X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/c930e9176a5a85509c5b0230e2bff5c22a591432..530ef4b6c5b943cfa68b779d11cf7de29aa878bf:/docs/source/Menu.html diff --git a/docs/source/Menu.html b/docs/source/Menu.html index 756c50c3..4f67209a 100644 --- a/docs/source/Menu.html +++ b/docs/source/Menu.html @@ -1,747 +1,729 @@ - - - The source code - - - - - 
/**
- * @class Ext.layout.MenuLayout
- * @extends Ext.layout.ContainerLayout
- * 
Layout manager used by {@link Ext.menu.Menu}. Generally this class should not need to be used directly.

- */
- Ext.layout.MenuLayout = Ext.extend(Ext.layout.ContainerLayout, {
-    monitorResize : true,
-
-    setContainer : function(ct){
-        this.monitorResize = !ct.floating;
-        Ext.layout.MenuLayout.superclass.setContainer.call(this, ct);
-    },
-
-    renderItem : function(c, position, target){
-        if (!this.itemTpl) {
-            this.itemTpl = Ext.layout.MenuLayout.prototype.itemTpl = new Ext.XTemplate(
-                '
  • ',
-                    '',
-                        '',
-                    '',
-                '
    • '
-            );
-        }
-
-        if(c && !c.rendered){
-            if(Ext.isNumber(position)){
-                position = target.dom.childNodes[position];
-            }
-            var a = this.getItemArgs(c);
-
-//          The Component's positionEl is the 
  •  it is rendered into
-            c.render(c.positionEl = position ?
-                this.itemTpl.insertBefore(position, a, true) :
-                this.itemTpl.append(target, a, true));
-
-//          Link the containing 
  •  to the item.
-            c.positionEl.menuItemId = c.itemId || c.id;
-
-//          If rendering a regular Component, and it needs an icon,
-//          move the Component rightwards.
-            if (!a.isMenuItem && a.needsIcon) {
-                c.positionEl.addClass('x-menu-list-item-indent');
-            }
-        }else if(c && !this.isValidParent(c, target)){
-            if(Ext.isNumber(position)){
-                position = target.dom.childNodes[position];
-            }
-            target.dom.insertBefore(c.getActionEl().dom, position || null);
-        }
-    },
-
-    getItemArgs : function(c) {
-        var isMenuItem = c instanceof Ext.menu.Item;
-        return {
-            isMenuItem: isMenuItem,
-            needsIcon: !isMenuItem && (c.icon || c.iconCls),
-            icon: c.icon || Ext.BLANK_IMAGE_URL,
-            iconCls: 'x-menu-item-icon ' + (c.iconCls || ''),
-            itemId: 'x-menu-el-' + c.id,
-            itemCls: 'x-menu-list-item ' + (this.extraCls || '')
-        };
-    },
-
-//  Valid if the Component is in a 
  •  which is part of our target
    • - + + + + The source code + + + + + 
    /*!
+ * Ext JS Library 3.2.1
+ * Copyright(c) 2006-2010 Ext JS, Inc.
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+
    /**
+ * @class Ext.menu.Menu
+ * @extends Ext.Container
+ * 
    A menu object.  This is the container to which you may add menu items.  Menu can also serve as a base class
+ * when you want a specialized menu based off of another component (like {@link Ext.menu.DateMenu} for example).
    
+ * 
    Menus may contain either {@link Ext.menu.Item menu items}, or general {@link Ext.Component Component}s.
    
+ * 
    To make a contained general {@link Ext.Component Component} line up with other {@link Ext.menu.Item menu items}
+ * specify iconCls: 'no-icon'.  This reserves a space for an icon, and indents the Component in line
+ * with the other menu items.  See {@link Ext.form.ComboBox}.{@link Ext.form.ComboBox#getListParent getListParent}
+ * for an example.
    
+ * 
    By default, Menus are absolutely positioned, floating Components. By configuring a Menu with
+ * {@link #floating}:false, a Menu may be used as child of a Container.
    
+ *
+ * @xtype menu
+ */
+Ext.menu.Menu = Ext.extend(Ext.Container, {
+    
    /**
+     * @cfg {Object} defaults
+     * A config object that will be applied to all items added to this container either via the {@link #items}
+     * config or via the {@link #add} method.  The defaults config can contain any number of
+     * name/value property pairs to be added to each item, and should be valid for the types of items
+     * being added to the menu.
+     */
+    
    /**
+     * @cfg {Mixed} items
+     * An array of items to be added to this menu. Menus may contain either {@link Ext.menu.Item menu items},
+     * or general {@link Ext.Component Component}s.
+     */
+    
    /**
+     * @cfg {Number} minWidth The minimum width of the menu in pixels (defaults to 120)
+     */
+    minWidth : 120,
+    
    /**
+     * @cfg {Boolean/String} shadow True or 'sides' for the default effect, 'frame' for 4-way shadow, and 'drop'
+     * for bottom-right shadow (defaults to 'sides')
+     */
+    shadow : 'sides',
+    
    /**
+     * @cfg {String} subMenuAlign The {@link Ext.Element#alignTo} anchor position value to use for submenus of
+     * this menu (defaults to 'tl-tr?')
+     */
+    subMenuAlign : 'tl-tr?',
+    
    /**
+     * @cfg {String} defaultAlign The default {@link Ext.Element#alignTo} anchor position value for this menu
+     * relative to its element of origin (defaults to 'tl-bl?')
+     */
+    defaultAlign : 'tl-bl?',
+    
    /**
+     * @cfg {Boolean} allowOtherMenus True to allow multiple menus to be displayed at the same time (defaults to false)
+     */
+    allowOtherMenus : false,
+    
    /**
+     * @cfg {Boolean} ignoreParentClicks True to ignore clicks on any item in this menu that is a parent item (displays
+     * a submenu) so that the submenu is not dismissed when clicking the parent item (defaults to false).
+     */
+    ignoreParentClicks : false,
+    
    /**
+     * @cfg {Boolean} enableScrolling True to allow the menu container to have scroller controls if the menu is too long (defaults to true).
+     */
+    enableScrolling : true,
+    
    /**
+     * @cfg {Number} maxHeight The maximum height of the menu. Only applies when enableScrolling is set to True (defaults to null).
+     */
+    maxHeight : null,
+    
    /**
+     * @cfg {Number} scrollIncrement The amount to scroll the menu. Only applies when enableScrolling is set to True (defaults to 24).
+     */
+    scrollIncrement : 24,
+    
    /**
+     * @cfg {Boolean} showSeparator True to show the icon separator. (defaults to true).
+     */
+    showSeparator : true,
+    
    /**
+     * @cfg {Array} defaultOffsets An array specifying the [x, y] offset in pixels by which to
+     * change the default Menu popup position after aligning according to the {@link #defaultAlign}
+     * configuration. Defaults to [0, 0].
+     */
+    defaultOffsets : [0, 0],
+
+    
    /**
+     * @cfg {Boolean} plain
+     * True to remove the incised line down the left side of the menu. Defaults to false.
+     */
+    plain : false,
+
+    
    /**
+     * @cfg {Boolean} floating
+     * 
    By default, a Menu configured as floating:true
+     * will be rendered as an {@link Ext.Layer} (an absolutely positioned,
+     * floating Component with zindex=15000).
+     * If configured as floating:false, the Menu may be
+     * used as child item of another Container instead of a free-floating
+     * {@link Ext.Layer Layer}.
+     */
+    floating : true,
+
+
+    
    /**
+     * @cfg {Number} zIndex
+     * zIndex to use when the menu is floating.
+     */
+    zIndex: 15000,
+
+    // private
+    hidden : true,
+
+    
    /**
+     * @cfg {String/Object} layout
+     * This class assigns a default layout (layout:'menu').
+     * Developers may override this configuration option if another layout is required.
+     * See {@link Ext.Container#layout} for additional information.
+     */
+    layout : 'menu',
+    hideMode : 'offsets',    // Important for laying out Components
+    scrollerHeight : 8,
+    autoLayout : true,       // Provided for backwards compat
+    defaultType : 'menuitem',
+    bufferResize : false,
+
+    initComponent : function(){
+        if(Ext.isArray(this.initialConfig)){
+            Ext.apply(this, {items:this.initialConfig});
+        }
+        this.addEvents(
+            
    /**
+             * @event click
+             * Fires when this menu is clicked (or when the enter key is pressed while it is active)
+             * @param {Ext.menu.Menu} this
+            * @param {Ext.menu.Item} menuItem The menu item that was clicked
+             * @param {Ext.EventObject} e
+             */
+            'click',
+            
    /**
+             * @event mouseover
+             * Fires when the mouse is hovering over this menu
+             * @param {Ext.menu.Menu} this
+             * @param {Ext.EventObject} e
+             * @param {Ext.menu.Item} menuItem The menu item that was clicked
+             */
+            'mouseover',
+            
    /**
+             * @event mouseout
+             * Fires when the mouse exits this menu
+             * @param {Ext.menu.Menu} this
+             * @param {Ext.EventObject} e
+             * @param {Ext.menu.Item} menuItem The menu item that was clicked
+             */
+            'mouseout',
+            
    /**
+             * @event itemclick
+             * Fires when a menu item contained in this menu is clicked
+             * @param {Ext.menu.BaseItem} baseItem The BaseItem that was clicked
+             * @param {Ext.EventObject} e
+             */
+            'itemclick'
+        );
+        Ext.menu.MenuMgr.register(this);
+        if(this.floating){
+            Ext.EventManager.onWindowResize(this.hide, this);
+        }else{
+            if(this.initialConfig.hidden !== false){
+                this.hidden = false;
+            }
+            this.internalDefaults = {hideOnClick: false};
+        }
+        Ext.menu.Menu.superclass.initComponent.call(this);
+        if(this.autoLayout){
+            var fn = this.doLayout.createDelegate(this, []);
+            this.on({
+                add: fn,
+                remove: fn
+            });
+        }
+    },
+
+    //private
+    getLayoutTarget : function() {
+        return this.ul;
+    },
+
+    // private
+    onRender : function(ct, position){
+        if(!ct){
+            ct = Ext.getBody();
+        }
+
+        var dh = {
+            id: this.getId(),
+            cls: 'x-menu ' + ((this.floating) ? 'x-menu-floating x-layer ' : '') + (this.cls || '') + (this.plain ? ' x-menu-plain' : '') + (this.showSeparator ? '' : ' x-menu-nosep'),
+            style: this.style,
+            cn: [
+                {tag: 'a', cls: 'x-menu-focus', href: '#', onclick: 'return false;', tabIndex: '-1'},
+                {tag: 'ul', cls: 'x-menu-list'}
+            ]
+        };
+        if(this.floating){
+            this.el = new Ext.Layer({
+                shadow: this.shadow,
+                dh: dh,
+                constrain: false,
+                parentEl: ct,
+                zindex: this.zIndex
+            });
+        }else{
+            this.el = ct.createChild(dh);
+        }
+        Ext.menu.Menu.superclass.onRender.call(this, ct, position);
+
+        if(!this.keyNav){
+            this.keyNav = new Ext.menu.MenuNav(this);
+        }
+        // generic focus element
+        this.focusEl = this.el.child('a.x-menu-focus');
+        this.ul = this.el.child('ul.x-menu-list');
+        this.mon(this.ul, {
+            scope: this,
+            click: this.onClick,
+            mouseover: this.onMouseOver,
+            mouseout: this.onMouseOut
+        });
+        if(this.enableScrolling){
+            this.mon(this.el, {
+                scope: this,
+                delegate: '.x-menu-scroller',
+                click: this.onScroll,
+                mouseover: this.deactivateActive
+            });
+        }
+    },
+
+    // private
+    findTargetItem : function(e){
+        var t = e.getTarget('.x-menu-list-item', this.ul, true);
+        if(t && t.menuItemId){
+            return this.items.get(t.menuItemId);
+        }
+    },
+
+    // private
+    onClick : function(e){
+        var t = this.findTargetItem(e);
+        if(t){
+            if(t.isFormField){
+                this.setActiveItem(t);
+            }else if(t instanceof Ext.menu.BaseItem){
+                if(t.menu && this.ignoreParentClicks){
+                    t.expandMenu();
+                    e.preventDefault();
+                }else if(t.onClick){
+                    t.onClick(e);
+                    this.fireEvent('click', this, t, e);
+                }
+            }
+        }
+    },
+
+    // private
+    setActiveItem : function(item, autoExpand){
+        if(item != this.activeItem){
+            this.deactivateActive();
+            if((this.activeItem = item).isFormField){
+                item.focus();
+            }else{
+                item.activate(autoExpand);
+            }
+        }else if(autoExpand){
+            item.expandMenu();
+        }
+    },
+
+    deactivateActive : function(){
+        var a = this.activeItem;
+        if(a){
+            if(a.isFormField){
+                //Fields cannot deactivate, but Combos must collapse
+                if(a.collapse){
+                    a.collapse();
+                }
+            }else{
+                a.deactivate();
+            }
+            delete this.activeItem;
+        }
+    },
+
+    // private
+    tryActivate : function(start, step){
+        var items = this.items;
+        for(var i = start, len = items.length; i >= 0 && i < len; i+= step){
+            var item = items.get(i);
+            if(!item.disabled && (item.canActivate || item.isFormField)){
+                this.setActiveItem(item, false);
+                return item;
+            }
+        }
+        return false;
+    },
+
+    // private
+    onMouseOver : function(e){
+        var t = this.findTargetItem(e);
+        if(t){
+            if(t.canActivate && !t.disabled){
+                this.setActiveItem(t, true);
+            }
+        }
+        this.over = true;
+        this.fireEvent('mouseover', this, e, t);
+    },
+
+    // private
+    onMouseOut : function(e){
+        var t = this.findTargetItem(e);
+        if(t){
+            if(t == this.activeItem && t.shouldDeactivate && t.shouldDeactivate(e)){
+                this.activeItem.deactivate();
+                delete this.activeItem;
+            }
+        }
+        this.over = false;
+        this.fireEvent('mouseout', this, e, t);
+    },
+
+    // private
+    onScroll : function(e, t){
+        if(e){
+            e.stopEvent();
+        }
+        var ul = this.ul.dom, top = Ext.fly(t).is('.x-menu-scroller-top');
+        ul.scrollTop += this.scrollIncrement * (top ? -1 : 1);
+        if(top ? ul.scrollTop <= 0 : ul.scrollTop + this.activeMax >= ul.scrollHeight){
+           this.onScrollerOut(null, t);
+        }
+    },
+
+    // private
+    onScrollerIn : function(e, t){
+        var ul = this.ul.dom, top = Ext.fly(t).is('.x-menu-scroller-top');
+        if(top ? ul.scrollTop > 0 : ul.scrollTop + this.activeMax < ul.scrollHeight){
+            Ext.fly(t).addClass(['x-menu-item-active', 'x-menu-scroller-active']);
+        }
+    },
+
+    // private
+    onScrollerOut : function(e, t){
+        Ext.fly(t).removeClass(['x-menu-item-active', 'x-menu-scroller-active']);
+    },
+
+    
    /**
+     * If {@link #floating}=true, shows this menu relative to
+     * another element using {@link #showat}, otherwise uses {@link Ext.Component#show}.
+     * @param {Mixed} element The element to align to
+     * @param {String} position (optional) The {@link Ext.Element#alignTo} anchor position to use in aligning to
+     * the element (defaults to this.defaultAlign)
+     * @param {Ext.menu.Menu} parentMenu (optional) This menu's parent menu, if applicable (defaults to undefined)
+     */
+    show : function(el, pos, parentMenu){
+        if(this.floating){
+            this.parentMenu = parentMenu;
+            if(!this.el){
+                this.render();
+                this.doLayout(false, true);
+            }
+            this.showAt(this.el.getAlignToXY(el, pos || this.defaultAlign, this.defaultOffsets), parentMenu);
+        }else{
+            Ext.menu.Menu.superclass.show.call(this);
+        }
+    },
+
+    
    /**
+     * Displays this menu at a specific xy position and fires the 'show' event if a
+     * handler for the 'beforeshow' event does not return false cancelling the operation.
+     * @param {Array} xyPosition Contains X & Y [x, y] values for the position at which to show the menu (coordinates are page-based)
+     * @param {Ext.menu.Menu} parentMenu (optional) This menu's parent menu, if applicable (defaults to undefined)
+     */
+    showAt : function(xy, parentMenu){
+        if(this.fireEvent('beforeshow', this) !== false){
+            this.parentMenu = parentMenu;
+            if(!this.el){
+                this.render();
+            }
+            if(this.enableScrolling){
+                // set the position so we can figure out the constrain value.
+                this.el.setXY(xy);
+                //constrain the value, keep the y coordinate the same
+                xy[1] = this.constrainScroll(xy[1]);
+                xy = [this.el.adjustForConstraints(xy)[0], xy[1]];
+            }else{
+                //constrain to the viewport.
+                xy = this.el.adjustForConstraints(xy);
+            }
+            this.el.setXY(xy);
+            this.el.show();
+            Ext.menu.Menu.superclass.onShow.call(this);
+            if(Ext.isIE){
+                // internal event, used so we don't couple the layout to the menu
+                this.fireEvent('autosize', this);
+                if(!Ext.isIE8){
+                    this.el.repaint();
+                }
+            }
+            this.hidden = false;
+            this.focus();
+            this.fireEvent('show', this);
+        }
+    },
+
+    constrainScroll : function(y){
+        var max, full = this.ul.setHeight('auto').getHeight(),
+            returnY = y, normalY, parentEl, scrollTop, viewHeight;
+        if(this.floating){
+            parentEl = Ext.fly(this.el.dom.parentNode);
+            scrollTop = parentEl.getScroll().top;
+            viewHeight = parentEl.getViewSize().height;
+            //Normalize y by the scroll position for the parent element.  Need to move it into the coordinate space
+            //of the view.
+            normalY = y - scrollTop;
+            max = this.maxHeight ? this.maxHeight : viewHeight - normalY;
+            if(full > viewHeight) {
+                max = viewHeight;
+                //Set returnY equal to (0,0) in view space by reducing y by the value of normalY
+                returnY = y - normalY;
+            } else if(max < full) {
+                returnY = y - (full - max);
+                max = full;
+            }
+        }else{
+            max = this.getHeight();
+        }
+        // Always respect maxHeight 
+        if (this.maxHeight){
+            max = Math.min(this.maxHeight, max);
+        }
+        if(full > max && max > 0){
+            this.activeMax = max - this.scrollerHeight * 2 - this.el.getFrameWidth('tb') - Ext.num(this.el.shadowOffset, 0);
+            this.ul.setHeight(this.activeMax);
+            this.createScrollers();
+            this.el.select('.x-menu-scroller').setDisplayed('');
+        }else{
+            this.ul.setHeight(full);
+            this.el.select('.x-menu-scroller').setDisplayed('none');
+        }
+        this.ul.dom.scrollTop = 0;
+        return returnY;
+    },
+
+    createScrollers : function(){
+        if(!this.scroller){
+            this.scroller = {
+                pos: 0,
+                top: this.el.insertFirst({
+                    tag: 'div',
+                    cls: 'x-menu-scroller x-menu-scroller-top',
+                    html: ' '
+                }),
+                bottom: this.el.createChild({
+                    tag: 'div',
+                    cls: 'x-menu-scroller x-menu-scroller-bottom',
+                    html: ' '
+                })
+            };
+            this.scroller.top.hover(this.onScrollerIn, this.onScrollerOut, this);
+            this.scroller.topRepeater = new Ext.util.ClickRepeater(this.scroller.top, {
+                listeners: {
+                    click: this.onScroll.createDelegate(this, [null, this.scroller.top], false)
+                }
+            });
+            this.scroller.bottom.hover(this.onScrollerIn, this.onScrollerOut, this);
+            this.scroller.bottomRepeater = new Ext.util.ClickRepeater(this.scroller.bottom, {
+                listeners: {
+                    click: this.onScroll.createDelegate(this, [null, this.scroller.bottom], false)
+                }
+            });
+        }
+    },
+
+    onLayout : function(){
+        if(this.isVisible()){
+            if(this.enableScrolling){
+                this.constrainScroll(this.el.getTop());
+            }
+            if(this.floating){
+                this.el.sync();
+            }
+        }
+    },
+
+    focus : function(){
+        if(!this.hidden){
+            this.doFocus.defer(50, this);
+        }
+    },
+
+    doFocus : function(){
+        if(!this.hidden){
+            this.focusEl.focus();
+        }
+    },
+
+    
    /**
+     * Hides this menu and optionally all parent menus
+     * @param {Boolean} deep (optional) True to hide all parent menus recursively, if any (defaults to false)
+     */
+    hide : function(deep){
+        if (!this.isDestroyed) {
+            this.deepHide = deep;
+            Ext.menu.Menu.superclass.hide.call(this);
+            delete this.deepHide;
+        }
+    },
+
+    // private
+    onHide : function(){
+        Ext.menu.Menu.superclass.onHide.call(this);
+        this.deactivateActive();
+        if(this.el && this.floating){
+            this.el.hide();
+        }
+        var pm = this.parentMenu;
+        if(this.deepHide === true && pm){
+            if(pm.floating){
+                pm.hide(true);
+            }else{
+                pm.deactivateActive();
+            }
+        }
+    },
+
+    // private
+    lookupComponent : function(c){
+         if(Ext.isString(c)){
+            c = (c == 'separator' || c == '-') ? new Ext.menu.Separator() : new Ext.menu.TextItem(c);
+             this.applyDefaults(c);
+         }else{
+            if(Ext.isObject(c)){
+                c = this.getMenuItem(c);
+            }else if(c.tagName || c.el){ // element. Wrap it.
+                c = new Ext.BoxComponent({
+                    el: c
+                });
+            }
+         }
+         return c;
+    },
+
+    applyDefaults : function(c){
+        if(!Ext.isString(c)){
+            c = Ext.menu.Menu.superclass.applyDefaults.call(this, c);
+            var d = this.internalDefaults;
+            if(d){
+                if(c.events){
+                    Ext.applyIf(c.initialConfig, d);
+                    Ext.apply(c, d);
+                }else{
+                    Ext.applyIf(c, d);
+                }
+            }
+        }
+        return c;
+    },
+
+    // private
+    getMenuItem : function(config){
+       if(!config.isXType){
+            if(!config.xtype && Ext.isBoolean(config.checked)){
+                return new Ext.menu.CheckItem(config)
+            }
+            return Ext.create(config, this.defaultType);
+        }
+        return config;
+    },
+
+    
    /**
+     * Adds a separator bar to the menu
+     * @return {Ext.menu.Item} The menu item that was added
+     */
+    addSeparator : function(){
+        return this.add(new Ext.menu.Separator());
+    },
+
+    
    /**
+     * Adds an {@link Ext.Element} object to the menu
+     * @param {Mixed} el The element or DOM node to add, or its id
+     * @return {Ext.menu.Item} The menu item that was added
+     */
+    addElement : function(el){
+        return this.add(new Ext.menu.BaseItem({
+            el: el
+        }));
+    },
+
+    
    /**
+     * Adds an existing object based on {@link Ext.menu.BaseItem} to the menu
+     * @param {Ext.menu.Item} item The menu item to add
+     * @return {Ext.menu.Item} The menu item that was added
+     */
+    addItem : function(item){
+        return this.add(item);
+    },
+
+    
    /**
+     * Creates a new {@link Ext.menu.Item} based an the supplied config object and adds it to the menu
+     * @param {Object} config A MenuItem config object
+     * @return {Ext.menu.Item} The menu item that was added
+     */
+    addMenuItem : function(config){
+        return this.add(this.getMenuItem(config));
+    },
+
+    
    /**
+     * Creates a new {@link Ext.menu.TextItem} with the supplied text and adds it to the menu
+     * @param {String} text The text to display in the menu item
+     * @return {Ext.menu.Item} The menu item that was added
+     */
+    addText : function(text){
+        return this.add(new Ext.menu.TextItem(text));
+    },
+
+    //private
+    onDestroy : function(){
+        Ext.EventManager.removeResizeListener(this.hide, this);
+        var pm = this.parentMenu;
+        if(pm && pm.activeChild == this){
+            delete pm.activeChild;
+        }
+        delete this.parentMenu;
+        Ext.menu.Menu.superclass.onDestroy.call(this);
+        Ext.menu.MenuMgr.unregister(this);
+        if(this.keyNav) {
+            this.keyNav.disable();
+        }
+        var s = this.scroller;
+        if(s){
+            Ext.destroy(s.topRepeater, s.bottomRepeater, s.top, s.bottom);
+        }
+        Ext.destroy(
+            this.el,
+            this.focusEl,
+            this.ul
+        );
+    }
+});
+
+Ext.reg('menu', Ext.menu.Menu);
+
+// MenuNav is a private utility class used internally by the Menu
+Ext.menu.MenuNav = Ext.extend(Ext.KeyNav, function(){
+    function up(e, m){
+        if(!m.tryActivate(m.items.indexOf(m.activeItem)-1, -1)){
+            m.tryActivate(m.items.length-1, -1);
+        }
+    }
+    function down(e, m){
+        if(!m.tryActivate(m.items.indexOf(m.activeItem)+1, 1)){
+            m.tryActivate(0, 1);
+        }
+    }
+    return {
+        constructor : function(menu){
+            Ext.menu.MenuNav.superclass.constructor.call(this, menu.el);
+            this.scope = this.menu = menu;
+        },
+
+        doRelay : function(e, h){
+            var k = e.getKey();
+//          Keystrokes within a form Field (e.g.: down in a Combo) do not navigate. Allow only TAB
+            if (this.menu.activeItem && this.menu.activeItem.isFormField && k != e.TAB) {
+                return false;
+            }
+            if(!this.menu.activeItem && e.isNavKeyPress() && k != e.SPACE && k != e.RETURN){
+                this.menu.tryActivate(0, 1);
+                return false;
+            }
+            return h.call(this.scope || this, e, this.menu);
+        },
+
+        tab: function(e, m) {
+            e.stopEvent();
+            if (e.shiftKey) {
+                up(e, m);
+            } else {
+                down(e, m);
+            }
+        },
+
+        up : up,
+
+        down : down,
+
+        right : function(e, m){
+            if(m.activeItem){
+                m.activeItem.expandMenu(true);
+            }
+        },
+
+        left : function(e, m){
+            m.hide();
+            if(m.parentMenu && m.parentMenu.activeItem){
+                m.parentMenu.activeItem.activate();
+            }
+        },
+
+        enter : function(e, m){
+            if(m.activeItem){
+                e.stopPropagation();
+                m.activeItem.onClick(e);
+                m.fireEvent('click', this, m.activeItem);
+                return true;
+            }
+        }
+    };
+}());
+
    + \ No newline at end of file