Programmatically Draw Rect And Line In Highcharts With Zoom

I'm doing some programmatic drawing in Highcharts using Highcharts.Renderer using path() and rect(). In the code below I have manually plotted the coordinates for the line and rect

Solution 1:

Right now you are not really using your chart values - you are drawing your rect and path independently from your series. You can connect your drawings with your chart using your point y and x values and Axis.toPixels() method: http://api.highcharts.com/highcharts/Axis.toPixels

$(function() {
  var addRect = function(chart) {
    $('.rect').remove();
    var xAxis = chart.xAxis[0],
      yAxis = chart.yAxis[0]
    chart.renderer.rect(xAxis.toPixels(1), 110, xAxis.toPixels(2) - xAxis.toPixels(1), 100, 5)
      .attr({
        'stroke-width': 2,
        stroke: 'red',
        fill: 'transparent',
        zIndex: 0
      }).addClass('rect')
      .add();
    chart.renderer.rect(0, 0, chart.plotLeft, chart.chartHeight + chart.plotTop, 5)
      .attr({
        fill: 'white',
        zIndex: 0
      }).addClass('rect')
      .add();
  };
  $('#container').highcharts({
    chart: {
      zoomType: 'x',
      events: {
        redraw: function() {
          addRect(this);
        },
        load: function() {
          addRect(this);
        }
      }
    },
    xAxis: {
      categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
    },
    series: [{
      data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
    }]
  });
});

Here you can see an example how it can work: http://jsfiddle.net/n8ro1b9m/4/

Solution 2:

You can use the series.data values in your function by using:

chart.series[0].data[i].y

With i the number of the point in the series. Is that what you want to do ?