JavaFX着色XYChart.Series

Question

我正在嘗試設置JavaFX Area-Chart的樣式，但是找不到任何將顏色設置為特定系列的方法。 我知道，我可以通過CSS設置樣式，但是我也想在代碼中進行樣式設置。

我怎樣才能做到這一點？ 1.）如何用內聯樣式為Area-Chart設置顏色？

謝謝您的幫助。

@Jose：

我以前是這樣做的，但是對我不起作用！

@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

這個答案在Java 7中不起作用，因為默認的CSS樣式表是里海而不是摩德納。

在里海CHART_COLOR_1 ， CHART_COLOR_1_TRANS_20主調色板的這些常量： CHART_COLOR_1 ， CHART_COLOR_1_TRANS_20 ，...

因此，如果要應用內嵌樣式的一種方法是通過查找系列來查找樣式，然后根據其CSS選擇器將樣式應用到符號，線條和/或區域。 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 + "); ");
}

編輯

上述解決方案最多可以使用8系列。

對於任何數量的系列，其他方法也將起作用：

    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

您可以使用此：

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

系列的索引在哪里，系列的顏色索引在哪里

在CSS參考specificated 此相同，你可以用你的areaChart的功能的setStyle使用

您可以使用此：

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