/** Graphic instance for rendering detected label. */
public class CloudLabelGraphic extends Graphic {
  private final Paint textPaint;
  private final GraphicOverlay overlay;

  private List labels;

  CloudLabelGraphic(GraphicOverlay overlay) {
    super(overlay);
    this.overlay = overlay;
    textPaint = new Paint();
    textPaint.setColor(Color.WHITE);
    textPaint.setTextSize(60.0f);
  }

  synchronized void updateLabel(List labels) {
    this.labels = labels;
    postInvalidate();
  }

  @Override
  public synchronized void draw(Canvas canvas) {
    float x = overlay.getWidth() / 4.0f;
    float y = overlay.getHeight() / 4.0f;

    for (String label : labels) {
      canvas.drawText(label, x, y, textPaint);
      y = y - 62.0f;
    }
  }
}