    /**
     * @class Ext.panel.AbstractPanel
     * @extends Ext.container.Container
     * A base class which provides methods common to Panel classes across the Sencha product range.
     * @private
     */
    Ext.define('Ext.panel.AbstractPanel', {

        /* Begin Definitions */

        extend: 'Ext.container.Container',

        requires: ['Ext.util.MixedCollection', 'Ext.Element', 'Ext.toolbar.Toolbar'],

        /* End Definitions */

        /**
         * @cfg {String} [baseCls='x-panel']
         * The base CSS class to apply to this panel's element.
         */
        baseCls : Ext.baseCSSPrefix + 'panel',

        /**
         * @cfg {Number/String} bodyPadding
         * A shortcut for setting a padding style on the body element. The value can either be
         * a number to be applied to all sides, or a normal css string describing padding.
         */

        /**
         * @cfg {Boolean} bodyBorder
         * A shortcut to add or remove the border on the body of a panel. This only applies to a panel
         * which has the {@link #frame} configuration set to `true`.
         */

        /**
         * @cfg {String/Object/Function} bodyStyle
         * Custom CSS styles to be applied to the panel's body element, which can be supplied as a valid CSS style string,
         * an object containing style property name/value pairs or a function that returns such a string or object.
         * For example, these two formats are interpreted to be equivalent:<pre><code>
    bodyStyle: 'background:#ffc; padding:10px;'

    bodyStyle: {
        background: '#ffc',
        padding: '10px'
    }
         * </code></pre>
         */

        /**
         * @cfg {String/String[]} bodyCls
         * A CSS class, space-delimited string of classes, or array of classes to be applied to the panel's body element.
         * The following examples are all valid:<pre><code>
    bodyCls: 'foo'
    bodyCls: 'foo bar'
    bodyCls: ['foo', 'bar']
         * </code></pre>
         */

        isPanel: true,

        componentLayout: 'dock',

        /**
         * @cfg {Object} defaultDockWeights
         * This object holds the default weights applied to dockedItems that have no weight. These start with a
         * weight of 1, to allow negative weights to insert before top items and are odd numbers
         * so that even weights can be used to get between different dock orders.
         *
         * To make default docking order match border layout, do this:
         * <pre><code>
    Ext.panel.AbstractPanel.prototype.defaultDockWeights = { top: 1, bottom: 3, left: 5, right: 7 };</code></pre>
         * Changing these defaults as above or individually on this object will effect all Panels.
         * To change the defaults on a single panel, you should replace the entire object:
         * <pre><code>
    initComponent: function () {
        // NOTE: Don't change members of defaultDockWeights since the object is shared.
        this.defaultDockWeights = { top: 1, bottom: 3, left: 5, right: 7 };

        this.callParent();
    }</code></pre>
         *
         * To change only one of the default values, you do this:
         * <pre><code>
    initComponent: function () {
        // NOTE: Don't change members of defaultDockWeights since the object is shared.
        this.defaultDockWeights = Ext.applyIf({ top: 10 }, this.defaultDockWeights);

        this.callParent();
    }</code></pre>
         */
        defaultDockWeights: { top: 1, left: 3, right: 5, bottom: 7 },

        renderTpl: [
            '<div id="{id}-body" class="{baseCls}-body<tpl if="bodyCls"> {bodyCls}</tpl>',
                ' {baseCls}-body-{ui}<tpl if="uiCls">',
                    '<tpl for="uiCls"> {parent.baseCls}-body-{parent.ui}-{.}</tpl>',
                '</tpl>"<tpl if="bodyStyle"> style="{bodyStyle}"</tpl>>',
            '</div>'
        ],

        // TODO: Move code examples into product-specific files. The code snippet below is Touch only.
        /**
         * @cfg {Object/Object[]} dockedItems
         * A component or series of components to be added as docked items to this panel.
         * The docked items can be docked to either the top, right, left or bottom of a panel.
         * This is typically used for things like toolbars or tab bars:
         * <pre><code>
    var panel = new Ext.panel.Panel({
        fullscreen: true,
        dockedItems: [{
            xtype: 'toolbar',
            dock: 'top',
            items: [{
                text: 'Docked to the top'
            }]
        }]
    });</code></pre>
         */

        border: true,

        initComponent : function() {
            var me = this;

            me.addEvents(
                /**
                 * @event bodyresize
                 * Fires after the Panel has been resized.
                 * @param {Ext.panel.Panel} p the Panel which has been resized.
                 * @param {Number} width The Panel body's new width.
                 * @param {Number} height The Panel body's new height.
                 */
                'bodyresize'
                // // inherited
                // 'activate',
                // // inherited
                // 'deactivate'
            );

            me.addChildEls('body');

            //!frame
            //!border

            if (me.frame && me.border && me.bodyBorder === undefined) {
                me.bodyBorder = false;
            }
            if (me.frame && me.border && (me.bodyBorder === false || me.bodyBorder === 0)) {
                me.manageBodyBorders = true;
            }

            me.callParent();
        },

        // @private
        initItems : function() {
            var me = this,
                items = me.dockedItems;

            me.callParent();
            me.dockedItems = Ext.create('Ext.util.MixedCollection', false, me.getComponentId);
            if (items) {
                me.addDocked(items);
            }
        },

        /**
         * Finds a docked component by id, itemId or position. Also see {@link #getDockedItems}
         * @param {String/Number} comp The id, itemId or position of the docked component (see {@link #getComponent} for details)
         * @return {Ext.Component} The docked component (if found)
         */
        getDockedComponent: function(comp) {
            if (Ext.isObject(comp)) {
                comp = comp.getItemId();
            }
            return this.dockedItems.get(comp);
        },

        /**
         * Attempts a default component lookup (see {@link Ext.container.Container#getComponent}). If the component is not found in the normal
         * items, the dockedItems are searched and the matched component (if any) returned (see {@link #getDockedComponent}). Note that docked
         * items will only be matched by component id or itemId -- if you pass a numeric index only non-docked child components will be searched.
         * @param {String/Number} comp The component id, itemId or position to find
         * @return {Ext.Component} The component (if found)
         */
        getComponent: function(comp) {
            var component = this.callParent(arguments);
            if (component === undefined && !Ext.isNumber(comp)) {
                // If the arg is a numeric index skip docked items
                component = this.getDockedComponent(comp);
            }
            return component;
        },

        /**
         * Parses the {@link bodyStyle} config if available to create a style string that will be applied to the body element.
         * This also includes {@link bodyPadding} and {@link bodyBorder} if available.
         * @return {String} A CSS style string with body styles, padding and border.
         * @private
         */
        initBodyStyles: function() {
            var me = this,
                bodyStyle = me.bodyStyle,
                styles = [],
                Element = Ext.Element,
                prop;

            if (Ext.isFunction(bodyStyle)) {
                bodyStyle = bodyStyle();
            }
            if (Ext.isString(bodyStyle)) {
                styles = bodyStyle.split(';');
            } else {
                for (prop in bodyStyle) {
                    if (bodyStyle.hasOwnProperty(prop)) {
                        styles.push(prop + ':' + bodyStyle[prop]);
                    }
                }
            }

            if (me.bodyPadding !== undefined) {
                styles.push('padding: ' + Element.unitizeBox((me.bodyPadding === true) ? 5 : me.bodyPadding));
            }
            if (me.frame && me.bodyBorder) {
                if (!Ext.isNumber(me.bodyBorder)) {
                    me.bodyBorder = 1;
                }
                styles.push('border-width: ' + Element.unitizeBox(me.bodyBorder));
            }
            delete me.bodyStyle;
            return styles.length ? styles.join(';') : undefined;
        },

        /**
         * Parse the {@link bodyCls} config if available to create a comma-delimited string of
         * CSS classes to be applied to the body element.
         * @return {String} The CSS class(es)
         * @private
         */
        initBodyCls: function() {
            var me = this,
                cls = '',
                bodyCls = me.bodyCls;

            if (bodyCls) {
                Ext.each(bodyCls, function(v) {
                    cls += " " + v;
                });
                delete me.bodyCls;
            }
            return cls.length > 0 ? cls : undefined;
        },

        /**
         * Initialized the renderData to be used when rendering the renderTpl.
         * @return {Object} Object with keys and values that are going to be applied to the renderTpl
         * @private
         */
        initRenderData: function() {
            return Ext.applyIf(this.callParent(), {
                bodyStyle: this.initBodyStyles(),
                bodyCls: this.initBodyCls()
            });
        },

        /**
         * Adds docked item(s) to the panel.
         * @param {Object/Object[]} component The Component or array of components to add. The components
         * must include a 'dock' parameter on each component to indicate where it should be docked ('top', 'right',
         * 'bottom', 'left').
         * @param {Number} pos (optional) The index at which the Component will be added
         */
        addDocked : function(items, pos) {
            var me = this,
                i = 0,
                item, length;

            items = me.prepareItems(items);
            length = items.length;

            for (; i < length; i++) {
                item = items[i];
                item.dock = item.dock || 'top';

                // Allow older browsers to target docked items to style without borders
                if (me.border === false) {
                    // item.cls = item.cls || '' + ' ' + me.baseCls + '-noborder-docked-' + item.dock;
                }

                if (pos !== undefined) {
                    me.dockedItems.insert(pos + i, item);
                }
                else {
                    me.dockedItems.add(item);
                }
                item.onAdded(me, i);
                me.onDockedAdd(item);
            }

            // Set flag which means that beforeLayout will not veto the layout due to the size not changing
            me.componentLayout.childrenChanged = true;
            if (me.rendered && !me.suspendLayout) {
                me.doComponentLayout();
            }
            return items;
        },

        // Placeholder empty functions
        onDockedAdd : Ext.emptyFn,
        onDockedRemove : Ext.emptyFn,

        /**
         * Inserts docked item(s) to the panel at the indicated position.
         * @param {Number} pos The index at which the Component will be inserted
         * @param {Object/Object[]} component. The Component or array of components to add. The components
         * must include a 'dock' paramater on each component to indicate where it should be docked ('top', 'right',
         * 'bottom', 'left').
         */
        insertDocked : function(pos, items) {
            this.addDocked(items, pos);
        },

        /**
         * Removes the docked item from the panel.
         * @param {Ext.Component} item. The Component to remove.
         * @param {Boolean} autoDestroy (optional) Destroy the component after removal.
         */
        removeDocked : function(item, autoDestroy) {
            var me = this,
                layout,
                hasLayout;

            if (!me.dockedItems.contains(item)) {
                return item;
            }

            layout = me.componentLayout;
            hasLayout = layout && me.rendered;

            if (hasLayout) {
                layout.onRemove(item);
            }

            me.dockedItems.remove(item);
            item.onRemoved();
            me.onDockedRemove(item);

            if (autoDestroy === true || (autoDestroy !== false && me.autoDestroy)) {
                item.destroy();
            } else if (hasLayout) {
                // not destroying, make any layout related removals
                layout.afterRemove(item);
            }

            // Set flag which means that beforeLayout will not veto the layout due to the size not changing
            me.componentLayout.childrenChanged = true;
            if (!me.destroying && !me.suspendLayout) {
                me.doComponentLayout();
            }

            return item;
        },

        /**
         * Retrieve an array of all currently docked Components.
         * @param {String} cqSelector A {@link Ext.ComponentQuery ComponentQuery} selector string to filter the returned items.
         * @return {Ext.Component[]} An array of components.
         */
        getDockedItems : function(cqSelector) {
            var me = this,
                defaultWeight = me.defaultDockWeights,
                dockedItems;

            if (me.dockedItems && me.dockedItems.items.length) {
                // Allow filtering of returned docked items by CQ selector.
                if (cqSelector) {
                    dockedItems = Ext.ComponentQuery.query(cqSelector, me.dockedItems.items);
                } else {
                    dockedItems = me.dockedItems.items.slice();
                }

                Ext.Array.sort(dockedItems, function(a, b) {
                    // Docked items are ordered by their visual representation by default (t,l,r,b)
                    var aw = a.weight || defaultWeight[a.dock],
                        bw = b.weight || defaultWeight[b.dock];
                    if (Ext.isNumber(aw) && Ext.isNumber(bw)) {
                        return aw - bw;
                    }
                    return 0;
                });

                return dockedItems;
            }
            return [];
        },

        // inherit docs
        addUIClsToElement: function(cls, force) {
            var me = this,
                result = me.callParent(arguments),
                classes = [Ext.baseCSSPrefix + cls, me.baseCls + '-body-' + cls, me.baseCls + '-body-' + me.ui + '-' + cls],
                array, i;

            if (!force && me.rendered) {
                if (me.bodyCls) {
                    me.body.addCls(me.bodyCls);
                } else {
                    me.body.addCls(classes);
                }
            } else {
                if (me.bodyCls) {
                    array = me.bodyCls.split(' ');

                    for (i = 0; i < classes.length; i++) {
                        if (!Ext.Array.contains(array, classes[i])) {
                            array.push(classes[i]);
                        }
                    }

                    me.bodyCls = array.join(' ');
                } else {
                    me.bodyCls = classes.join(' ');
                }
            }

            return result;
        },

        // inherit docs
        removeUIClsFromElement: function(cls, force) {
            var me = this,
                result = me.callParent(arguments),
                classes = [Ext.baseCSSPrefix + cls, me.baseCls + '-body-' + cls, me.baseCls + '-body-' + me.ui + '-' + cls],
                array, i;

            if (!force && me.rendered) {
                if (me.bodyCls) {
                    me.body.removeCls(me.bodyCls);
                } else {
                    me.body.removeCls(classes);
                }
            } else {
                if (me.bodyCls) {
                    array = me.bodyCls.split(' ');

                    for (i = 0; i < classes.length; i++) {
                        Ext.Array.remove(array, classes[i]);
                    }

                    me.bodyCls = array.join(' ');
                }
            }

            return result;
        },

        // inherit docs
        addUIToElement: function(force) {
            var me = this,
                cls = me.baseCls + '-body-' + me.ui,
                array;

            me.callParent(arguments);

            if (!force && me.rendered) {
                if (me.bodyCls) {
                    me.body.addCls(me.bodyCls);
                } else {
                    me.body.addCls(cls);
                }
            } else {
                if (me.bodyCls) {
                    array = me.bodyCls.split(' ');

                    if (!Ext.Array.contains(array, cls)) {
                        array.push(cls);
                    }

                    me.bodyCls = array.join(' ');
                } else {
                    me.bodyCls = cls;
                }
            }
        },

        // inherit docs
        removeUIFromElement: function() {
            var me = this,
                cls = me.baseCls + '-body-' + me.ui,
                array;

            me.callParent(arguments);

            if (me.rendered) {
                if (me.bodyCls) {
                    me.body.removeCls(me.bodyCls);
                } else {
                    me.body.removeCls(cls);
                }
            } else {
                if (me.bodyCls) {
                    array = me.bodyCls.split(' ');
                    Ext.Array.remove(array, cls);
                    me.bodyCls = array.join(' ');
                } else {
                    me.bodyCls = cls;
                }
            }
        },

        // @private
        getTargetEl : function() {
            return this.body;
        },

        getRefItems: function(deep) {
            var items = this.callParent(arguments),
                // deep fetches all docked items, and their descendants using '*' selector and then '* *'
                dockedItems = this.getDockedItems(deep ? '*,* *' : undefined),
                ln = dockedItems.length,
                i = 0,
                item;

            // Find the index where we go from top/left docked items to right/bottom docked items
            for (; i < ln; i++) {
                item = dockedItems[i];
                if (item.dock === 'right' || item.dock === 'bottom') {
                    break;
                }
            }

            // Return docked items in the top/left position before our container items, and
            // return right/bottom positioned items after our container items.
            // See AbstractDock.renderItems() for more information.
            return Ext.Array.splice(dockedItems, 0, i).concat(items).concat(dockedItems);
        },

        beforeDestroy: function(){
            var docked = this.dockedItems,
                c;

            if (docked) {
                while ((c = docked.first())) {
                    this.removeDocked(c, true);
                }
            }
            this.callParent();
        },

        setBorder: function(border) {
            var me = this;
            me.border = (border !== undefined) ? border : true;
            if (me.rendered) {
                me.doComponentLayout();
            }
        }
    });