xytextannotation.java

用于制作报表的中间件控件,纯java编写,还附带有数据库操作的源代码

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2007, 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.]
 *
 * ---------------------
 * XYTextAnnotation.java
 * ---------------------
 * (C) Copyright 2002-2007, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 28-Aug-2002 : Version 1 (DG);
 * 07-Nov-2002 : Fixed errors reported by Checkstyle (DG);
 * 13-Jan-2003 : Reviewed Javadocs (DG);
 * 26-Mar-2003 : Implemented Serializable (DG);
 * 02-Jul-2003 : Added new text alignment and rotation options (DG);
 * 19-Aug-2003 : Implemented Cloneable (DG);
 * 17-Jan-2003 : Added fix for bug 878706, where the annotation is placed 
 *               incorrectly for a plot with horizontal orientation (thanks to
 *               Ed Yu for the fix) (DG);
 * 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 26-Jan-2006 : Fixed equals() method (bug 1415480) (DG);
 * 06-Mar-2007 : Added argument checks, re-implemented hashCode() method (DG);
 *
 */

package org.jfree.chart.annotations;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.jfree.chart.HashUtilities;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.io.SerialUtilities;
import org.jfree.text.TextUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.TextAnchor;
import org.jfree.util.PaintUtilities;
import org.jfree.util.PublicCloneable;

/**
 * A text annotation that can be placed at a particular (x, y) location on an 
 * {@link XYPlot}.
 */
public class XYTextAnnotation extends AbstractXYAnnotation
                              implements Cloneable, PublicCloneable, 
                                         Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -2946063342782506328L;
    
    /** The default font. */
    public static final Font DEFAULT_FONT = new Font("SansSerif", Font.PLAIN, 
            10);

    /** The default paint. */
    public static final Paint DEFAULT_PAINT = Color.black;
    
    /** The default text anchor. */
    public static final TextAnchor DEFAULT_TEXT_ANCHOR = TextAnchor.CENTER;

    /** The default rotation anchor. */    
    public static final TextAnchor DEFAULT_ROTATION_ANCHOR = TextAnchor.CENTER;
    
    /** The default rotation angle. */
    public static final double DEFAULT_ROTATION_ANGLE = 0.0;

    /** The text. */
    private String text;

    /** The font. */
    private Font font;

    /** The paint. */
    private transient Paint paint;
    
    /** The x-coordinate. */
    private double x;

    /** The y-coordinate. */
    private double y;

    /** The text anchor (to be aligned with (x, y)). */
    private TextAnchor textAnchor;
    
    /** The rotation anchor. */
    private TextAnchor rotationAnchor;
    
    /** The rotation angle. */
    private double rotationAngle;
    
    /**
     * Creates a new annotation to be displayed at the given coordinates.  The
     * coordinates are specified in data space (they will be converted to 
     * Java2D space for display).
     *
     * @param text  the text (<code>null</code> not permitted).
     * @param x  the x-coordinate (in data space).
     * @param y  the y-coordinate (in data space).
     */
    public XYTextAnnotation(String text, double x, double y) {
        if (text == null) {
            throw new IllegalArgumentException("Null 'text' argument.");
        }
        this.text = text;
        this.font = DEFAULT_FONT;
        this.paint = DEFAULT_PAINT;
        this.x = x;
        this.y = y;
        this.textAnchor = DEFAULT_TEXT_ANCHOR;
        this.rotationAnchor = DEFAULT_ROTATION_ANCHOR;
        this.rotationAngle = DEFAULT_ROTATION_ANGLE;
    }
    
    /**
     * Returns the text for the annotation.
     *
     * @return The text (never <code>null</code>).
     * 
     * @see #setText(String)
     */
    public String getText() {
        return this.text;
    }

    /**
     * Sets the text for the annotation.
     * 
     * @param text  the text (<code>null</code> not permitted).
     * 
     * @see #getText()
     */
    public void setText(String text) {
        if (text == null) {
            throw new IllegalArgumentException("Null 'text' argument.");
        }
        this.text = text;
    }
    
    /**
     * Returns the font for the annotation.
     *
     * @return The font (never <code>null</code>).
     * 
     * @see #setFont(Font)
     */
    public Font getFont() {
        return this.font;
    }

    /**
     * Sets the font for the annotation.
     * 
     * @param font  the font (<code>null</code> not permitted).
     * 
     * @see #getFont()
     */
    public void setFont(Font font) {
        if (font == null) {
            throw new IllegalArgumentException("Null 'font' argument.");
        }
        this.font = font;
    }
    
    /**
     * Returns the paint for the annotation.
     *
     * @return The paint (never <code>null</code>).
     * 
     * @see #setPaint(Paint)
     */
    public Paint getPaint() {
        return this.paint;
    }
    
    /**
     * Sets the paint for the annotation.
     * 
     * @param paint  the paint (<code>null</code> not permitted).
     * 
     * @see #getPaint()
     */
    public void setPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.paint = paint;
    }

    /**
     * Returns the text anchor.
     * 
     * @return The text anchor (never <code>null</code>).
     * 
     * @see #setTextAnchor(TextAnchor)
     */
    public TextAnchor getTextAnchor() {
        return this.textAnchor;
    }
    
    /**
     * Sets the text anchor (the point on the text bounding rectangle that is 
     * aligned to the (x, y) coordinate of the annotation).
     * 
     * @param anchor  the anchor point (<code>null</code> not permitted).
     * 
     * @see #getTextAnchor()
     */
    public void setTextAnchor(TextAnchor anchor) {
        if (anchor == null) {
            throw new IllegalArgumentException("Null 'anchor' argument.");
        }
        this.textAnchor = anchor;
    }