如何在 JavaFX 中创建自定义 ProgressIndicator？

我已经解决了我的问题，感谢@Slaw 的想法。

public class AnimatedNeonCircle extends Circle {

private     final       RotateTransition      transition;

public AnimatedNeonCircle (AnimatedNeonCircle.Animation a, double radius, double strokeWidth, Double... dashedArray) {
    this.transition = new RotateTransition (a.durationProperty ().get (), AnimatedNeonCircle.this);
    this.transition.setCycleCount (a.cycleCountProperty ().get ());
    this.transition.setAutoReverse (a.autoReverseProperty ().get ());
    this.transition.setByAngle (radius);

    super.setFill (Color.TRANSPARENT);
    super.setStroke (Color.CYAN);
    super.setStrokeWidth (strokeWidth);
    super.setEffect (new Glow (0.4));
    super.setRadius (radius);
    super.getStrokeDashArray ().setAll (dashedArray);
}

public void play () {
    transition.play ();
}

// =======================================================================

public static class Animation {

    private     final       SimpleObjectProperty <Duration>     duration        = new SimpleObjectProperty <> ();
    private     final       SimpleIntegerProperty               cycleCount      = new SimpleIntegerProperty ();
    private     final       SimpleBooleanProperty               autoReverse     = new SimpleBooleanProperty ();

    public Animation (Duration duration, int cycleCount, boolean autoReverse) {
        this.duration.set (duration);
        this.cycleCount.set (cycleCount);
        this.autoReverse.set (autoReverse);
    }

    public SimpleObjectProperty <Duration> durationProperty () { return duration; }
    public SimpleIntegerProperty cycleCountProperty () { return cycleCount; }
    public SimpleBooleanProperty autoReverseProperty () { return autoReverse; }

}