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javascriptchartsdojoaxis-labels

Dojo Chart selective labels for x-axis & grid


I need to create a dojo chart

http://codebins.com/bin/4ldqp8z/1

In the above link my chart has x-axis labels like

Current x-axis: 11:am, 12:40pm, 2:20pm & 4pm

for the same labels i have grid lines.

Now the requirement is i just need 3 labels

Required x-axis: 10am, 1pm & 4pm

chart shows data between 9:30 pm to 4 pm with 10 minutes interval.

here is working sample :- http://codebins.com/bin/4ldqp8z/1

here is code :- you need to run it on http

<html>

    <head>
        <meta content="text/html; charset=UTF-8" http-equiv="content-type">
        <title>Code Bins</title>
                            <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/dojo/1.7.2/dojo/dojo.js" ></script>


    </head>

    <body Body Params>
        <div id="chart1" style="width:300px;height:200px">
</div>    </body>
                        <script type="text/javascript">
                    require(["dojo/_base/declare", "dojo/dom-style", "dojo/ready", "dojox/charting/Chart",  "dojox/charting/action2d/PlotAction", "dojox/charting/axis2d/Default", "dojox/charting/plot2d/Columns", "dojox/charting/plot2d/Lines", "dojox/charting/plot2d/Grid"], function(declare, domStyle, ready, Chart, PlotAction, Default, Columns, Lines, Grid) {

    ready(function() {
        var chart = new Chart("chart1")
            .addAxis("y", { vertical: true, 
                fixLower: "major", 
                fixUpper: "major", 
                leftBottom: false,
                majorTicks:false,
                minorTicks:false,
                stroke: {color:"#FFF",width:0},
                majorTick:{length:0}})
            .addAxis("x", {
                labels: labels, /* Lables are coming from here*/
                majorTicks:false,
                majorTick:{length:4,color:"#FFFFFF"},
                majorLabels:true,
                majorTickStep:10,
                minorTicks:false,
                max:40,
                stroke: {color:"#CFCFCF",width:"1"}})
            .addSeries("y", close, {  fill: "#EBEBEB"})
            .addPlot("Grid", {
                    type: "Grid",
                    markers: true
                });

        chart.render();
    });
});

var close = [];
for (var i = 0; i < 40; i++) { close.push(parseInt((Math.random() * 100) + 1200)); }
var labels = [{value: 1,text: "9:30am"},
{value: 2,text: "9:40am"},{value: 3,text: "9:50am"},{value: 4,text: "10am"},{value: 5,text: "10:10am"},{value: 6,text: "10:20am"},{value: 7,text: "10:30am"},{value: 8,text: "10:40am"},{value: 9,text: "10:50am"},{value: 10,text: "11am"},{value: 11,text: "11:10am"},{value: 12,text: "11:20am"},{value: 13,text: "11:30am"},{value: 14,text: "11:40am"},{value: 15,text: "11:50am"},{value: 16,text: "12pm"},{value: 17,text: "12:10pm"},{value: 18,text: "12:20pm"},{value: 19,text: "12:30pm"},{value: 20,text: "12:40pm"},{value: 21,text: "12:50pm"},{value: 22,text: "1pm"},{value: 23,text: "1:10pm"},{value: 24,text: "1:20pm"},{value: 25,text: "1:30pm"},{value: 26,text: "1:40pm"},{value: 27,text: "1:50pm"},{value: 28,text: "2pm"},{value: 29,text: "2:10pm"},{value: 30,text: "2:20pm"},{value: 31,text: "2:30pm"},{value: 32,text: "2:40pm"},{value: 33,text: "2:50pm"},{value: 34,text: "3pm"},{value: 35,text: "3:10pm"},{value: 36,text: "3:20pm"},{value: 37,text: "3:30pm"},{value: 38,text: "3:40pm"},{value: 39,text: "3:50pm"},{value: 40,text: "4pm"}];
// BOTTOM OF PAGE
                </script>



</html>

Solution

  • Found solution http://codebins.com/bin/4ldqp8z/2

    extended axis2d and its some so simple. not there is not need to calculate steps on anything. just give whatever labels you want to give.

    dojo.provide("myDojo.myAxis");
    dojo.declare("myDojo.myAxis", dojox.charting.axis2d.Default, {
            calculate: function(min, max, span, labels){
                this.inherited(arguments);
                this.ticks.major= [{ value:4, label:"10am"},{ value:22, label:"1pm"},{ value:40, label:"4pm"}]
                return this;
            }
        });
          dojox.charting.axis2d.myAxis = myDojo.myAxis;
    

    Add type while adding axis

    .addAxis("x", {
                    labels: labels, /* Lables are coming from here*/
                    majorTicks:false,
                    majorTick:{length:4,color:"#FFFFFF"},
                    majorLabels:true,
                    majorTickStep:10,
                    minorTicks:false,
                    max:40,
                    type:"myAxis",
                    stroke: {color:"#CFCFCF",width:"1"}})