使用SpiderWebPlot时带有值的工具提示 [英] Tooltip with values while using SpiderWebPlot

问题描述

我正在使用JFreeChart的SpiderWebPlot来生成图表。但我想拥有的是具有价值观的工具提示。我发现我应该将StandardCategoryTooltipGenerator设置为情节，但这似乎不是重点。这是我的示例代码：

I'm using SpiderWebPlot from JFreeChart in order to generate a chart. But what I want to have, is tooltips with values. I've found that I should set StandardCategoryTooltipGenerator to the plot, but that doesn't seem to be the point. Here is my sample code:

private JFreeChart prepareChart() {
    Random rnd = new java.util.Random();
    DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
    String rowKey = "Osobnik";
    dataSet.addValue(rnd.nextInt(20), rowKey, "BLUFF");
    dataSet.addValue(rnd.nextInt(20), rowKey, "CALL");
    dataSet.addValue(rnd.nextInt(20), rowKey, "CHECK");
    dataSet.addValue(rnd.nextInt(20), rowKey, "FOLD");
    dataSet.addValue(rnd.nextInt(20), rowKey, "RAISE");

    SpiderWebPlot plot = new SpiderWebPlot(dataSet);
    // CategoryToolTipGenerator generator = new
    // StandardCategoryToolTipGenerator();
    // generator.generateToolTip(dataSet, 0, 1);
    plot.setToolTipGenerator(new StandardCategoryToolTipGenerator());
    plot.setStartAngle(54D);
    plot.setInteriorGap(0.40000000000000002D);
    plot.setToolTipGenerator(new StandardCategoryToolTipGenerator());
    JFreeChart chart = new JFreeChart(plot);

    return chart;
}

以下是我要完成的示例。

Here is the example of what I'm trying to accomplish.

推荐答案

ChartPanel 向图表注册以接收图表任何组件变更的通知。我怀疑你忽略了构建 ChartPanel ;给定静态版本的 prepareChart（），以下 main（）适合我。另请参见 初始主题 。

ChartPanel "registers with the chart to receive notification of changes to any component of the chart." I suspect you have neglected to construct a ChartPanel; given a static version of prepareChart(), the following main() works for me. See also Initial Threads.

public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {

        @Override
        public void run() {
            JFrame f = new JFrame("Spider Web Plot");
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            f.add(new ChartPanel(prepareChart()));
            f.pack();
            f.setLocationRelativeTo(null);
            f.setVisible(true);
        }
    });
}

附录：根据发布的截图，您需要自定义 CategoryItemLabelGenerator ，可以使用 setLabelGenerator（）进行设置。它将从 drawLabel（）调用，显示为这里。例如，

Addendum: Based on the posted screenshots, you'll need a custom CategoryItemLabelGenerator, which can be set using setLabelGenerator(). It will be called from drawLabel(), shown here. For example,

plot.setLabelGenerator(new StandardCategoryItemLabelGenerator() {

    @Override
    public String generateColumnLabel(CategoryDataset dataset, int col) {
        return dataset.getColumnKey(col) + " " + dataset.getValue(0, col);
    }
});

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