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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>The source code</title>
<link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
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<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.4.0
* Copyright(c) 2006-2011 Sencha Inc.
* licensing@sencha.com
* http://www.sencha.com/license
*/
<div id="cls-Ext.Shadow"></div>/**
* @class Ext.Shadow
* Simple class that can provide a shadow effect for any element. Note that the element MUST be absolutely positioned,
* and the shadow does not provide any shimming. This should be used only in simple cases -- for more advanced
* functionality that can also provide the same shadow effect, see the {@link Ext.Layer} class.
* @constructor
* Create a new Shadow
* @param {Object} config The config object
*/
Ext.Shadow = function(config) {
Ext.apply(this, config);
if (typeof this.mode != "string") {
this.mode = this.defaultMode;
}
var o = this.offset,
a = {
h: 0
},
rad = Math.floor(this.offset / 2);
switch (this.mode.toLowerCase()) {
// all this hideous nonsense calculates the various offsets for shadows
case "drop":
a.w = 0;
a.l = a.t = o;
a.t -= 1;
if (Ext.isIE) {
a.l -= this.offset + rad;
a.t -= this.offset + rad;
a.w -= rad;
a.h -= rad;
a.t += 1;
}
break;
case "sides":
a.w = (o * 2);
a.l = -o;
a.t = o - 1;
if (Ext.isIE) {
a.l -= (this.offset - rad);
a.t -= this.offset + rad;
a.l += 1;
a.w -= (this.offset - rad) * 2;
a.w -= rad + 1;
a.h -= 1;
}
break;
case "frame":
a.w = a.h = (o * 2);
a.l = a.t = -o;
a.t += 1;
a.h -= 2;
if (Ext.isIE) {
a.l -= (this.offset - rad);
a.t -= (this.offset - rad);
a.l += 1;
a.w -= (this.offset + rad + 1);
a.h -= (this.offset + rad);
a.h += 1;
}
break;
};
this.adjusts = a;
};
Ext.Shadow.prototype = {
<div id="cfg-Ext.Shadow-mode"></div>/**
* @cfg {String} mode
* The shadow display mode. Supports the following options:<div class="mdetail-params"><ul>
* <li><b><tt>sides</tt></b> : Shadow displays on both sides and bottom only</li>
* <li><b><tt>frame</tt></b> : Shadow displays equally on all four sides</li>
* <li><b><tt>drop</tt></b> : Traditional bottom-right drop shadow</li>
* </ul></div>
*/
<div id="cfg-Ext.Shadow-offset"></div>/**
* @cfg {String} offset
* The number of pixels to offset the shadow from the element (defaults to <tt>4</tt>)
*/
offset: 4,
// private
defaultMode: "drop",
<div id="method-Ext.Shadow-show"></div>/**
* Displays the shadow under the target element
* @param {Mixed} targetEl The id or element under which the shadow should display
*/
show: function(target) {
target = Ext.get(target);
if (!this.el) {
this.el = Ext.Shadow.Pool.pull();
if (this.el.dom.nextSibling != target.dom) {
this.el.insertBefore(target);
}
}
this.el.setStyle("z-index", this.zIndex || parseInt(target.getStyle("z-index"), 10) - 1);
if (Ext.isIE) {
this.el.dom.style.filter = "progid:DXImageTransform.Microsoft.alpha(opacity=50) progid:DXImageTransform.Microsoft.Blur(pixelradius=" + (this.offset) + ")";
}
this.realign(
target.getLeft(true),
target.getTop(true),
target.getWidth(),
target.getHeight()
);
this.el.dom.style.display = "block";
},
<div id="method-Ext.Shadow-isVisible"></div>/**
* Returns true if the shadow is visible, else false
*/
isVisible: function() {
return this.el ? true: false;
},
<div id="method-Ext.Shadow-realign"></div>/**
* Direct alignment when values are already available. Show must be called at least once before
* calling this method to ensure it is initialized.
* @param {Number} left The target element left position
* @param {Number} top The target element top position
* @param {Number} width The target element width
* @param {Number} height The target element height
*/
realign: function(l, t, w, h) {
if (!this.el) {
return;
}
var a = this.adjusts,
d = this.el.dom,
s = d.style,
iea = 0,
sw = (w + a.w),
sh = (h + a.h),
sws = sw + "px",
shs = sh + "px",
cn,
sww;
s.left = (l + a.l) + "px";
s.top = (t + a.t) + "px";
if (s.width != sws || s.height != shs) {
s.width = sws;
s.height = shs;
if (!Ext.isIE) {
cn = d.childNodes;
sww = Math.max(0, (sw - 12)) + "px";
cn[0].childNodes[1].style.width = sww;
cn[1].childNodes[1].style.width = sww;
cn[2].childNodes[1].style.width = sww;
cn[1].style.height = Math.max(0, (sh - 12)) + "px";
}
}
},
<div id="method-Ext.Shadow-hide"></div>/**
* Hides this shadow
*/
hide: function() {
if (this.el) {
this.el.dom.style.display = "none";
Ext.Shadow.Pool.push(this.el);
delete this.el;
}
},
<div id="method-Ext.Shadow-setZIndex"></div>/**
* Adjust the z-index of this shadow
* @param {Number} zindex The new z-index
*/
setZIndex: function(z) {
this.zIndex = z;
if (this.el) {
this.el.setStyle("z-index", z);
}
}
};
// Private utility class that manages the internal Shadow cache
Ext.Shadow.Pool = function() {
var p = [],
markup = Ext.isIE ?
'<div class="x-ie-shadow"></div>':
'<div class="x-shadow"><div class="xst"><div class="xstl"></div><div class="xstc"></div><div class="xstr"></div></div><div class="xsc"><div class="xsml"></div><div class="xsmc"></div><div class="xsmr"></div></div><div class="xsb"><div class="xsbl"></div><div class="xsbc"></div><div class="xsbr"></div></div></div>';
return {
pull: function() {
var sh = p.shift();
if (!sh) {
sh = Ext.get(Ext.DomHelper.insertHtml("beforeBegin", document.body.firstChild, markup));
sh.autoBoxAdjust = false;
}
return sh;
},
push: function(sh) {
p.push(sh);
}
};
}();</pre>
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