If a BorderWidth has percentage based widths, the code in NGRegion and in picking on Region doesn't take this state into account but instead treats the widths as absolute values.


public class HelloRegion extends Application {
    @Override public void start(Stage primaryStage) throws Exception {
        final Pane region = new Pane();
        region.relocate(10, 10);
        region.setPrefSize(100, 100);
        final BorderStroke b1 = new BorderStroke(Color.RED, BorderStrokeStyle.SOLID, new CornerRadii(20), new BorderWidths(.1, .06, .04, .02, true, true, true, true), Insets.EMPTY);
        region.setBorder(new Border(b1));

        Group group = new Group();
        group.getChildren().addAll(region);
        Scene scene = new Scene(group, 300, 300);

        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}