为什么我的Dojo图表中的图例没有显示颜色？

我正在使用道场图表,由于某种原因,我的图表的图例显示的是x而不是颜色.

这是我的代码:

dojo.require("dojox.charting.Chart2D");
dojo.require("dojox.charting.themes.PlotKit.blue");
dojo.require("dojox.charting.widget.Legend");
dojo.require("dojox.layout.FloatingPane");
dojo.require("dojox.charting.themes.MiamiNice");
dojo.require("dojo.colors");
makeCharts = function(){
var chart1 = new dojox.charting.Chart2D("simplechart");

chart1.addPlot("default", {type: "StackedColumns", markers: true, tension:3, shadows: {dx: 2, dy: 2, dw: 2}});
chart1.addAxis("x",{labels: [{value: 1 , text: '18-Mar'}, {value: 2 , text: '19-Mar'}, {value: 3 , text: '20-Mar'}, {value: 4 , text: '21-Mar'}, {value: 5 , text: '22-Mar'}, {value: 6 , text: '23-Mar'}]});
chart1.addAxis("y", {vertical:true});

chart1.addSeries("Four", [196,209,77,218,48,243]);

chart1.addSeries("One", [266,158,131,228,217,262]);

chart1.addSeries("Three", [296,214,267,80,40,225]);

chart1.addSeries("Two", [207,264,115,227,193,27]);

chart1.setTheme(dojox.charting.themes.MiamiNice);
var legend = new dojox.charting.widget.Legend({chart: chart1, horizontal: true}, "legend");

chart1.render();
}

dojo.addOnLoad(makeCharts);

正如我所说,图表显示完美但是,Legend没有任何颜色.

找到问题后,必须在图表呈现后声明图例.

非常感谢#dojo的人们指点我的更多例子让我注意到了这一点.