如何在javafx中绘制峰值地图 [英] how to paint peak map in javafx
问题描述
我想在javafx中绘制一个峰值地图,但是没有一个类来完成我的目标。所以我修改了LineChart作为我的峰值地图,它看起来是
警告:这是非常棘手的解决方案。
找到零水平线对象并将 xAxis
移动到此位置:
final LineChart< Number,Number> lineChart = new LineChart<>(xAxis,yAxis);
final ObservableList< Node> lineChildren = lineChart.getChildrenUnmodifiable();
final可选<节点> chartContent = lineChildren
.stream()
.filter(node - > node.getStyleClass()。contains(chart-content))
.findFirst();
if(chartContent.isPresent()){
final Optional< Node> xyChart =((Parent)chartContent.get())
.getChildrenUnmodifiable()
.stream()
.filter(node - > node.getStyleClass()。isEmpty())
.findFirst();
if(xyChart.isPresent()){
final Optional< Node> xAxisOrigin =((Parent)xyChart.get())
.getChildrenUnmodifiable()
.stream()
.filter(node - > node.getStyleClass()。contains(chart- horizontal-zero-line))
.findFirst();
if(xAxisOrigin.isPresent()){
final Line node =(Line)xAxisOrigin.get();
Platform.runLater(() - > {
xAxis.setTranslateY( - (xAxis.getLayoutY() - node.getEndY()));
});
}
}
}
至于我X和Y标签可能会被删除。
注意:我们需要处理窗口大小调整事件来移动 xAxis
动态。
I want to paint a peak map in javafx, but there isn't a class to finish my aim. So I modified "LineChart" to be my "peak map", it looks that. But I want to move X axis to 0 scale(y axis), what can I do to achieve it.
By the way, if you have a better method to achieve "peak map", please give me some advices.
Thanks!
public void start(Stage stage) {
stage.setTitle("Line Chart Sample");
final NumberAxis xAxis = new NumberAxis();
final NumberAxis yAxis = new NumberAxis();
xAxis.setLabel("X");
yAxis.setLabel("Y");
final LineChart<Number, Number> lineChart = new LineChart<>(xAxis, yAxis);
lineChart.setTitle("Peak Map");
XYChart.Series<Number, Number> series1 = new XYChart.Series<>();
series1.setName("Portfolio 1");
series1.getData().add(new XYChart.Data<Number, Number>(1, 0));
series1.getData().add(new XYChart.Data<Number, Number>(1, 14));
XYChart.Series<Number, Number> series2 = new XYChart.Series<>();
series2.setName("Portfolio 2");
series2.getData().add(new XYChart.Data<Number, Number>(2, 0));
series2.getData().add(new XYChart.Data<Number, Number>(2, 34));
XYChart.Series<Number, Number> series3 = new XYChart.Series<>();
series3.setName("Portfolio 3");
series3.getData().add(new XYChart.Data<Number, Number>(3, 0));
series3.getData().add(new XYChart.Data<Number, Number>(3, 35));
XYChart.Series<Number, Number> series4 = new XYChart.Series<>();
series4.setName("Protfolio 4");
series4.getData().add(new XYChart.Data<>(2, 0));
series4.getData().add(new XYChart.Data<>(2, -8));
Scene scene = new Scene(lineChart, 800, 600);
lineChart.getData().addAll(series1, series2, series3, series4);
lineChart.setCreateSymbols(false);
lineChart.setLegendVisible(false);
stage.setScene(scene);
stage.show();
}
I played a bit with your code. Are you expecting something like this result?
Warning: it is really tricky solution.
Find a zero horizontal line object and move the xAxis
to this position:
final LineChart<Number, Number> lineChart = new LineChart<>(xAxis, yAxis);
final ObservableList<Node> lineChildren = lineChart.getChildrenUnmodifiable();
final Optional<Node> chartContent = lineChildren
.stream()
.filter(node -> node.getStyleClass().contains("chart-content"))
.findFirst();
if (chartContent.isPresent()) {
final Optional<Node> xyChart = ((Parent)chartContent.get())
.getChildrenUnmodifiable()
.stream()
.filter(node -> node.getStyleClass().isEmpty())
.findFirst();
if (xyChart.isPresent()) {
final Optional<Node> xAxisOrigin = ((Parent) xyChart.get())
.getChildrenUnmodifiable()
.stream()
.filter(node -> node.getStyleClass().contains("chart-horizontal-zero-line"))
.findFirst();
if (xAxisOrigin.isPresent()) {
final Line node = (Line) xAxisOrigin.get();
Platform.runLater(() -> {
xAxis.setTranslateY(-(xAxis.getLayoutY() - node.getEndY()));
});
}
}
}
As for me X and Y labels may be removed at all.
Note: we need handle window sizing event to move xAxis
dynamically.
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