How to use

SpiderWebPlot

in

org.jfree.chart.plot

/**
 * Applies the attributes of this theme to a {@link SpiderWebPlot}.
 *
 * @param plot  the plot (<code>null</code> not permitted).
 */
protected void applyToSpiderWebPlot(SpiderWebPlot plot) {
  plot.setLabelFont(this.regularFont);
  plot.setLabelPaint(this.axisLabelPaint);
  plot.setAxisLinePaint(this.axisLabelPaint);
}

/**
 * Sets the outline stroke for ALL series in the plot. If this is set to
 * {@code null}, then a list of paints is used instead (to allow
 * different colors to be used for each series).
 *
 * @param stroke  the stroke ({@code null} permitted).
 */
public void setSeriesOutlineStroke(Stroke stroke) {
  this.seriesOutlineStroke = stroke;
  fireChangeEvent();
}

RectangleInsets insets = getInsets();
insets.trim(area);
drawBackground(g2, area);
drawOutline(g2, area);
Composite originalComposite = g2.getComposite();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
    getForegroundAlpha()));
    calculateMaxValue(seriesCount, catCount);
  double gapHorizontal = area.getWidth() * getInteriorGap();
  double gapVertical = area.getHeight() * getInteriorGap();
    double angle = getStartAngle()
        + (getDirection().getFactor() * cat * 360 / catCount);
    Point2D endPoint = getWebPoint(radarArea, angle, 1);
    g2.setStroke(this.axisLineStroke);
    g2.draw(line);
    drawLabel(g2, radarArea, 0.0, cat, angle, 360.0 / catCount);
    drawRadarPoly(g2, radarArea, centre, info, series, catCount,
        headH, headW);
  drawNoDataMessage(g2, area);

Rectangle2D labelBounds = getLabelFont().getStringBounds(label, frc);
LineMetrics lm = getLabelFont().getLineMetrics(label, frc);
double ascent = lm.getAscent();
Point2D labelLocation = calculateLabelLocation(labelBounds, ascent,
    plotArea, startAngle);
g2.setPaint(getLabelPaint());
g2.setFont(getLabelFont());
g2.drawString(label, (float) labelLocation.getX(),
    (float) labelLocation.getY());

/**
 * Sets the dataset used by the plot and sends a {@link PlotChangeEvent}
 * to all registered listeners.
 *
 * @param dataset  the dataset ({@code null} permitted).
 *
 * @see #getDataset()
 */
public void setDataset(CategoryDataset dataset) {
  // if there is an existing dataset, remove the plot from the list of
  // change listeners...
  if (this.dataset != null) {
    this.dataset.removeChangeListener(this);
  }
  // set the new dataset, and register the chart as a change listener...
  this.dataset = dataset;
  if (dataset != null) {
    setDatasetGroup(dataset.getGroup());
    dataset.addChangeListener(this);
  }
  // send a dataset change event to self to trigger plot change event
  datasetChanged(new DatasetChangeEvent(this, dataset));
}

private JFreeChart getRadarChart( BaseChart chart, CategoryDataset dataSet )
{
  SpiderWebPlot plot = new SpiderWebPlot( dataSet, TableOrder.BY_ROW );
  plot.setLabelFont( LABEL_FONT );
  JFreeChart radarChart = new JFreeChart( chart.getName(), TITLE_FONT, plot, !chart.isHideLegend() );
  setBasicConfig( radarChart, chart );
  return radarChart;
}

RectangleInsets insets = getInsets();
insets.trim(area);
drawBackground(g2, area);
drawOutline(g2, area);
Composite originalComposite = g2.getComposite();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
    getForegroundAlpha()));
    calculateMaxValue(seriesCount, catCount);
  double gapHorizontal = area.getWidth() * getInteriorGap();
  double gapVertical = area.getHeight() * getInteriorGap();
    double angle = getStartAngle()
        + (getDirection().getFactor() * cat * 360 / catCount);
    Point2D endPoint = getWebPoint(radarArea, angle, 1);
    g2.setStroke(this.axisLineStroke);
    g2.draw(line);
    drawLabel(g2, radarArea, 0.0, cat, angle, 360.0 / catCount);
    drawRadarPoly(g2, radarArea, centre, info, series, catCount,
        headH, headW);
  drawNoDataMessage(g2, area);

Rectangle2D labelBounds = getLabelFont().getStringBounds(label, frc);
LineMetrics lm = getLabelFont().getLineMetrics(label, frc);
double ascent = lm.getAscent();
Point2D labelLocation = calculateLabelLocation(labelBounds, ascent,
    plotArea, startAngle);
g2.setPaint(getLabelPaint());
g2.setFont(getLabelFont());
g2.drawString(label, (float) labelLocation.getX(),
    (float) labelLocation.getY());

/**
 * Sets the dataset used by the plot and sends a {@link PlotChangeEvent}
 * to all registered listeners.
 *
 * @param dataset  the dataset (<code>null</code> permitted).
 *
 * @see #getDataset()
 */
public void setDataset(CategoryDataset dataset) {
  // if there is an existing dataset, remove the plot from the list of
  // change listeners...
  if (this.dataset != null) {
    this.dataset.removeChangeListener(this);
  }
  // set the new dataset, and register the chart as a change listener...
  this.dataset = dataset;
  if (dataset != null) {
    setDatasetGroup(dataset.getGroup());
    dataset.addChangeListener(this);
  }
  // send a dataset change event to self to trigger plot change event
  datasetChanged(new DatasetChangeEvent(this, dataset));
}

/**
 * Sets the outline paint for ALL series in the plot. If this is set to
 * {@code null}, then a list of paints is used instead (to allow
 * different colors to be used for each series).
 *
 * @param paint  the paint ({@code null} permitted).
 */
public void setSeriesOutlinePaint(Paint paint) {
  this.seriesOutlinePaint = paint;
  fireChangeEvent();
}

/**
 * Applies the attributes of this theme to a {@link SpiderWebPlot}.
 *
 * @param plot  the plot ({@code null} not permitted).
 */
protected void applyToSpiderWebPlot(SpiderWebPlot plot) {
  plot.setLabelFont(this.regularFont);
  plot.setLabelPaint(this.axisLabelPaint);
  plot.setAxisLinePaint(this.axisLabelPaint);
}

/**
 * Sets the webFilled flag and sends a {@link PlotChangeEvent} to all
 * registered listeners.
 *
 * @param flag  the flag.
 *
 * @see #isWebFilled()
 */
public void setWebFilled(boolean flag) {
  this.webFilled = flag;
  fireChangeEvent();
}

/**
 * Sets the head percent and sends a {@link PlotChangeEvent} to all
 * registered listeners.
 *
 * @param percent  the percent.
 *
 * @see #getHeadPercent()
 */
public void setHeadPercent(double percent) {
  this.headPercent = percent;
  fireChangeEvent();
}

/**
 * Sets the axis label gap and sends a {@link PlotChangeEvent} to all
 * registered listeners.
 *
 * @param gap  the gap.
 *
 * @see #getAxisLabelGap()
 */
public void setAxisLabelGap(double gap) {
  this.axisLabelGap = gap;
  fireChangeEvent();
}

/**
 * Sets the outline stroke for ALL series in the plot. If this is set to
 * </code> null</code>, then a list of paints is used instead (to allow
 * different colors to be used for each series).
 *
 * @param stroke  the stroke (<code>null</code> permitted).
 */
public void setSeriesOutlineStroke(Stroke stroke) {
  this.seriesOutlineStroke = stroke;
  fireChangeEvent();
}

/**
 * Sets the webFilled flag and sends a {@link PlotChangeEvent} to all
 * registered listeners.
 *
 * @param flag  the flag.
 *
 * @see #isWebFilled()
 */
public void setWebFilled(boolean flag) {
  this.webFilled = flag;
  fireChangeEvent();
}

/**
 * Sets the head percent and sends a {@link PlotChangeEvent} to all
 * registered listeners.
 *
 * @param percent  the percent.
 *
 * @see #getHeadPercent()
 */
public void setHeadPercent(double percent) {
  this.headPercent = percent;
  fireChangeEvent();
}

/**
 * Sets the maximum value any category axis can take and sends
 * a {@link PlotChangeEvent} to all registered listeners.
 *
 * @param value  the maximum value.
 *
 * @see #getMaxValue()
 */
public void setMaxValue(double value) {
  this.maxValue = value;
  fireChangeEvent();
}

/**
 * Sets the paint for ALL series in the plot.  If this is set to 
 * {@code null}, then a list of paints is used instead (to allow different 
 * colors to be used for each series of the radar group).
 *
 * @param paint the paint ({@code null} permitted).
 *
 * @see #getSeriesPaint()
 */
public void setSeriesPaint(Paint paint) {
  this.seriesPaint = paint;
  fireChangeEvent();
}

/**
 * Sets the URL generator for the plot and sends a
 * {@link PlotChangeEvent} to all registered listeners.
 *
 * @param generator  the generator ({@code null} permitted).
 *
 * @see #getURLGenerator()
 *
 * @since 1.0.2
 */
public void setURLGenerator(CategoryURLGenerator generator) {
  this.urlGenerator = generator;
  fireChangeEvent();
}