Question

我是JavaScript和Dojo的新手，所以请耐心等待。我正在尝试使用DataSeries对象创建一个饼图，如下所示：

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);
});

它工作正常，除了一件事：我不喜欢固定的超时。我必须在加载数据后刷新图例，否则不会显示;但是我不知道要附加哪个事件以便在获取数据后立即刷新图例。我看到DataSeries类有onFetchError事件但没有onFetchSuccess事件。我怎么知道数据已成功加载？

Answer 1

我知道这已经很晚了，但无论如何我都会发帖，以防有人遇到同样的问题。我查看了DataSeries.js，他们使用了一个未记录的钩子。我不能保证你会在整个api更新中保持不变，它看起来像是：

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

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

DojoToolkit：dojox.charting.DataSeries，如何连接数据刷新事件？

1 个答案: