Try Dragging and change dataecharts 折线配置项内容和展示

完成第一次全曲线拖拽后，第二次拖拽的时候失效

      var symbolSize = 20;
var data = [['周一',11], ['周二',11], ['周三',15], ['周四',13], ['周五',12], ['周六',13], ['周日',10]];
var thisNode ;
option = {
    title: {
        text: 'Try Dragging these Points'
    },
    tooltip: {
        triggerOn: 'none',
    },
     xAxis:  {
        type: 'category',
        boundaryGap: false,
        data: ['周一','周二','周三','周四','周五','周六','周日']
    },
    yAxis: {
        type: 'value',
        axisLabel: {
            formatter: '{value} °C'
        }
    },
    series: [
        {
            name: 'a',
            type: 'line',
            smooth: true,
            symbolSize: symbolSize,
            data: data
        }
    ]
};


if (!app.inNode) {
    setTimeout(function () {
        // Add shadow circles (which is not visible) to enable drag.
        myChart.setOption({
            graphic: echarts.util.map(data, function (item, dataIndex) {
                return {
                    type: 'line',
                    position: myChart.convertToPixel({seriesName: 'a'}, item),
                    shape: {
                        cx: 0,
                        cy: 0,
                        r: symbolSize / 2
                    },
                    invisible: true,
                    draggable: true,
                    ondrag: echarts.util.curry(onPointDragging, dataIndex),
                    onmousemove: echarts.util.curry(showTooltip, dataIndex),
                    onmouseout: echarts.util.curry(hideTooltip, dataIndex),
                    z: 100
                };
            })
        });
    }, 0);

    window.addEventListener('resize', updatePosition);
}

myChart.on('dataZoom', updatePosition);

function updatePosition() {
    myChart.setOption({
        graphic: echarts.util.map(data, function (item, dataIndex) {
            return {
                position: myChart.convertToPixel({seriesName: 'a'}, item)
            };
        })
    });
}

function showTooltip(dataIndex) {
    myChart.dispatchAction({
        type: 'showTip',
        seriesIndex: 0,
        dataIndex: dataIndex
    });
}

function hideTooltip(dataIndex) {
    myChart.dispatchAction({
        type: 'hideTip'
    });
}

function onPointDragging(dataIndex, dx, dy) {
    convert = myChart.convertFromPixel('grid', this.position);
    thisNode = convert[0];
    data[thisNode] = convert;
    // Update data
    myChart.setOption({
        series: [{
            name: 'a',
            data: data
        }]
    });
}