net.sf.fspdfs.chartthemes.spring.ScaledDialScale.java Source code

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Here is the source code for net.sf.fspdfs.chartthemes.spring.ScaledDialScale.java

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/*
 * fspdfs - Free Java Reporting Library.
 * Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of fspdfs.
 *
 * fspdfs 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 3 of the License, or
 * (at your option) any later version.
 *
 * fspdfs 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 fspdfs. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.fspdfs.chartthemes.spring;

import java.awt.BasicStroke;
import java.awt.Graphics2D;
import java.awt.Stroke;
import java.awt.geom.Arc2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

import net.sf.fspdfs.engine.JRConstants;

import org.jfree.chart.plot.dial.DialPlot;
import org.jfree.chart.plot.dial.StandardDialScale;
import org.jfree.text.TextUtilities;
import org.jfree.ui.TextAnchor;

/**
 * @author sanda zaharia (shertage@users.sourceforge.net)
 * @version $Id:ScaledDialScale.java 2595 2009-02-10 17:56:51Z teodord $
 */
public class ScaledDialScale extends StandardDialScale {
    private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;

    /**
     * 
     */
    public ScaledDialScale() {
        super();
    }

    /**
     * @param lowerBound
     * @param upperBound
     * @param startAngle
     * @param extent
     * @param majorTickIncrement
     * @param minorTickCount
     */
    public ScaledDialScale(double lowerBound, double upperBound, double startAngle, double extent,
            double majorTickIncrement, int minorTickCount) {
        super(lowerBound, upperBound, startAngle, extent, majorTickIncrement, minorTickCount);
    }

    /**
     * Draws the scale on the dial plot.
     *
     * @param g2  the graphics target (<code>null</code> not permitted).
     * @param plot  the dial plot (<code>null</code> not permitted).
     * @param frame  the reference frame that is used to construct the
     *     geometry of the plot (<code>null</code> not permitted).
     * @param view  the visible part of the plot (<code>null</code> not 
     *     permitted).
     */
    public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

        Rectangle2D arcRect = DialPlot.rectangleByRadius(frame, this.getTickRadius(), this.getTickRadius());
        Rectangle2D arcRectMajor = DialPlot.rectangleByRadius(frame,
                this.getTickRadius() - this.getMajorTickLength(), this.getTickRadius() - this.getMajorTickLength());
        Rectangle2D arcRectMinor = arcRect;
        if (this.getMinorTickCount() > 0 && this.getMinorTickLength() > 0.0) {
            arcRectMinor = DialPlot.rectangleByRadius(frame, this.getTickRadius() - this.getMinorTickLength(),
                    this.getTickRadius() - this.getMinorTickLength());
        }
        Rectangle2D arcRectForLabels = DialPlot.rectangleByRadius(frame,
                this.getTickRadius() - this.getTickLabelOffset(), this.getTickRadius() - this.getTickLabelOffset());

        boolean firstLabel = true;

        Arc2D arc = new Arc2D.Double();
        Line2D workingLine = new Line2D.Double();
        Stroke arcStroke = new BasicStroke(0.75f);

        for (double v = this.getLowerBound(); v <= this.getUpperBound(); v += this.getMajorTickIncrement()) {
            arc.setArc(arcRect, this.getStartAngle(), valueToAngle(v) - this.getStartAngle(), Arc2D.OPEN);
            g2.setPaint(this.getMajorTickPaint());
            g2.setStroke(arcStroke);
            g2.draw(arc);

            Point2D pt0 = arc.getEndPoint();
            arc.setArc(arcRectMajor, this.getStartAngle(), valueToAngle(v) - this.getStartAngle(), Arc2D.OPEN);
            Point2D pt1 = arc.getEndPoint();
            g2.setPaint(this.getMajorTickPaint());
            g2.setStroke(this.getMajorTickStroke());
            workingLine.setLine(pt0, pt1);
            g2.draw(workingLine);
            arc.setArc(arcRectForLabels, this.getStartAngle(), valueToAngle(v) - this.getStartAngle(), Arc2D.OPEN);
            Point2D pt2 = arc.getEndPoint();

            if (this.getTickLabelsVisible()) {
                if (!firstLabel || this.getFirstTickLabelVisible()) {
                    g2.setFont(this.getTickLabelFont());
                    TextUtilities.drawAlignedString(this.getTickLabelFormatter().format(v), g2, (float) pt2.getX(),
                            (float) pt2.getY(), TextAnchor.CENTER);
                }
            }
            firstLabel = false;

            // now do the minor tick marks
            if (this.getMinorTickCount() > 0 && this.getMinorTickLength() > 0.0) {
                double minorTickIncrement = this.getMajorTickIncrement() / (this.getMinorTickCount() + 1);
                for (int i = 0; i < this.getMinorTickCount(); i++) {
                    double vv = v + ((i + 1) * minorTickIncrement);
                    if (vv >= this.getUpperBound()) {
                        break;
                    }
                    double angle = valueToAngle(vv);

                    arc.setArc(arcRect, this.getStartAngle(), angle - this.getStartAngle(), Arc2D.OPEN);
                    pt0 = arc.getEndPoint();
                    arc.setArc(arcRectMinor, this.getStartAngle(), angle - this.getStartAngle(), Arc2D.OPEN);
                    Point2D pt3 = arc.getEndPoint();
                    g2.setStroke(this.getMinorTickStroke());
                    g2.setPaint(this.getMinorTickPaint());
                    workingLine.setLine(pt0, pt3);
                    g2.draw(workingLine);
                }
            }

        }
    }

}