如何在JavaFX中填充两个AreaCharts？ [英] How to fill between two AreaCharts in JavaFX?

问题描述

JavaFX中的Area Chart填充数据线和零y轴之间的区域。

The Area Chart in JavaFX fills the area between the data line and the zero y-axis.

我只想知道如何在两张区域图表之间填写。

I would only like to know how to fill between two Area Charts.

更多详情：

我正在产生一堆随机游走。然后，我为路径创建三个不同的XYCharts，平均值和平均值+/- std。偏差。最后，我使用StackPane将每个图表以透明背景放在彼此的顶部。

I am generating a bunch of random walks. Then, I create three different XYCharts for the Paths, the mean, and the mean +/- std. deviation. Finally, I use a StackPane to place each chart on top of each other with transparent background.

图表的顺序必须如下：
1.背面的模拟路径图表（LineChart）。
2.标准。偏差图（AreaChart）。
3.顶部的平均图表（LineChart）。

The order of the charts has to be the following: 1. Simulated paths chart on the very back (LineChart). 2. Std. Deviation chart (AreaChart). 3. The mean chart on top (LineChart).

图片 - 突出显示问题。

Pictures - highlighting the problem.

我该如何做到这一点？ CSS是首选。

How can I accomplish this? CSS is preferred.

推荐答案

我设法使用 -fx-blend-mode 财产。以下是两个区域图表的示例：

I managed to achieve the result using -fx-blend-mode property. Here is an example for two area charts:

public void start(Stage stage) throws Exception {

    stage.setTitle("Test");
    final NumberAxis xAxis = new NumberAxis();
    final NumberAxis yAxis = new NumberAxis();
    xAxis.setLabel("X");
    final AreaChart<Number,Number> lineChart =
            new AreaChart<>(xAxis,yAxis);

    lineChart.setTitle("Test");

    XYChart.Series series1 = new XYChart.Series();
    series1.setName("S1");
    series1.getData().add(new XYChart.Data(0, 0));
    series1.getData().add(new XYChart.Data(20, 20));

    XYChart.Series series2 = new XYChart.Series();
    series2.setName("S2");
    series2.getData().add(new XYChart.Data(0, 0));
    series2.getData().add(new XYChart.Data(20, 10));

    Scene scene  = new Scene(lineChart,800,600);
    lineChart.getData().addAll(series1,series2);

    stage.setScene(scene);
    scene.getStylesheets().add("/test.css");
    stage.show();
}

和 test.css中的css ：

.default-color0.chart-series-area-fill {
    -fx-fill: #FF0000;
    -fx-blend-mode: difference;
}
.default-color1.chart-series-area-fill {
    -fx-fill: #FF0000;
    -fx-blend-mode: difference;
}

结果：



修改

屏幕/倍数的CSS：

And the result:

Edit
CSS for screen/multiply:

.default-color0.chart-series-area-fill {
    -fx-fill: rgb(0,178,0);
    -fx-blend-mode: screen;
}

.default-color1.chart-series-area-fill {
    -fx-fill: rgb(255,246,255);
    -fx-blend-mode: multiply;
}

结果：

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