/*
 * selectToDo - jQuery plugin for select checkbox
 *
 * Copyright (c) 2014 Elric Huang
 *
 * Licensed under the MIT license:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Project home:
 *   https://github.com/elrichuang/jquery.selectToDo.js
 *
 * Version:  0.1.3
 *
 */
;(function ($){
    $.fn.selectToDo = function (options){
        var settings = $.extend({},{
            "selectAllButton"    : $("#selectAll"),
            "selectNoneButton"   : $("#selectNone"),
            "selectInvertButton" : $("#selectInv"),
        }, options);
         
        var element = this;
         
        $(settings.selectAllButton).bind("click",function(){
            element.selectAll();
        });
        $(settings.selectNoneButton).bind("click",function(){
            element.selectNone();
        });
        $(settings.selectInvertButton).bind("click",function(){
            element.selectInvert();
        });
         
        this.selectAll = function(){//全选
            element.prop('checked', true);
        };
         
        this.selectNone = function(){//全不选
            element.prop('checked', false);
        };
         
        this.selectInvert = function(){//反选
            element.each(function(){
                if(this.checked){
                    $(this).prop('checked', false);
                }else{
                    $(this).prop('checked', true);
                }
            });
        };
         
        this.result = function(){
            var checkVal=[];
            element.each(function(){
                if(this.checked){
                    checkVal.push($(this).val());
                }
            });
            if(checkVal.length > 0)
            {
                // 引用回调函数
                return checkVal.join(",");
            }else{
                return null;
            }
        };
         
        return this;
    };
})(jQuery);