Home forums Using CanvasJS Multi-dataPoints on bar Chart Draggable Reply To: Multi-dataPoints on bar Chart Draggable

#22770

Please find the complete code. Please suggest the solution for the same.

<!DOCTYPE html>
<html>
<head>
<meta charset=”UTF-8″ />
<meta http-equiv=”X-UA-Compatible” content=”IE=edge,chrome=1″>
<meta name=”viewport” content=”width=device-width, initial-scale=1.0″>
<title>Bar Chart by Canvas JS</title>

<link rel=”stylesheet” type=”text/css” href=”css/bootstrap.min.css”>
<style>
.canvasjs-chart-credit{display:none !important;}
.row > div{margin-top:20px;}
</style>
</head>
<body class=”container”>
<div class=”row”>

<div class=”col-xs-12 text-center”>
<div class=”col-xs-6″>
<input type=”button” id=”renderLineGraph” value=”Click to generate Line graph” class=”btn btn-default btn-primary”>
</div>
<div class=”col-xs-6″>
<input type=”button” id=”renderBarGraph” value=”Click to generate Bar graph” class=”btn btn-default btn-success”>
</div>
</div>

<div class=”col-xs-12 text-center”>
<div class=”col-xs-12″>
<div class=”sectionFirst”>
<h1>Bar Chart by Canvas JS</h1>
X Value:<input id=”xValue” type=”number” step=”any” placeholder=”Enter X-Value”><br>
Y Value:<input id=”yValue” type=”number” step=”any” placeholder=”Enter Y-Value”><br>
<button id=”renderButton”>Add DataPoint & Render</button>

<div id=”lineGraphContainer” style=”width:500px; height: 400px;”></div>
</div>
</div>
<div class=”col-xs-12″>
<div class=”sectionSecond”>
<div id=”barChartContainer” style=”width:100%; height: 520px;”></div>
</div>
</div>
</div>

</div>

<!– All scripts placed here –>
<script src=”https://canvasjs.com/assets/script/canvasjs.min.js”></script>
<script src=”https://code.jquery.com/jquery-3.1.1.min.js”></script>
<script src=”js/bootstrap.min.js” type=”text/javascript”></script>
<script src=”js/lineChart.js” type=”text/javascript”></script>
<script src=”js/barchart.js” type=”text/javascript”></script>
<script>
$(document).ready(function(){
$(“.sectionFirst, .sectionSecond”).hide();

$(“#renderLineGraph”).on(“click”, function(){
$(“.sectionFirst”).show();
$(“.sectionSecond”).hide();
});
$(“#renderBarGraph”).on(“click”, function(){
$(“.sectionSecond”).show();
$(“.sectionFirst”).hide();
});
});
</script>

</body>
</html>

<!– barchart.js –>
window.onload = function() {

var chart = new CanvasJS.Chart(“barChartContainer”,
{
theme: “light2”, // theme can changed to: “light1″,”light2”, “dark1”, “dark2”
animationEnabled: true,
axisX:{
minimum: 5, // x-axis minimum value
maximum: 100, // x-axis maximum value
labelAngle: 45,
prefix: “$”, // Prefix
suffix: “K” // Suffix
},
axisY:{
minimum: 5, // y-axis minimum value
maximum: 100, // y-axis maximum value
labelAngle: 45,
prefix: “$”, // Prefix
suffix: “K”, // Suffix
interlacedColor: “#F0F8FF”
},
title: {
text: “Draggable bar graphs”, // title over the graph
fontSize: 20,
fontWeight: “bold”,
fontColor: “#000”,
fontFamily: “tahoma”,
padding: 10
},
subtitles:[
{
text: “Blue is draggable”,
fontSize: 14,
fontWeight: “normal”,
fontColor: “blue”
}
],
legend: {
cursor: “pointer”,
itemclick: function (e) { // Show/Hide legends on click
if (typeof (e.dataSeries.visible) === “undefined” || e.dataSeries.visible) {
e.dataSeries.visible = false;
} else {
e.dataSeries.visible = true;
}

e.chart.render();
}
},
data: [
{ // dataSeries 1
type: “column”, // type can be changed to: “line”,“column”,“bar”,“area”,“spline”,“pie”,“doughnut”
name: “Option First”,
showInLegend: true,
dataPoints: [ // data points set 1
{ 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 }
]
},
{ // dataSeries 2
type: “column”, // type can be changed to: “line”,“column”,“bar”,“area”,“spline”,“pie”,“doughnut”
name: “Option Second”,
showInLegend: true,
dataPoints: [ // data points set 2
{ x: 10, y: 78 },
{ x: 20, y: 42 },
{ x: 30, y: 86 },
{ x: 40, y: 25 },
{ x: 50, y: 78 },
{ x: 60, y: 96 },
{ x: 70, y: 36 },
{ x: 80, y: 45 },
{ x: 90, y: 20 }
]
}
]
});

var dataPointWidth = 1;

chart.render();

var xSnapDistance = chart.axisX[0].convertPixelToValue(chart.get(“dataPointWidth”)) / 2;
var ySnapDistance = 3;

var xValue, yValue;

var mouseDown = false;
var selected = null;
var changeCursor = false;

var timerId = null;

function getPosition(e) {
var parentOffset = $(“#barChartContainer .canvasjs-chart-container”).offset();
var relX = e.pageX – parentOffset.left;
var relY = e.pageY – parentOffset.top;
xValue = Math.round(chart.axisX[0].convertPixelToValue(relX));
yValue = Math.round(chart.axisY[0].convertPixelToValue(relY));
}

function searchDataPoint() {
var dps = chart.data[0].dataPoints;
for(var i = 0; i < dps.length; i++ ) {
if( (xValue >= dps[i].x – xSnapDistance && xValue <= dps[i].x + xSnapDistance) && (yValue >= dps[i].y – ySnapDistance && yValue <= dps[i].y + ySnapDistance) )
{
if(mouseDown) {
selected = i;
break;
} else {
changeCursor = true;
break;
}
} else {
selected = null;
changeCursor = false;
}
}
}

jQuery(“#barChartContainer > .canvasjs-chart-container”).on({
mousedown: function(e) {
mouseDown = true;
getPosition(e);
searchDataPoint();
},
mousemove: function(e) {
getPosition(e);
if(mouseDown) {
clearTimeout(timerId);
timerId = setTimeout(function(){
if(selected != null) {
chart.data[0].dataPoints[selected].y = yValue;
chart.render();
}
}, 0);
}
else {
searchDataPoint();
if(changeCursor) {
chart.data[0].set(“cursor”, “n-resize”);
} else {
chart.data[0].set(“cursor”, “default”);
}
}
},
mouseup: function(e) {
if(selected != null) {
chart.data[0].dataPoints[selected].y = yValue;
chart.render();
mouseDown = false;
}
}
});

}