Add Stripline Dynamically on Clicking over the Chart and allow Dragging it | CanvasJS JavaScript Charts

Add Stripline Dynamically on Clicking over the Chart and allow Dragging it | CanvasJS JavaScript Charts

by canvasjs

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<br/><!-- Just so that JSFiddle's Result label doesn't overlap the Chart -->
<div id="chartContainer" style="height: 360px; width: 100%;"></div>

JavaScript

var selected = -1;
var chart = new CanvasJS.Chart("chartContainer", {
  theme: "light2",
  title: {
    text: "Stacked Column Chart with Draggable stripLines"
  },
  axisX: [{
    stripLines: [{
      value: 15,
      showOnTop: true,
      thickness: 2,
      color: "#9999fd",
      lineDashType: "dash"
    }]
  }],
  data: [{
    type: "stackedColumn",
    color: "#343434",
    dataPoints: [
      { x: 10, y: 71 },
      { x: 20, y: 55 }
    ]
  },{
    type: "stackedColumn",
    color: "#006699",
    dataPoints: [
      { x: 10, y: 68 },
      { x: 20, y: 50 }
    ]
  },{
    type: "stackedColumn",
    color: "#099",
    dataPoints: [
      { x: 10, y: 35 },
      { x: 20, y: 95 }
    ]
  }]
});

chart.render();

$(".canvasjs-chart-canvas").last().on("mousedown", function(e) {
  // Get the selected stripLine & change the cursor
  var parentOffset = $(this).parent().offset();
  var relX = e.pageX - parentOffset.left;
  var relY = e.pageY - parentOffset.top;
  var snapDistance = 5;

  for(var i = 0; i < chart.options.axisX[0].stripLines.length; i++) {
    if(relX > chart.axisX[0].stripLines[i].get("bounds").x1 - snapDistance && relX < chart.axisX[0].stripLines[i].get("bounds").x2 + snapDistance && relY > chart.axisX[0].stripLines[i].get("bounds").y1 && relY < chart.axisX[0].stripLines[i].get("bounds").y2) {
      selected = i;
      $(this).css("cursor","pointer");
    }
  }
});

$(".canvasjs-chart-canvas").last().on("mousemove", function(e) {
  var parentOffset = $(this).parent().offset();
  var relX = e.pageX - parentOffset.left;
  var relY = e.pageY - parentOffset.top;
  var snapDistance = 5;
  // Move the selected stripLine
  if(selected !== -1) {    
    chart.options.axisX[0].stripLines[selected].value = chart.axisX[0].convertPixelToValue(relX);    
    chart.render();
  }
  for(var i = 0; i < chart.options.axisX[0].stripLines.length; i++) {
    if(relX > chart.axisX[0].stripLines[i].get("bounds").x1 - snapDistance && relX <...