我正在用JavaFX创建一个线状图。目前一切都很好,它成功地用我从数据库存储过程中需要的数据创建了图表。无论如何,如果可能的话,我需要的是LineChart上的每个数据点都有一个鼠标悬停事件,鼠标悬停事件表示特定点后面的值,例如,15万if。我在PieCharts上看到了这样的例子,它在悬停时显示了%的值,但是我在任何地方都找不到LineCharts的例子,甚至可以这样做吗?
如果可能的话谁能给我指明正确的方向吗?
目前为止的代码:
private static final String MINIMIZED = "MINIMIZED";
private static final String MAXIMIZED = "MAXIMIZED";
private static String chartState = MINIMIZED;
// 12 Month Sales Chart
XYChart.Series<String, Number> series = new XYChart.Series<>();
XYChart.Series<String, Number> series2 = new XYChart.Series<>();
public void getDeltaData() {
    try {
        Connection con = DriverManager.getConnection(connectionUrl);
        //Get all records from table
        String SQL = "";
        Statement stmt = con.createStatement();
        //Create the result set from query execution.
        ResultSet rs = stmt.executeQuery(SQL);
        while (rs.next()) {
            series.getData().add(new XYChart.Data<String, Number>(rs.getString(1),
                    Double.parseDouble(rs.getString(7))));
            series2.getData().add(new XYChart.Data<String, Number>(rs.getString(1),
                    Double.parseDouble(rs.getString(8))));
        }
        rs.close();
        stmt.close();
    } catch (Exception e) {
    }
    yearChart = createChart();
}
    protected LineChart<String, Number> createChart() {
    final CategoryAxis xAxis = new CategoryAxis();
    final NumberAxis yAxis = new NumberAxis();
    // setup chart
    series.setName("Target");
    series2.setName("Actual");
    xAxis.setLabel("Period");
    yAxis.setLabel("£");
    yearChart.getData().add(series);
    yearChart.getData().add(series2);
    yearChart.setCreateSymbols(false);
    return yearChart;
}珠宝海提供的答案是解决这个问题的完美方法。
谢谢珠宝商。
发布于 2013-01-31 10:21:53
使用XYChart.Data.setNode(hoverPane)显示每个数据点的自定义节点。让hoverNode像StackPane一样成为一个容器。添加鼠标事件侦听器,以便您知道何时鼠标进场和叶节点。在enter中,在hoverPane中放置一个值的hoverPane。退出时,从hoverPane中移除标签。
有一些示例代码可以演示这种技术。
示例代码的输出显示在22节点上游标悬停。

发布于 2016-11-04 21:21:22
使用工具提示的:
import java.util.Iterator;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.TreeMap;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.chart.XYChart.Data;
import javafx.scene.control.Tooltip;
import javafx.stage.Stage;
/**
 *
 * @author blj0011
 */
public class JavaFXApplication250 extends Application
{
    @Override
    public void start(Stage stage)
    {
        stage.setTitle("Line Chart Sample");
        //defining the axes
        final NumberAxis xAxis = new NumberAxis();
        final NumberAxis yAxis = new NumberAxis();
        xAxis.setLabel("Number of Month");
        //creating the chart
        final LineChart<Number, Number> lineChart = new LineChart<>(xAxis, yAxis);
        lineChart.setTitle("Stock Monitoring, 2010");
        //defining a series
        XYChart.Series<Number, Number> series = new XYChart.Series();
        series.setName("My portfolio");
        //populating the series with data
        Random rand = new Random();
        TreeMap<Integer, Integer> data = new TreeMap();
        //Create Chart data
        for (int i = 0; i < 3; i++) {
            data.put(rand.nextInt(51), rand.nextInt(51));
        }
        Set set = data.entrySet();
        Iterator i = set.iterator();
        while (i.hasNext()) {
            Map.Entry me = (Map.Entry) i.next();
            System.out.println(me.getKey() + " - " + me.getValue());
            series.getData().add(new XYChart.Data(me.getKey(), me.getValue()));//Add data to series
        }
        lineChart.getData().add(series);
        //loop through data and add tooltip
        //THIS MUST BE DONE AFTER ADDING THE DATA TO THE CHART!
        for (Data<Number, Number> entry : series.getData()) {                
            System.out.println("Entered!");
            Tooltip t = new Tooltip(entry.getYValue().toString());
            Tooltip.install(entry.getNode(), t);
        }
        Scene scene = new Scene(lineChart, 800, 600);
        stage.setScene(scene);
        stage.show();
    }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)
    {
        launch(args);
    }    
}https://stackoverflow.com/questions/14615590
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