extjs多选下拉框

// vim: ts=4:sw=4:nu:fdc=4:nospell
/**//**
* Ext.ux.form.LovCombo, List of Values Combo
*
* @author    Ing. Jozef Sakáloš
* @copyright (c) 2008, by Ing. Jozef Sakáloš
* @date      16. April 2008
* @version   $Id: Ext.ux.form.LovCombo.js 285 2008-06-06 09:22:20Z jozo $
*
* @license Ext.ux.form.LovCombo.js is licensed under the terms of the Open Source
* LGPL 3.0 license. Commercial use is permitted to the extent that the 
* code/component(s) do NOT become part of another Open Source or Commercially
* licensed development library or toolkit without explicit permission.
* 
* License details: http://www.gnu.org/licenses/lgpl.html
*/

/**//*global Ext */

// add RegExp.escape if it has not been already added
if ('function' !== typeof RegExp.escape) ...{
    RegExp.escape = function(s) ...{
        if ('string' !== typeof s) ...{
            return s;
        }
        // Note: if pasting from forum, precede ]// with backslash manually
        return s.replace(/([.*+?^=!:${}()|[/]////])/g, '//$1');
    }; // eo function escape
}

// create namespace
Ext.ns('Ext.ux.form');

/**//**
*
* @class Ext.ux.form.LovCombo
* @extends Ext.form.ComboBox
*/
Ext.ux.form.LovCombo = Ext.extend(Ext.form.ComboBox, ...{

    // {{{
    // configuration options
    /**//**
    * @cfg {String} selectAllOn the value of the option used as 
    * the select-all / deselect-all trigger
    */
    selectAllOn: null,
    /**//**
    * @cfg {String} checkField name of field used to store checked state.
    * It is automatically added to existing fields.
    * Change it only if it collides with your normal field.
    */
    checkField: 'checked'

    /**//**
    * @cfg {String} separator separator to use between values and texts for getValue and submission
    */
    , separator: ','

    /**//**
    * @cfg {String} displaySeparator displaySeparator to use between values and texts for display
    */
    , displaySeparator: ','

    /**//**
    * @cfg {String/Array} tpl Template for items. 
    * Change it only if you know what you are doing.
    */
    // }}}
    // {{{
    , initComponent: function() ...{

        // template with checkbox
        if (!this.tpl) ...{
            this.tpl =
                 '<tpl for=".">'
                + '<li class="x-combo-list-item">'
                + '<img src="' + Ext.BLANK_IMAGE_URL + '" mce_src="' + Ext.BLANK_IMAGE_URL + '" '
                + 'class="ux-lovcombo-icon ux-lovcombo-icon-'
            //+'{[values.' + this.checkField + '?"checked":values.' + this.checkField + '===null?"mixed":"unchecked"' + ']}">'
                + '{[values.' + this.checkField + '?"checked":"unchecked"' + ']}">'
                + '<li class="ux-lovcombo-item-text">{' + (this.displayField || 'text') + '}</li>'
                + '</li>'
                + '</tpl>'
            ;
        }

        // call parent
        Ext.ux.form.LovCombo.superclass.initComponent.apply(this, arguments);

        // install internal event handlers
        this.on(...{
            scope: this
            , beforequery: this.onBeforeQuery
            //,blur:this.onRealBlur
        });

        // remove selection from input field
        this.onLoad = this.onLoad.createSequence(function() ...{
            if (this.el) ...{
                var v = this.el.dom.value;
                this.el.dom.value = '';
                this.el.dom.value = v;
            }
        });

    } // e/o function initComponent
    // }}}
    // {{{
    /**//**
    * Disables default tab key bahavior
    * @private
    */
    , initEvents: function() ...{
        Ext.ux.form.LovCombo.superclass.initEvents.apply(this, arguments);

        // disable default tab handling - does no good
        this.keyNav.tab = false;

    } // eo function initEvents
    // }}}
    // {{{
    /**//**
    * clears value
    */
    , clearValue: function() ...{
        this.value = '';
        this.setRawValue(this.value);
        this.store.clearFilter();
        this.store.each(function(r) ...{
            r.set(this.checkField, false);
        }, this);
        if (this.hiddenField) ...{
            this.hiddenField.value = '';
        }
        this.applyEmptyText();
    } // eo function clearValue
    // }}}
    // {{{
    /**//**
    * @return {String} separator (plus space) separated list of selected displayFields
    * @private
    */
    , getCheckedDisplay: function() ...{
        var re = new RegExp(RegExp.escape(this.separator), "g");
        return this.getCheckedValue(this.displayField).replace(re, RegExp.escape(this.displaySeparator) + ' ');
    } // eo function getCheckedDisplay
    // }}}
    // {{{
    /**//**
    * @return {String} separator separated list of selected valueFields
    * @private
    */
    , getCheckedValue: function(field) ...{
        field = field || this.valueField;
        var c = [];

        // store may be filtered so get all records
        var snapshot = this.store.snapshot || this.store.data;
        snapshot.each(function(r) ...标签：
extjs 下拉框