/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2020, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 *
 * -------------------------
 * LineAndShapeRenderer.java
 * -------------------------
 * (C) Copyright 2001-2016, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Mark Watson (www.markwatson.com);
 *                   Jeremy Bowman;
 *                   Richard Atkinson;
 *                   Christian W. Zuckschwerdt;
 *                   Peter Kolb (patch 2497611);
 *
 */

package org.jfree.chart.renderer.category;

import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;

import org.jfree.chart.LegendItem;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.util.BooleanList;
import org.jfree.chart.util.ObjectUtils;
import org.jfree.chart.util.PublicCloneable;
import org.jfree.chart.util.ShapeUtils;
import org.jfree.data.category.CategoryDataset;

/**
 * A renderer that draws shapes for each data item, and lines between data
 * items (for use with the {@link CategoryPlot} class).
 * The example shown here is generated by the {@code LineChartDemo1.java}
 * program included in the JFreeChart Demo Collection:
 * <br><br>
 * <img src="doc-files/LineAndShapeRendererSample.png"
 * alt="LineAndShapeRendererSample.png">
 */
public class LineAndShapeRenderer extends AbstractCategoryItemRenderer
        implements Cloneable, PublicCloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -197749519869226398L;

    /**
     * A table of flags that control (per series) whether or not lines are
     * visible.
     */
    private BooleanList seriesLinesVisible;

    /**
     * A flag indicating whether or not lines are drawn between non-null
     * points.
     */
    private boolean defaultLinesVisible;

    /**
     * A table of flags that control (per series) whether or not shapes are
     * visible.
     */
    private BooleanList seriesShapesVisible;

    /** The default value returned by the getShapeVisible() method. */
    private boolean defaultShapesVisible;

    /**
     * A table of flags that control (per series) whether or not shapes are
     * filled.
     */
    private BooleanList seriesShapesFilled;

    /** The default value returned by the getShapeFilled() method. */
    private boolean defaultShapesFilled;

    /**
     * A flag that controls whether the fill paint is used for filling
     * shapes.
     */
    private boolean useFillPaint;

    /** A flag that controls whether outlines are drawn for shapes. */
    private boolean drawOutlines;

    /**
     * A flag that controls whether the outline paint is used for drawing shape
     * outlines - if not, the regular series paint is used.
     */
    private boolean useOutlinePaint;

    /**
     * A flag that controls whether or not the x-position for each item is
     * offset within the category according to the series.
     *
     * @since 1.0.7
     */
    private boolean useSeriesOffset;

    /**
     * The item margin used for series offsetting - this allows the positioning
     * to match the bar positions of the {@link BarRenderer} class.
     *
     * @since 1.0.7
     */
    private double itemMargin;

    /**
     * Creates a renderer with both lines and shapes visible by default.
     */
    public LineAndShapeRenderer() {
        this(true, true);
    }

    /**
     * Creates a new renderer with lines and/or shapes visible.
     *
     * @param lines  draw lines?
     * @param shapes  draw shapes?
     */
    public LineAndShapeRenderer(boolean lines, boolean shapes) {
        super();
        this.seriesLinesVisible = new BooleanList();
        this.defaultLinesVisible = lines;
        this.seriesShapesVisible = new BooleanList();
        this.defaultShapesVisible = shapes;
        this.seriesShapesFilled = new BooleanList();
        this.defaultShapesFilled = true;
        this.useFillPaint = false;
        this.drawOutlines = true;
        this.useOutlinePaint = false;
        this.useSeriesOffset = false;  // preserves old behaviour
        this.itemMargin = 0.0;
    }

    // LINES VISIBLE

    /**
     * Returns the flag used to control whether or not the line for an item is
     * visible.
     *
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return A boolean.
     */
    public boolean getItemLineVisible(int series, int item) {
        Boolean flag = getSeriesLinesVisible(series);
        if (flag != null) {
            return flag;
        }
        return this.defaultLinesVisible;
    }

    /**
     * Returns the flag used to control whether or not the lines for a series
     * are visible.
     *
     * @param series  the series index (zero-based).
     *
     * @return The flag (possibly {@code null}).
     *
     * @see #setSeriesLinesVisible(int, Boolean)
     */
    public Boolean getSeriesLinesVisible(int series) {
        return this.seriesLinesVisible.getBoolean(series);
    }

    /**
     * Sets the 'lines visible' flag for a series and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param flag  the flag ({@code null} permitted).
     *
     * @see #getSeriesLinesVisible(int)
     */
    public void setSeriesLinesVisible(int series, Boolean flag) {
        this.seriesLinesVisible.setBoolean(series, flag);
        fireChangeEvent();
    }

    /**
     * Sets the 'lines visible' flag for a series and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param visible  the flag.
     *
     * @see #getSeriesLinesVisible(int)
     */
    public void setSeriesLinesVisible(int series, boolean visible) {
        setSeriesLinesVisible(series, Boolean.valueOf(visible));
    }

    /**
     * Returns the default 'lines visible' attribute.
     *
     * @return The default flag.
     *
     * @see #getDefaultLinesVisible()
     */
    public boolean getDefaultLinesVisible() {
        return this.defaultLinesVisible;
    }

    /**
     * Sets the default 'lines visible' flag and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param flag  the flag.
     *
     * @see #getDefaultLinesVisible()
     */
    public void setDefaultLinesVisible(boolean flag) {
        this.defaultLinesVisible = flag;
        fireChangeEvent();
    }

    // SHAPES VISIBLE

    /**
     * Returns the flag used to control whether or not the shape for an item is
     * visible.
     *
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return A boolean.
     */
    public boolean getItemShapeVisible(int series, int item) {
        Boolean flag = getSeriesShapesVisible(series);
        if (flag != null) {
            return flag;
        }
        return this.defaultShapesVisible;
    }

    /**
     * Returns the flag used to control whether or not the shapes for a series
     * are visible.
     *
     * @param series  the series index (zero-based).
     *
     * @return A boolean.
     *
     * @see #setSeriesShapesVisible(int, Boolean)
     */
    public Boolean getSeriesShapesVisible(int series) {
        return this.seriesShapesVisible.getBoolean(series);
    }

    /**
     * Sets the 'shapes visible' flag for a series and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param visible  the flag.
     *
     * @see #getSeriesShapesVisible(int)
     */
    public void setSeriesShapesVisible(int series, boolean visible) {
        setSeriesShapesVisible(series, Boolean.valueOf(visible));
    }

    /**
     * Sets the 'shapes visible' flag for a series and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param flag  the flag.
     *
     * @see #getSeriesShapesVisible(int)
     */
    public void setSeriesShapesVisible(int series, Boolean flag) {
        this.seriesShapesVisible.setBoolean(series, flag);
        fireChangeEvent();
    }

    /**
     * Returns the default 'shape visible' attribute.
     *
     * @return The base flag.
     *
     * @see #setDefaultShapesVisible(boolean)
     */
    public boolean getDefaultShapesVisible() {
        return this.defaultShapesVisible;
    }

    /**
     * Sets the default 'shapes visible' flag and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param flag  the flag.
     *
     * @see #getDefaultShapesVisible()
     */
    public void setDefaultShapesVisible(boolean flag) {
        this.defaultShapesVisible = flag;
        fireChangeEvent();
    }

    /**
     * Returns {@code true} if outlines should be drawn for shapes, and
     * {@code false} otherwise.
     *
     * @return A boolean.
     *
     * @see #setDrawOutlines(boolean)
     */
    public boolean getDrawOutlines() {
        return this.drawOutlines;
    }

    /**
     * Sets the flag that controls whether outlines are drawn for
     * shapes, and sends a {@link RendererChangeEvent} to all registered
     * listeners.
     * <P>
     * In some cases, shapes look better if they do NOT have an outline, but
     * this flag allows you to set your own preference.
     *
     * @param flag  the flag.
     *
     * @see #getDrawOutlines()
     */
    public void setDrawOutlines(boolean flag) {
        this.drawOutlines = flag;
        fireChangeEvent();
    }

    /**
     * Returns the flag that controls whether the outline paint is used for
     * shape outlines.  If not, the regular series paint is used.
     *
     * @return A boolean.
     *
     * @see #setUseOutlinePaint(boolean)
     */
    public boolean getUseOutlinePaint() {
        return this.useOutlinePaint;
    }

    /**
     * Sets the flag that controls whether the outline paint is used for shape
     * outlines, and sends a {@link RendererChangeEvent} to all registered
     * listeners.
     *
     * @param use  the flag.
     *
     * @see #getUseOutlinePaint()
     */
    public void setUseOutlinePaint(boolean use) {
        this.useOutlinePaint = use;
        fireChangeEvent();
    }

    // SHAPES FILLED

    /**
     * Returns the flag used to control whether or not the shape for an item
     * is filled. The default implementation passes control to the
     * {@code getSeriesShapesFilled} method. You can override this method
     * if you require different behaviour.
     *
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return A boolean.
     */
    public boolean getItemShapeFilled(int series, int item) {
        return getSeriesShapesFilled(series);
    }

    /**
     * Returns the flag used to control whether or not the shapes for a series
     * are filled.
     *
     * @param series  the series index (zero-based).
     *
     * @return A boolean.
     */
    public boolean getSeriesShapesFilled(int series) {
        Boolean flag = this.seriesShapesFilled.getBoolean(series);
        if (flag != null) {
            return flag;
        }
        return this.defaultShapesFilled;
    }

    /**
     * Sets the 'shapes filled' flag for a series and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param filled  the flag.
     *
     * @see #getSeriesShapesFilled(int)
     */
    public void setSeriesShapesFilled(int series, Boolean filled) {
        this.seriesShapesFilled.setBoolean(series, filled);
        fireChangeEvent();
    }

    /**
     * Sets the 'shapes filled' flag for a series and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param filled  the flag.
     *
     * @see #getSeriesShapesFilled(int)
     */
    public void setSeriesShapesFilled(int series, boolean filled) {
        // delegate
        setSeriesShapesFilled(series, Boolean.valueOf(filled));
    }

    /**
     * Returns the default 'shape filled' attribute.
     *
     * @return The base flag.
     *
     * @see #setDefaultShapesFilled(boolean)
     */
    public boolean getDefaultShapesFilled() {
        return this.defaultShapesFilled;
    }

    /**
     * Sets the default 'shapes filled' flag and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param flag  the flag.
     *
     * @see #getDefaultShapesFilled()
     */
    public void setDefaultShapesFilled(boolean flag) {
        this.defaultShapesFilled = flag;
        fireChangeEvent();
    }

    /**
     * Returns {@code true} if the renderer should use the fill paint
     * setting to fill shapes, and {@code false} if it should just
     * use the regular paint.
     *
     * @return A boolean.
     *
     * @see #setUseFillPaint(boolean)
     */
    public boolean getUseFillPaint() {
        return this.useFillPaint;
    }

    /**
     * Sets the flag that controls whether the fill paint is used to fill
     * shapes, and sends a {@link RendererChangeEvent} to all
     * registered listeners.
     *
     * @param flag  the flag.
     *
     * @see #getUseFillPaint()
     */
    public void setUseFillPaint(boolean flag) {
        this.useFillPaint = flag;
        fireChangeEvent();
    }

    /**
     * Returns the flag that controls whether or not the x-position for each
     * data item is offset within the category according to the series.
     *
     * @return A boolean.
     *
     * @see #setUseSeriesOffset(boolean)
     *
     * @since 1.0.7
     */
    public boolean getUseSeriesOffset() {
        return this.useSeriesOffset;
    }

    /**
     * Sets the flag that controls whether or not the x-position for each
     * data item is offset within its category according to the series, and
     * sends a {@link RendererChangeEvent} to all registered listeners.
     *
     * @param offset  the offset.
     *
     * @see #getUseSeriesOffset()
     *
     * @since 1.0.7
     */
    public void setUseSeriesOffset(boolean offset) {
        this.useSeriesOffset = offset;
        fireChangeEvent();
    }

    /**
     * Returns the item margin, which is the gap between items within a
     * category (expressed as a percentage of the overall category width).
     * This can be used to match the offset alignment with the bars drawn by
     * a {@link BarRenderer}).
     *
     * @return The item margin.
     *
     * @see #setItemMargin(double)
     * @see #getUseSeriesOffset()
     *
     * @since 1.0.7
     */
    public double getItemMargin() {
        return this.itemMargin;
    }

    /**
     * Sets the item margin, which is the gap between items within a category
     * (expressed as a percentage of the overall category width), and sends
     * a {@link RendererChangeEvent} to all registered listeners.
     *
     * @param margin  the margin (0.0 &lt;= margin &lt; 1.0).
     *
     * @see #getItemMargin()
     * @see #getUseSeriesOffset()
     *
     * @since 1.0.7
     */
    public void setItemMargin(double margin) {
        if (margin < 0.0 || margin >= 1.0) {
            throw new IllegalArgumentException("Requires 0.0 <= margin < 1.0.");
        }
        this.itemMargin = margin;
        fireChangeEvent();
    }

    /**
     * Returns a legend item for a series.
     *
     * @param datasetIndex  the dataset index (zero-based).
     * @param series  the series index (zero-based).
     *
     * @return The legend item.
     */
    @Override
    public LegendItem getLegendItem(int datasetIndex, int series) {

        CategoryPlot cp = getPlot();
        if (cp == null) {
            return null;
        }

        if (isSeriesVisible(series) && isSeriesVisibleInLegend(series)) {
            CategoryDataset dataset = cp.getDataset(datasetIndex);
            String label = getLegendItemLabelGenerator().generateLabel(
                    dataset, series);
            String description = label;
            String toolTipText = null;
            if (getLegendItemToolTipGenerator() != null) {
                toolTipText = getLegendItemToolTipGenerator().generateLabel(
                        dataset, series);
            }
            String urlText = null;
            if (getLegendItemURLGenerator() != null) {
                urlText = getLegendItemURLGenerator().generateLabel(
                        dataset, series);
            }
            Shape shape = lookupLegendShape(series);
            Paint paint = lookupSeriesPaint(series);
            Paint fillPaint = (this.useFillPaint
                    ? getItemFillPaint(series, 0) : paint);
            boolean shapeOutlineVisible = this.drawOutlines;
            Paint outlinePaint = (this.useOutlinePaint
                    ? getItemOutlinePaint(series, 0) : paint);
            Stroke outlineStroke = lookupSeriesOutlineStroke(series);
            boolean lineVisible = getItemLineVisible(series, 0);
            boolean shapeVisible = getItemShapeVisible(series, 0);
            LegendItem result = new LegendItem(label, description, toolTipText,
                    urlText, shapeVisible, shape, getItemShapeFilled(series, 0),
                    fillPaint, shapeOutlineVisible, outlinePaint, outlineStroke,
                    lineVisible, new Line2D.Double(-7.0, 0.0, 7.0, 0.0),
                    getItemStroke(series, 0), getItemPaint(series, 0));
            result.setLabelFont(lookupLegendTextFont(series));
            Paint labelPaint = lookupLegendTextPaint(series);
            if (labelPaint != null) {
                result.setLabelPaint(labelPaint);
            }
            result.setDataset(dataset);
            result.setDatasetIndex(datasetIndex);
            result.setSeriesKey(dataset.getRowKey(series));
            result.setSeriesIndex(series);
            return result;
        }
        return null;

    }

    /**
     * This renderer uses two passes to draw the data.
     *
     * @return The pass count ({@code 2} for this renderer).
     */
    @Override
    public int getPassCount() {
        return 2;
    }

    /**
     * Draw a single data item.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area in which the data is drawn.
     * @param plot  the plot.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     * @param pass  the pass index.
     */
    @Override
    public void drawItem(Graphics2D g2, CategoryItemRendererState state,
            Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis,
            ValueAxis rangeAxis, CategoryDataset dataset, int row, int column,
            int pass) {

        // do nothing if item is not visible
        if (!getItemVisible(row, column)) {
            return;
        }

        // do nothing if both the line and shape are not visible
        if (!getItemLineVisible(row, column)
                && !getItemShapeVisible(row, column)) {
            return;
        }

        // nothing is drawn for null...
        Number v = dataset.getValue(row, column);
        if (v == null) {
            return;
        }

        int visibleRow = state.getVisibleSeriesIndex(row);
        if (visibleRow < 0) {
            return;
        }
        int visibleRowCount = state.getVisibleSeriesCount();

        PlotOrientation orientation = plot.getOrientation();

        // current data point...
        double x1;
        if (this.useSeriesOffset) {
            x1 = domainAxis.getCategorySeriesMiddle(column,
                    dataset.getColumnCount(), visibleRow, visibleRowCount,
                    this.itemMargin, dataArea, plot.getDomainAxisEdge());
        }
        else {
            x1 = domainAxis.getCategoryMiddle(column, getColumnCount(),
                    dataArea, plot.getDomainAxisEdge());
        }
        double value = v.doubleValue();
        double y1 = rangeAxis.valueToJava2D(value, dataArea,
                plot.getRangeAxisEdge());

        if (pass == 0 && getItemLineVisible(row, column)) {
            if (column != 0) {
                Number previousValue = dataset.getValue(row, column - 1);
                if (previousValue != null) {
                    // previous data point...
                    double previous = previousValue.doubleValue();
                    double x0;
                    if (this.useSeriesOffset) {
                        x0 = domainAxis.getCategorySeriesMiddle(
                                column - 1, dataset.getColumnCount(),
                                visibleRow, visibleRowCount,
                                this.itemMargin, dataArea,
                                plot.getDomainAxisEdge());
                    }
                    else {
                        x0 = domainAxis.getCategoryMiddle(column - 1,
                                getColumnCount(), dataArea,
                                plot.getDomainAxisEdge());
                    }
                    double y0 = rangeAxis.valueToJava2D(previous, dataArea,
                            plot.getRangeAxisEdge());

                    Line2D line = null;
                    if (orientation == PlotOrientation.HORIZONTAL) {
                        line = new Line2D.Double(y0, x0, y1, x1);
                    }
                    else if (orientation == PlotOrientation.VERTICAL) {
                        line = new Line2D.Double(x0, y0, x1, y1);
                    }
                    g2.setPaint(getItemPaint(row, column));
                    g2.setStroke(getItemStroke(row, column));
                    g2.draw(line);
                }
            }
        }

        if (pass == 1) {
            Shape shape = getItemShape(row, column);
            if (orientation == PlotOrientation.HORIZONTAL) {
                shape = ShapeUtils.createTranslatedShape(shape, y1, x1);
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                shape = ShapeUtils.createTranslatedShape(shape, x1, y1);
            }

            if (getItemShapeVisible(row, column)) {
                if (getItemShapeFilled(row, column)) {
                    if (this.useFillPaint) {
                        g2.setPaint(getItemFillPaint(row, column));
                    }
                    else {
                        g2.setPaint(getItemPaint(row, column));
                    }
                    g2.fill(shape);
                }
                if (this.drawOutlines) {
                    if (this.useOutlinePaint) {
                        g2.setPaint(getItemOutlinePaint(row, column));
                    }
                    else {
                        g2.setPaint(getItemPaint(row, column));
                    }
                    g2.setStroke(getItemOutlineStroke(row, column));
                    g2.draw(shape);
                }
            }

            // draw the item label if there is one...
            if (isItemLabelVisible(row, column)) {
                if (orientation == PlotOrientation.HORIZONTAL) {
                    drawItemLabel(g2, orientation, dataset, row, column, y1,
                            x1, (value < 0.0));
                }
                else if (orientation == PlotOrientation.VERTICAL) {
                    drawItemLabel(g2, orientation, dataset, row, column, x1,
                            y1, (value < 0.0));
                }
            }

            // submit the current data point as a crosshair candidate
            int datasetIndex = plot.indexOf(dataset);
            updateCrosshairValues(state.getCrosshairState(),
                    dataset.getRowKey(row), dataset.getColumnKey(column),
                    value, datasetIndex, x1, y1, orientation);

            // add an item entity, if this information is being collected
            EntityCollection entities = state.getEntityCollection();
            if (entities != null) {
                addItemEntity(entities, dataset, row, column, shape);
            }
        }

    }

    /**
     * Tests this renderer for equality with an arbitrary object.
     *
     * @param obj  the object ({@code null} permitted).
     *
     * @return A boolean.
     */
    @Override
    public boolean equals(Object obj) {

        if (obj == this) {
            return true;
        }
        if (!(obj instanceof LineAndShapeRenderer)) {
            return false;
        }

        LineAndShapeRenderer that = (LineAndShapeRenderer) obj;
        if (this.defaultLinesVisible != that.defaultLinesVisible) {
            return false;
        }
        if (!ObjectUtils.equal(this.seriesLinesVisible,
                that.seriesLinesVisible)) {
            return false;
        }
        if (this.defaultShapesVisible != that.defaultShapesVisible) {
            return false;
        }
        if (!ObjectUtils.equal(this.seriesShapesVisible,
                that.seriesShapesVisible)) {
            return false;
        }
        if (!ObjectUtils.equal(this.seriesShapesFilled,
                that.seriesShapesFilled)) {
            return false;
        }
        if (this.defaultShapesFilled != that.defaultShapesFilled) {
            return false;
        }
        if (this.useOutlinePaint != that.useOutlinePaint) {
            return false;
        }
        if (this.useSeriesOffset != that.useSeriesOffset) {
            return false;
        }
        if (this.itemMargin != that.itemMargin) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * Returns an independent copy of the renderer.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException  should not happen.
     */
    @Override
    public Object clone() throws CloneNotSupportedException {
        LineAndShapeRenderer clone = (LineAndShapeRenderer) super.clone();
        clone.seriesLinesVisible
                = (BooleanList) this.seriesLinesVisible.clone();
        clone.seriesShapesVisible
                = (BooleanList) this.seriesShapesVisible.clone();
        clone.seriesShapesFilled
                = (BooleanList) this.seriesShapesFilled.clone();
        return clone;
    }

}