categoryitemrenderer.java

这是一个segy数据显示程序

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * -------------------------
 * CategoryItemRenderer.java
 * -------------------------
 *
 * (C) Copyright 2001-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Mark Watson (www.markwatson.com);
 *
 * $Id: CategoryItemRenderer.java,v 1.40 2004/05/24 15:28:42 mungady Exp $
 *
 * Changes
 * -------
 * 23-Oct-2001 : Version 1 (DG);
 * 16-Jan-2002 : Renamed HorizontalCategoryItemRenderer.java --> CategoryItemRenderer.java (DG);
 * 05-Feb-2002 : Changed return type of the drawCategoryItem method from void to Shape, as part
 *               of the tooltips implementation (DG)
 *
 *               NOTE (30-May-2002) : this has subsequently been changed back to void, tooltips
 *               are now collected along with entities in ChartRenderingInfo (DG);
 *
 * 14-Mar-2002 : Added the initialise method, and changed all bar plots to use this renderer (DG);
 * 23-May-2002 : Added ChartRenderingInfo to the initialise method (DG);
 * 29-May-2002 : Added the getAxisArea(Rectangle2D) method (DG);
 * 06-Jun-2002 : Updated Javadoc comments (DG);
 * 26-Jun-2002 : Added range axis to the initialise method (DG);
 * 24-Sep-2002 : Added getLegendItem(...) method (DG);
 * 23-Oct-2002 : Added methods to get/setToolTipGenerator (DG);
 * 05-Nov-2002 : Replaced references to CategoryDataset with TableDataset (DG);
 * 06-Nov-2002 : Added the domain axis to the drawCategoryItem method.  Renamed
 *               drawCategoryItem(...) --> drawItem(...) (DG);
 * 20-Nov-2002 : Changed signature of drawItem(...) method to reflect use of TableDataset (DG);
 * 26-Nov-2002 : Replaced the isStacked() method with the getRangeType() method (DG);
 * 08-Jan-2003 : Changed getSeriesCount() --> getRowCount() and
 *               getCategoryCount() --> getColumnCount() (DG);
 * 09-Jan-2003 : Changed name of grid-line methods (DG);
 * 21-Jan-2003 : Merged TableDataset with CategoryDataset (DG);
 * 10-Apr-2003 : Changed CategoryDataset to KeyedValues2DDataset in drawItem(...) method (DG);
 * 29-Apr-2003 : Eliminated Renderer interface (DG);
 * 02-Sep-2003 : Fix for bug 790407 (DG);
 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 20-Oct-2003 : Added setOutlinePaint(...) method (DG);
 * 06-Feb-2004 : Added missing methods, and moved deprecated methods (DG);
 * 19-Feb-2004 : Added extra setXXXLabelsVisible() methods (DG);
 * 29-Apr-2004 : Changed Integer --> int in initialise() method (DG);
 * 18-May-2004 : Added methods for item label paint (DG);
 *
 */

package org.jfree.chart.renderer;

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.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.event.RendererChangeListener;
import org.jfree.chart.labels.CategoryLabelGenerator;
import org.jfree.chart.labels.CategoryToolTipGenerator;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.Marker;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.urls.CategoryURLGenerator;
import org.jfree.data.CategoryDataset;
import org.jfree.data.Range;
import org.jfree.ui.TextAnchor;

/**
 * A plug-in object that is used by the {@link CategoryPlot} class to display individual data items
 * from a {@link CategoryDataset}.
 * <p>
 * This interface defines the methods that must be provided by all renderers.  If you are
 * implementing a custom renderer, you should consider extending the
 * {@link AbstractCategoryItemRenderer} class.
 * <p>
 * Most renderer attributes are defined using a "three layer" approach.  When looking up an
 * attribute (for example, the outline paint) the renderer first checks to see if there is
 * a setting (in layer 0) that applies to ALL items that the renderer draws.  If there is,
 * that setting is used, but if it is <code>null</code> the renderer looks up the next layer,
 * which contains "per series" settings for the attribute (many attributes are defined on a
 * per series basis, so this is the layer that is most commonly used).  If the layer 1 setting
 * is <code>null</code>, the renderer will look up the final layer, which provides a default
 * or "base" setting.  Some attributes allow the base setting to be <code>null</code>, while
 * other attributes enforce non-<code>null</code> values.
 *   
 */
public interface CategoryItemRenderer {

    /**
     * Returns the plot that the renderer has been assigned to (where <code>null</code> indicates
     * that the renderer is not currently assigned to a plot).
     *
     * @return The plot (possibly <code>null</code>).
     */
    public CategoryPlot getPlot();

    /**
     * Sets the plot that the renderer has been assigned to.  This method is usually called
     * by the {@link CategoryPlot}, in normal usage you shouldn't need to call this method 
     * directly.
     *
     * @param plot  the plot (<code>null</code> not permitted).
     */
    public void setPlot(CategoryPlot plot);

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

    /**
     * Returns the range of values the renderer requires to display all the items from the
     * specified dataset.
     * 
     * @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 getRangeExtent(CategoryDataset dataset);
    
    /**
     * Initialises the renderer.  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 rendererIndex  the renderer index.
     * @param info  collects chart rendering information for return to caller.
     * 
     * @return A state object (maintains state information relevant to one chart drawing).
     */
    public CategoryItemRendererState initialise(Graphics2D g2,
                                                Rectangle2D dataArea,
                                                CategoryPlot plot,
                                                int rendererIndex,
                                                PlotRenderingInfo info);
                           
    //// 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);

    /**
     * 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);
    
    /**
     * 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 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);

    /**
     * Sets the outline paint for ALL series (optional).
     * 
     * @param paint  the paint (<code>null</code> permitted).
     */
    public void setOutlinePaint(Paint paint);
    
    /**
     * 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);

    /**
     * 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);

    /**
     * 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);

    /**
     * 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 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.
     * <p>
     * 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);

    /**
     * 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);
    
    /**
     * 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 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);

    /**
     * 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);
    
    /**
     * Returns a shape used to represent the items in a series.
     *