Javafx 从ColorPicker更新图表颜色

我使用此代码示例创建带有颜色选择器的面积图：

import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.animation.AnimationTimer;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.chart.AreaChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart.Series;
import javafx.scene.control.ColorPicker;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class MainApp extends Application
{

    private static final int MAX_DATA_POINTS = 50;

    private Series series;
    private int xSeriesData = 0;
    private final ConcurrentLinkedQueue<Number> dataQ = new ConcurrentLinkedQueue<>();
    private ExecutorService executor;
    private AddToQueue addToQueue;
    private Timeline timeline2;
    private NumberAxis xAxis;
    private NumberAxis yAxis;
    private AreaChart<Number, Number> sc;

    private void init(Stage primaryStage)
    {

        xAxis = new NumberAxis(0, MAX_DATA_POINTS, MAX_DATA_POINTS / 10);
        xAxis.setForceZeroInRange(false);
        xAxis.setAutoRanging(false);

        yAxis = new NumberAxis();
        yAxis.setAutoRanging(true);

        sc = new AreaChart<Number, Number>(xAxis, yAxis);
        sc.getStylesheets().add(getClass().getResource("/styles/AreaChart.css").toExternalForm());

        sc.setAnimated(false);
        sc.setId("liveAreaChart");
        sc.setTitle("Animated Area Chart");

        //-- Chart Series
        series = new AreaChart.Series<Number, Number>();
        series.setName("Area Chart Series");
        sc.getData().add(series);

        final ColorPicker colorPicker = new ColorPicker();

        colorPicker.setOnAction(new EventHandler()
        {
            @Override
            public void handle(Event t)
            {
                changeColor(colorPicker.getValue().getRed(), colorPicker.getValue().getGreen(), colorPicker.getValue().getBlue(), colorPicker.getValue().getOpacity());
            }
        });

        VBox root = new VBox(5, colorPicker, sc);

        primaryStage.setScene(new Scene(root));
    }

    private void changeColor(double redColor, double greenColor, double blueColor, double opacity)
    {
        int r = (int) Math.round(redColor * 255.0);
        int g = (int) Math.round(greenColor * 255.0);
        int b = (int) Math.round(blueColor * 255.0);

        sc.setStyle("CHART_COLOR_1: rgb(" + r + "," + g + "," + b + ");"
            + "CHART_COLOR_1_TRANS_20: rgba(" + r + "," + g + "," + b + "," + 0.2 + ");");
    }

    @Override
    public void start(Stage primaryStage) throws Exception
    {
        init(primaryStage);
        primaryStage.show();

        //-- Prepare Executor Services
        //-- Prepare Executor Services
        executor = Executors.newCachedThreadPool(new ThreadFactory()
        {
            @Override
            public Thread newThread(Runnable r)
            {
                Thread thread = new Thread(r);
                thread.setDaemon(true);
                return thread;
            }
        });
        addToQueue = new AddToQueue();
        executor.execute(addToQueue);
        //-- Prepare Timeline
        prepareTimeline();
    }

    public static void main(String[] args)
    {
        launch(args);
    }

    private class AddToQueue implements Runnable
    {
        @Override
        public void run()
        {
            try
            {
                // add a item of random data to queue
                dataQ.add(Math.random());
                Thread.sleep(50);
                executor.execute(this);
            }
            catch (InterruptedException ex)
            {
                Logger.getLogger(MainApp.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

    //-- Timeline gets called in the JavaFX Main thread
    private void prepareTimeline()
    {
        // Every frame to take any data from queue and add to chart
        new AnimationTimer()
        {
            @Override
            public void handle(long now)
            {
                addDataToSeries();
            }
        }.start();
    }

    private void addDataToSeries()
    {
        for (int i = 0; i < 20; i++)
        { //-- add 20 numbers to the plot+
            if (dataQ.isEmpty())
                break;
            series.getData().add(new AreaChart.Data(xSeriesData++, dataQ.remove()));
        }
        // remove points to keep us at no more than MAX_DATA_POINTS
        if (series.getData().size() > MAX_DATA_POINTS)
        {
            series.getData().remove(0, series.getData().size() - MAX_DATA_POINTS);
        }
        // update
        xAxis.setLowerBound(xSeriesData - MAX_DATA_POINTS);
        xAxis.setUpperBound(xSeriesData - 1);
    }
}

当我从ColorPicker更改颜色时，什么也没有发生，因为我应用了外部CSS文件中的样式

---

你知道是什么导致了这个问题吗？

你没有在css文件中使用任何对

CHART\u COLOR\u 1

或

CHART\u COLOR\u 1\u TRANS\u 20

的引用。因此，如果您只是使用setStyle更改这些值，视觉上不会发生任何变化，因为您将颜色值硬编码为

.default-color0.chart-series-area-line{
    -fx-stroke: #989898; ...
}

这是modena.css中的内容：

.default-color0.chart-series-area-line { -fx-stroke: CHART_COLOR_1; }

---

我试过了，但是颜色很难看。如何在初始应用程序加载后使用自定义颜色并使用颜色选择器进行更改？

.default-color0.chart-series-area-line { -fx-stroke: CHART_COLOR_1; }