How to use

setLabelLinkStyle

method

in

org.jfree.chart.plot.PiePlot

/**
 * Applies the attributes of this theme to a {@link PiePlot} instance.
 * This method also clears any set values for the section paint, outline
 * etc, so that the theme's {@link DrawingSupplier} will be used.
 *
 * @param plot  the plot (<code>null</code> not permitted).
 */
protected void applyToPiePlot(PiePlot plot) {
  plot.setLabelLinkPaint(this.labelLinkPaint);
  plot.setLabelLinkStyle(this.labelLinkStyle);
  plot.setLabelFont(this.regularFont);
  // clear the section attributes so that the theme's DrawingSupplier
  // will be used
  if (plot.getAutoPopulateSectionPaint()) {
    plot.clearSectionPaints(false);
  }
  if (plot.getAutoPopulateSectionOutlinePaint()) {
    plot.clearSectionOutlinePaints(false);
  }
  if (plot.getAutoPopulateSectionOutlineStroke()) {
    plot.clearSectionOutlineStrokes(false);
  }
}

/**
 * Applies the attributes of this theme to a {@link PiePlot} instance.
 * This method also clears any set values for the section paint, outline
 * etc, so that the theme's {@link DrawingSupplier} will be used.
 *
 * @param plot  the plot ({@code null} not permitted).
 */
protected void applyToPiePlot(PiePlot plot) {
  plot.setLabelLinkPaint(this.labelLinkPaint);
  plot.setLabelLinkStyle(this.labelLinkStyle);
  plot.setLabelFont(this.regularFont);
  plot.setShadowGenerator(this.shadowGenerator);
  // clear the section attributes so that the theme's DrawingSupplier
  // will be used
  if (plot.getAutoPopulateSectionPaint()) {
    plot.clearSectionPaints(false);
  }
  if (plot.getAutoPopulateSectionOutlinePaint()) {
    plot.clearSectionOutlinePaints(false);
  }
  if (plot.getAutoPopulateSectionOutlineStroke()) {
    plot.clearSectionOutlineStrokes(false);
  }
}

piePlot.setLabelPaint(WidgetUtils.BG_COLOR_DARK);
piePlot.setSectionOutlinesVisible(false);
piePlot.setLabelLinkStyle(PieLabelLinkStyle.QUAD_CURVE);
piePlot.setDrawingSupplier(new DCDrawingSupplier());