The source code

/** - * @class Ext.layout.AnchorLayout - * @extends Ext.layout.ContainerLayout - *

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 - * {@link #anchor} rules.

- *

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.

- *

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 anchorSize. - * 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:

- *


-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%'
-    }]
-});
- *

- */ -Ext.layout.AnchorLayout = Ext.extend(Ext.layout.ContainerLayout, { -

/** - * @cfg {String} anchor - *

This configuation option is to be applied to child items of a container managed by - * this layout (ie. configured with layout:'anchor').

- * - *

This value is what tells the layout how an item should be anchored to the container. items - * added to an AnchorLayout accept an anchoring-specific config property of anchor 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:

Percentage : Any value between 1 and 100, expressed as a percentage.

- * 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:


-// 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
-     *

Offsets : Any positive or negative integer value.

- * 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:


-// 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
-     *

Sides : Valid values are 'right' (or 'r') and 'bottom' - * (or 'b').
- * 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.
Mixed :
- * 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: - *
```
-anchor: '-50 75%' 
-     * 
```

- */ - - // 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; - } - -

/** - * @property activeItem - * @hide - */ -}); -Ext.Container.LAYOUTS['anchor'] = Ext.layout.AnchorLayout;

+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%' + }] +}); + *

+// 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 + *

+// 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 + *