Highchart工具提示问题

Question

In my current project we are using Hightchart to show charts for various analysis. In line chart we are showing tooltip on hover. when there are only two series(two lines) charts renders successfully and show tooltip when it exceeds from 2 then charts renders successfully but tooltip only getting displayed for intial two lines. How can i show tooltip for all the lines when it exceeds from 2. below the code snippet of plotOptions and series data.

  plotOptions: {
                area: {
                    fillOpacity:0.0001,
                    lineWidth: 2,
                    marker: {
                        enabled: false
                    },
                    shadow: false,
                    states: {
                        hover: {
                            lineWidth: 2
                        }                   
                    },                     
                    tooltip: {
                        headerFormat: '<span style="font-size:10px">{point.key}</span><br><table style="height:auto;width:300px;white-space:normal !important;overflow:auto">',
                        pointFormat: '<tr><td style="color:black;font-weight:normal;padding:2px;text-align: justify">{series.name}: </td>' +
                            '<td style="color:black;font-weight:normal;padding:0">{point.y}</td></tr>',
                        footerFormat: '</table>',
                        shared: true,
                        useHTML: true
                    },
                    threshold: null
                }
            }

below is series: data

[{"name":"Text1","type":"area","data":[[1262304000000,367],[1293840000000,0.1],[1325376000000,387],[1356998400000,397],[1388534400000,407]]},
{"name":"Text2","type":"area","data":[[1262304000000,272],[1293840000000,1.1],[1325376000000,292],[1356998400000,302],[1388534400000,312]]},
{"name":"Text3","type":"area","data":[[1262304000000,916],[1293840000000,2.1],[1325376000000,936],[1356998400000,946],[1388534400000,956]]},
{"name":"Text4","type":"area","data":[[1262304000000,546],[1293840000000,3.1],[1325376000000,566],[1356998400000,576],[1388534400000,586]]},
{"name":"Text5","type":"area","data":[[1262304000000,726],[1293840000000,4.1],[1325376000000,746],[1356998400000,756],[1388534400000,766]]},
{"name":"Text6","type":"area","data":[[1262304000000,774],[1293840000000,0.2],[1325376000000,794],[1356998400000,804],[1388534400000,814]]}] 

update: I further investigated and found it shows tooltip for all when we start mouse hover from either start or end point of line in the chart but it doesn't show tooltip if start hovering line anywhere apart from starte or end point

Answer 1

Do you mean something like this : http://jsfiddle.net/vr9B8/ ?

 tooltip: {
        formatter:function() {

            var len = this.series.chart.series.length - 1;
            if(len > 2)
                return 'content of tooltip';
            else
                return false;       
        }
    },