    /**
     * An internally used DataView for {@link Ext.form.field.ComboBox ComboBox}.
     */
    Ext.define('Ext.view.BoundList', {
        extend: 'Ext.view.View',
        alias: 'widget.boundlist',
        alternateClassName: 'Ext.BoundList',
        requires: ['Ext.layout.component.BoundList', 'Ext.toolbar.Paging'],

        /**
         * @cfg {Number} pageSize
         * If greater than `0`, a {@link Ext.toolbar.Paging} is displayed at the bottom of the list and store
         * queries will execute with page {@link Ext.data.Operation#start start} and
         * {@link Ext.data.Operation#limit limit} parameters. Defaults to `0`.
         */
        pageSize: 0,

        /**
         * @property {Ext.toolbar.Paging} pagingToolbar
         * A reference to the PagingToolbar instance in this view. Only populated if {@link #pageSize} is greater
         * than zero and the BoundList has been rendered.
         */

        // private overrides
        autoScroll: true,
        baseCls: Ext.baseCSSPrefix + 'boundlist',
        itemCls: Ext.baseCSSPrefix + 'boundlist-item',
        listItemCls: '',
        shadow: false,
        trackOver: true,
        refreshed: 0,

        ariaRole: 'listbox',

        componentLayout: 'boundlist',

        renderTpl: ['<div id="{id}-listEl" class="list-ct"></div>'],

        initComponent: function() {
            var me = this,
                baseCls = me.baseCls,
                itemCls = me.itemCls;

            me.selectedItemCls = baseCls + '-selected';
            me.overItemCls = baseCls + '-item-over';
            me.itemSelector = "." + itemCls;

            if (me.floating) {
                me.addCls(baseCls + '-floating');
            }

            if (!me.tpl) {
                // should be setting aria-posinset based on entire set of data
                // not filtered set
                me.tpl = Ext.create('Ext.XTemplate',
                    '<ul><tpl for=".">',
                        '<li role="option" class="' + itemCls + '">' + me.getInnerTpl(me.displayField) + '</li>',
                    '</tpl></ul>'
                );
            } else if (Ext.isString(me.tpl)) {
                me.tpl = Ext.create('Ext.XTemplate', me.tpl);
            }

            if (me.pageSize) {
                me.pagingToolbar = me.createPagingToolbar();
            }

            me.callParent();

            me.addChildEls('listEl');
        },

        createPagingToolbar: function() {
            return Ext.widget('pagingtoolbar', {
                pageSize: this.pageSize,
                store: this.store,
                border: false
            });
        },

        onRender: function() {
            var me = this,
                toolbar = me.pagingToolbar;
            me.callParent(arguments);
            if (toolbar) {
                toolbar.render(me.el);
            }
        },

        bindStore : function(store, initial) {
            var me = this,
                toolbar = me.pagingToolbar;
            me.callParent(arguments);
            if (toolbar) {
                toolbar.bindStore(store, initial);
            }
        },

        getTargetEl: function() {
            return this.listEl || this.el;
        },

        getInnerTpl: function(displayField) {
            return '{' + displayField + '}';
        },

        refresh: function() {
            var me = this;
            me.callParent();
            if (me.isVisible()) {
                me.refreshed++;
                me.doComponentLayout();
                me.refreshed--;
            }
        },

        initAria: function() {
            this.callParent();

            var selModel = this.getSelectionModel(),
                mode     = selModel.getSelectionMode(),
                actionEl = this.getActionEl();

            // TODO: subscribe to mode changes or allow the selModel to manipulate this attribute.
            if (mode !== 'SINGLE') {
                actionEl.dom.setAttribute('aria-multiselectable', true);
            }
        },

        onDestroy: function() {
            Ext.destroyMembers(this, 'pagingToolbar', 'listEl');
            this.callParent();
        }
    });