向jFreechart添加图例 [英] Adding legend to jFreechart

问题描述

我得出了最终的磁滞曲线，如下所示:

我之前的帖子: 使用jFreeChart绘制磁滞回线

我在第一个磁滞回线中使用了4个XYSeries，在第二个磁滞回线中使用了另外四个.

如果我打开图例

 JFreeChart chart = ChartFactory.createXYLineChart(
"Hysteresis Plot", // chart title
"Pounds(lb)", // domain axis label
"Movement(inch)", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false // urls
);

它看起来像这样:

我只想显示蓝色是我的第一个磁滞回线，红色是我的第二个磁滞回线，我已将其作为副标题添加在第一张图片中作为解决方法.有人可以指导我如何添加手动图例，该图例将蓝色表示为第一个循环，将红色表示为第二个循环.

谢谢

解决方案

由于ChartFactory.createXYLineChart()创建了XYPlot，因此您可以尝试此处和此处.

更雄心勃勃的方案是隐藏原始图例，并将图例项呈现在单独的组件中，如此处所示.

I have come up with my final hysteresis plot, which looks like this:

My earlier post: Plotting a hysteresis loop with jFreeChart

I have used 4 XYSeries for my first hysteresis loop and another four for the second hysteresis loop.

If i turn on the legend

 JFreeChart chart = ChartFactory.createXYLineChart(
"Hysteresis Plot", // chart title
"Pounds(lb)", // domain axis label
"Movement(inch)", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false // urls
);

it appears like this :

I just want to show that blue is my first hysteresis loop and red is my second hysteresis loop, which I have added as subtitle in the first pic as workaround. Can someone guide how I can add manual legends which indicate blue as first loop and red as second.

Thanks

解决方案

Because ChartFactory.createXYLineChart() creates an XYPlot, you could try setFixedLegendItems(), mentioned here and here.

A more ambitious scheme is to suppress the native legend and render the legend items in a separate component, as shown here.

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