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