de.berlios.statcvs.xml.chart.SymbolicNameAnnotation.java Source code

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Here is the source code for de.berlios.statcvs.xml.chart.SymbolicNameAnnotation.java

Source

/*
 *  StatCvs-XML - XML output for StatCvs.
 *
 *  Copyright by Steffen Pingel, Tammo van Lessen.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  version 2 as published by the Free Software Foundation.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

package de.berlios.statcvs.xml.chart;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;

import net.sf.statcvs.model.SymbolicName;

import org.jfree.chart.annotations.XYAnnotation;
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;
import org.jfree.ui.TextAnchor;

/**
 * SymbolicNameAnnotation
 * 
 * Provides symbolic name annotations for XYPlots with java.util.Date
 * objects on the domain axis.
 * 
 * @author Tammo van Lessen
 */
public class SymbolicNameAnnotation implements XYAnnotation {

    private final Color linePaint = Color.GRAY;
    private final Color textPaint = Color.DARK_GRAY;
    private final Stroke stroke = new BasicStroke(1.5f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10f,
            new float[] { 3.5f }, 0.0f);
    private final Font font = new Font("Dialog", Font.PLAIN, 9);

    private SymbolicName symbolicName;

    /**
     * Creates an annotation for a symbolic name.
     * Paints a gray dashed vertical line at the symbolic names
     * date position and draws its name at the top left.
     * 
     * @param symbolicName
     */
    public SymbolicNameAnnotation(SymbolicName symbolicName) {
        this.symbolicName = symbolicName;
    }

    /**
     * @see org.jfree.chart.annotations.XYAnnotation#draw(java.awt.Graphics2D, org.jfree.chart.plot.XYPlot, java.awt.geom.Rectangle2D, org.jfree.chart.axis.ValueAxis, org.jfree.chart.axis.ValueAxis)
     */
    public void draw(Graphics2D g2d, XYPlot xyPlot, Rectangle2D dataArea, ValueAxis domainAxis,
            ValueAxis rangeAxis) {
        PlotOrientation orientation = xyPlot.getOrientation();

        // don't draw the annotation if symbolic names date is out of axis' bounds.
        if (domainAxis.getUpperBound() < symbolicName.getDate().getTime()
                || domainAxis.getLowerBound() > symbolicName.getDate().getTime()) {

            return;
        }

        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(xyPlot.getDomainAxisLocation(), orientation);
        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(xyPlot.getRangeAxisLocation(), orientation);

        float x = (float) domainAxis.translateValueToJava2D(symbolicName.getDate().getTime(), dataArea, domainEdge);
        float y1 = (float) rangeAxis.translateValueToJava2D(rangeAxis.getUpperBound(), dataArea, rangeEdge);
        float y2 = (float) rangeAxis.translateValueToJava2D(rangeAxis.getLowerBound(), dataArea, rangeEdge);

        g2d.setPaint(linePaint);
        g2d.setStroke(stroke);

        Line2D line = new Line2D.Float(x, y1, x, y2);
        g2d.draw(line);

        float anchorX = x;
        float anchorY = y1 + 2;

        g2d.setFont(font);
        g2d.setPaint(textPaint);

        /*g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, 
                         RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);*/

        RefineryUtilities.drawRotatedString(symbolicName.getName(), g2d, anchorX, anchorY, TextAnchor.BOTTOM_RIGHT,
                TextAnchor.BOTTOM_RIGHT, -Math.PI / 2);
    }

}