Chart with Editable Legend Items - CanvasJS JavaScript Charts

Chart with Editable Legend Items - 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>
<input id="legendEditor"/>

JavaScript

$("#legendEditor").hide();
var chart = new CanvasJS.Chart("chartContainer", {
  theme: "light2",
  title: {
    text: "Chart with Editable Legend"
  },
  subtitles: [{
    text: "Click on Legend to Edit"
  }],
  data: [{        
    type: "line",
    showInLegend: true,
    dataPoints: [
      { x: 10, y: 21 },
      { x: 20, y: 25 },
      { x: 30, y: 20 },
      { x: 40, y: 25 },
      { x: 50, y: 27 },
      { x: 60, y: 28 },
      { x: 70, y: 28 },
      { x: 80, y: 24 },
      { x: 90, y: 26 }
    ]
  },{        
    type: "line",
    showInLegend: true,
    dataPoints: [
      { x: 10, y: 31 },
      { x: 20, y: 35 },
      { x: 30, y: 30 },
      { x: 40, y: 35 },
      { x: 50, y: 35 },
      { x: 60, y: 38 },
      { x: 70, y: 38 },
      { x: 80, y: 34 },
      { x: 90, y: 44 }
    ]
  },{        
    type: "line",
    showInLegend: true,
    dataPoints: [
      { x: 10, y: 45 },
      { x: 20, y: 50 },
      { x: 30, y: 40 },
      { x: 40, y: 45 },
      { x: 50, y: 45 },
      { x: 60, y: 48 },
      { x: 70, y: 43 },
      { x: 80, y: 41 },
      { x: 90, y: 28 }
    ]
  },{        
    type: "line",
    showInLegend: true,
    dataPoints: [
      { x: 10, y: 71 },
      { x: 20, y: 55 },
      { x: 30, y: 50 },
      { x: 40, y: 65 },
      { x: 50, y: 95 },
      { x: 60, y: 68 },
      { x: 70, y: 28 },
      { x: 80, y: 34 },
      { x: 90, y: 14 }
    ]
  }]
});

chart.render();

var itemIndex = null;
var offset = $("#chartContainer").offset();

$("#chartContainer").click(function(e) {	
  if(e.offsetX >= chart.legend.bounds.x1 && e.offsetX <= chart.legend.bounds.x2 && e.offsetY >= chart.legend.bounds.y1 && e.offsetY <= chart.legend.bounds.y2){
    for(var i = 0; i < chart.legend.items.length; i++){
      if(e.offsetX >= chart.legend.items[i].x1 && e.offsetX <= chart.legend.items[i].x2 && e.offsetY >= chart.legend.items[i].y1 && e.offsetY <= chart.legend.items[i].y2){
        itemIndex = i;
      }
    }

    if(itemIndex !== null) {
     ...