单击条形图或条形图时，打开新的框架或图表

问题描述：

我有一个条形图，它从mysql数据库中获取数据集，而我一直坚持使用 chartMouseClicked 。正如我在上一个问题中了解到的那样，当前在单击x轴或y轴条上时会打印代码。但是如何设置当我单击x或y轴上的特定条并打开新的框架或图表时。

I have a bar chart which gets the dataset from the mysql database, and I am stuck on using the chartMouseClicked. Currently the code prints when clicked on x or y axis bars, as I learned in a previous question, but how do I set that when I click a particular bar on x or y axis and open a new frame or chart. Also an information box would be fine.

private void lineChart() {
// *************** ADDING BAR CHART FROM DATABASE *****************************

try {
    String sql = "select Region, Male, Female from ObeseLondon limit 14";
    JDBCCategoryDataset dataset = new JDBCCategoryDataset(MySQL.Connectdb(), sql);
    JFreeChart chart = ChartFactory.createBarChart("", "Town", "No. Of Obese People", dataset, PlotOrientation.HORIZONTAL, true, true, true);
    chart.setBackgroundPaint(Color.white);
    BarRenderer render = null;
    //CategoryPlot plot = null;
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    plot.getRenderer().setSeriesPaint(0, Color.green);
    plot.getRenderer().setSeriesPaint(1, Color.yellow);
    render = new BarRenderer();

    org.jfree.chart.ChartFrame chartframe = new org.jfree.chart.ChartFrame("Query Chart", chart);
    //chartframe.setVisible(true);
    //chartframe.setSize(200,500);
    panelBarChart.setLayout(new java.awt.BorderLayout());
    ChartPanel chartPanel = new ChartPanel(chart);
    panelBarChart.add(chartPanel);
    panelBarChart.validate();
    chartPanel.addChartMouseListener(new ChartMouseListener() {

@Override
public void chartMouseClicked(ChartMouseEvent event) {
    ChartEntity entity = event.getEntity();
    System.out.println(entity);
}

@Override
public void chartMouseMoved(ChartMouseEvent event) {
}

答

在您的计算机中打开 JOptionPane 处理程序，如下面添加到ChartMouseListener 中所示java / org / jfree / chart / demo / BarChartDemo1.java rel = nofollow noreferrer> BarChartDemo1 。该窗格显示一个标签面板，如图所示在此相关的示例中，但是嵌套的 ChartPanel 也可以工作。

Open a JOptionPane in your handler, as shown below in a ChartMouseListener added to BarChartDemo1. The pane displays a panel of labels, as shown in this related example, but a nested ChartPanel would work as well.

@Override
public void chartMouseClicked(ChartMouseEvent event) {
    CategoryItemEntity entity = (CategoryItemEntity) event.getEntity();
    JPanel panel = new JPanel(new GridLayout(0, 1));
    Comparable row = entity.getRowKey();
    Comparable col = entity.getColumnKey();
    panel.add(new JLabel(String.valueOf(row)));
    panel.add(new JLabel(String.valueOf(col)));
    panel.add(new JLabel(String.valueOf(entity.getDataset().getValue(row, col))));
    JOptionPane.showMessageDialog(rootPane, panel);
}

单击条形图或条形图时，打开新的框架或图表

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