JavaFX着色XYChart.Series [英] JavaFX Coloring XYChart.Series

问题描述

我试图风格我的JavaFX区域图，但是找不到任何方法设置颜色的特定系列。我知道，我可以通过CSS样式，但我想在代码中也做。

I am trying to style my JavaFX Area-Chart, but can't find any way to set color to specific series. I know, that I can style via CSS, but i want to do it in the code also.

我该怎么做？
1.）如何使用内联样式将颜色设置为面积图？

How can i do that? 1.) How to set a color to Area-Chart with Inline Styles?

感谢您的帮助。

@ Jose：

我这样做之前，但它对我来说不起作用。

I done it before like this, but it does not work for me!

@Override
    public void start(Stage primaryStage)
    {
        final AreaChart<String, Number> areaChart = new AreaChart<>(new CategoryAxis(), new NumberAxis());

        ObservableList<XYChart.Data<String, Integer>> xyList = FXCollections.observableArrayList(
            new XYChart.Data<>("P1", 30),
            new XYChart.Data<>("P2", 40),
            new XYChart.Data<>("P3", 30));
        XYChart.Series series = new XYChart.Series(xyList);
        areaChart.getData().addAll(series);

        Button button = new Button("Change style");
        button.setOnAction(new EventHandler<ActionEvent>()
        {

            @Override
            public void handle(ActionEvent arg0)
            {
                int redColor = 0, greenColor = 127, blueColor = 195;
                double opacity = 0.3;
                areaChart.setStyle("CHART_COLOR_1: rgb(" + redColor + "," + greenColor + "," + blueColor + "); "
                    + "CHART_COLOR_1_TRANS_20: rgba(" + redColor + "," + greenColor + "," + blueColor + "," + opacity + ");");

            }
        });

        VBox root = new VBox();
        root.getChildren().addAll(button, areaChart);
        Scene scene = new Scene(root, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

推荐答案

http://stackoverflow.com/a/26733056/3956070\">answer 在Java 7中不起作用，因为默认的CSS样式表是Caspian，而不是Modena。

This answer does not work in Java 7, because the default CSS stylesheet is Caspian, not Modena.

在Caspian中，未定义主颜色调色板的这些常数： CHART_COLOR_1 ， CHART_COLOR_1_TRANS_20 ，...

In Caspian these constants for the main color palette are not defined: CHART_COLOR_1, CHART_COLOR_1_TRANS_20,...

因此，如果要应用内联样式，可以使用查找方法查找该系列，并将样式应用于符号，线条和/或区域，基于他们的CSS选择器。例如：

So if you want to apply inline styling one way to do it is by finding the series with a lookup and apply your styling to symbols, lines and/or areas, based on their CSS selectors. For instance:

@Override
public void start(Stage primaryStage) {

    final AreaChart<String, Number> areaChart = new AreaChart<>(new CategoryAxis(), new NumberAxis());

    ObservableList<XYChart.Data<String, Integer>> xyList = FXCollections.observableArrayList(
        new XYChart.Data<>("P1", 30),
        new XYChart.Data<>("P2", 40),
        new XYChart.Data<>("P3", 30));
    XYChart.Series series = new XYChart.Series(xyList);
    areaChart.getData().addAll(series);

    Scene scene = new Scene(areaChart, 400, 300);
    primaryStage.setScene(scene);
    primaryStage.show();

    int redColor = 0, greenColor = 127, blueColor = 195;
    double opacity = 0.3;

    for(Node symbol : areaChart.lookupAll(".default-color0.chart-area-symbol")){
        symbol.setStyle("-fx-background-color: rgb(" + redColor + "," + greenColor + "," + blueColor + "), white; ");
    }
    Node line = areaChart.lookup(".default-color0.chart-series-area-line");
    line.setStyle("-fx-stroke: rgb(" + redColor + "," + greenColor + "," + blueColor + "); ");
    Node area = areaChart.lookup(".default-color0.chart-series-area-fill");
    area.setStyle("-fx-fill: rgba(" + redColor + "," + greenColor + "," + blueColor + "," + opacity + "); ");
}

EDIT

上面的解决方案最多可以工作8个系列。

The above solution will work up to 8 series.

对于任何数量的系列，其他方法也可以工作：

For any number of series this other approach will work too:

    int numSeries=10;
    final int[] redColor = new int[numSeries];
    Arrays.fill(redColor, 0);
    final int[] greenColor =new int[numSeries]; 
    Arrays.fill(greenColor, 127);
    final int[] blueColor = new int[numSeries];
    Arrays.fill(blueColor, 195);
    double opacity = 0.3;


    for(int i=0; i<numSeries; i++){
        for(Node n : areaChart.lookupAll(".series"+i)){
            n.setStyle("-fx-background-color: rgb(" + redColor[i] + "," + greenColor[i] + "," + blueColor[i] + "), white; "
                    + "-fx-stroke: rgb(" + redColor[i] + "," + greenColor[i] + "," + blueColor[i] + "); "
                    + "-fx-fill: rgba(" + redColor[i] + "," + greenColor[i] + "," + blueColor[i] + "," + opacity + "); ");
        }
    }

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