SOURCE CODE FOR EXAMPLE -->
</body>
</html>
<!-- presentbright.corp.yahoo.com uncompressed/chunked Thu Feb 19 10:53:18 PST 2009 -->
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