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<html>
<head>
<title>The source code</title>
<link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="../resources/prettify/prettify.js"></script>
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<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.0.3
* Copyright(c) 2006-2009 Ext JS, LLC
* licensing@extjs.com
* http://www.extjs.com/license
*/
<div id="cls-Ext.layout.AnchorLayout"></div>/**
* @class Ext.layout.AnchorLayout
* @extends Ext.layout.ContainerLayout
* <p>This is a layout that enables anchoring of contained elements relative to the container's dimensions.
* If the container is resized, all anchored items are automatically rerendered according to their
* <b><tt>{@link #anchor}</tt></b> rules.</p>
* <p>This class is intended to be extended or created via the layout:'anchor' {@link Ext.Container#layout}
* config, and should generally not need to be created directly via the new keyword.</p>
* <p>AnchorLayout does not have any direct config options (other than inherited ones). By default,
* AnchorLayout will calculate anchor measurements based on the size of the container itself. However, the
* container using the AnchorLayout can supply an anchoring-specific config property of <b>anchorSize</b>.
* If anchorSize is specifed, the layout will use it as a virtual container for the purposes of calculating
* anchor measurements based on it instead, allowing the container to be sized independently of the anchoring
* logic if necessary. For example:</p>
* <pre><code>
var viewport = new Ext.Viewport({
layout:'anchor',
anchorSize: {width:800, height:600},
items:[{
title:'Item 1',
html:'Content 1',
width:800,
anchor:'right 20%'
},{
title:'Item 2',
html:'Content 2',
width:300,
anchor:'50% 30%'
},{
title:'Item 3',
html:'Content 3',
width:600,
anchor:'-100 50%'
}]
});
* </code></pre>
*/
Ext.layout.AnchorLayout = Ext.extend(Ext.layout.ContainerLayout, {
<div id="cfg-Ext.layout.AnchorLayout-anchor"></div>/**
* @cfg {String} anchor
* <p>This configuation option is to be applied to <b>child <tt>items</tt></b> of a container managed by
* this layout (ie. configured with <tt>layout:'anchor'</tt>).</p><br/>
*
* <p>This value is what tells the layout how an item should be anchored to the container. <tt>items</tt>
* added to an AnchorLayout accept an anchoring-specific config property of <b>anchor</b> which is a string
* containing two values: the horizontal anchor value and the vertical anchor value (for example, '100% 50%').
* The following types of anchor values are supported:<div class="mdetail-params"><ul>
*
* <li><b>Percentage</b> : Any value between 1 and 100, expressed as a percentage.<div class="sub-desc">
* The first anchor is the percentage width that the item should take up within the container, and the
* second is the percentage height. For example:<pre><code>
// two values specified
anchor: '100% 50%' // render item complete width of the container and
// 1/2 height of the container
// one value specified
anchor: '100%' // the width value; the height will default to auto
* </code></pre></div></li>
*
* <li><b>Offsets</b> : Any positive or negative integer value.<div class="sub-desc">
* This is a raw adjustment where the first anchor is the offset from the right edge of the container,
* and the second is the offset from the bottom edge. For example:<pre><code>
// two values specified
anchor: '-50 -100' // render item the complete width of the container
// minus 50 pixels and
// the complete height minus 100 pixels.
// one value specified
anchor: '-50' // anchor value is assumed to be the right offset value
// bottom offset will default to 0
* </code></pre></div></li>
*
* <li><b>Sides</b> : Valid values are <tt>'right'</tt> (or <tt>'r'</tt>) and <tt>'bottom'</tt>
* (or <tt>'b'</tt>).<div class="sub-desc">
* Either the container must have a fixed size or an anchorSize config value defined at render time in
* order for these to have any effect.</div></li>
*
* <li><b>Mixed</b> : <div class="sub-desc">
* Anchor values can also be mixed as needed. For example, to render the width offset from the container
* right edge by 50 pixels and 75% of the container's height use:
* <pre><code>
anchor: '-50 75%'
* </code></pre></div></li>
*
*
* </ul></div>
*/
// private
monitorResize:true,
// private
getAnchorViewSize : function(ct, target){
return target.dom == document.body ?
target.getViewSize() : target.getStyleSize();
},
// private
onLayout : function(ct, target){
Ext.layout.AnchorLayout.superclass.onLayout.call(this, ct, target);
var size = this.getAnchorViewSize(ct, target);
var w = size.width, h = size.height;
if(w < 20 && h < 20){
return;
}
// find the container anchoring size
var aw, ah;
if(ct.anchorSize){
if(typeof ct.anchorSize == 'number'){
aw = ct.anchorSize;
}else{
aw = ct.anchorSize.width;
ah = ct.anchorSize.height;
}
}else{
aw = ct.initialConfig.width;
ah = ct.initialConfig.height;
}
var cs = ct.items.items, len = cs.length, i, c, a, cw, ch;
for(i = 0; i < len; i++){
c = cs[i];
if(c.anchor){
a = c.anchorSpec;
if(!a){ // cache all anchor values
var vs = c.anchor.split(' ');
c.anchorSpec = a = {
right: this.parseAnchor(vs[0], c.initialConfig.width, aw),
bottom: this.parseAnchor(vs[1], c.initialConfig.height, ah)
};
}
cw = a.right ? this.adjustWidthAnchor(a.right(w), c) : undefined;
ch = a.bottom ? this.adjustHeightAnchor(a.bottom(h), c) : undefined;
if(cw || ch){
c.setSize(cw || undefined, ch || undefined);
}
}
}
},
// private
parseAnchor : function(a, start, cstart){
if(a && a != 'none'){
var last;
if(/^(r|right|b|bottom)$/i.test(a)){ // standard anchor
var diff = cstart - start;
return function(v){
if(v !== last){
last = v;
return v - diff;
}
}
}else if(a.indexOf('%') != -1){
var ratio = parseFloat(a.replace('%', ''))*.01; // percentage
return function(v){
if(v !== last){
last = v;
return Math.floor(v*ratio);
}
}
}else{
a = parseInt(a, 10);
if(!isNaN(a)){ // simple offset adjustment
return function(v){
if(v !== last){
last = v;
return v + a;
}
}
}
}
}
return false;
},
// private
adjustWidthAnchor : function(value, comp){
return value;
},
// private
adjustHeightAnchor : function(value, comp){
return value;
}
<div id="prop-Ext.layout.AnchorLayout-activeItem"></div>/**
* @property activeItem
* @hide
*/
});
Ext.Container.LAYOUTS['anchor'] = Ext.layout.AnchorLayout;</pre>
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