Question

我正在尝试设置我的JavaFX Area-Chart，但找不到任何方法将颜色设置为特定系列。我知道，我可以通过CSS设置样式，但我也想在代码中进行设置。

我该怎么做？ 1.）如何使用内联样式将颜色设置为面积图？

感谢您的帮助。

@Jose：

我之前就这样做过，但它对我不起作用！

@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();
    }

Answer 1

这个answer在Java 7中不起作用，因为默认的CSS样式表是Caspian，而不是Modena。

在Caspian中，未定义主色调的常量：CHART_COLOR_1，CHART_COLOR_1_TRANS_20，...

因此，如果您想要应用内联样式，可以通过查找具有查找的系列并根据其CSS选择器将样式应用于符号，线条和/或区域来实现。例如：

@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 + "); ");
}

修改

上述解决方案最多可达8个系列。

对于任何数量的系列，其他方法也适用：

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 + "); "); } }

Answer 2

您可以使用：

chart-series-area-line series<i> default-color<j>

系列的索引在哪里，是系列的颜色索引

在css参考this中具体说明，你可以使用areaChart的setStyle函数

你可以用这个：

Node line = areaChart.lookup(".default-color0.chart-series-area-line");
line.setStyle("-fx-stroke: rgb(" + redColor + "," + greenColor + "," + blueColor + "); ");

JavaFX着色XYChart.Series

2 个答案: