Shape.contains产生不一致的结果

Question

在JavaFx中将.contains用于形状时，根据形状是否为组的一部分，会得到不同的结果。

例如，我创建一个圆，然后使用图形上下文对其进行描边。如果然后我检查鼠标是否按圆圈的contains方法，它将按预期工作。如果再将圈子与画布添加到同一组，然后在圈子内单击，它将不再报告圈子内的任何点击。因此，基本上，只有在圈子不属于组的情况下，似乎包含才起作用。

我用其他形状尝试了此操作，并获得了相同的基本行为。我曾尝试使用事件screenX和screenY，但它们也无法正常工作。

protected final VBox vBox;
protected final Button button;
protected final Canvas canvas;
private final Circle circle;
private boolean grouped;
private final Group group;
private Scene scene;

public ContainsTestBase() {

    vBox = new VBox();
    button = new Button();
    canvas = new Canvas();
    group = new Group();

    setId("AnchorPane");
    setPrefHeight(400.0);
    setPrefWidth(600.0);

    AnchorPane.setBottomAnchor(vBox, 0.0);
    AnchorPane.setLeftAnchor(vBox, 0.0);
    AnchorPane.setRightAnchor(vBox, 0.0);
    AnchorPane.setTopAnchor(vBox, 0.0);
    vBox.setLayoutX(228.0);
    vBox.setLayoutY(75.0);
    vBox.setPrefHeight(400.0);
    vBox.setPrefWidth(600.0);

    button.setMnemonicParsing(false);
    button.setOnAction(this::onTestClicked);
    button.setText("Test");

    canvas.setHeight(375.0);
    canvas.setWidth(600.0);
    group.getChildren().add(canvas);

    vBox.getChildren().add(button);
    vBox.getChildren().add(group);
    getChildren().add(vBox);

    circle = new Circle(250,250,25);
    circle.setFill(Color.AQUA);
    drawCircle();

    canvas.setOnMousePressed((e)->mouseClicked(e));
}


protected  void onTestClicked(javafx.event.ActionEvent actionEvent)
{
    if(grouped)
    {
        group.getChildren().remove(circle);
        grouped = false;
    }
    else
    {
        group.getChildren().add(circle);
        grouped = true;
    }

    canvas.requestFocus();
}

private void drawCircle()
{
    canvas.getGraphicsContext2D().setStroke(Color.BLACK);
    canvas.getGraphicsContext2D().strokeOval(circle.getCenterX() - circle.getRadius(), circle.getCenterY() - circle.getRadius(), circle.getRadius() * 2, circle.getRadius() * 2);
}

private void mouseClicked(MouseEvent e)
{
     //Note I have also tried sceneX and sceneY with each of these 
     //options and in each case if the circle was part of a group the
     // contains method failed

    //works only if circle is not part of group
    if (circle.contains(e.getX(), e.getY()))
    {
        System.out.print("Mouse clicked in circle\n");
    }

    //works only if circle is not part of group- same results as above
    if (circle.getBoundsInParent().contains(e.getX(), e.getY()))
    {
       System.out.print("Mouse clicked in circle\n");
    }

   //works only if circle is not part of group- same results as above
    if (circle.getBoundsInLocal().contains(e.getX(), e.getY()))
    {
        System.out.print("Mouse clicked in circle\n");
    }
}