com.newatlanta.bluedragon.CustomXYStepRenderer.java Source code

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Here is the source code for com.newatlanta.bluedragon.CustomXYStepRenderer.java

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/* 
 *  Copyright (C) 2000 - 2008 TagServlet Ltd
 *
 *  This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
 *  
 *  OpenBD is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  Free Software Foundation,version 3.
 *  
 *  OpenBD 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 OpenBD.  If not, see http://www.gnu.org/licenses/
 *  
 *  Additional permission under GNU GPL version 3 section 7
 *  
 *  If you modify this Program, or any covered work, by linking or combining 
 *  it with any of the JARS listed in the README.txt (or a modified version of 
 *  (that library), containing parts covered by the terms of that JAR, the 
 *  licensors of this Program grant you additional permission to convey the 
 *  resulting work. 
 *  README.txt @ http://www.openbluedragon.org/license/README.txt
 *  
 *  http://www.openbluedragon.org/
 */

package com.newatlanta.bluedragon;

import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;

import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.XYToolTipGenerator;
import org.jfree.chart.plot.CrosshairState;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRendererState;
import org.jfree.chart.renderer.xy.XYStepRenderer;
import org.jfree.chart.urls.XYURLGenerator;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.PublicCloneable;

/**
 * Line/Step item renderer for an {@link XYPlot}. This class draws lines
 * between data points, only allowing horizontal or vertical lines (steps).
 * 
 * @author Roger Studner
 */
public class CustomXYStepRenderer extends XYStepRenderer implements Cloneable, PublicCloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -8918141928884796108L;

    /**
     * Constructs a new renderer with no tooltip or URL generation.
     */
    public CustomXYStepRenderer() {
        super();
    }

    /**
     * Constructs a new renderer.
     * 
     * @param toolTipGenerator
     *          the item label generator.
     * @param urlGenerator
     *          the URL generator.
     */
    public CustomXYStepRenderer(XYToolTipGenerator toolTipGenerator, XYURLGenerator urlGenerator) {
        super(toolTipGenerator, urlGenerator);
    }

    public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info,
            XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item,
            CrosshairState crosshairState, int pass) {
        super.drawItem(g2, state, dataArea, info, plot, domainAxis, rangeAxis, dataset, series, item,
                crosshairState, pass);

        // draw the item label if there is one...
        if (isItemLabelVisible(series, item)) {
            // get the data point...
            double x1 = dataset.getXValue(series, item);
            double y1 = dataset.getYValue(series, item);
            if (Double.isNaN(y1)) {
                return;
            }

            RectangleEdge xAxisLocation = plot.getDomainAxisEdge();
            RectangleEdge yAxisLocation = plot.getRangeAxisEdge();
            double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation);
            double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation);

            double xx = transX1;
            double yy = transY1;
            PlotOrientation orientation = plot.getOrientation();
            if (orientation == PlotOrientation.HORIZONTAL) {
                xx = transY1;
                yy = transX1;
            }
            drawItemLabel(g2, orientation, dataset, series, item, xx, yy, (y1 < 0.0));
        }
    }

    /**
     * Returns a clone of the renderer.
     * 
     * @return A clone.
     * 
     * @throws CloneNotSupportedException
     *           if the renderer cannot be cloned.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

}