CODEWITHSUNDEEP
javascripteventsdojodojox.charting
Alex Tokarev
Alex Tokarev

Reputation: 4861

DojoToolkit: dojox.charting.DataSeries, how to connect to data refresh event?

I'm new to JavaScript and Dojo so please bear with me. I'm trying to create a Pie chart using DataSeries object, like this:

var skillStore = new dojo.data.ItemFileReadStore({
    url: "/data/skillhead.json"
});

function formatPieChartData(store, item) {
  var tooltips = {
    AVAILABLE: "Available agents",
    ONACD: "Agents on ACD calls",
    INACW: "Agents in ACW",
    INAUX: "Agents in AUX",
    AGINRING: "Agents with ringing phones",
    OTHER: "Agents otherwise occupied",
  };

  var ivalue = store.getValue(item, "value");
  var legend = store.getValue(item, "legend");
  var tooltip = tooltips[store.getValue(item, "field")];

  var o = { y: ivalue, legend: legend, tooltip: tooltip }
  return o;
}

/* This is how the data looks like after massaging
var chartData = [
    { y: 10, legend: "AVAIL", tooltip: "Available agents" },
    { y: 20, legend: "ONACD", tooltip: "Agents on ACD calls" },
    { y: 30, legend: "INACW", tooltip: "Agents in ACW" },
    { y: 40, legend: "INAUX", tooltip: "Agents in AUX" },
    { y: 50, legend: "INRING", tooltip: "Agents with ringing phones" },
    { y: 60, legend: "OTHER", tooltip: "Agents otherwise occupied" }
];
 */

var series = new dojox.charting.DataSeries(skillStore,
    { query: {
        field: new RegExp("INACW|INAUX|AGINRING|OTHER|" +
                  "AVAILABLE|ONACD")
    } },
    formatPieChartData);

dojo.addOnLoad( function() {

chart = new dojox.charting.Chart("chartNode");
chart.setTheme(dojox.charting.themes.PrimaryColors);

chart.addPlot("default", {
    type: "Pie",
    radius: 85,
    labels: false,
    ticks: false,
    markers: false
});
chart.addSeries("default", series);

var highlight = new dojox.charting.action2d.Highlight(chart, "default");
var tip = new dojox.charting.action2d.Tooltip(chart, "default");

grid.startup();
chart.render();

legend = new dojox.charting.widget.Legend({
        chart: chart,
        horizontal: false,
        style: "font-size: 11px;",
        },
        "chartLegend");
legend.startup();

setTimeout(function(){ legend.refresh() }, 1000);
});

It works fine, except one thing: I don't like the fixed timeout. I have to refresh legend after the data is loaded, otherwise it is not displayed; however I don't know which event to attach to in order to refresh legend right after the data is fetched. I see DataSeries class has onFetchError event but no onFetchSuccess event. How do I know that the data was loaded successfully?

Upvotes: 2

Views: 2660

Answers (1)

WhatAWorld
WhatAWorld

Reputation: 394

I know this is late, but I'm posting it anyway in case anyone has the same issue. I took a look through DataSeries.js and they have an undocumented hook they are using. I can't promise you this will stay the same throughout api updates, it looks something like:

dojo.connect(dataSeries, "_onFetchComplete", myObj, "myFunction");

See http://dojotoolkit.org/reference-guide/dojo/connect.html

Upvotes: 1

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