Highcharts Demo

author(s): Torstein Hønsi

HTML

<script src="http://code.highcharts.com/highcharts.js"></script>

<div id="container" style="height: 300px"></div>

JavaScript

$(function () {
    var chart = new Highcharts.Chart({
        chart: {
            renderTo: 'container',
            height: 500
        },
        xAxis: {
            categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
        },
        
        yAxis: [{
            min: -50,
            tickInterval: 500,
            startOnTick:false,
            endOnTick:false
        },{
            min: -50,
            opposite:true,
            tickInterval: 500,
            startOnTick:false,
            endOnTick:false
        }],
        
        series: [{
            data: [929.9, 971.5, 1106.4, 1129.2, 1144.0, 1176.0, 1135.6, 1148.5, 2216.4, 1194.1, 995.6, 954.4]        
        },{yAxis:1,
            data: [929.9, 971.5, 1106.4, 1129.2, 1144.0, 1176.0, 1135.6, 1148.5, 2216.4, 1194.1, 995.6, 954.4]        
        }]
    });
    var isDragging = false;
    //console.log("chart.plotLeft "+chart.plotLeft+" chart.plotRight "+chart.plotRight+" chart.plotbottom "+chart.plotBottom+" chart.plotTop "+chart.plotTop);
    var mouseY;
    $(chart.container)
    .mousedown(function(event) {
        mouseY=event.offsetY;
        yData=chart.yAxis[0].getExtremes();
        yDataRange=yData.max-yData.min;
        isDragging=true;
    })
    .mousemove(function(e) {
        var wasDragging = isDragging;
        if (wasDragging) {
            yVar=mouseY-e.pageY; 
           if(yVar<-20 || yVar > 20) {
               mouseY = e.pageY;
                yVarDelta=yVar/10*yDataRange;
               yVarDelta =  chart.yAxis[0].translate(e.pageY) - chart.yAxis[0].translate(e.pageY - yVarDelta);
                chart.yAxis[0].setExtremes((yData.min-yVarDelta),(yData.max-yVarDelta));
            }
        }
    })
    .mouseup(function (e) {
        isDragging = false;
    });
});