Shadow.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>The source code</title>
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<pre class="prettyprint lang-js"><span id='Ext-Shadow'>/**
</span> * 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.
*/
Ext.define('Ext.Shadow', {
requires: ['Ext.ShadowPool'],
<span id='Ext-Shadow-method-constructor'> /**
</span> * Creates new Shadow.
* @param {Object} config (optional) Config object.
*/
constructor: function(config) {
var me = this,
adjusts,
offset,
rad;
Ext.apply(me, config);
if (!Ext.isString(me.mode)) {
me.mode = me.defaultMode;
}
offset = me.offset;
rad = Math.floor(offset / 2);
me.opacity = 50;
switch (me.mode.toLowerCase()) {
// all this hideous nonsense calculates the various offsets for shadows
case "drop":
if (Ext.supports.CSS3BoxShadow) {
adjusts = {
t: offset,
l: offset,
h: -offset,
w: -offset
};
}
else {
adjusts = {
t: -rad,
l: -rad,
h: -rad,
w: -rad
};
}
break;
case "sides":
if (Ext.supports.CSS3BoxShadow) {
adjusts = {
t: offset,
l: 0,
h: -offset,
w: 0
};
}
else {
adjusts = {
t: - (1 + rad),
l: 1 + rad - 2 * offset,
h: -1,
w: rad - 1
};
}
break;
case "frame":
if (Ext.supports.CSS3BoxShadow) {
adjusts = {
t: 0,
l: 0,
h: 0,
w: 0
};
}
else {
adjusts = {
t: 1 + rad - 2 * offset,
l: 1 + rad - 2 * offset,
h: offset - rad - 1,
w: offset - rad - 1
};
}
break;
}
me.adjusts = adjusts;
},
<span id='Ext-Shadow-method-getShadowSize'> /**
</span> * @private
* Returns the shadow size on each side of the element in standard CSS order: top, right, bottom, left;
* @return {Number[]} Top, right, bottom and left shadow size.
*/
getShadowSize: function() {
var me = this,
offset = me.el ? me.offset : 0,
result = [offset, offset, offset, offset],
mode = me.mode.toLowerCase();
// There are only offsets if the shadow element is present.
if (me.el && mode !== 'frame') {
result[0] = 0;
if (mode == 'drop') {
result[3] = 0;
}
}
return result;
},
<span id='Ext-Shadow-cfg-mode'> /**
</span> * @cfg {String} mode
* The shadow display mode. Supports the following options:
*
* - sides : Shadow displays on both sides and bottom only</li>
* - frame : Shadow displays equally on all four sides</li>
* - drop : Traditional bottom-right drop shadow</li>
*/
<span id='Ext-Shadow-cfg-offset'> /**
</span> * @cfg {Number} offset
* The number of pixels to offset the shadow from the element
*/
offset: 4,
// private
defaultMode: "drop",
// private - CSS property to use to set the box shadow
boxShadowProperty: (function() {
var property = 'boxShadow',
style = document.documentElement.style;
if (!('boxShadow' in style)) {
if ('WebkitBoxShadow' in style) {
// Safari prior to version 5.1 and Chrome prior to version 10
property = 'WebkitBoxShadow';
}
else if ('MozBoxShadow' in style) {
// FF 3.5 & 3.6
property = 'MozBoxShadow';
}
}
return property;
}()),
<span id='Ext-Shadow-method-show'> /**
</span> * Displays the shadow under the target element
* @param {String/HTMLElement/Ext.Element} targetEl The id or element under which the shadow should display
*/
show: function(target) {
var me = this,
index;
target = Ext.get(target);
if (!me.el) {
me.el = Ext.ShadowPool.pull();
if (me.el.dom.nextSibling != target.dom) {
me.el.insertBefore(target);
}
}
index = (parseInt(target.getStyle("z-index"), 10) - 1) || 0;
me.el.setStyle("z-index", me.zIndex || index);
if (Ext.isIE && !Ext.supports.CSS3BoxShadow) {
me.el.dom.style.filter = "progid:DXImageTransform.Microsoft.alpha(opacity=" + me.opacity + ") progid:DXImageTransform.Microsoft.Blur(pixelradius=" + (me.offset) + ")";
}
me.realign(
target.getLocalX(),
target.getLocalY(),
target.dom.offsetWidth,
target.dom.offsetHeight
);
me.el.dom.style.display = "block";
},
<span id='Ext-Shadow-method-isVisible'> /**
</span> * Returns true if the shadow is visible, else false
*/
isVisible: function() {
return this.el ? true: false;
},
<span id='Ext-Shadow-method-realign'> /**
</span> * 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, targetWidth, targetHeight) {
if (!this.el) {
return;
}
var adjusts = this.adjusts,
d = this.el.dom,
targetStyle = d.style,
shadowWidth,
shadowHeight,
sws,
shs;
targetStyle.left = (l + adjusts.l) + "px";
targetStyle.top = (t + adjusts.t) + "px";
shadowWidth = Math.max(targetWidth + adjusts.w, 0);
shadowHeight = Math.max(targetHeight + adjusts.h, 0);
sws = shadowWidth + "px";
shs = shadowHeight + "px";
if (targetStyle.width != sws || targetStyle.height != shs) {
targetStyle.width = sws;
targetStyle.height = shs;
if (Ext.supports.CSS3BoxShadow) {
targetStyle[this.boxShadowProperty] = '0 0 ' + this.offset + 'px #888';
}
}
},
<span id='Ext-Shadow-method-hide'> /**
</span> * Hides this shadow
*/
hide: function() {
var me = this;
if (me.el) {
me.el.dom.style.display = "none";
Ext.ShadowPool.push(me.el);
delete me.el;
}
},
<span id='Ext-Shadow-method-setZIndex'> /**
</span> * 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);
}
},
<span id='Ext-Shadow-method-setOpacity'> /**
</span> * Sets the opacity of the shadow
* @param {Number} opacity The opacity
*/
setOpacity: function(opacity){
if (this.el) {
if (Ext.isIE && !Ext.supports.CSS3BoxShadow) {
opacity = Math.floor(opacity * 100 / 2) / 100;
}
this.opacity = opacity;
this.el.setOpacity(opacity);
}
}
});</pre>
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