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

Introduction

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

Source

/*
 * 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.FontMetrics;
import java.awt.Graphics2D;
import java.awt.geom.Arc2D;
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.DialValueIndicator;
import org.jfree.text.TextUtilities;
import org.jfree.ui.RectangleAnchor;
import org.jfree.ui.Size2D;

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

    private int scale;

    /**
     * Creates a new instance of <code>DialValueIndicator</code>.
     */
    public ScaledDialValueIndicator() {
        this(0, 1);
    }

    /**
     * Creates a new instance of <code>DialValueIndicator</code>.
     *
     * @param datasetIndex  the dataset index.
     */
    public ScaledDialValueIndicator(int datasetIndex) {
        this(datasetIndex, 1);
    }

    /**
     * Creates a new instance of <code>DialValueIndicator</code>.
     *
     * @param datasetIndex  the dataset index.
     * @param scale  the scale.
     */
    public ScaledDialValueIndicator(int datasetIndex, int scale) {
        super(datasetIndex);
        setScale(scale);
    }

    /**
     * Draws the background to the specified graphics device.  If the dial
     * frame specifies a window, the clipping region will already have been
     * set to this window before this method is called.
     *
     * @param g2  the graphics device (<code>null</code> not permitted).
     * @param plot  the plot (ignored here).
     * @param frame  the dial frame (ignored here).
     * @param view  the view rectangle (<code>null</code> not permitted).
     */
    public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

        // work out the anchor point
        Rectangle2D f = DialPlot.rectangleByRadius(frame, getRadius(), this.getRadius());
        Arc2D arc = new Arc2D.Double(f, this.getAngle(), 0.0, Arc2D.OPEN);
        Point2D pt = arc.getStartPoint();

        // calculate the bounds of the template value
        FontMetrics fm = g2.getFontMetrics(this.getFont());
        String s = this.getNumberFormat().format(this.getTemplateValue());
        Rectangle2D tb = TextUtilities.getTextBounds(s, g2, fm);

        // align this rectangle to the frameAnchor
        Rectangle2D bounds = RectangleAnchor.createRectangle(new Size2D(tb.getWidth(), tb.getHeight()), pt.getX(),
                pt.getY(), this.getFrameAnchor());

        // add the insets
        Rectangle2D fb = this.getInsets().createOutsetRectangle(bounds);

        // draw the background
        g2.setPaint(this.getBackgroundPaint());
        g2.fill(fb);

        // draw the border
        g2.setStroke(this.getOutlineStroke());
        g2.setPaint(this.getOutlinePaint());
        g2.draw(fb);

        // now find the text anchor point
        String valueStr = this.getNumberFormat()
                .format(ChartThemesUtilities.getScaledValue(plot.getValue(this.getDatasetIndex()), scale));
        Point2D pt2 = RectangleAnchor.coordinates(bounds, this.getValueAnchor());
        g2.setPaint(this.getPaint());
        g2.setFont(this.getFont());
        TextUtilities.drawAlignedString(valueStr, g2, (float) pt2.getX(), (float) pt2.getY(), this.getTextAnchor());

    }

    /**
     * @return the scale
     */
    public int getScale() {
        return this.scale;
    }

    /**
     * @param scale the scale to set
     */
    public void setScale(int scale) {
        this.scale = scale;
    }

    /**
     * Tests this instance for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null</code> permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof ScaledDialValueIndicator)) {
            return false;
        }
        ScaledDialValueIndicator that = (ScaledDialValueIndicator) obj;
        if (this.scale != that.scale) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * Returns a hash code for this instance.
     *
     * @return The hash code.
     */
    public int hashCode() {
        return 37 * super.hashCode() + scale;
    }

    /**
     * Returns a clone of this instance.
     *
     * @return The clone.
     *
     * @throws CloneNotSupportedException if some attribute of this instance
     *     cannot be cloned.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }
}