/**
 * @author Nicolas Ferrero
 *
 * TablePanel is the basis of both {@link Ext.tree.Panel TreePanel} and {@link Ext.grid.Panel GridPanel}.
 *
 * TablePanel aggregates:
 *
 *  - a Selection Model
 *  - a View
 *  - a Store
 *  - Scrollers
 *  - Ext.grid.header.Container
 * 
 * @mixins Ext.grid.locking.Lockable
 */
Ext.define('Ext.panel.Table', {
    extend: 'Ext.panel.Panel',

    alias: 'widget.tablepanel',

    uses: [
        'Ext.selection.RowModel',
        'Ext.selection.CellModel',
        'Ext.selection.CheckboxModel',
        'Ext.grid.plugin.BufferedRenderer',
        'Ext.grid.header.Container',
        'Ext.grid.locking.Lockable'
    ],

    extraBaseCls: Ext.baseCSSPrefix + 'grid',
    extraBodyCls: Ext.baseCSSPrefix + 'grid-body',

    layout: 'fit',
    /**
     * @property {Boolean} hasView
     * True to indicate that a view has been injected into the panel.
     */
    hasView: false,

    // each panel should dictate what viewType and selType to use
    /**
     * @cfg {String} viewType
     * An xtype of view to use. This is automatically set to 'gridview' by {@link Ext.grid.Panel Grid}
     * and to 'treeview' by {@link Ext.tree.Panel Tree}.
     * @protected
     */
    viewType: null,

    /**
     * @cfg {Object} viewConfig
     * A config object that will be applied to the grid's UI view. Any of the config options available for
     * {@link Ext.view.Table} can be specified here. This option is ignored if {@link #view} is specified.
     */

    /**
     * @cfg {Ext.view.Table} view
     * The {@link Ext.view.Table} used by the grid. Use {@link #viewConfig} to just supply some config options to
     * view (instead of creating an entire View instance).
     */

    /**
     * @cfg {String} selType
     * An xtype of selection model to use. Defaults to 'rowmodel'. This is used to create selection model if just
     * a config object or nothing at all given in {@link #selModel} config.
     */
    selType: 'rowmodel',

    /**
     * @cfg {Ext.selection.Model/Object} selModel
     * A {@link Ext.selection.Model selection model} instance or config object.  In latter case the {@link #selType}
     * config option determines to which type of selection model this config is applied.
     */

    /**
     * @cfg {Boolean} [multiSelect=false]
     * True to enable 'MULTI' selection mode on selection model.
     * @deprecated 4.1.1 Use {@link Ext.selection.Model#mode} 'MULTI' instead.
     */

    /**
     * @cfg {Boolean} [simpleSelect=false]
     * True to enable 'SIMPLE' selection mode on selection model.
     * @deprecated 4.1.1 Use {@link Ext.selection.Model#mode} 'SIMPLE' instead.
     */

    /**
     * @cfg {Ext.data.Store} store (required)
     * The {@link Ext.data.Store Store} the grid should use as its data source.
     */

    /**
     * @cfg {String/Boolean} scroll
     * Scrollers configuration. Valid values are 'both', 'horizontal' or 'vertical'.
     * True implies 'both'. False implies 'none'.
     */
    scroll: true,

    /**
     * @cfg {Ext.grid.column.Column[]/Object} columns
     * An array of {@link Ext.grid.column.Column column} definition objects which define all columns that appear in this
     * grid. Each column definition provides the header text for the column, and a definition of where the data for that
     * column comes from.
     *
     * This can also be a configuration object for a {Ext.grid.header.Container HeaderContainer} which may override
     * certain default configurations if necessary. For example, the special layout may be overridden to use a simpler
     * layout, or one can set default values shared by all columns:
     * 
     *     columns: {
     *         items: [
     *             {
     *                 text: "Column A"
     *                 dataIndex: "field_A"
     *             },{
     *                 text: "Column B",
     *                 dataIndex: "field_B"
     *             }, 
     *             ...
     *         ],
     *         defaults: {
     *             flex: 1
     *         }
     *     }
     */

    /**
     * @cfg {Boolean} forceFit
     * True to force the columns to fit into the available width. Headers are first sized according to configuration,
     * whether that be a specific width, or flex. Then they are all proportionally changed in width so that the entire
     * content width is used. For more accurate control, it is more optimal to specify a flex setting on the columns
     * that are to be stretched & explicit widths on columns that are not.
     */

    /**
     * @cfg {Ext.grid.feature.Feature[]/Object[]/Ext.enums.Feature[]} features
     * An array of grid Features to be added to this grid. Can also be just a single feature instead of array.
     *
     * Features config behaves much like {@link #plugins}.
     * A feature can be added by either directly referencing the instance:
     *
     *     features: [Ext.create('Ext.grid.feature.GroupingSummary', {groupHeaderTpl: 'Subject: {name}'})],
     *
     * By using config object with ftype:
     *
     *     features: [{ftype: 'groupingsummary', groupHeaderTpl: 'Subject: {name}'}],
     *
     * Or with just a ftype:
     *
     *     features: ['grouping', 'groupingsummary'],
     *
     * See {@link Ext.enums.Feature} for list of all ftypes.
     */

    /**
     * @cfg {Boolean} [hideHeaders=false]
     * True to hide column headers.
     */

    /**
     * @cfg {Boolean} deferRowRender
     * Defaults to true to enable deferred row rendering.
     *
     * This allows the View to execute a refresh quickly, with the expensive update of the row structure deferred so
     * that layouts with GridPanels appear, and lay out more quickly.
     */

    /**
     * @cfg {Object} verticalScroller
     * A config object to be used when configuring the {@link Ext.grid.plugin.BufferedRenderer scroll monitor} to control
     * refreshing of data in an "infinite grid".
     * 
     * Configurations of this object allow fine tuning of data caching which can improve performance and usability
     * of the infinite grid.
     */

    deferRowRender: true,
     
    /**
     * @cfg {Boolean} sortableColumns
     * False to disable column sorting via clicking the header and via the Sorting menu items.
     */
    sortableColumns: true,

    /**
     * @cfg {Boolean} [enableLocking=false]
     * Configure as `true` to enable locking support for this grid. Alternatively, locking will also be automatically
     * enabled if any of the columns in the {@link #columns columns} configuration contain a {@link Ext.grid.column.Column#locked locked} config option.
     * 
     * A locking grid is processed in a special way. The configuration options are cloned and *two* grids are created to be the locked (left) side
     * and the normal (right) side. This Panel becomes merely a {@link Ext.container.Container container} which arranges both in an {@link Ext.layout.container.HBox HBox} layout.
     * 
     * {@link #plugins Plugins} may be targeted at either locked, or unlocked grid, or, both, in which case the plugin is cloned and used on both sides.
     * 
     * Plugins may also be targeted at the containing locking Panel.
     * 
     * This is configured by specifying a `lockableScope` property in your plugin which may have the following values:
     * 
     *  * `"both"` (the default) - The plugin is added to both grids
     *  * `"top"` - The plugin is added to the containing Panel
     *  * `"locked"` - The plugin is added to the locked (left) grid
     *  * `"normal"` - The plugin is added to the normal (right) grid
     *
     * If `both` is specified, then each copy of the plugin gains a property `lockingPartner` which references its sibling on the other side so that they
     * can synchronize operations is necessary.
     * 
     * {@link #features Features} may also be configured with `lockableScope` and may target the locked grid, the normal grid or both grids. Features
     * also get a `lockingPartner` reference injected.
     */
    enableLocking: false,

    // private property used to determine where to go down to find views
    // this is here to support locking.
    scrollerOwner: true,

    /**
     * @cfg {Boolean} [enableColumnMove=true]
     * False to disable column dragging within this grid.
     */
    enableColumnMove: true,
    
    /**
     * @cfg {Boolean} [sealedColumns=false]
     * True to constrain column dragging so that a column cannot be dragged in or out of it's
     * current group. Only relevant while {@link #enableColumnMove} is enabled.
     */
    sealedColumns: false,

    /**
     * @cfg {Boolean} [enableColumnResize=true]
     * False to disable column resizing within this grid.
     */
    enableColumnResize: true,

    /**
     * @cfg {Boolean} [enableColumnHide=true]
     * False to disable column hiding within this grid.
     */

    /**
     * @cfg {Boolean} columnLines Adds column line styling
     */

    /**
     * @cfg {Boolean} [rowLines=true] Adds row line styling
     */
    rowLines: true,

    /**
     * @cfg {Boolean} [disableSelection=false]
     * True to disable selection model.
     */

    /**
     * @cfg {String} emptyText Default text (html tags are accepted) to display in the Panel body when the Store
     * is empty. When specified, and the Store is empty, the text will be rendered inside a DIV with the CSS class "x-grid-empty".
     */
    
    /**
     * @cfg {Boolean} [allowDeselect=false]
     * True to allow deselecting a record. This config is forwarded to {@link Ext.selection.Model#allowDeselect}.
     */

    /**
     * @property {Boolean} optimizedColumnMove
     * If you are writing a grid plugin or a {Ext.grid.feature.Feature Feature} which creates a column-based structure which
     * needs a view refresh when columns are moved, then set this property in the grid.
     *
     * An example is the built in {@link Ext.grid.feature.AbstractSummary Summary} Feature. This creates summary rows, and the
     * summary columns must be in the same order as the data columns. This plugin sets the `optimizedColumnMove` to `false.
     */
    
    colLinesCls: Ext.baseCSSPrefix + 'grid-with-col-lines',
    rowLinesCls: Ext.baseCSSPrefix + 'grid-with-row-lines',
    noRowLinesCls: Ext.baseCSSPrefix + 'grid-no-row-lines',
    hiddenHeaderCtCls: Ext.baseCSSPrefix + 'grid-header-ct-hidden',
    hiddenHeaderCls: Ext.baseCSSPrefix + 'grid-header-hidden',
    resizeMarkerCls: Ext.baseCSSPrefix + 'grid-resize-marker',
    emptyCls: Ext.baseCSSPrefix + 'grid-empty',

    initComponent: function() {
        //<debug>
        if (!this.viewType) {
            Ext.Error.raise("You must specify a viewType config.");
        }
        if (this.headers) {
            Ext.Error.raise("The headers config is not supported. Please specify columns instead.");
        }
        //</debug>

        var me          = this,
            headerCtCfg = me.columns || me.colModel,
            view,
            i, len,
            // Look up the configured Store. If none configured, use the fieldless, empty Store defined in Ext.data.Store.
            store       = me.store = Ext.data.StoreManager.lookup(me.store || 'ext-empty-store'),
            columns;

        if (me.columnLines) {
            me.addCls(me.colLinesCls);
        }

        me.addCls(me.rowLines ? me.rowLinesCls : me.noRowLinesCls);

        //<debug>
        if (!headerCtCfg) {
            Ext.Error.raise("A column configuration must be specified");
        }
        //</debug>

        // The columns/colModel config may be either a fully instantiated HeaderContainer, or an array of Column definitions, or a config object of a HeaderContainer
        // Either way, we extract a columns property referencing an array of Column definitions.
        if (headerCtCfg instanceof Ext.grid.header.Container) {
            headerCtCfg.isRootHeader = true;
            me.headerCt = headerCtCfg;
        } else {

            // If any of the Column objects contain a locked property, and are not processed, this is a lockable TablePanel, a
            // special view will be injected by the Ext.grid.locking.Lockable mixin, so no processing of .
            if (me.enableLocking || me.hasLockedColumns(headerCtCfg)) {
                me.self.mixin('lockable', Ext.grid.locking.Lockable);
                me.injectLockable();
            }
            // Not lockable - create the HeaderContainer
            else {
                if (Ext.isArray(headerCtCfg)) {
                    headerCtCfg = {
                        items: headerCtCfg
                    };
                }
                Ext.apply(headerCtCfg, {
                    grid: me,
                    forceFit: me.forceFit,
                    sortable: me.sortableColumns,
                    enableColumnMove: me.enableColumnMove,
                    enableColumnResize: me.enableColumnResize,
                    sealed: me.sealedColumns,
                    isRootHeader: true
                });

                if (Ext.isDefined(me.enableColumnHide)) {
                    headerCtCfg.enableColumnHide = me.enableColumnHide;
                }

                // Create our HeaderCOntainer from the generated configuration
                if (!me.headerCt) {
                    me.headerCt = new Ext.grid.header.Container(headerCtCfg);
                }
            }
        }

        // Maintain backward compatibiliy by providing the initial column set as a property.
        me.columns = me.headerCt.getGridColumns();

        me.scrollTask = new Ext.util.DelayedTask(me.syncHorizontalScroll, me);

        me.addEvents(
            // documented on GridPanel
            'reconfigure',
            /**
             * @event viewready
             * Fires when the grid view is available (use this for selecting a default row).
             * @param {Ext.panel.Table} this
             */
            'viewready'
        );

        me.bodyCls = me.bodyCls || '';
        me.bodyCls += (' ' + me.extraBodyCls);
        
        me.cls = me.cls || '';
        me.cls += (' ' + me.extraBaseCls);

        // autoScroll is not a valid configuration
        delete me.autoScroll;

        // If this TablePanel is lockable (Either configured lockable, or any of the defined columns has a 'locked' property)
        // then a special lockable view containing 2 side-by-side grids will have been injected so we do not need to set up any UI.
        if (!me.hasView) {

            // Extract the array of leaf Column objects
            columns = me.headerCt.getGridColumns();

            // If the Store is paging blocks of the dataset in, then it can only be sorted remotely.
            if (store.buffered && !store.remoteSort) {
                for (i = 0, len = columns.length; i < len; i++) {
                    columns[i].sortable = false;
                }
            }

            if (me.hideHeaders) {
                me.headerCt.height = 0;
                // don't se the hidden property, we still need these to layout
                me.headerCt.hiddenHeaders = true;
                me.headerCt.addCls(me.hiddenHeaderCtCls);
                me.addCls(me.hiddenHeaderCls);
                // IE Quirks Mode fix
                // If hidden configuration option was used, several layout calculations will be bypassed.
                if (Ext.isIEQuirks) {
                    me.headerCt.style = {
                        display: 'none'
                    };
                }
            }

            me.relayHeaderCtEvents(me.headerCt);
            me.features = me.features || [];
            if (!Ext.isArray(me.features)) {
                me.features = [me.features];
            }
            me.dockedItems = [].concat(me.dockedItems || []);
            me.dockedItems.unshift(me.headerCt);
            me.viewConfig = me.viewConfig || {};

            // AbstractDataView will look up a Store configured as an object
            // getView converts viewConfig into a View instance
            view = me.getView();

            me.items = [view];
            me.hasView = true;

            // Add a listener to synchronize the horizontal scroll position of the headers
            // with the table view's element... Unless we are not showing headers!
            if (!me.hideHeaders) {
                view.on({
                    scroll: {
                        fn: me.onHorizontalScroll,
                        element: 'el',
                        scope: me
                    }
                });
            }

            // Attach this Panel to the Store
            me.bindStore(store, true);

            me.mon(view, {
                viewready: me.onViewReady,
                refresh: me.onRestoreHorzScroll,
                scope: me
            });
        }

        // Relay events from the View whether it be a LockingView, or a regular GridView
        me.relayEvents(me.view, [
            /**
             * @event beforeitemmousedown
             * @inheritdoc Ext.view.View#beforeitemmousedown
             */
            'beforeitemmousedown',
            /**
             * @event beforeitemmouseup
             * @inheritdoc Ext.view.View#beforeitemmouseup
             */
            'beforeitemmouseup',
            /**
             * @event beforeitemmouseenter
             * @inheritdoc Ext.view.View#beforeitemmouseenter
             */
            'beforeitemmouseenter',
            /**
             * @event beforeitemmouseleave
             * @inheritdoc Ext.view.View#beforeitemmouseleave
             */
            'beforeitemmouseleave',
            /**
             * @event beforeitemclick
             * @inheritdoc Ext.view.View#beforeitemclick
             */
            'beforeitemclick',
            /**
             * @event beforeitemdblclick
             * @inheritdoc Ext.view.View#beforeitemdblclick
             */
            'beforeitemdblclick',
            /**
             * @event beforeitemcontextmenu
             * @inheritdoc Ext.view.View#beforeitemcontextmenu
             */
            'beforeitemcontextmenu',
            /**
             * @event itemmousedown
             * @inheritdoc Ext.view.View#itemmousedown
             */
            'itemmousedown',
            /**
             * @event itemmouseup
             * @inheritdoc Ext.view.View#itemmouseup
             */
            'itemmouseup',
            /**
             * @event itemmouseenter
             * @inheritdoc Ext.view.View#itemmouseenter
             */
            'itemmouseenter',
            /**
             * @event itemmouseleave
             * @inheritdoc Ext.view.View#itemmouseleave
             */
            'itemmouseleave',
            /**
             * @event itemclick
             * @inheritdoc Ext.view.View#itemclick
             */
            'itemclick',
            /**
             * @event itemdblclick
             * @inheritdoc Ext.view.View#itemdblclick
             */
            'itemdblclick',
            /**
             * @event itemcontextmenu
             * @inheritdoc Ext.view.View#itemcontextmenu
             */
            'itemcontextmenu',
            /**
             * @event beforecellclick
             * @inheritdoc Ext.view.Table#beforecellclick
             */
            'beforecellclick',
            /**
             * @event cellclick
             * @inheritdoc Ext.view.Table#cellclick
             */
            'cellclick',
            /**
             * @event beforecelldblclick
             * @inheritdoc Ext.view.Table#beforecelldblclick
             */
            'beforecelldblclick',
            /**
             * @event celldblclick
             * @inheritdoc Ext.view.Table#celldblclick
             */
            'celldblclick',
            /**
             * @event beforecellcontextmenu
             * @inheritdoc Ext.view.Table#beforecellcontextmenu
             */
            'beforecellcontextmenu',
            /**
             * @event cellcontextmenu
             * @inheritdoc Ext.view.Table#cellcontextmenu
             */
            'cellcontextmenu',
            /**
             * @event beforecellmousedown
             * @inheritdoc Ext.view.Table#beforecellmousedown
             */
            'beforecellmousedown',
            /**
             * @event cellmousedown
             * @inheritdoc Ext.view.Table#cellmousedown
             */
            'cellmousedown',
            /**
             * @event beforecellmouseup
             * @inheritdoc Ext.view.Table#beforecellmouseup
             */
            'beforecellmouseup',
            /**
             * @event cellmouseup
             * @inheritdoc Ext.view.Table#cellmouseup
             */
            'cellmouseup',
            /**
             * @event beforecellkeydown
             * @inheritdoc Ext.view.Table#beforecellkeydown
             */
            'beforecellkeydown',
            /**
             * @event cellkeydown
             * @inheritdoc Ext.view.Table#cellkeydown
             */
            'cellkeydown',
            /**
             * @event beforecontainermousedown
             * @inheritdoc Ext.view.View#beforecontainermousedown
             */
            'beforecontainermousedown',
            /**
             * @event beforecontainermouseup
             * @inheritdoc Ext.view.View#beforecontainermouseup
             */
            'beforecontainermouseup',
            /**
             * @event beforecontainermouseover
             * @inheritdoc Ext.view.View#beforecontainermouseover
             */
            'beforecontainermouseover',
            /**
             * @event beforecontainermouseout
             * @inheritdoc Ext.view.View#beforecontainermouseout
             */
            'beforecontainermouseout',
            /**
             * @event beforecontainerclick
             * @inheritdoc Ext.view.View#beforecontainerclick
             */
            'beforecontainerclick',
            /**
             * @event beforecontainerdblclick
             * @inheritdoc Ext.view.View#beforecontainerdblclick
             */
            'beforecontainerdblclick',
            /**
             * @event beforecontainercontextmenu
             * @inheritdoc Ext.view.View#beforecontainercontextmenu
             */
            'beforecontainercontextmenu',
            /**
             * @event containermouseup
             * @inheritdoc Ext.view.View#containermouseup
             */
            'containermouseup',
            /**
             * @event containermouseover
             * @inheritdoc Ext.view.View#containermouseover
             */
            'containermouseover',
            /**
             * @event containermouseout
             * @inheritdoc Ext.view.View#containermouseout
             */
            'containermouseout',
            /**
             * @event containerclick
             * @inheritdoc Ext.view.View#containerclick
             */
            'containerclick',
            /**
             * @event containerdblclick
             * @inheritdoc Ext.view.View#containerdblclick
             */
            'containerdblclick',
            /**
             * @event containercontextmenu
             * @inheritdoc Ext.view.View#containercontextmenu
             */
            'containercontextmenu',
            /**
             * @event selectionchange
             * @inheritdoc Ext.selection.Model#selectionchange
             */
            'selectionchange',
            /**
             * @event beforeselect
             * @inheritdoc Ext.selection.RowModel#beforeselect
             */
            'beforeselect',
            /**
             * @event select
             * @inheritdoc Ext.selection.RowModel#select
             */
            'select',
            /**
             * @event beforedeselect
             * @inheritdoc Ext.selection.RowModel#beforedeselect
             */
            'beforedeselect',
            /**
             * @event deselect
             * @inheritdoc Ext.selection.RowModel#deselect
             */
            'deselect'
        ]);

        me.callParent(arguments);
        me.addStateEvents(['columnresize', 'columnmove', 'columnhide', 'columnshow', 'sortchange', 'filterchange']);

        // If lockable, the headerCt is just a collection of Columns, not a Container
        if (!me.lockable && me.headerCt) {
            me.headerCt.on('afterlayout', me.onRestoreHorzScroll, me);
        }
    },

    // Private. Determine if there are any columns with a locked configuration option
    hasLockedColumns: function(columns) {
        var i,
            len,
            column;

        // In case they specified a config object with items...
        if (Ext.isObject(columns)) {
            columns = columns.items;
        }
        for (i = 0, len = columns.length; i < len; i++) {
            column = columns[i];
            if (!column.processed && column.locked) {
                return true;
            }
        }
    },

    relayHeaderCtEvents: function (headerCt) {
        this.relayEvents(headerCt, [
            /**
             * @event columnresize
             * @inheritdoc Ext.grid.header.Container#columnresize
             */
            'columnresize',
            /**
             * @event columnmove
             * @inheritdoc Ext.grid.header.Container#columnmove
             */
            'columnmove',
            /**
             * @event columnhide
             * @inheritdoc Ext.grid.header.Container#columnhide
             */
            'columnhide',
            /**
             * @event columnshow
             * @inheritdoc Ext.grid.header.Container#columnshow
             */
            'columnshow',
            /**
             * @event columnschanged
             * @inheritdoc Ext.grid.header.Container#columnschanged
             */
            'columnschanged',
            /**
             * @event sortchange
             * @inheritdoc Ext.grid.header.Container#sortchange
             */
            'sortchange',
            /**
             * @event headerclick
             * @inheritdoc Ext.grid.header.Container#headerclick
             */
            'headerclick',
            /**
             * @event headercontextmenu
             * @inheritdoc Ext.grid.header.Container#headercontextmenu
             */
            'headercontextmenu',
            /**
             * @event headertriggerclick
             * @inheritdoc Ext.grid.header.Container#headertriggerclick
             */
            'headertriggerclick'
        ]);
    },

    getState: function(){
        var me = this,
            state = me.callParent(),
            storeState = me.store.getState();

        state = me.addPropertyToState(state, 'columns', me.headerCt.getColumnsState());

        if (storeState) {
            state.storeState = storeState;
        }
        return state;
    },

    applyState: function(state) {
        var me = this,
            sorter = state.sort,
            storeState = state.storeState,
            store = me.store,
            columns = state.columns;

        delete state.columns;

        // Ensure superclass has applied *its* state.
        // AbstractComponent saves dimensions (and anchor/flex) plus collapsed state.
        me.callParent(arguments);

        if (columns) {
            me.headerCt.applyColumnsState(columns);
        }

        // Old stored sort state. Deprecated and will die out.
        if (sorter) {
            if (store.remoteSort) {
                // Pass false to prevent a sort from occurring
                store.sort({
                    property: sorter.property,
                    direction: sorter.direction,
                    root: sorter.root
                }, null, false);
            } else {
                store.sort(sorter.property, sorter.direction);
            }
        }
        // New storeState which encapsulates groupers, sorters and filters
        else if (storeState) {
            store.applyState(storeState);
        }
    },

    /**
     * Returns the store associated with this Panel.
     * @return {Ext.data.Store} The store
     */
    getStore: function(){
        return this.store;
    },

    /**
     * Gets the view for this panel.
     * @return {Ext.view.Table}
     */
    getView: function() {
        var me = this,
            sm;

        if (!me.view) {
            sm = me.getSelectionModel();

            // TableView injects the view reference into this grid so that we have a reference as early as possible
            Ext.widget(Ext.apply({

                // Features need a reference to the grid, so configure a reference into the View
                grid: me,
                deferInitialRefresh: me.deferRowRender !== false,
                trackOver: me.trackMouseOver !== false,
                scroll: me.scroll,
                xtype: me.viewType,
                store: me.store,
                headerCt: me.headerCt,
                columnLines: me.columnLines,
                rowLines: me.rowLines,
                selModel: sm,
                features: me.features,
                panel: me,
                emptyText: me.emptyText || ''
            }, me.viewConfig));

            // Normalize the application of the markup wrapping the emptyText config.
            // `emptyText` can now be defined on the grid as well as on its viewConfig, and this led to the emptyText not
            // having the wrapping markup when it was defined in the viewConfig. It should be backwards compatible.
            // Note that in the unlikely event that emptyText is defined on both the grid config and the viewConfig that the viewConfig wins.
            if (me.view.emptyText) {
                me.view.emptyText = '<div class="' + me.emptyCls + '">' + me.view.emptyText + '</div>';
            }

            // TableView's custom component layout, Ext.view.TableLayout requires a reference to the headerCt because it depends on the headerCt doing its work.
            me.view.getComponentLayout().headerCt = me.headerCt;

            me.mon(me.view, {
                uievent: me.processEvent,
                scope: me
            });
            sm.view = me.view;
            me.headerCt.view = me.view;
        }
        return me.view;
    },

    /**
     * @private
     * autoScroll is never valid for all classes which extend TablePanel.
     */
    setAutoScroll: Ext.emptyFn,

    /**
     * @private
     * Processes UI events from the view. Propagates them to whatever internal Components need to process them.
     * @param {String} type Event type, eg 'click'
     * @param {Ext.view.Table} view TableView Component
     * @param {HTMLElement} cell Cell HtmlElement the event took place within
     * @param {Number} recordIndex Index of the associated Store Model (-1 if none)
     * @param {Number} cellIndex Cell index within the row
     * @param {Ext.EventObject} e Original event
     */
    processEvent: function(type, view, cell, recordIndex, cellIndex, e, record, row) {
        var me = this,
            header;

        if (cellIndex !== -1) {
            header = me.columnManager.getColumns()[cellIndex];
            return header.processEvent.apply(header, arguments);
        }
    },

    /**
     * This method is obsolete in 4.1. The closest equivalent in
     * 4.1 is {@link #doLayout}, but it is also possible that no
     * layout is needed.
     * @deprecated 4.1
     */
    determineScrollbars: function () {
        //<debug>
        Ext.log.warn('Obsolete');
        //</debug>
    },

    /**
     * This method is obsolete in 4.1. The closest equivalent in 4.1 is
     * {@link Ext.AbstractComponent#updateLayout}, but it is also possible that no layout
     * is needed.
     * @deprecated 4.1
     */
    invalidateScroller: function () {
        //<debug>
        Ext.log.warn('Obsolete');
        //</debug>
    },

    scrollByDeltaY: function(yDelta, animate) {
        this.getView().scrollBy(0, yDelta, animate);
    },

    scrollByDeltaX: function(xDelta, animate) {
        this.getView().scrollBy(xDelta, 0, animate);
    },

    afterCollapse: function() {
        var me = this;
        me.saveScrollPos();
        me.saveScrollPos();
        me.callParent(arguments);
    },

    afterExpand: function() {
        var me = this;
        me.callParent(arguments);
        me.restoreScrollPos();
        me.restoreScrollPos();
    },

    saveScrollPos: Ext.emptyFn,

    restoreScrollPos: Ext.emptyFn,
    
    onHeaderResize: function(){
        this.delayScroll();
    },

    // Update the view when a header moves
    onHeaderMove: function(headerCt, header, colsToMove, fromIdx, toIdx) {
        var me = this;

        // If there are Features or Plugins which create DOM which must match column order, they set the optimizedColumnMove flag to false.
        // In this case we must refresh the view on column move.
        if (me.optimizedColumnMove === false) {
            me.view.refresh();
        }

        // Simplest case for default DOM structure is just to swap the columns round in the view.
        else {
            me.view.moveColumn(fromIdx, toIdx, colsToMove);
        }
        me.delayScroll();
    },

    // Section onHeaderHide is invoked after view.
    onHeaderHide: function(headerCt, header) {
        this.view.refresh();
        this.delayScroll();
    },

    onHeaderShow: function(headerCt, header) {
        this.view.refresh();
        this.delayScroll();
    },

    delayScroll: function(){
        var target = this.getScrollTarget().el;
        if (target) {
            this.scrollTask.delay(10, null, null, [target.dom.scrollLeft]);
        }
    },

    /**
     * @private
     * Fires the TablePanel's viewready event when the view declares that its internal DOM is ready
     */
    onViewReady: function() {
         this.fireEvent('viewready', this);   
    },

    /**
     * @private
     * Tracks when things happen to the view and preserves the horizontal scroll position.
     */
    onRestoreHorzScroll: function() {
        var left = this.scrollLeftPos;
        if (left) {
            // We need to restore the body scroll position here
            this.syncHorizontalScroll(left, true);
        }
    },

    getScrollerOwner: function() {
        var rootCmp = this;
        if (!this.scrollerOwner) {
            rootCmp = this.up('[scrollerOwner]');
        }
        return rootCmp;
    },

    /**
     * Gets left hand side marker for header resizing.
     * @private
     */
    getLhsMarker: function() {
        var me = this;
        return me.lhsMarker || (me.lhsMarker = Ext.DomHelper.append(me.el, {
            cls: me.resizeMarkerCls
        }, true));
    },

    /**
     * Gets right hand side marker for header resizing.
     * @private
     */
    getRhsMarker: function() {
        var me = this;

        return me.rhsMarker || (me.rhsMarker = Ext.DomHelper.append(me.el, {
            cls: me.resizeMarkerCls
        }, true));
    },

    /**
     * Returns the selection model being used and creates it via the configuration if it has not been created already.
     * @return {Ext.selection.Model} selModel
     */
    getSelectionModel: function(){
        var me = this,
            selModel = me.selModel,
            applyMode, mode, type;
        
        if (!selModel) {
            selModel = {};
            // no config, set our own mode
            applyMode = true;
        }

        if (!selModel.events) {
            // only config provided, set our mode if one doesn't exist on the config
            type = selModel.selType || me.selType;
            applyMode = !selModel.mode;
            selModel = me.selModel = Ext.create('selection.' + type, selModel);
        }

        if (me.simpleSelect) {
            mode = 'SIMPLE';
        } else if (me.multiSelect) {
            mode = 'MULTI';
        }

        Ext.applyIf(selModel, {
            allowDeselect: me.allowDeselect
        });
        
        if (mode && applyMode) {
            selModel.setSelectionMode(mode);
        }

        if (!selModel.hasRelaySetup) {
            me.relayEvents(selModel, [
                'selectionchange', 'beforeselect', 'beforedeselect', 'select', 'deselect'
            ]);
            selModel.hasRelaySetup = true;
        }

        // lock the selection model if user
        // has disabled selection
        if (me.disableSelection) {
            selModel.locked = true;
        }
        return selModel;
    },
    
    getScrollTarget: function(){
        var owner = this.getScrollerOwner(),
            items = owner.query('tableview');
            
        return items[1] || items[0];
    },

    onHorizontalScroll: function(event, target) {
        this.syncHorizontalScroll(target.scrollLeft);
    },
    
    syncHorizontalScroll: function(left, setBody) {
        var me = this,
            scrollTarget;
            
        setBody = setBody === true;
        // Only set the horizontal scroll if we've changed position,
        // so that we don't set this on vertical scrolls
        if (me.rendered && (setBody || left !== me.scrollLeftPos)) {
            // Only set the body position if we're reacting to a refresh, otherwise
            // we just need to set the header.
            if (setBody) {   
                scrollTarget = me.getScrollTarget();
                scrollTarget.el.dom.scrollLeft = left;
            }
            me.headerCt.el.dom.scrollLeft = left;
            me.scrollLeftPos = left;
        }
    },

    // template method meant to be overriden
    onStoreLoad: Ext.emptyFn,

    getEditorParent: function() {
        return this.body;
    },

    bindStore: function(store, initial) {
        var me = this,
            view = me.getView(),
            bufferedStore = store && store.buffered,
            bufferedRenderer;

        // Bind to store immediately because subsequent processing looks for grid's store property
        me.store = store;

        // If the Store is buffered, create a BufferedRenderer to monitor the View's scroll progress
        // and scroll rows on/off when it detects we are nearing an edge.
        // MUST be done before store is bound to the view so that the BufferedRenderer may inject its getViewRange implementation
        // before the view tries to refresh.
        bufferedRenderer = me.findPlugin('bufferedrenderer');
        if (bufferedRenderer) {
            me.verticalScroller = bufferedRenderer;
            // If we're in a reconfigure rebind the BufferedRenderer
            if (bufferedRenderer.store) {
                bufferedRenderer.bindStore(store);
            }
        } else if (bufferedStore) {
            me.verticalScroller = bufferedRenderer = me.addPlugin(Ext.apply({
                ptype: 'bufferedrenderer'
            }, me.initialConfig.verticalScroller));
        }

        if (view.store !== store) {
            if (initial) {
                // The initially created View will already be bound to the configured Store
                view.bindStore(store, false, 'dataSource');
            } else {
                // Otherwise, we're coming from a reconfigure, so we need to set the actual
                // store property on the view. It will set the data source
                view.bindStore(store, false);
            }
        }

        me.mon(store, {
            load: me.onStoreLoad,
            scope: me
        });
        me.storeRelayers = me.relayEvents(store, [
            /**
             * @event filterchange
             * @inheritdoc Ext.data.Store#filterchange
             */
            'filterchange'
        ]);

        // If buffered rendering is being used, scroll position must be preserved across refreshes
        if (bufferedRenderer) {
            me.invalidateScrollerOnRefresh = false;
        }

        if (me.invalidateScrollerOnRefresh !== undefined) {
            view.preserveScrollOnRefresh = !me.invalidateScrollerOnRefresh;
        }
    },

    unbindStore: function() {
        var me = this,
            store = me.store;

        if (store) {
            me.store = null;
            me.mun(store, {
                load: me.onStoreLoad,
                scope: me
            });
            Ext.destroy(me.storeRelayers);
        }
    },

    // documented on GridPanel
    reconfigure: function(store, columns) {
        var me = this,
            view = me.getView(),
            originalDeferinitialRefresh,
            oldStore = me.store,
            headerCt = me.headerCt,
            oldColumns = headerCt ? headerCt.items.getRange() : me.columns;

        // Make copy in case the beforereconfigure listener mutates it.
        if (columns) {
            columns = Ext.Array.slice(columns);
        }

        me.fireEvent('beforereconfigure', me, store, columns, oldStore, oldColumns);
        if (me.lockable) {
            me.reconfigureLockable(store, columns);
        } else {
            Ext.suspendLayouts();
            if (columns) {
                // new columns, delete scroll pos
                delete me.scrollLeftPos;
                headerCt.removeAll();
                headerCt.add(columns);
            }
            // The following test compares the result of an assignment of the store var with the oldStore var
            // This saves a large amount of code.
            if (store && (store = Ext.StoreManager.lookup(store)) !== oldStore) {
                // Only unbind the store if a new one was passed
                if (me.store) {
                    me.unbindStore();
                }

                // On reconfigure, view refresh must be inline.
                originalDeferinitialRefresh = view.deferInitialRefresh;
                view.deferInitialRefresh = false;
                me.bindStore(store);
                view.deferInitialRefresh = originalDeferinitialRefresh;
            } else {
                me.getView().refresh();
            }
            headerCt.setSortState();
            Ext.resumeLayouts(true);
        }
        me.fireEvent('reconfigure', me, store, columns, oldStore, oldColumns);
    },
    
    beforeDestroy: function(){
        var task = this.scrollTask;
        if (task) {
            task.cancel();
            this.scrollTask = null;
        }
        this.callParent();
    },
    
    onDestroy: function(){
        if (this.lockable) {
            this.destroyLockable();
        }
        this.callParent();
        
    }
});