How to use

createOutsetRectangle

method

in

org.jfree.ui.RectangleInsets

/**
 * Creates an outset rectangle.
 * 
 * @param base  the base rectangle (<code>null</code> not permitted).
 * 
 * @return An outset rectangle.
 */
public Rectangle2D createOutsetRectangle(final Rectangle2D base) {
  return createOutsetRectangle(base, true, true);
}
 

/**
 * Creates an outset rectangle.
 * 
 * @param base  the base rectangle (<code>null</code> not permitted).
 * 
 * @return An outset rectangle.
 */
public Rectangle2D createOutsetRectangle(final Rectangle2D base) {
  return createOutsetRectangle(base, true, true);
}
 

/**
 * Creates an outset rectangle.
 * 
 * @param base  the base rectangle (<code>null</code> not permitted).
 * 
 * @return An outset rectangle.
 */
public Rectangle2D createOutsetRectangle(final Rectangle2D base) {
  return createOutsetRectangle(base, true, true);
}
 

Rectangle2D fb = this.insets.createOutsetRectangle(bounds);

/**
 * Returns a rectangle that encloses the axis label.  This is typically
 * used for layout purposes (it gives the maximum dimensions of the label).
 *
 * @param g2  the graphics device.
 * @param edge  the edge of the plot area along which the axis is measuring.
 *
 * @return The enclosing rectangle.
 */
protected Rectangle2D getLabelEnclosure(Graphics2D g2, RectangleEdge edge) {
  Rectangle2D result = new Rectangle2D.Double();
  String axisLabel = getLabel();
  if (axisLabel != null && !axisLabel.equals("")) {
    FontMetrics fm = g2.getFontMetrics(getLabelFont());
    Rectangle2D bounds = TextUtilities.getTextBounds(axisLabel, g2, fm);
    RectangleInsets insets = getLabelInsets();
    bounds = insets.createOutsetRectangle(bounds);
    double angle = getLabelAngle();
    if (edge == RectangleEdge.LEFT || edge == RectangleEdge.RIGHT) {
      angle = angle - Math.PI / 2.0;
    }
    double x = bounds.getCenterX();
    double y = bounds.getCenterY();
    AffineTransform transformer
      = AffineTransform.getRotateInstance(angle, x, y);
    Shape labelBounds = transformer.createTransformedShape(bounds);
    result = labelBounds.getBounds2D();
  }
  return result;
}

FontMetrics fm = g2.getFontMetrics();
Rectangle2D bounds = TextUtilities.getTextBounds(label, g2, fm);
Rectangle2D out = this.labelPadding.createOutsetRectangle(
    bounds);
Shape bg = ShapeUtilities.createTranslatedShape(out,