如何运用echarts dispatchaction功能

[shenmegui9]

看ng-echarts.js并没有封装dispatchaction功能，我修改了之后可以用，但每次跳index都会刷新chart使得浏览器自动关闭，而不是像官网的dispatch demo并没有刷新chart。
请问可以怎样改呢？

/**

• Created by liekkas.zeng on 2015/1/7.
  */
  angular.module('ng-echarts',[])
  .directive('ngEcharts',[function(){
  return {
  link: function(scope,element,attrs,ctrl,$window){
  function refreshChart(){
  var theme = (scope.config && scope.config.theme)
  ? scope.config.theme : 'default';
  var chart = echarts.init(element[0],theme);
  var app = {};

               if(scope.config && scope.config.dataLoaded === false){
                   chart.showLoading();
               }
  
               if(scope.config && scope.config.dataLoaded){
                   chart.setOption(scope.option);
                   chart.resize();
                   chart.hideLoading();
               }
  
               if(scope.config && scope.config.event){
                   if(angular.isArray(scope.config.event)){
                       angular.forEach(scope.config.event,function(value,key){
                           for(var e in value){
                               chart.on(e,value[e]);
                           }
                       });
                   }
               }
  

// chart.dispatchAction({
// type: 'downplay',
// seriesIndex: 0,
// dataIndex: scope.currentIndex;
// });

                if(angular.isDefined(scope.currentIndex)){
                	
                	chart.dispatchAction({
    			        type: 'highlight',
    			        seriesIndex: 0,
    			        dataIndex: scope.currentIndex
    			    });
    			    
                    chart.dispatchAction({
    			        type: 'showTip',
    			        seriesIndex: 0,
    			        dataIndex: scope.currentIndex
    			    });                        	
                }                                     
            };

            scope.$watch(
                function () { return scope.config; },
                function (value) {if (value) {refreshChart();                  
                }},
                true
            );


            scope.$watch(
                function () { return scope.option; },
                function (value) {if (value) {refreshChart();
               
                }},
                true
            );
            scope.$watch(
                    function () { return scope.currentIndex; },
                    function (value) {if (value) {refreshChart();
                   
                    }},
                    true
                );

// scope.$watch(
// function () { return scope.windowSize; },
// function (value) {
// console.log("directive watch window size");
// if (value) {refreshChart();
//
// }},
// true
// );

        },
        scope:{
            option:'=ecOption',
            config:'=ecConfig',
            currentIndex: '=ecCurrentIndex'
           // windowSize: '=ecWindowSize'
        },
        restrict:'EA'
    }
}]);