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%'
+    }]
+});
+ * 
  */
-/**
- * @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;

- +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, + type: 'anchor', + + getLayoutTargetSize : function() { + var target = this.container.getLayoutTarget(); + if (!target) { + return {}; + } + // Style Sized (scrollbars not included) + return target.getStyleSize(); + }, + + // private + onLayout : function(ct, target){ + Ext.layout.AnchorLayout.superclass.onLayout.call(this, ct, target); + var size = this.getLayoutTargetSize(); + + 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 = this.getRenderedItems(ct), len = cs.length, i, c, a, cw, ch, el, vs; + for(i = 0; i < len; i++){ + c = cs[i]; + el = c.getPositionEl(); + if(c.anchor){ + a = c.anchorSpec; + if(!a){ // cache all anchor values + 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) - el.getMargins('lr'), c) : undefined; + ch = a.bottom ? this.adjustHeightAnchor(a.bottom(h) - el.getMargins('tb'), 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; +