How to use

setLength

method

in

javafx.scene.shape.Arc

/**
 * {@inheritDoc}
 */
@Override
protected void layoutChildren(double contentX, double contentY, double contentWidth, double contentHeight) {
  final double strokeWidth = arc.getStrokeWidth();
  final double radius = Math.min(contentWidth, contentHeight) / 2 - strokeWidth / 2;
  final double arcSize = snapSize(radius * 2 + strokeWidth);
  arcPane.resizeRelocate((contentWidth - arcSize) / 2 + 1, (contentHeight - arcSize) / 2 + 1, arcSize, arcSize);
  updateArcLayout(radius, arcSize);
  fillRect.setWidth(arcSize);
  fillRect.setHeight(arcSize);
  if (!isValid) {
    initialize();
    isValid = true;
  }
  if (!getSkinnable().isIndeterminate()) {
    arc.setLength(arcLength);
    if (text.isVisible()) {
      final double progress = control.getProgress();
      int intProgress = (int) Math.round(progress * 100.0);
      Font font = text.getFont();
      text.setFont(Font.font(font.getFamily(), radius / 1.7));
      text.setText((progress > 1 ? 100 : intProgress) + "%");
      text.relocate((arcSize - text.getLayoutBounds().getWidth()) / 2, (arcSize - text.getLayoutBounds().getHeight()) / 2);
    }
  }
}

arc.setManaged(false);
arc.setStartAngle(0);
arc.setLength(180);
arc.getStyleClass().setAll("arc");
arc.setFill(Color.TRANSPARENT);
track.setManaged(false);
track.setStartAngle(0);
track.setLength(360);
track.setStrokeWidth(3);
track.getStyleClass().setAll("track");

private static Arc createArc(Color stroke, double strokeWidth) {
  Arc a = new Arc();
  a.setStartAngle(135);
  a.setLength(-270);
  a.setFill(Color.TRANSPARENT);
  a.setStroke(stroke);
  a.setStrokeWidth(strokeWidth);
  return a;
}

public GeneratorSymbol(Color stroke, double strokeWidth, double size) {
  setPrefSize(size, size);
  c = new Circle();
  c.setFill(Color.TRANSPARENT);
  c.setStroke(stroke);
  c.setStrokeWidth(strokeWidth);
  a1 = new Arc();
  a1.setStartAngle(0);
  a1.setLength(180);
  a1.setFill(Color.TRANSPARENT);
  a1.setStroke(stroke);
  a1.setStrokeWidth(strokeWidth);
  a2 = new Arc();
  a2.setStartAngle(0);
  a2.setLength(-180);
  a2.setFill(Color.TRANSPARENT);
  a2.setStroke(stroke);
  a2.setStrokeWidth(strokeWidth);
  getChildren().addAll(c, a1, a2);
}

/**
 * {@inheritDoc}
 */
@Override
protected void layoutChildren(double contentX, double contentY, double contentWidth, double contentHeight) {
  final double strokeWidth = arc.getStrokeWidth();
  final double radius = Math.min(contentWidth, contentHeight) / 2 - strokeWidth / 2;
  final double arcSize = snapSize(radius * 2 + strokeWidth);
  arcPane.resizeRelocate((contentWidth - arcSize) / 2 + 1, (contentHeight - arcSize) / 2 + 1, arcSize, arcSize);
  updateArcLayout(radius, arcSize);
  fillRect.setWidth(arcSize);
  fillRect.setHeight(arcSize);
  if (!isValid) {
    initialize();
    isValid = true;
  }
  if (!getSkinnable().isIndeterminate()) {
    arc.setLength(arcLength);
    if (text.isVisible()) {
      final double progress = control.getProgress();
      int intProgress = (int) Math.round(progress * 100.0);
      Font font = text.getFont();
      text.setFont(Font.font(font.getFamily(), radius / 1.7));
      text.setText((progress > 1 ? 100 : intProgress) + "%");
      text.relocate((arcSize - text.getLayoutBounds().getWidth()) / 2, (arcSize - text.getLayoutBounds().getHeight()) / 2);
    }
  }
}

arc.setManaged(false);
arc.setStartAngle(0);
arc.setLength(180);
arc.getStyleClass().setAll("arc");
arc.setFill(Color.TRANSPARENT);
track.setManaged(false);
track.setStartAngle(0);
track.setLength(360);
track.setStrokeWidth(3);
track.getStyleClass().setAll("track");