/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * -------------------
 * XYItemRenderer.java
 * -------------------
 * (C) Copyright 2001-2005, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Mark Watson (www.markwatson.com);
 *                   Sylvain Vieujot;
 *                   Focus Computer Services Limited;
 *                   Richard Atkinson;
 *
 * $Id: XYItemRenderer.java,v 1.16.2.2 2005/11/30 13:54:11 mungady Exp $
 *
 * Changes
 * -------
 * 19-Oct-2001 : Version 1, based on code by Mark Watson (DG);
 * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
 * 13-Dec-2001 : Changed return type of drawItem from void --> Shape.  The area
 *               returned can be used as the tooltip region.
 * 23-Jan-2002 : Added DrawInfo parameter to drawItem() method (DG);
 * 28-Mar-2002 : Added a property change listener mechanism.  Now renderers do 
 *               not have to be immutable (DG);
 * 04-Apr-2002 : Added the initialise() method (DG);
 * 09-Apr-2002 : Removed the translated zero from the drawItem method, it can 
 *               be calculated inside the initialise method if it is required.
 *               Added a new getToolTipGenerator() method.  Changed the return 
 *               type for drawItem() to void (DG);
 * 24-May-2002 : Added ChartRenderingInfo the initialise method API (DG);
 * 25-Jun-2002 : Removed redundant import (DG);
 * 20-Aug-2002 : Added get/setURLGenerator methods to interface (DG);
 * 02-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 18-Nov-2002 : Added methods for drawing grid lines (DG);
 * 17-Jan-2003 : Moved plot classes into a separate package (DG);
 * 27-Jan-2003 : Added shape lookup table (DG);
 * 05-Jun-2003 : Added domain and range grid bands (sponsored by Focus Computer
 *               Services Ltd) (DG);
 * 27-Jul-2003 : Added getRangeType() to support stacked XY area charts (RA);
 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState.  Renamed 
 *               XYToolTipGenerator --> XYItemLabelGenerator (DG);
 * 26-Feb-2004 : Added lots of new methods (DG);
 * 30-Apr-2004 : Added getRangeExtent() method (DG);
 * 06-May-2004 : Added methods for controlling item label visibility (DG);
 * 13-May-2004 : Removed property change listener mechanism (DG);
 * 18-May-2004 : Added item label font and paint methods (DG);
 * 10-Sep-2004 : Removed redundant getRangeType() method (DG);
 * 06-Oct-2004 : Replaced getRangeExtent() with findRangeBounds() and added 
 *               findDomainBounds (DG);
 * 23-Nov-2004 : Changed drawRangeGridLine() --> drawRangeLine() (DG);
 * 07-Jan-2005 : Removed deprecated method (DG);
 * 24-Feb-2005 : Now extends LegendItemSource (DG);
 * 20-Apr-2005 : Renamed XYLabelGenerator --> XYItemLabelGenerator (DG);
 *
 */

package org.jfree.chart.renderer.xy;

import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Rectangle2D;

import org.jfree.chart.LegendItem;
import org.jfree.chart.LegendItemSource;
import org.jfree.chart.annotations.XYAnnotation;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.event.RendererChangeListener;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.XYItemLabelGenerator;
import org.jfree.chart.labels.XYSeriesLabelGenerator;
import org.jfree.chart.labels.XYToolTipGenerator;
import org.jfree.chart.plot.CrosshairState;
import org.jfree.chart.plot.Marker;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.urls.XYURLGenerator;
import org.jfree.data.Range;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.Layer;

/**
 * Interface for rendering the visual representation of a single (x, y) item on
 * an {@link XYPlot}.
 * <p>
 * To support cloning charts, it is recommended that renderers implement both 
 * the {@link Cloneable} and <code>PublicCloneable</code> interfaces.
 */
public interface XYItemRenderer extends LegendItemSource {

    /**
     * Initialises the renderer then returns the number of 'passes' through the
     * data that the renderer will require (usually just one).  This method 
     * will be called before the first item is rendered, giving the renderer 
     * an opportunity to initialise any state information it wants to maintain.
     * The renderer can do nothing if it chooses.
     *
     * @param g2  the graphics device.
     * @param dataArea  the area inside the axes.
     * @param plot  the plot.
     * @param dataset  the dataset.
     * @param info  an optional info collection object to return data back to 
     *              the caller.
     *
     * @return The number of passes the renderer requires.
     */
    public XYItemRendererState initialise(Graphics2D g2,
                                          Rectangle2D dataArea,
                                          XYPlot plot,
                                          XYDataset dataset,
                                          PlotRenderingInfo info);

    /**
     * Returns the number of passes through the data required by the renderer.
     * 
     * @return The pass count.
     */
    public int getPassCount();

    /**
     * Returns a boolean that indicates whether or not the specified item 
     * should be drawn (this is typically used to hide an entire series).
     * 
     * @param series  the series index.
     * @param item  the item index.
     * 
     * @return A boolean.
     */
    public boolean getItemVisible(int series, int item);
    
    /**
     * Returns a boolean that indicates whether or not the specified series 
     * should be drawn (this is typically used to hide an entire series).
     * 
     * @param series  the series index.
     * 
     * @return A boolean.
     */
    public boolean isSeriesVisible(int series);
    
    /**
     * Returns the flag that controls the visibility of ALL series.  This flag 
     * overrides the per series and default settings - you must set it to 
     * <code>null</code> if you want the other settings to apply.
     * 
     * @return The flag (possibly <code>null</code>).
     */
    public Boolean getSeriesVisible();
    
    /**
     * Sets the flag that controls the visibility of ALL series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.  This flag 
     * overrides the per series and default settings - you must set it to 
     * <code>null</code> if you want the other settings to apply.
     * 
     * @param visible  the flag (<code>null</code> permitted).
     */
    public void setSeriesVisible(Boolean visible);
    
    /**
     * Sets the flag that controls the visibility of ALL series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.  This flag 
     * overrides the per series and default settings - you must set it to 
     * <code>null</code> if you want the other settings to apply.
     * 
     * @param visible  the flag (<code>null</code> permitted).
     * @param notify  notify listeners?
     */
    public void setSeriesVisible(Boolean visible, boolean notify);
    
    /**
     * Returns the flag that controls whether a series is visible.
     *
     * @param series  the series index (zero-based).
     *
     * @return The flag (possibly <code>null</code>).
     */
    public Boolean getSeriesVisible(int series);
    
    /**
     * Sets the flag that controls whether a series is visible and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param visible  the flag (<code>null</code> permitted).
     */
    public void setSeriesVisible(int series, Boolean visible);
    
    /**
     * Sets the flag that controls whether a series is visible and, if 
     * requested, sends a {@link RendererChangeEvent} to all registered 
     * listeners.
     * 
     * @param series  the series index.
     * @param visible  the flag (<code>null</code> permitted).
     * @param notify  notify listeners?
     */
    public void setSeriesVisible(int series, Boolean visible, boolean notify);

    /**
     * Returns the base visibility for all series.
     *
     * @return The base visibility.
     */
    public boolean getBaseSeriesVisible();

    /**
     * Sets the base visibility and sends a {@link RendererChangeEvent} to all
     * registered listeners.
     *
     * @param visible  the flag.
     */
    public void setBaseSeriesVisible(boolean visible);
    
    /**
     * Sets the base visibility and, if requested, sends 
     * a {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param visible  the visibility.
     * @param notify  notify listeners?
     */
    public void setBaseSeriesVisible(boolean visible, boolean notify);

    // SERIES VISIBLE IN LEGEND (not yet respected by all renderers)
    
    /**
     * Returns <code>true</code> if the series should be shown in the legend,
     * and <code>false</code> otherwise.
     * 
     * @param series  the series index.
     * 
     * @return A boolean.
     */
    public boolean isSeriesVisibleInLegend(int series);
    
    /**
     * Returns the flag that controls the visibility of ALL series in the 
     * legend.  This flag overrides the per series and default settings - you 
     * must set it to <code>null</code> if you want the other settings to 
     * apply.
     * 
     * @return The flag (possibly <code>null</code>).
     */
    public Boolean getSeriesVisibleInLegend();
    
    /**
     * Sets the flag that controls the visibility of ALL series in the legend 
     * and sends a {@link RendererChangeEvent} to all registered listeners.  
     * This flag overrides the per series and default settings - you must set 
     * it to <code>null</code> if you want the other settings to apply.
     * 
     * @param visible  the flag (<code>null</code> permitted).
     */
    public void setSeriesVisibleInLegend(Boolean visible);
    
    /**
     * Sets the flag that controls the visibility of ALL series in the legend 
     * and sends a {@link RendererChangeEvent} to all registered listeners.  
     * This flag overrides the per series and default settings - you must set 
     * it to <code>null</code> if you want the other settings to apply.
     * 
     * @param visible  the flag (<code>null</code> permitted).
     * @param notify  notify listeners?
     */
    public void setSeriesVisibleInLegend(Boolean visible, boolean notify);
    
    /**
     * Returns the flag that controls whether a series is visible in the 
     * legend.  This method returns only the "per series" settings - to 
     * incorporate the override and base settings as well, you need to use the 
     * {@link #isSeriesVisibleInLegend(int)} method.
     *
     * @param series  the series index (zero-based).
     *
     * @return The flag (possibly <code>null</code>).
     */
    public Boolean getSeriesVisibleInLegend(int series);
    
    /**
     * Sets the flag that controls whether a series is visible in the legend 
     * and sends a {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param visible  the flag (<code>null</code> permitted).
     */
    public void setSeriesVisibleInLegend(int series, Boolean visible);
    
    /**
     * Sets the flag that controls whether a series is visible in the legend
     * and, if requested, sends a {@link RendererChangeEvent} to all registered 
     * listeners.
     * 
     * @param series  the series index.
     * @param visible  the flag (<code>null</code> permitted).
     * @param notify  notify listeners?
     */
    public void setSeriesVisibleInLegend(int series, Boolean visible, 
                                         boolean notify);

    /**
     * Returns the base visibility in the legend for all series.
     *
     * @return The base visibility.
     */
    public boolean getBaseSeriesVisibleInLegend();

    /**
     * Sets the base visibility in the legend and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param visible  the flag.
     */
    public void setBaseSeriesVisibleInLegend(boolean visible);
    
    /**
     * Sets the base visibility in the legend and, if requested, sends 
     * a {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param visible  the visibility.
     * @param notify  notify listeners?
     */
    public void setBaseSeriesVisibleInLegend(boolean visible, boolean notify);

    // PAINT
    
    /**
     * Returns the paint used to fill data items as they are drawn.
     *
     * @param row  the row (or series) index (zero-based).
     * @param column  the column (or category) index (zero-based).
     *
     * @return The paint (never <code>null</code>).
     */
    public Paint getItemPaint(int row, int column);

    /**
     * Returns the paint used to fill an item drawn by the renderer.
     *
     * @param series  the series index (zero-based).
     *
     * @return The paint (never <code>null</code>).
     */
    public Paint getSeriesPaint(int series);

    /**
     * Sets the paint to be used for ALL series, and sends a 
     * {@link RendererChangeEvent} to all registered listeners.  If this is 
     * <code>null</code>, the renderer will use the paint for the series.
     * 
     * @param paint  the paint (<code>null</code> permitted).
     */
    public void setPaint(Paint paint);
    
    /**
     * Sets the paint used for a series and sends a {@link RendererChangeEvent}
     * to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param paint  the paint (<code>null</code> permitted).
     */
    public void setSeriesPaint(int series, Paint paint);
    
    /**
     * Returns the base paint.
     *
     * @return The base paint (never <code>null</code>).
     */
    public Paint getBasePaint();

    /**
     * Sets the base paint and sends a {@link RendererChangeEvent} to all 
     * registered listeners.
     *
     * @param paint  the paint (<code>null</code> not permitted).
     */
    public void setBasePaint(Paint paint);
    
    // OUTLINE PAINT
    
    /**
     * Returns the paint used to outline data items as they are drawn.
     *
     * @param row  the row (or series) index (zero-based).
     * @param column  the column (or category) index (zero-based).
     *
     * @return The paint (never <code>null</code>).
     */
    public Paint getItemOutlinePaint(int row, int column);

    /**
     * Returns the paint used to outline an item drawn by the renderer.
     *
     * @param series  the series (zero-based index).
     *
     * @return The paint (never <code>null</code>).
     */
    public Paint getSeriesOutlinePaint(int series);

    /**
     * Sets the paint used for a series outline and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param paint  the paint (<code>null</code> permitted).
     */
    public void setSeriesOutlinePaint(int series, Paint paint);

    /**
     * Sets the outline paint for ALL series (optional).
     * 
     * @param paint  the paint (<code>null</code> permitted).
     */
    public void setOutlinePaint(Paint paint);
    
    /**
     * Returns the base outline paint.
     *
     * @return The paint (never <code>null</code>).
     */
    public Paint getBaseOutlinePaint();

    /**
     * Sets the base outline paint and sends a {@link RendererChangeEvent} to
     * all registered listeners.
     *
     * @param paint  the paint (<code>null</code> not permitted).
     */
    public void setBaseOutlinePaint(Paint paint);

    // STROKE
    
    /**
     * Returns the stroke used to draw data items.
     *
     * @param row  the row (or series) index (zero-based).
     * @param column  the column (or category) index (zero-based).
     *
     * @return The stroke (never <code>null</code>).
     */
    public Stroke getItemStroke(int row, int column);

    /**
     * Returns the stroke used to draw the items in a series.
     *
     * @param series  the series (zero-based index).
     *
     * @return The stroke (never <code>null</code>).
     */
    public Stroke getSeriesStroke(int series);
    
    /**
     * Sets the stroke for ALL series and sends a {@link RendererChangeEvent} 
     * to all registered listeners.
     * 
     * @param stroke  the stroke (<code>null</code> permitted).
     */
    public void setStroke(Stroke stroke);

    /**
     * Sets the stroke used for a series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param stroke  the stroke (<code>null</code> permitted).
     */
    public void setSeriesStroke(int series, Stroke stroke);

    /**
     * Returns the base stroke.
     *
     * @return The base stroke (never <code>null</code>).
     */
    public Stroke getBaseStroke();

    /**
     * Sets the base stroke.
     *
     * @param stroke  the stroke (<code>null</code> not permitted).
     */
    public void setBaseStroke(Stroke stroke);
    
    // OUTLINE STROKE 
    
    /**
     * Returns the stroke used to outline data items.  The default 
     * implementation passes control to the getSeriesOutlineStroke method.
     * You can override this method if you require different behaviour.
     *
     * @param row  the row (or series) index (zero-based).
     * @param column  the column (or category) index (zero-based).
     *
     * @return The stroke (never <code>null</code>).
     */
    public Stroke getItemOutlineStroke(int row, int column);

    /**
     * Returns the stroke used to outline the items in a series.
     *
     * @param series  the series (zero-based index).
     *
     * @return The stroke (never <code>null</code>).
     */
    public Stroke getSeriesOutlineStroke(int series);

    /**
     * Sets the outline stroke for ALL series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke (<code>null</code> permitted).
     */
    public void setOutlineStroke(Stroke stroke);
    
    /**
     * Sets the outline stroke used for a series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param stroke  the stroke (<code>null</code> permitted).
     */
    public void setSeriesOutlineStroke(int series, Stroke stroke);
    
    /**
     * Returns the base outline stroke.
     *
     * @return The stroke (never <code>null</code>).
     */
    public Stroke getBaseOutlineStroke();

    /**
     * Sets the base outline stroke and sends a {@link RendererChangeEvent} to
     * all registered listeners.
     *
     * @param stroke  the stroke (<code>null</code> not permitted).
     */
    public void setBaseOutlineStroke(Stroke stroke);
    
    // SHAPE
    
    /**
     * Returns a shape used to represent a data item.
     *
     * @param row  the row (or series) index (zero-based).
     * @param column  the column (or category) index (zero-based).
     *
     * @return The shape (never <code>null</code>).
     */
    public Shape getItemShape(int row, int column);

    /**
     * Returns a shape used to represent the items in a series.
     *
     * @param series  the series (zero-based index).
     *
     * @return The shape (never <code>null</code>).
     */
    public Shape getSeriesShape(int series);
    /**
     * Sets the shape for ALL series (optional) and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param shape  the shape (<code>null</code> permitted).
     */
    public void setShape(Shape shape);
    
    /**
     * Sets the shape used for a series and sends a {@link RendererChangeEvent}
     * to all registered listeners.
     *
     * @param series  the series index (zero-based).
     * @param shape  the shape (<code>null</code> permitted).
     */
    public void setSeriesShape(int series, Shape shape);
    
    /**
     * Returns the base shape.
     *
     * @return The shape (never <code>null</code>).
     */
    public Shape getBaseShape();

    /**
     * Sets the base shape and sends a {@link RendererChangeEvent} to all 
     * registered listeners.
     *
     * @param shape  the shape (<code>null</code> not permitted).
     */
    public void setBaseShape(Shape shape);
    
    // ITEM LABELS VISIBLE 
    
    /**
     * Returns <code>true</code> if an item label is visible, and 
     * <code>false</code> otherwise.
     * 
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     * 
     * @return A boolean.
     */
    public boolean isItemLabelVisible(int row, int column);
    
    /**
     * Returns <code>true</code> if the item labels for a series are visible,
     * and <code>false</code> otherwise.
     * 
     * @param series  the series index (zero-based).
     * 
     * @return A boolean.
     */    
    public boolean isSeriesItemLabelsVisible(int series);
    
    /**
     * Sets a flag that controls whether or not the item labels for ALL series
     * are visible.
     * 
     * @param visible  the flag.
     */
    public void setItemLabelsVisible(boolean visible);

    /**
     * Sets a flag that controls whether or not the item labels for ALL series
     * are visible.
     * 
     * @param visible  the flag (<code>null</code> permitted).
     */
    public void setItemLabelsVisible(Boolean visible);

    /**
     * Sets the visibility of item labels for ALL series and, if requested, 
     * sends a {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param visible  a flag that controls whether or not the item labels are
     *                 visible (<code>null</code> permitted).
     * @param notify  a flag that controls whether or not listeners are 
     *                notified.
     */
    public void setItemLabelsVisible(Boolean visible, boolean notify);

    /**
     * Sets a flag that controls the visibility of the item labels for a series.
     * 
     * @param series  the series index (zero-based).
     * @param visible  the flag.
     */
    public void setSeriesItemLabelsVisible(int series, boolean visible);
    
    /**
     * Sets a flag that controls the visibility of the item labels for a series.
     * 
     * @param series  the series index (zero-based).
     * @param visible  the flag (<code>null</code> permitted).
     */
    public void setSeriesItemLabelsVisible(int series, Boolean visible);
    
    /**
     * Sets the visibility of item labels for a series and, if requested, 
     * sends a {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param series  the series index (zero-based).
     * @param visible  the visible flag.
     * @param notify  a flag that controls whether or not listeners are 
     *                notified.
     */
    public void setSeriesItemLabelsVisible(int series, Boolean visible, 
                                           boolean notify);
    
    /**
     * Returns the base setting for item label visibility.
     * 
     * @return A flag (possibly <code>null</code>).
     */
    public Boolean getBaseItemLabelsVisible();
    
    /**
     * Sets the base flag that controls whether or not item labels are visible.
     * 
     * @param visible  the flag.
     */
    public void setBaseItemLabelsVisible(boolean visible);
    
    /**
     * Sets the base setting for item label visibility.
     * 
     * @param visible  the flag (<code>null</code> permitted).
     */
    public void setBaseItemLabelsVisible(Boolean visible);
    
    /**
     * Sets the base visibility for item labels and, if requested, sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param visible  the visibility flag.
     * @param notify  a flag that controls whether or not listeners are
     *                notified.
     */
    public void setBaseItemLabelsVisible(Boolean visible, boolean notify);

    // ITEM LABEL GENERATOR

    /**
     * Returns the item label generator for a data item.
     *
     * @param row  the row index (zero based).
     * @param column  the column index (zero based).
     *
     * @return The generator (possibly <code>null</code>).
     */
    public XYItemLabelGenerator getItemLabelGenerator(int row, int column);
    
    /**
     * Returns the item label generator for a series.
     *
     * @param series  the series index (zero based).
     *
     * @return The generator (possibly <code>null</code>).
     */
    public XYItemLabelGenerator getSeriesItemLabelGenerator(int series);

    /**
     * Sets the item label generator for ALL series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param generator  the generator (<code>null</code> permitted).
     */
    public void setItemLabelGenerator(XYItemLabelGenerator generator);

    /**
     * Sets the item label generator for a series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero based).
     * @param generator  the generator (<code>null</code> permitted).
     */
    public void setSeriesItemLabelGenerator(int series, 
                                            XYItemLabelGenerator generator);

    /**
     * Returns the base item label generator.
     *
     * @return The generator (possibly <code>null</code>).
     */
    public XYItemLabelGenerator getBaseItemLabelGenerator();

    /**
     * Sets the base item label generator and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param generator  the generator (<code>null</code> permitted).
     */
    public void setBaseItemLabelGenerator(XYItemLabelGenerator generator);

    // TOOL TIP GENERATOR

    /**
     * Returns the tool tip generator for a data item.
     *
     * @param row  the row index (zero based).
     * @param column  the column index (zero based).
     *
     * @return The generator (possibly <code>null</code>).
     */
    public XYToolTipGenerator getToolTipGenerator(int row, int column);
    
    /**
     * Returns the tool tip generator for a series.
     *
     * @param series  the series index (zero based).
     *
     * @return The generator (possibly <code>null</code>).
     */
    public XYToolTipGenerator getSeriesToolTipGenerator(int series);

    /**
     * Sets the tool tip generator for ALL series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param generator  the generator (<code>null</code> permitted).
     */
    public void setToolTipGenerator(XYToolTipGenerator generator);

    /**
     * Sets the tool tip generator for a series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param series  the series index (zero based).
     * @param generator  the generator (<code>null</code> permitted).
     */
    public void setSeriesToolTipGenerator(int series,               
                                          XYToolTipGenerator generator);

    /**
     * Returns the base tool tip generator.
     *
     * @return The generator (possibly <code>null</code>).
     */
    public XYToolTipGenerator getBaseToolTipGenerator();

    /**
     * Sets the base tool tip generator and sends a {@link RendererChangeEvent}
     * to all registered listeners.
     *
     * @param generator  the generator (<code>null</code> permitted).
     */
    public void setBaseToolTipGenerator(XYToolTipGenerator generator);

    // URL GENERATOR
    
    /**
     * Returns the URL generator for HTML image maps.
     *
     * @return The URL generator (possibly null).
     */
    public XYURLGenerator getURLGenerator();

    /**
     * Sets the URL generator for HTML image maps.
     *
     * @param urlGenerator the URL generator (null permitted).
     */
    public void setURLGenerator(XYURLGenerator urlGenerator);

    //// ITEM LABEL FONT ///////////////////////////////////////////////////////

    /**
     * Returns the font for an item label.
     * 
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     * 
     * @return The font (never <code>null</code>).
     */
    public Font getItemLabelFont(int row, int column);

    /**
     * Returns the font used for all item labels.  This may be 
     * <code>null</code>, in which case the per series font settings will apply.
     * 
     * @return The font (possibly <code>null</code>).
     */
    public Font getItemLabelFont();
    
    /**
     * Sets the item label font for ALL series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.  You can set 
     * this to <code>null</code> if you prefer to set the font on a per series 
     * basis.
     * 
     * @param font  the font (<code>null</code> permitted).
     */
    public void setItemLabelFont(Font font);
    
    /**
     * Returns the font for all the item labels in a series.
     * 
     * @param series  the series index (zero-based).
     * 
     * @return The font (possibly <code>null</code>).
     */
    public Font getSeriesItemLabelFont(int series);

    /**
     * Sets the item label font for a series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.  
     * 
     * @param series  the series index (zero-based).
     * @param font  the font (<code>null</code> permitted).
     */
    public void setSeriesItemLabelFont(int series, Font font);

    /**
     * Returns the base item label font (this is used when no other font 
     * setting is available).
     * 
     * @return The font (<code>never</code> null).
     */
    public Font getBaseItemLabelFont();

    /**
     * Sets the base item label font and sends a {@link RendererChangeEvent} 
     * to all registered listeners.  
     * 
     * @param font  the font (<code>null</code> not permitted).
     */
    public void setBaseItemLabelFont(Font font);

    //// ITEM LABEL PAINT  /////////////////////////////////////////////////////

    /**
     * Returns the paint used to draw an item label.
     * 
     * @param row  the row index (zero based).
     * @param column  the column index (zero based).
     * 
     * @return The paint (never <code>null</code>).
     */
    public Paint getItemLabelPaint(int row, int column);
    
    /**
     * Returns the paint used for all item labels.  This may be 
     * <code>null</code>, in which case the per series paint settings will 
     * apply.
     * 
     * @return The paint (possibly <code>null</code>).
     */
    public Paint getItemLabelPaint();

    /**
     * Sets the item label paint for ALL series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param paint  the paint (<code>null</code> permitted).
     */
    public void setItemLabelPaint(Paint paint);
    
    /**
     * Returns the paint used to draw the item labels for a series.
     * 
     * @param series  the series index (zero based).
     * 
     * @return The paint (possibly <code>null<code>).
     */
    public Paint getSeriesItemLabelPaint(int series);

    /**
     * Sets the item label paint for a series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param series  the series (zero based index).
     * @param paint  the paint (<code>null</code> permitted).
     */
    public void setSeriesItemLabelPaint(int series, Paint paint);
        
    /**
     * Returns the base item label paint.
     * 
     * @return The paint (never <code>null<code>).
     */
    public Paint getBaseItemLabelPaint();

    /**
     * Sets the base item label paint and sends a {@link RendererChangeEvent} 
     * to all registered listeners.
     * 
     * @param paint  the paint (<code>null</code> not permitted).
     */
    public void setBaseItemLabelPaint(Paint paint);
    
    // POSITIVE ITEM LABEL POSITION...

    /**
     * Returns the item label position for positive values.
     * 
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     * 
     * @return The item label position (never <code>null</code>).
     */
    public ItemLabelPosition getPositiveItemLabelPosition(int row, int column);

    /**
     * Returns the item label position for positive values in ALL series.
     * 
     * @return The item label position (possibly <code>null</code>).
     */
    public ItemLabelPosition getPositiveItemLabelPosition();

    /**
     * Sets the item label position for positive values in ALL series, and 
     * sends a {@link RendererChangeEvent} to all registered listeners.  You 
     * need to set this to <code>null</code> to expose the settings for 
     * individual series.
     * 
     * @param position  the position (<code>null</code> permitted).
     */
    public void setPositiveItemLabelPosition(ItemLabelPosition position);
    
    /**
     * Sets the positive item label position for ALL series and (if requested)
     * sends a {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param position  the position (<code>null</code> permitted).
     * @param notify  notify registered listeners?
     */
    public void setPositiveItemLabelPosition(ItemLabelPosition position, 
                                             boolean notify);

    /**
     * Returns the item label position for all positive values in a series.
     * 
     * @param series  the series index (zero-based).
     * 
     * @return The item label position (never <code>null</code>).
     */
    public ItemLabelPosition getSeriesPositiveItemLabelPosition(int series);
    
    /**
     * Sets the item label position for all positive values in a series and 
     * sends a {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param series  the series index (zero-based).
     * @param position  the position (<code>null</code> permitted).
     */
    public void setSeriesPositiveItemLabelPosition(int series, 
                                                   ItemLabelPosition position);

    /**
     * Sets the item label position for all positive values in a series and (if
     * requested) sends a {@link RendererChangeEvent} to all registered 
     * listeners.
     * 
     * @param series  the series index (zero-based).
     * @param position  the position (<code>null</code> permitted).
     * @param notify  notify registered listeners?
     */
    public void setSeriesPositiveItemLabelPosition(int series, 
                                                   ItemLabelPosition position, 
                                                   boolean notify);

    /**
     * Returns the base positive item label position.
     * 
     * @return The position (never <code>null</code>).
     */
    public ItemLabelPosition getBasePositiveItemLabelPosition();

    /**
     * Sets the base positive item label position.
     * 
     * @param position  the position (<code>null</code> not permitted).
     */
    public void setBasePositiveItemLabelPosition(ItemLabelPosition position);
    
    /**
     * Sets the base positive item label position and, if requested, sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param position  the position (<code>null</code> not permitted).
     * @param notify  notify registered listeners?
     */
    public void setBasePositiveItemLabelPosition(ItemLabelPosition position, 
                                                 boolean notify);

    // NEGATIVE ITEM LABEL POSITION...

    /**
     * Returns the item label position for negative values.  This method can be
     * overridden to provide customisation of the item label position for 
     * individual data items.
     * 
     * @param row  the row index (zero-based).
     * @param column  the column (zero-based).
     * 
     * @return The item label position (never <code>null</code>).
     */
    public ItemLabelPosition getNegativeItemLabelPosition(int row, int column);

    /**
     * Returns the item label position for negative values in ALL series.
     * 
     * @return The item label position (possibly <code>null</code>).
     */
    public ItemLabelPosition getNegativeItemLabelPosition();

    /**
     * Sets the item label position for negative values in ALL series, and 
     * sends a {@link RendererChangeEvent} to all registered listeners.  You 
     * need to set this to <code>null</code> to expose the settings for 
     * individual series.
     * 
     * @param position  the position (<code>null</code> permitted).
     */
    public void setNegativeItemLabelPosition(ItemLabelPosition position);
    
    /**
     * Sets the item label position for negative values in ALL series and (if
     * requested) sends a {@link RendererChangeEvent} to all registered 
     * listeners.  
     * 
     * @param position  the position (<code>null</code> permitted).
     * @param notify  notify registered listeners?
     */
    public void setNegativeItemLabelPosition(ItemLabelPosition position, 
                                             boolean notify);

    /**
     * Returns the item label position for all negative values in a series.
     * 
     * @param series  the series index (zero-based).
     * 
     * @return The item label position (never <code>null</code>).
     */
    public ItemLabelPosition getSeriesNegativeItemLabelPosition(int series);

    /**
     * Sets the item label position for negative values in a series and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param series  the series index (zero-based).
     * @param position  the position (<code>null</code> permitted).
     */
    public void setSeriesNegativeItemLabelPosition(int series, 
                                                   ItemLabelPosition position);
    
    /**
     * Sets the item label position for negative values in a series and (if 
     * requested) sends a {@link RendererChangeEvent} to all registered 
     * listeners.
     * 
     * @param series  the series index (zero-based).
     * @param position  the position (<code>null</code> permitted).
     * @param notify  notify registered listeners?
     */
    public void setSeriesNegativeItemLabelPosition(int series, 
                                                   ItemLabelPosition position, 
                                                   boolean notify);

    /**
     * Returns the base item label position for negative values.
     * 
     * @return The position (never <code>null</code>).
     */
    public ItemLabelPosition getBaseNegativeItemLabelPosition();

    /**
     * Sets the base item label position for negative values and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param position  the position (<code>null</code> not permitted).
     */
    public void setBaseNegativeItemLabelPosition(ItemLabelPosition position);
    
    /**
     * Sets the base negative item label position and, if requested, sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param position  the position (<code>null</code> not permitted).
     * @param notify  notify registered listeners?
     */
    public void setBaseNegativeItemLabelPosition(ItemLabelPosition position, 
                                                 boolean notify);

    /**
     * Adds an annotation and sends a {@link RendererChangeEvent} to all 
     * registered listeners.  The annotation is added to the foreground
     * layer.
     * 
     * @param annotation  the annotation (<code>null</code> not permitted).
     */
    public void addAnnotation(XYAnnotation annotation);

    /**
     * Adds an annotation to the specified layer.
     * 
     * @param annotation  the annotation (<code>null</code> not permitted).
     * @param layer  the layer (<code>null</code> not permitted).
     */
    public void addAnnotation(XYAnnotation annotation, Layer layer);

    /**
     * Removes the specified annotation and sends a {@link RendererChangeEvent}
     * to all registered listeners.
     * 
     * @param annotation  the annotation to remove (<code>null</code> not 
     *                    permitted).
     * 
     * @return A boolean to indicate whether or not the annotation was 
     *         successfully removed.
     */
    public boolean removeAnnotation(XYAnnotation annotation);
    
    /**
     * Removes all annotations and sends a {@link RendererChangeEvent}
     * to all registered listeners.
     */
    public void removeAnnotations();
    
    /**
     * Draws all the annotations for the specified layer.
     * 
     * @param g2  the graphics device.
     * @param dataArea  the data area.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param layer  the layer.
     * @param info  the plot rendering info.
     */
    public void drawAnnotations(Graphics2D g2, 
                                Rectangle2D dataArea, 
                                ValueAxis domainAxis, 
                                ValueAxis rangeAxis, 
                                Layer layer, 
                                PlotRenderingInfo info);
    
    /**
     * Called for each item to be plotted.
     * <p>
     * The {@link XYPlot} can make multiple passes through the dataset, 
     * depending on the value returned by the renderer's initialise() method.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area within which the data is being rendered.
     * @param info  collects drawing info.
     * @param plot  the plot (can be used to obtain standard color 
     *              information etc).
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     * @param crosshairState  crosshair information for the plot 
     *                        (<code>null</code> permitted).
     * @param pass  the pass index.
     */
    public void drawItem(Graphics2D g2,
                         XYItemRendererState state,
                         Rectangle2D dataArea,
                         PlotRenderingInfo info,
                         XYPlot plot,
                         ValueAxis domainAxis,
                         ValueAxis rangeAxis,
                         XYDataset dataset,
                         int series,
                         int item,
                         CrosshairState crosshairState,
                         int pass);

    /**
     * Returns a legend item for a series from a dataset.
     *
     * @param datasetIndex  the dataset index.
     * @param series  the series (zero-based index).
     *
     * @return The legend item (possibly <code>null</code>).
     */
    public LegendItem getLegendItem(int datasetIndex, int series);

    /**
     * Returns the legend item label generator.
     * 
     * @return The legend item label generator (never <code>null</code>).
     */
    public XYSeriesLabelGenerator getLegendItemLabelGenerator();
    
    /**
     * Sets the legend item label generator.
     * 
     * @param generator  the generator (<code>null</code> not permitted).
     */
    public void setLegendItemLabelGenerator(XYSeriesLabelGenerator generator);

        /**
     * Fills a band between two values on the axis.  This can be used to color 
     * bands between the grid lines.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the domain axis.
     * @param dataArea  the data area.
     * @param start  the start value.
     * @param end  the end value.
     */
    public void fillDomainGridBand(Graphics2D g2,
                                   XYPlot plot,
                                   ValueAxis axis,
                                   Rectangle2D dataArea,
                                   double start, double end);

    /**
     * Fills a band between two values on the range axis.  This can be used to 
     * color bands between the grid lines.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the range axis.
     * @param dataArea  the data area.
     * @param start  the start value.
     * @param end  the end value.
     */
    public void fillRangeGridBand(Graphics2D g2,
                                  XYPlot plot,
                                  ValueAxis axis,
                                  Rectangle2D dataArea,
                                  double start, double end);

    /**
     * Draws a grid line against the domain axis.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the value axis.
     * @param dataArea  the area for plotting data (not yet adjusted for any 
     *                  3D effect).
     * @param value  the value.
     */
    public void drawDomainGridLine(Graphics2D g2,
                                   XYPlot plot,
                                   ValueAxis axis,
                                   Rectangle2D dataArea,
                                   double value);

    /**
     * Draws a grid line against the range axis.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the value axis.
     * @param dataArea  the area for plotting data (not yet adjusted for any 
     *                  3D effect).
     * @param value  the value.
     * @param paint  the paint (<code>null</code> not permitted).
     * @param stroke  the stroke (<code>null</code> not permitted).
     */
    public void drawRangeLine(Graphics2D g2,
                              XYPlot plot,
                              ValueAxis axis,
                              Rectangle2D dataArea,
                              double value,
                              Paint paint,
                              Stroke stroke);

    /**
     * Draws the specified <code>marker</code> against the domain axis.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the value axis.
     * @param marker  the marker.
     * @param dataArea  the axis data area.
     */
    public void drawDomainMarker(Graphics2D g2,
                                 XYPlot plot,
                                 ValueAxis axis,
                                 Marker marker,
                                 Rectangle2D dataArea);

    /**
     * Draws a horizontal line across the chart to represent a 'range marker'.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the value axis.
     * @param marker  the marker line.
     * @param dataArea  the axis data area.
     */
    public void drawRangeMarker(Graphics2D g2,
                                XYPlot plot,
                                ValueAxis axis,
                                Marker marker,
                                Rectangle2D dataArea);

    /**
     * Returns the plot that this renderer has been assigned to.
     *
     * @return The plot.
     */
    public XYPlot getPlot();

    /**
     * Sets the plot that this renderer is assigned to.  This method will be 
     * called by the plot class...you do not need to call it yourself.
     *
     * @param plot  the plot.
     */
    public void setPlot(XYPlot plot);
    
    /**
     * Returns the lower and upper bounds (range) of the x-values in the 
     * specified dataset.
     * 
     * @param dataset  the dataset (<code>null</code> permitted).
     * 
     * @return The range.
     */
    public Range findDomainBounds(XYDataset dataset);
    
    /**
     * Returns the lower and upper bounds (range) of the y-values in the
     * specified dataset.  The implementation of this method will take 
     * into account the presentation used by the renderers (for example,
     * a renderer that "stacks" values will return a bigger range than
     * a renderer that doesn't.
     * 
     * @param dataset  the dataset (<code>null</code> permitted).
     * 
     * @return The range (or <code>null</code> if the dataset is 
     *         <code>null</code> or empty).
     */
    public Range findRangeBounds(XYDataset dataset);
    
    /**
     * Add a renderer change listener.
     * 
     * @param listener  the listener.
     */
    public void addChangeListener(RendererChangeListener listener);

    /**
     * Removes a change listener.
     * 
     * @param listener  the listener.
     */
    public void removeChangeListener(RendererChangeListener listener);
    
}
