EChart系列：在echart3中使用百度地图扩展之后，如何获取到百度地图对象

var ecModel = myChart._model;
var bmap = null;
ecModel.eachComponent(‘bmap‘, function (bmapModel) {			
	if(bmap == null){
		 bmap = bmapModel.__bmap;
	}
});

var pt = bmap.pixelToPoint({
	x: 800,
	y: 500
});
var pix = bmap.pointToPixel({
	lng: 114.31,
	lat: 30.52
});
alert(‘lng:‘ + pt.lng + ‘, lag: ‘ + pt.lat);
alert(‘武汉的坐标： x:‘ + pix.x + ‘, y: ‘ + pix.y);
bmap.addEventListener("dragend",function(){
	alert(‘缩放等级:‘ + bmap.getZoom());
});
bmap.addEventListener("moveend",function(){
	alert(‘缩放等级:‘ + bmap.getZoom());
});