echarts 画流程图

先看效果图

标题

//渲染流程图
var drawForceChart = function(data){
    console.log('开始执行流程图');
    var forceOption = {
        tooltip: {},
        animationDurationUpdate: 1500,
        animationEasingUpdate: 'quinticInOut',
        textStyle: {
            color:'#000'
        },
        series : [
            {
                type: 'graph',
                tooltip: {
                    backgroundColor:'skyblue',
                },
                layout: 'none',
                symbolSize: 10,
                roam: false,
                label: {
                    normal: {
                        show: true,
                        position: 'b