else if (marker instanceof IntervalMarker) {
            IntervalMarker im = (IntervalMarker) marker;
            double start = im.getStartValue();
            double end = im.getEndValue();
            Range range = rangeAxis.getRange();
            if (!(range.intersects(start, end))) {
                return;
            }

            double start2d = rangeAxis.valueToJava2D(start, dataArea,
                    plot.getRangeAxisEdge());
            double end2d = rangeAxis.valueToJava2D(end, dataArea,
                    plot.getRangeAxisEdge());
            double low = Math.min(start2d, end2d);
            double high = Math.max(start2d, end2d);

            PlotOrientation orientation = plot.getOrientation();
            Rectangle2D rect = null;
            if (orientation == PlotOrientation.HORIZONTAL) {
                // clip left and right bounds to data area
                low = Math.max(low, dataArea.getMinX());
                high = Math.min(high, dataArea.getMaxX());
                rect = new Rectangle2D.Double(low,
                        dataArea.getMinY(), high - low,
                        dataArea.getHeight());
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                // clip top and bottom bounds to data area
                low = Math.max(low, dataArea.getMinY());
                high = Math.min(high, dataArea.getMaxY());
                rect = new Rectangle2D.Double(dataArea.getMinX(),
                        low, dataArea.getWidth(),
                        high - low);
            }

            final Composite originalComposite = g2.getComposite();
            g2.setComposite(AlphaComposite.getInstance(
                    AlphaComposite.SRC_OVER, marker.getAlpha()));
            Paint p = marker.getPaint();
            if (p instanceof GradientPaint) {
                GradientPaint gp = (GradientPaint) p;
                GradientPaintTransformer t = im.getGradientPaintTransformer();
                if (t != null) {
                    gp = t.transform(gp, rect);
                }
                g2.setPaint(gp);
            }
            else {
                g2.setPaint(p);
            }
            g2.fill(rect);

            // now draw the outlines, if visible...
            if (im.getOutlinePaint() != null && im.getOutlineStroke() != null) {
                if (orientation == PlotOrientation.VERTICAL) {
                    Line2D line = new Line2D.Double();
                    double x0 = dataArea.getMinX();
                    double x1 = dataArea.getMaxX();
                    g2.setPaint(im.getOutlinePaint());
                    g2.setStroke(im.getOutlineStroke());
                    if (range.contains(start)) {
                        line.setLine(x0, start2d, x1, start2d);
                        g2.draw(line);
                    }
                    if (range.contains(end)) {
                        line.setLine(x0, end2d, x1, end2d);
                        g2.draw(line);
                    }
                }
                else { // PlotOrientation.HORIZONTAL
                    Line2D line = new Line2D.Double();
                    double y0 = dataArea.getMinY();
                    double y1 = dataArea.getMaxY();
                    g2.setPaint(im.getOutlinePaint());
                    g2.setStroke(im.getOutlineStroke());
                    if (range.contains(start)) {
                        line.setLine(start2d, y0, start2d, y1);
                        g2.draw(line);
                    }
                    if (range.contains(end)) {
                        line.setLine(end2d, y0, end2d, y1);
                        g2.draw(line);
                    }
                }
            }

            String label = marker.getLabel();
            RectangleAnchor anchor = marker.getLabelAnchor();
            if (label != null) {
                Font labelFont = marker.getLabelFont();
                g2.setFont(labelFont);
                g2.setPaint(marker.getLabelPaint());
                Point2D coordinates = calculateRangeMarkerTextAnchorPoint(
                        g2, orientation, dataArea, rect,
                        marker.getLabelOffset(), marker.getLabelOffsetType(),
                        anchor);
                TextUtilities.drawAlignedString(label, g2,
                        (float) coordinates.getX(), (float) coordinates.getY(),
                        marker.getLabelTextAnchor());
            }
            g2.setComposite(originalComposite);