    Ext.ns('Ext.ux.form');

    /**
     * @class Ext.ux.form.SelectBox
     * @extends Ext.form.ComboBox
     * Makes a ComboBox more closely mimic an HTML SELECT.  Supports clicking and dragging
     * through the list, with item selection occurring when the mouse button is released.
     * When used will automatically set {@link #editable} to false and call {@link Ext.Element#unselectable}
     * on inner elements.  Re-enabling editable after calling this will NOT work.
     * @author Corey Gilmore http://extjs.com/forum/showthread.php?t=6392
     * @history 2007-07-08 jvs
     * Slight mods for Ext 2.0
     * @xtype selectbox
     */
    Ext.ux.form.SelectBox = Ext.extend(Ext.form.ComboBox, {
        constructor: function(config){
            this.searchResetDelay = 1000;
            config = config || {};
            config = Ext.apply(config || {}, {
                editable: false,
                forceSelection: true,
                rowHeight: false,
                lastSearchTerm: false,
                triggerAction: 'all',
                mode: 'local'
            });

            Ext.ux.form.SelectBox.superclass.constructor.apply(this, arguments);

            this.lastSelectedIndex = this.selectedIndex || 0;
        },

        initEvents : function(){
            Ext.ux.form.SelectBox.superclass.initEvents.apply(this, arguments);
            // you need to use keypress to capture upper/lower case and shift+key, but it doesn't work in IE
            this.el.on('keydown', this.keySearch, this, true);
            this.cshTask = new Ext.util.DelayedTask(this.clearSearchHistory, this);
        },

        keySearch : function(e, target, options) {
            var raw = e.getKey();
            var key = String.fromCharCode(raw);
            var startIndex = 0;

            if( !this.store.getCount() ) {
                return;
            }

            switch(raw) {
                case Ext.EventObject.HOME:
                    e.stopEvent();
                    this.selectFirst();
                    return;

                case Ext.EventObject.END:
                    e.stopEvent();
                    this.selectLast();
                    return;

                case Ext.EventObject.PAGEDOWN:
                    this.selectNextPage();
                    e.stopEvent();
                    return;

                case Ext.EventObject.PAGEUP:
                    this.selectPrevPage();
                    e.stopEvent();
                    return;
            }

            // skip special keys other than the shift key
            if( (e.hasModifier() && !e.shiftKey) || e.isNavKeyPress() || e.isSpecialKey() ) {
                return;
            }
            if( this.lastSearchTerm == key ) {
                startIndex = this.lastSelectedIndex;
            }
            this.search(this.displayField, key, startIndex);
            this.cshTask.delay(this.searchResetDelay);
        },

        onRender : function(ct, position) {
            this.store.on('load', this.calcRowsPerPage, this);
            Ext.ux.form.SelectBox.superclass.onRender.apply(this, arguments);
            if( this.mode == 'local' ) {
                this.initList();
                this.calcRowsPerPage();
            }
        },

        onSelect : function(record, index, skipCollapse){
            if(this.fireEvent('beforeselect', this, record, index) !== false){
                this.setValue(record.data[this.valueField || this.displayField]);
                if( !skipCollapse ) {
                    this.collapse();
                }
                this.lastSelectedIndex = index + 1;
                this.fireEvent('select', this, record, index);
            }
        },

        afterRender : function() {
            Ext.ux.form.SelectBox.superclass.afterRender.apply(this, arguments);
            if(Ext.isWebKit) {
                this.el.swallowEvent('mousedown', true);
            }
            this.el.unselectable();
            this.innerList.unselectable();
            this.trigger.unselectable();
            this.innerList.on('mouseup', function(e, target, options) {
                if( target.id && target.id == this.innerList.id ) {
                    return;
                }
                this.onViewClick();
            }, this);

            this.innerList.on('mouseover', function(e, target, options) {
                if( target.id && target.id == this.innerList.id ) {
                    return;
                }
                this.lastSelectedIndex = this.view.getSelectedIndexes()[0] + 1;
                this.cshTask.delay(this.searchResetDelay);
            }, this);

            this.trigger.un('click', this.onTriggerClick, this);
            this.trigger.on('mousedown', function(e, target, options) {
                e.preventDefault();
                this.onTriggerClick();
            }, this);

            this.on('collapse', function(e, target, options) {
                Ext.getDoc().un('mouseup', this.collapseIf, this);
            }, this, true);

            this.on('expand', function(e, target, options) {
                Ext.getDoc().on('mouseup', this.collapseIf, this);
            }, this, true);
        },

        clearSearchHistory : function() {
            this.lastSelectedIndex = 0;
            this.lastSearchTerm = false;
        },

        selectFirst : function() {
            this.focusAndSelect(this.store.data.first());
        },

        selectLast : function() {
            this.focusAndSelect(this.store.data.last());
        },

        selectPrevPage : function() {
            if( !this.rowHeight ) {
                return;
            }
            var index = Math.max(this.selectedIndex-this.rowsPerPage, 0);
            this.focusAndSelect(this.store.getAt(index));
        },

        selectNextPage : function() {
            if( !this.rowHeight ) {
                return;
            }
            var index = Math.min(this.selectedIndex+this.rowsPerPage, this.store.getCount() - 1);
            this.focusAndSelect(this.store.getAt(index));
        },

        search : function(field, value, startIndex) {
            field = field || this.displayField;
            this.lastSearchTerm = value;
            var index = this.store.find.apply(this.store, arguments);
            if( index !== -1 ) {
                this.focusAndSelect(index);
            }
        },

        focusAndSelect : function(record) {
            var index = Ext.isNumber(record) ? record : this.store.indexOf(record);
            this.select(index, this.isExpanded());
            this.onSelect(this.store.getAt(index), index, this.isExpanded());
        },

        calcRowsPerPage : function() {
            if( this.store.getCount() ) {
                this.rowHeight = Ext.fly(this.view.getNode(0)).getHeight();
                this.rowsPerPage = this.maxHeight / this.rowHeight;
            } else {
                this.rowHeight = false;
            }
        }

    });

    Ext.reg('selectbox', Ext.ux.form.SelectBox);

    //backwards compat
    Ext.ux.SelectBox = Ext.ux.form.SelectBox;