Home forums Using CanvasJS Multi-dataPoints on bar Chart Draggable

This topic contains 6 replies, has 2 voices, and was last updated by  Priyanka M S 2 weeks ago.

Viewing 7 posts - 1 through 7 (of 7 total)
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  • #22756

    Hi,

    I’m stuck with draggable option in multi data bar chart. First bar chart is draggable, but second wasn’t. Please suggest.

    Sourabh

    #22761

    Priyanka M S
    Member

    Sourabh,

    Can you kindly share a jsfiddle reproducing the issue you are facing, so that we can look into your code, understand the scenario better and help you out?

    __
    Priyanka M S
    Team CanvasJS

    #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;
    }
    }
    });

    }

    #22774

    There’re two bars in the bar chart, but only one is draggable at a time.

    First bar is draggable when “0” is passed in “data[0]” and Second bar is draggable when “1” is passed in “data[1]”.

    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;
    }
    }
    });

    #22800

    Priyanka M S
    Member

    @sourabh Singh,

    We are looking into it and will get back to you at the earliest.

    __
    Priyanka M S
    Team CanvasJS

    #22888

    Waiting for the solution of the proposed problem.

    #22920

    Priyanka M S
    Member

    @sourabh Singh,

    Please take a look at this jsfiddle.

    __
    Priyanka M S
    Team CanvasJS

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