X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/2e847cf21b8ab9d15fa167b315ca5b2fa92638fc..0494b8d9b9bb03ab6c22b34dae81261e3cd7e3e6:/src/widgets/layout/BoxLayout.js

diff --git a/src/widgets/layout/BoxLayout.js b/src/widgets/layout/BoxLayout.js
index 2034c127..730cd6d3 100644
--- a/src/widgets/layout/BoxLayout.js
+++ b/src/widgets/layout/BoxLayout.js
@@ -1,8 +1,8 @@
 /*!
- * Ext JS Library 3.1.1
- * Copyright(c) 2006-2010 Ext JS, LLC
- * licensing@extjs.com
- * http://www.extjs.com/license
+ * Ext JS Library 3.3.1
+ * Copyright(c) 2006-2010 Sencha Inc.
+ * licensing@sencha.com
+ * http://www.sencha.com/license
  */
 /**
  * @class Ext.layout.BoxLayout
@@ -71,411 +71,274 @@ Ext.layout.BoxLayout = Ext.extend(Ext.layout.ContainerLayout, {
 
     constructor : function(config){
         Ext.layout.BoxLayout.superclass.constructor.call(this, config);
-        if(Ext.isString(this.defaultMargins)){
+
+        if (Ext.isString(this.defaultMargins)) {
             this.defaultMargins = this.parseMargins(this.defaultMargins);
         }
+        
+        var handler = this.overflowHandler;
+        
+        if (typeof handler == 'string') {
+            handler = {
+                type: handler
+            };
+        }
+        
+        var handlerType = 'none';
+        if (handler && handler.type != undefined) {
+            handlerType = handler.type;
+        }
+        
+        var constructor = Ext.layout.boxOverflow[handlerType];
+        if (constructor[this.type]) {
+            constructor = constructor[this.type];
+        }
+        
+        this.overflowHandler = new constructor(this, handler);
     },
 
-    // private
-    isValidParent : function(c, target){
-        return this.innerCt && c.getPositionEl().dom.parentNode == this.innerCt.dom;
-    },
+    /**
+     * @private
+     * Runs the child box calculations and caches them in childBoxCache. Subclasses can used these cached values
+     * when laying out
+     */
+    onLayout: function(container, target) {
+        Ext.layout.BoxLayout.superclass.onLayout.call(this, container, target);
 
-    // private
-    renderAll : function(ct, target){
-        if(!this.innerCt){
-            // the innerCt prevents wrapping and shuffling while
-            // the container is resizing
-            this.innerCt = target.createChild({cls:this.innerCls});
-            this.padding = this.parseMargins(this.padding);
+        var tSize = this.getLayoutTargetSize(),
+            items = this.getVisibleItems(container),
+            calcs = this.calculateChildBoxes(items, tSize),
+            boxes = calcs.boxes,
+            meta  = calcs.meta;
+        
+        //invoke the overflow handler, if one is configured
+        if (tSize.width > 0) {
+            var handler = this.overflowHandler,
+                method  = meta.tooNarrow ? 'handleOverflow' : 'clearOverflow';
+            
+            var results = handler[method](calcs, tSize);
+            
+            if (results) {
+                if (results.targetSize) {
+                    tSize = results.targetSize;
+                }
+                
+                if (results.recalculate) {
+                    items = this.getVisibleItems(container);
+                    calcs = this.calculateChildBoxes(items, tSize);
+                    boxes = calcs.boxes;
+                }
+            }
         }
-        Ext.layout.BoxLayout.superclass.renderAll.call(this, ct, this.innerCt);
-    },
+        
+        /**
+         * @private
+         * @property layoutTargetLastSize
+         * @type Object
+         * Private cache of the last measured size of the layout target. This should never be used except by
+         * BoxLayout subclasses during their onLayout run.
+         */
+        this.layoutTargetLastSize = tSize;
+        
+        /**
+         * @private
+         * @property childBoxCache
+         * @type Array
+         * Array of the last calculated height, width, top and left positions of each visible rendered component
+         * within the Box layout.
+         */
+        this.childBoxCache = calcs;
+        
+        this.updateInnerCtSize(tSize, calcs);
+        this.updateChildBoxes(boxes);
 
-    onLayout : function(ct, target){
-        this.renderAll(ct, target);
+        // Putting a box layout into an overflowed container is NOT correct and will make a second layout pass necessary.
+        this.handleTargetOverflow(tSize, container, target);
     },
 
-    getLayoutTargetSize : function(){
-        var target = this.container.getLayoutTarget(), ret;
-        if (target) {
-            ret = target.getViewSize();
-            ret.width -= target.getPadding('lr');
-            ret.height -= target.getPadding('tb');
+    /**
+     * Resizes and repositions each child component
+     * @param {Array} boxes The box measurements
+     */
+    updateChildBoxes: function(boxes) {
+        for (var i = 0, length = boxes.length; i < length; i++) {
+            var box  = boxes[i],
+                comp = box.component;
+            
+            if (box.dirtySize) {
+                comp.setSize(box.width, box.height);
+            }
+            // Don't set positions to NaN
+            if (isNaN(box.left) || isNaN(box.top)) {
+                continue;
+            }
+            
+            comp.setPosition(box.left, box.top);
         }
-        return ret;
     },
 
-    // private
-    renderItem : function(c){
-        if(Ext.isString(c.margins)){
-            c.margins = this.parseMargins(c.margins);
-        }else if(!c.margins){
-            c.margins = this.defaultMargins;
-        }
-        Ext.layout.BoxLayout.superclass.renderItem.apply(this, arguments);
-    }
-});
-
-/**
- * @class Ext.layout.VBoxLayout
- * @extends Ext.layout.BoxLayout
- * <p>A layout that arranges items vertically down a Container. This layout optionally divides available vertical
- * space between child items containing a numeric <code>flex</code> configuration.</p>
- * This layout may also be used to set the widths of child items by configuring it with the {@link #align} option.
- */
-Ext.layout.VBoxLayout = Ext.extend(Ext.layout.BoxLayout, {
     /**
-     * @cfg {String} align
-     * Controls how the child items of the container are aligned. Acceptable configuration values for this
-     * property are:
-     * <div class="mdetail-params"><ul>
-     * <li><b><tt>left</tt></b> : <b>Default</b><div class="sub-desc">child items are aligned horizontally
-     * at the <b>left</b> side of the container</div></li>
-     * <li><b><tt>center</tt></b> : <div class="sub-desc">child items are aligned horizontally at the
-     * <b>mid-width</b> of the container</div></li>
-     * <li><b><tt>stretch</tt></b> : <div class="sub-desc">child items are stretched horizontally to fill
-     * the width of the container</div></li>
-     * <li><b><tt>stretchmax</tt></b> : <div class="sub-desc">child items are stretched horizontally to
-     * the size of the largest item.</div></li>
-     * </ul></div>
-     */
-    align : 'left', // left, center, stretch, strechmax
-    type: 'vbox',
-    /**
-     * @cfg {String} pack
-     * Controls how the child items of the container are packed together. Acceptable configuration values
-     * for this property are:
-     * <div class="mdetail-params"><ul>
-     * <li><b><tt>start</tt></b> : <b>Default</b><div class="sub-desc">child items are packed together at
-     * <b>top</b> side of container</div></li>
-     * <li><b><tt>center</tt></b> : <div class="sub-desc">child items are packed together at
-     * <b>mid-height</b> of container</div></li>
-     * <li><b><tt>end</tt></b> : <div class="sub-desc">child items are packed together at <b>bottom</b>
-     * side of container</div></li>
-     * </ul></div>
-     */
-    /**
-     * @cfg {Number} flex
-     * This configuation option is to be applied to <b>child <tt>items</tt></b> of the container managed
-     * by this layout. Each child item with a <tt>flex</tt> property will be flexed <b>vertically</b>
-     * according to each item's <b>relative</b> <tt>flex</tt> value compared to the sum of all items with
-     * a <tt>flex</tt> value specified.  Any child items that have either a <tt>flex = 0</tt> or
-     * <tt>flex = undefined</tt> will not be 'flexed' (the initial size will not be changed).
+     * @private
+     * Called by onRender just before the child components are sized and positioned. This resizes the innerCt
+     * to make sure all child items fit within it. We call this before sizing the children because if our child
+     * items are larger than the previous innerCt size the browser will insert scrollbars and then remove them
+     * again immediately afterwards, giving a performance hit.
+     * Subclasses should provide an implementation.
+     * @param {Object} currentSize The current height and width of the innerCt
+     * @param {Array} calculations The new box calculations of all items to be laid out
      */
+    updateInnerCtSize: function(tSize, calcs) {
+        var align   = this.align,
+            padding = this.padding,
+            width   = tSize.width,
+            height  = tSize.height;
+        
+        if (this.type == 'hbox') {
+            var innerCtWidth  = width,
+                innerCtHeight = calcs.meta.maxHeight + padding.top + padding.bottom;
 
-    // private
-    onLayout : function(ct, target){
-        Ext.layout.VBoxLayout.superclass.onLayout.call(this, ct, target);
-
-        var cs = this.getRenderedItems(ct), csLen = cs.length,
-            c, i, cm, ch, margin, cl, diff, aw, availHeight,
-            size = this.getLayoutTargetSize(),
-            w = size.width,
-            h = size.height - this.scrollOffset,
-            l = this.padding.left,
-            t = this.padding.top,
-            isStart = this.pack == 'start',
-            extraHeight = 0,
-            maxWidth = 0,
-            totalFlex = 0,
-            usedHeight = 0,
-            idx = 0,
-            heights = [],
-            restore = [];
-
-        // Do only width calculations and apply those first, as they can affect height
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            cm = c.margins;
-            margin = cm.top + cm.bottom;
-            // Max height for align
-            maxWidth = Math.max(maxWidth, c.getWidth() + cm.left + cm.right);
-        }
-
-        var innerCtWidth = maxWidth + this.padding.left + this.padding.right;
-        switch(this.align){
-            case 'stretch':
-                this.innerCt.setSize(w, h);
-                break;
-            case 'stretchmax':
-            case 'left':
-                this.innerCt.setSize(innerCtWidth, h);
-                break;
-            case 'center':
-                this.innerCt.setSize(w = Math.max(w, innerCtWidth), h);
-                break;
-        }
-
-        var availableWidth = Math.max(0, w - this.padding.left - this.padding.right);
-        // Apply widths
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            cm = c.margins;
-            if(this.align == 'stretch'){
-                c.setWidth(((w - (this.padding.left + this.padding.right)) - (cm.left + cm.right)).constrain(
-                    c.minWidth || 0, c.maxWidth || 1000000));
-            }else if(this.align == 'stretchmax'){
-                c.setWidth((maxWidth - (cm.left + cm.right)).constrain(
-                    c.minWidth || 0, c.maxWidth || 1000000));
-            }else if(isStart && c.flex){
-                c.setWidth();
+            if (align == 'stretch') {
+                innerCtHeight = height;
+            } else if (align == 'middle') {
+                innerCtHeight = Math.max(height, innerCtHeight);
             }
+        } else {
+            var innerCtHeight = height,
+                innerCtWidth  = calcs.meta.maxWidth + padding.left + padding.right;
 
-        }
-
-        // Height calculations
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            // Total of all the flex values
-            totalFlex += c.flex || 0;
-            // Don't run height calculations on flexed items
-            if (!c.flex) {
-                // Render and layout sub-containers without a flex or height, once
-                if (!c.height && !c.hasLayout && c.doLayout) {
-                    c.doLayout();
-                }
-                ch = c.getHeight();
-            } else {
-                ch = 0;
+            if (align == 'stretch') {
+                innerCtWidth = width;
+            } else if (align == 'center') {
+                innerCtWidth = Math.max(width, innerCtWidth);
             }
-
-            cm = c.margins;
-            // Determine how much height is available to flex
-            extraHeight += ch + cm.top + cm.bottom;
         }
-        // Final avail height calc
-        availHeight = Math.max(0, (h - extraHeight - this.padding.top - this.padding.bottom));
 
-        var leftOver = availHeight;
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            if(isStart && c.flex){
-                ch = Math.floor(availHeight * (c.flex / totalFlex));
-                leftOver -= ch;
-                heights.push(ch);
-            }
-        }
-        if(this.pack == 'center'){
-            t += availHeight ? availHeight / 2 : 0;
-        }else if(this.pack == 'end'){
-            t += availHeight;
-        }
-        idx = 0;
-        // Apply heights
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            cm = c.margins;
-            t += cm.top;
-            aw = availableWidth;
-            cl = l + cm.left // default left pos
+        this.innerCt.setSize(innerCtWidth || undefined, innerCtHeight || undefined);
+    },
 
-            // Adjust left pos for centering
-            if(this.align == 'center'){
-                if((diff = availableWidth - (c.getWidth() + cm.left + cm.right)) > 0){
-                    cl += (diff/2);
-                    aw -= diff;
-                }
-            }
+    /**
+     * @private
+     * This should be called after onLayout of any BoxLayout subclass. If the target's overflow is not set to 'hidden',
+     * we need to lay out a second time because the scrollbars may have modified the height and width of the layout
+     * target. Having a Box layout inside such a target is therefore not recommended.
+     * @param {Object} previousTargetSize The size and height of the layout target before we just laid out
+     * @param {Ext.Container} container The container
+     * @param {Ext.Element} target The target element
+     */
+    handleTargetOverflow: function(previousTargetSize, container, target) {
+        var overflow = target.getStyle('overflow');
 
-            c.setPosition(cl, t);
-            if(isStart && c.flex){
-                ch = Math.max(0, heights[idx++] + (leftOver-- > 0 ? 1 : 0));
-                c.setSize(aw, ch);
-            }else{
-                ch = c.getHeight();
-            }
-            t += ch + cm.bottom;
-        }
-        // Putting a box layout into an overflowed container is NOT correct and will make a second layout pass necessary.
-        if (i = target.getStyle('overflow') && i != 'hidden' && !this.adjustmentPass) {
-            var ts = this.getLayoutTargetSize();
-            if (ts.width != size.width || ts.height != size.height){
+        if (overflow && overflow != 'hidden' &&!this.adjustmentPass) {
+            var newTargetSize = this.getLayoutTargetSize();
+            if (newTargetSize.width != previousTargetSize.width || newTargetSize.height != previousTargetSize.height){
                 this.adjustmentPass = true;
-                this.onLayout(ct, target);
+                this.onLayout(container, target);
             }
         }
+
         delete this.adjustmentPass;
-    }
-});
+    },
 
-Ext.Container.LAYOUTS.vbox = Ext.layout.VBoxLayout;
+    // private
+    isValidParent : function(c, target) {
+        return this.innerCt && c.getPositionEl().dom.parentNode == this.innerCt.dom;
+    },
 
-/**
- * @class Ext.layout.HBoxLayout
- * @extends Ext.layout.BoxLayout
- * <p>A layout that arranges items horizontally across a Container. This layout optionally divides available horizontal
- * space between child items containing a numeric <code>flex</code> configuration.</p>
- * This layout may also be used to set the heights of child items by configuring it with the {@link #align} option.
- */
-Ext.layout.HBoxLayout = Ext.extend(Ext.layout.BoxLayout, {
-    /**
-     * @cfg {String} align
-     * Controls how the child items of the container are aligned. Acceptable configuration values for this
-     * property are:
-     * <div class="mdetail-params"><ul>
-     * <li><b><tt>top</tt></b> : <b>Default</b><div class="sub-desc">child items are aligned vertically
-     * at the <b>top</b> of the container</div></li>
-     * <li><b><tt>middle</tt></b> : <div class="sub-desc">child items are aligned vertically in the
-     * <b>middle</b> of the container</div></li>
-     * <li><b><tt>stretch</tt></b> : <div class="sub-desc">child items are stretched vertically to fill
-     * the height of the container</div></li>
-     * <li><b><tt>stretchmax</tt></b> : <div class="sub-desc">child items are stretched vertically to
-     * the height of the largest item.</div></li>
-     */
-    align : 'top', // top, middle, stretch, strechmax
-    type: 'hbox',
     /**
-     * @cfg {String} pack
-     * Controls how the child items of the container are packed together. Acceptable configuration values
-     * for this property are:
-     * <div class="mdetail-params"><ul>
-     * <li><b><tt>start</tt></b> : <b>Default</b><div class="sub-desc">child items are packed together at
-     * <b>left</b> side of container</div></li>
-     * <li><b><tt>center</tt></b> : <div class="sub-desc">child items are packed together at
-     * <b>mid-width</b> of container</div></li>
-     * <li><b><tt>end</tt></b> : <div class="sub-desc">child items are packed together at <b>right</b>
-     * side of container</div></li>
-     * </ul></div>
+     * @private
+     * Returns all items that are both rendered and visible
+     * @return {Array} All matching items
      */
-    /**
-     * @cfg {Number} flex
-     * This configuation option is to be applied to <b>child <tt>items</tt></b> of the container managed
-     * by this layout. Each child item with a <tt>flex</tt> property will be flexed <b>horizontally</b>
-     * according to each item's <b>relative</b> <tt>flex</tt> value compared to the sum of all items with
-     * a <tt>flex</tt> value specified.  Any child items that have either a <tt>flex = 0</tt> or
-     * <tt>flex = undefined</tt> will not be 'flexed' (the initial size will not be changed).
-     */
-
-    // private
-    onLayout : function(ct, target){
-        Ext.layout.HBoxLayout.superclass.onLayout.call(this, ct, target);
+    getVisibleItems: function(ct) {
+        var ct  = ct || this.container,
+            t   = ct.getLayoutTarget(),
+            cti = ct.items.items,
+            len = cti.length,
 
-        var cs = this.getRenderedItems(ct), csLen = cs.length,
-            c, i, cm, cw, ch, diff, availWidth,
-            size = this.getLayoutTargetSize(),
-            w = size.width - this.scrollOffset,
-            h = size.height,
-            l = this.padding.left,
-            t = this.padding.top,
-            isStart = this.pack == 'start',
-            isRestore = ['stretch', 'stretchmax'].indexOf(this.align) == -1,
-            extraWidth = 0,
-            maxHeight = 0,
-            totalFlex = 0,
-            usedWidth = 0;
+            i, c, items = [];
 
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            // Total of all the flex values
-            totalFlex += c.flex || 0;
-            // Don't run width calculations on flexed items
-            if (!c.flex) {
-                // Render and layout sub-containers without a flex or width, once
-                if (!c.width && !c.hasLayout && c.doLayout) {
-                    c.doLayout();
-                }
-                cw = c.getWidth();
-            } else {
-                cw = 0;
+        for (i = 0; i < len; i++) {
+            if((c = cti[i]).rendered && this.isValidParent(c, t) && c.hidden !== true  && c.collapsed !== true && c.shouldLayout !== false){
+                items.push(c);
             }
-            cm = c.margins;
-            // Determine how much width is available to flex
-            extraWidth += cw + cm.left + cm.right;
-            // Max height for align
-            maxHeight = Math.max(maxHeight, c.getHeight() + cm.top + cm.bottom);
         }
-        // Final avail width calc
-        availWidth = Math.max(0, (w - extraWidth - this.padding.left - this.padding.right));
 
-        var innerCtHeight = maxHeight + this.padding.top + this.padding.bottom;
-        switch(this.align){
-            case 'stretch':
-                this.innerCt.setSize(w, h);
-                break;
-            case 'stretchmax':
-            case 'top':
-                this.innerCt.setSize(w, innerCtHeight);
-                break;
-            case 'middle':
-                this.innerCt.setSize(w, h = Math.max(h, innerCtHeight));
-                break;
+        return items;
+    },
+
+    // private
+    renderAll : function(ct, target) {
+        if (!this.innerCt) {
+            // the innerCt prevents wrapping and shuffling while the container is resizing
+            this.innerCt = target.createChild({cls:this.innerCls});
+            this.padding = this.parseMargins(this.padding);
         }
+        Ext.layout.BoxLayout.superclass.renderAll.call(this, ct, this.innerCt);
+    },
 
-        var leftOver = availWidth,
-            widths = [],
-            restore = [],
-            idx = 0,
-            availableHeight = Math.max(0, h - this.padding.top - this.padding.bottom);
+    getLayoutTargetSize : function() {
+        var target = this.container.getLayoutTarget(), ret;
+        
+        if (target) {
+            ret = target.getViewSize();
 
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            if(isStart && c.flex){
-                cw = Math.floor(availWidth * (c.flex / totalFlex));
-                leftOver -= cw;
-                widths.push(cw);
+            // IE in strict mode will return a width of 0 on the 1st pass of getViewSize.
+            // Use getStyleSize to verify the 0 width, the adjustment pass will then work properly
+            // with getViewSize
+            if (Ext.isIE && Ext.isStrict && ret.width == 0){
+                ret =  target.getStyleSize();
             }
-        }
 
-        if(this.pack == 'center'){
-            l += availWidth ? availWidth / 2 : 0;
-        }else if(this.pack == 'end'){
-            l += availWidth;
-        }
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            cm = c.margins;
-            l += cm.left;
-            c.setPosition(l, t + cm.top);
-            if(isStart && c.flex){
-                cw = Math.max(0, widths[idx++] + (leftOver-- > 0 ? 1 : 0));
-                if(isRestore){
-                    restore.push(c.getHeight());
-                }
-                c.setSize(cw, availableHeight);
-            }else{
-                cw = c.getWidth();
-            }
-            l += cw + cm.right;
+            ret.width  -= target.getPadding('lr');
+            ret.height -= target.getPadding('tb');
         }
+        
+        return ret;
+    },
 
-        idx = 0;
-        for (i = 0 ; i < csLen; i++) {
-            c = cs[i];
-            cm = c.margins;
-            ch = c.getHeight();
-            if(isStart && c.flex){
-                ch = restore[idx++];
-            }
-            if(this.align == 'stretch'){
-                c.setHeight(((h - (this.padding.top + this.padding.bottom)) - (cm.top + cm.bottom)).constrain(
-                    c.minHeight || 0, c.maxHeight || 1000000));
-            }else if(this.align == 'stretchmax'){
-                c.setHeight((maxHeight - (cm.top + cm.bottom)).constrain(
-                    c.minHeight || 0, c.maxHeight || 1000000));
-            }else{
-                if(this.align == 'middle'){
-                    diff = availableHeight - (ch + cm.top + cm.bottom);
-                    ch = t + cm.top + (diff/2);
-                    if(diff > 0){
-                        c.setPosition(c.x, ch);
-                    }
-                }
-                if(isStart && c.flex){
-                    c.setHeight(ch);
-                }
-            }
-        }
-        // Putting a box layout into an overflowed container is NOT correct and will make a second layout pass necessary.
-        if (i = target.getStyle('overflow') && i != 'hidden' && !this.adjustmentPass) {
-            var ts = this.getLayoutTargetSize();
-            if (ts.width != size.width || ts.height != size.height){
-                this.adjustmentPass = true;
-                this.onLayout(ct, target);
-            }
+    // private
+    renderItem : function(c) {
+        if(Ext.isString(c.margins)){
+            c.margins = this.parseMargins(c.margins);
+        }else if(!c.margins){
+            c.margins = this.defaultMargins;
         }
-        delete this.adjustmentPass;
+        Ext.layout.BoxLayout.superclass.renderItem.apply(this, arguments);
+    },
+    
+    /**
+     * @private
+     */
+    destroy: function() {
+        Ext.destroy(this.overflowHandler);
+        
+        Ext.layout.BoxLayout.superclass.destroy.apply(this, arguments);
     }
 });
 
-Ext.Container.LAYOUTS.hbox = Ext.layout.HBoxLayout;
+
+
+Ext.ns('Ext.layout.boxOverflow');
+
+/**
+ * @class Ext.layout.boxOverflow.None
+ * @extends Object
+ * Base class for Box Layout overflow handlers. These specialized classes are invoked when a Box Layout
+ * (either an HBox or a VBox) has child items that are either too wide (for HBox) or too tall (for VBox)
+ * for its container.
+ */
+
+Ext.layout.boxOverflow.None = Ext.extend(Object, {
+    constructor: function(layout, config) {
+        this.layout = layout;
+        
+        Ext.apply(this, config || {});
+    },
+    
+    handleOverflow: Ext.emptyFn,
+    
+    clearOverflow: Ext.emptyFn
+});
+
+
+Ext.layout.boxOverflow.none = Ext.layout.boxOverflow.None;