www.pudn.com > jfreechart-0.9.12.zip > XYTextAnnotation.java

/* ====================================== 
 * JFreeChart : a free Java chart library 
 * ====================================== 
 * 
 * Project Info:  http://www.jfree.org/jfreechart/index.html 
 * Project Lead:  David Gilbert (david.gilbert@object-refinery.com); 
 * 
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors. 
 * 
 * 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. 
 * 
 * --------------------- 
 * XYTextAnnotation.java 
 * --------------------- 
 * (C) Copyright 2002, 2003 by Object Refinery Limited. 
 * 
 * Original Author:  David Gilbert (for Object Refinery Limited); 
 * Contributor(s):   -; 
 * 
 * $Id: XYTextAnnotation.java,v 1.7 2003/08/20 11:34:36 mungady Exp $ 
 * 
 * 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); 
 * 
 */ 
 
package org.jfree.chart.annotations; 
 
import java.awt.Graphics2D; 
import java.awt.geom.Rectangle2D; 
import java.io.Serializable; 
 
import org.jfree.chart.axis.ValueAxis; 
import org.jfree.chart.plot.Plot; 
import org.jfree.chart.plot.PlotOrientation; 
import org.jfree.chart.plot.XYPlot; 
import org.jfree.ui.RectangleEdge; 
import org.jfree.ui.RefineryUtilities; 
 
/** 
 * A text annotation that can be placed at a particular (x, y) location on an {@link XYPlot}. 
 * 
 * @author David Gilbert 
 */ 
public class XYTextAnnotation extends TextAnnotation 
                              implements XYAnnotation, Cloneable, Serializable { 
 
    /** The x-coordinate. */ 
    private double x; 
 
    /** The y-coordinate. */ 
    private double y; 
     
    /** 
     * Creates a new annotation to be displayed at the given coordinates. 
     * 
     * @param text  the text. 
     * @param x  the x-coordinate. 
     * @param y  the y-coordinate. 
     */ 
    public XYTextAnnotation(String text, double x, double y) { 
        super(text); 
        this.x = x; 
        this.y = y; 
    } 
     
    /** 
     * Returns the x coordinate for the text anchor point (measured against the domain axis). 
     *  
     * @return The x coordinate. 
     */ 
    public double getX() { 
        return this.x; 
    } 
     
    /** 
     * Sets the x coordinate for the text anchor point (measured against the domain axis). 
     *  
     * @param x  the x coordinate. 
     */ 
    public void setX(double x) { 
        this.x = x; 
    } 
     
    /** 
     * Returns the y coordinate for the text anchor point (measured against the range axis). 
     *  
     * @return The y coordinate. 
     */ 
    public double getY() { 
        return this.y; 
    } 
     
    /** 
     * Sets the y coordinate for the text anchor point (measured against the range axis). 
     *  
     * @param y  the y coordinate. 
     */ 
    public void setY(double y) { 
        this.y = y; 
    }     
 
    /** 
     * Draws the annotation. 
     * 
     * @param g2  the graphics device. 
     * @param plot  the plot. 
     * @param dataArea  the data area. 
     * @param domainAxis  the domain axis. 
     * @param rangeAxis  the range axis. 
     */ 
    public void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea, 
                     ValueAxis domainAxis, ValueAxis rangeAxis) { 
 
        PlotOrientation orientation = plot.getOrientation(); 
        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(plot.getDomainAxisLocation(),  
                                                                  orientation); 
        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(plot.getRangeAxisLocation(),  
                                                                orientation); 
 
        float anchorX = (float) domainAxis.translateValueToJava2D(this.x, dataArea, domainEdge); 
        float anchorY = (float) rangeAxis.translateValueToJava2D(this.y, dataArea, rangeEdge); 
 
        g2.setFont(getFont()); 
        g2.setPaint(getPaint()); 
        RefineryUtilities.drawRotatedString( 
            getText(),  
            g2, 
            anchorX,  
            anchorY, 
            getTextAnchor(), 
            getRotationAnchor(), 
            getRotationAngle() 
        ); 
 
    } 
     
    /** 
     * Returns a clone of the annotation. 
     *  
     * @return A clone. 
     *  
     * @throws CloneNotSupportedException  if the annotation can't be cloned. 
     */ 
    public Object clone() throws CloneNotSupportedException { 
        return super.clone(); 
    } 
 
 
}