abstractrenderer.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.]
 *
 * ---------------------
 * AbstractRenderer.java
 * ---------------------
 * (C) Copyright 2002-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Nicolas Brodu;
 *
 * $Id: AbstractRenderer.java,v 1.48 2004/05/28 08:26:51 mungady Exp $
 *
 * Changes:
 * --------
 * 22-Aug-2002 : Version 1, draws code out of AbstractXYItemRenderer to share with
 *               AbstractCategoryItemRenderer (DG);
 * 01-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 06-Nov-2002 : Moved to the com.jrefinery.chart.renderer package (DG);
 * 21-Nov-2002 : Added a paint table for the renderer to use (DG);
 * 17-Jan-2003 : Moved plot classes into a separate package (DG);
 * 25-Mar-2003 : Implemented Serializable (DG);
 * 29-Apr-2003 : Added valueLabelFont and valueLabelPaint attributes, based on code from
 *               Arnaud Lelievre (DG);
 * 29-Jul-2003 : Amended code that doesn't compile with JDK 1.2.2 (DG);
 * 13-Aug-2003 : Implemented Cloneable (DG);
 * 15-Sep-2003 : Fixed serialization (NB);
 * 17-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 07-Oct-2003 : Moved PlotRenderingInfo into RendererState to allow for multiple threads
 *               using a single renderer (DG);
 * 20-Oct-2003 : Added missing setOutlinePaint(...) method (DG);
 * 23-Oct-2003 : Split item label attributes into 'positive' and 'negative' values (DG);
 * 26-Nov-2003 : Added methods to get the positive and negative item label positions (DG);
 * 01-Mar-2004 : Modified readObject() method to prevent null pointer exceptions after
 *               deserialization (DG);
 * 
 */

package org.jfree.chart.renderer;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import javax.swing.event.EventListenerList;

import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.event.RendererChangeListener;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.plot.DrawingSupplier;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.TextAnchor;
import org.jfree.util.BooleanList;
import org.jfree.util.BooleanUtils;
import org.jfree.util.NumberUtils;
import org.jfree.util.ObjectList;
import org.jfree.util.ObjectUtils;
import org.jfree.util.PaintList;
import org.jfree.util.ShapeList;
import org.jfree.util.ShapeUtils;
import org.jfree.util.StrokeList;

/**
 * Base class providing common services for renderers.  Most methods that update attributes of the
 * renderer will fire a {@link RendererChangeEvent}, which normally means the plot that owns
 * the renderer will receive notification that the renderer has been changed (the plot will, in 
 * turn, notify the chart).
 */
public abstract class AbstractRenderer implements Cloneable, Serializable {

    /** A useful constant. */
    public static final Double ZERO = new Double(0.0);
    
    /** The default paint. */
    public static final Paint DEFAULT_PAINT = Color.blue;

    /** The default outline paint. */
    public static final Paint DEFAULT_OUTLINE_PAINT = Color.gray;

    /** The default stroke. */
    public static final Stroke DEFAULT_STROKE = new BasicStroke(1.0f);

    /** The default outline stroke. */
    public static final Stroke DEFAULT_OUTLINE_STROKE = new BasicStroke(1.0f);

    /** The default shape. */
    public static final Shape DEFAULT_SHAPE = new Rectangle2D.Double(-3.0, -3.0, 6.0, 6.0);

    /** The default value label font. */
    public static final Font DEFAULT_VALUE_LABEL_FONT = new Font("SansSerif", Font.PLAIN, 10);

    /** The default value label paint. */
    public static final Paint DEFAULT_VALUE_LABEL_PAINT = Color.black;

    /** The paint for ALL series (optional). */
    private transient Paint paint;

    /** The paint list. */
    private PaintList paintList;

    /** The base paint. */
    private transient Paint basePaint;

    /** The outline paint for ALL series (optional). */
    private transient Paint outlinePaint;

    /** The outline paint list. */
    private PaintList outlinePaintList;

    /** The base outline paint. */
    private transient Paint baseOutlinePaint;

    /** The stroke for ALL series (optional). */
    private transient Stroke stroke;

    /** The stroke list. */
    private StrokeList strokeList;

    /** The base stroke. */
    private transient Stroke baseStroke;

    /** The outline stroke for ALL series (optional). */
    private transient Stroke outlineStroke;

    /** The outline stroke list. */
    private StrokeList outlineStrokeList;

    /** The base outline stroke. */
    private transient Stroke baseOutlineStroke;

    /** The shape for ALL series (optional). */
    private transient Shape shape;

    /** A shape list. */
    private ShapeList shapeList;

    /** The base shape. */
    private transient Shape baseShape;

    /** Visibility of the item labels for ALL series (optional). */
    private Boolean itemLabelsVisible;

    /** Visibility of the item labels PER series. */
    private BooleanList itemLabelsVisibleList;

    /** The base item labels visible. */
    private Boolean baseItemLabelsVisible;

    /** The item label font for ALL series (optional). */
    private Font itemLabelFont;

    /** The item label font list (one font per series). */
    private ObjectList itemLabelFontList;

    /** The base item label font. */
    private Font baseItemLabelFont;

    /** The item label paint for ALL series. */
    private transient Paint itemLabelPaint;

    /** The item label paint list (one paint per series). */
    private PaintList itemLabelPaintList;

    /** The base item label paint. */
    private transient Paint baseItemLabelPaint;

    /** The positive item label position for ALL series (optional). */
    private ItemLabelPosition positiveItemLabelPosition;
    
    /** The positive item label position (per series). */
    private ObjectList positiveItemLabelPositionList;
    
    /** The fallback positive item label position. */
    private ItemLabelPosition basePositiveItemLabelPosition;
    
    /** The negative item label position for ALL series (optional). */
    private ItemLabelPosition negativeItemLabelPosition;
    
    /** The negative item label position (per series). */
    private ObjectList negativeItemLabelPositionList;
    
    /** The fallback negative item label position. */
    private ItemLabelPosition baseNegativeItemLabelPosition;

    /** The item label anchor offset. */
    private double itemLabelAnchorOffset = 2.0;

    /** Storage for registered change listeners. */
    private transient EventListenerList listenerList;

    /**
     * Default constructor.
     */
    public AbstractRenderer() {

        this.paint = null;
        this.paintList = new PaintList();
        this.basePaint = DEFAULT_PAINT;

        this.outlinePaint = null;
        this.outlinePaintList = new PaintList();
        this.baseOutlinePaint = DEFAULT_OUTLINE_PAINT;

        this.stroke = null;
        this.strokeList = new StrokeList();
        this.baseStroke = DEFAULT_STROKE;

        this.outlineStroke = null;
        this.outlineStrokeList = new StrokeList();
        this.baseOutlineStroke = DEFAULT_OUTLINE_STROKE;

        this.shape = null;
        this.shapeList = new ShapeList();
        this.baseShape = DEFAULT_SHAPE;

        this.itemLabelsVisible = null;
        this.itemLabelsVisibleList = new BooleanList();
        this.baseItemLabelsVisible = Boolean.FALSE;

        this.itemLabelFont = null;
        this.itemLabelFontList = new ObjectList();
        this.baseItemLabelFont = new Font("SansSerif", Font.PLAIN, 10);

        this.itemLabelPaint = null;
        this.itemLabelPaintList = new PaintList();
        this.baseItemLabelPaint = Color.black;

        this.positiveItemLabelPosition = null;
        this.positiveItemLabelPositionList = new ObjectList();
        this.basePositiveItemLabelPosition = new ItemLabelPosition(
            ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER
        );
        
        this.negativeItemLabelPosition = null;
        this.negativeItemLabelPositionList = new ObjectList();
        this.baseNegativeItemLabelPosition = new ItemLabelPosition(
            ItemLabelAnchor.OUTSIDE6, TextAnchor.TOP_CENTER
        );

        this.listenerList = new EventListenerList();

    }

    /**
     * Returns the drawing supplier from the plot.
     * 
     * @return The drawing supplier.
     */
    public abstract DrawingSupplier getDrawingSupplier();
    
    // PAINT
    
    /**
     * Returns the paint used to fill data items as they are drawn.
     * <p>
     * The default implementation passes control to the <code>getSeriesPaint</code> 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 paint (never <code>null</code>).
     */
    public Paint getItemPaint(int row, int column) {
        return getSeriesPaint(row);
    }

    /**
     * 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) {

        // return the override, if there is one...
        if (this.paint != null) {
            return this.paint;
        }

        // otherwise look up the paint list
        Paint seriesPaint = this.paintList.getPaint(series);
        if (seriesPaint == null) {
            DrawingSupplier supplier = getDrawingSupplier();
            if (supplier != null) {
                seriesPaint = supplier.getNextPaint();
                this.paintList.setPaint(series, seriesPaint);
            }
            else {
                seriesPaint = this.basePaint;
            }
        }
        return seriesPaint;

    }

    /**
     * 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) {
        setPaint(paint, true);
    }
    
    /**
     * Sets the paint to be used for all series and, if requested, sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param paint  the paint (<code>null</code> permitted).
     * @param notify  notify listeners?
     */
    public void setPaint(Paint paint, boolean notify) {
        this.paint = paint;
        if (notify) {
            notifyListeners(new RendererChangeEvent(this));
        }
    }
    
    /**
     * 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) {
        setSeriesPaint(series, paint, true);
    }
    
    /**
     * Sets the paint used for a series and, if requested, sends a {@link RendererChangeEvent} to
     * all registered listeners.
     * 
     * @param series  the series index.
     * @param paint  the paint (<code>null</code> permitted).
     * @param notify  notify listeners?
     */
    public void setSeriesPaint(int series, Paint paint, boolean notify) {
        this.paintList.setPaint(series, paint);       
        if (notify) {
            notifyListeners(new RendererChangeEvent(this));
        }
    }