/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.

 *

 * Project Info:  http://www.jfree.org/jfreechart/index.html

 *

 * 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.

 *

 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

 * in the United States and other countries.]

 *

 * ------------------

 * XYDotRenderer.java

 * ------------------

 * (C) Copyright 2002-2004, by Object Refinery Limited.

 *

 * Original Author:  David Gilbert (for Object Refinery Limited);

 * Contributor(s):   Christian W. Zuckschwerdt;

;

 *

 * $Id: XYDotRenderer.java,v 1.1 2004/08/31 14:49:29 mungady Exp $

 *

 * Changes (from 29-Oct-2002)

 * --------------------------

 * 29-Oct-2002 : Added standard header (DG);

 * 25-Mar-2003 : Implemented Serializable (DG);

 * 01-May-2003 : Modified drawItem(...) method signature (DG);

 * 30-Jul-2003 : Modified entity constructor (CZ);

 * 20-Aug-2003 : Implemented Cloneable and PublicCloneable (DG);

 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);

 * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState (DG);

 * 

 */



package org.jfree.chart.renderer.xy;



import java.awt.Graphics2D;

import java.awt.geom.Rectangle2D;

import java.io.Serializable;



import org.jfree.chart.axis.ValueAxis;

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.data.xy.XYDataset;

import org.jfree.ui.RectangleEdge;

import org.jfree.util.PublicCloneable;



/**

 * A renderer that draws a small dot at each data point for an {@link XYPlot}.

 *

 */

public class XYDotRenderer extends AbstractXYItemRenderer 

                           implements XYItemRenderer, 

                                      Cloneable,

                                      PublicCloneable,

                                      Serializable {



    /**

     * Constructs a new renderer.

     */

    public XYDotRenderer() {

        super();

    }



    /**

     * Draws the visual representation of a single data item.

     *

     * @param g2  the graphics device.

     * @param state  the renderer state.

     * @param dataArea  the area within which the data is being drawn.

     * @param info  collects information about the drawing.

     * @param plot  the plot (can be used to obtain standard color information etc).

     * @param domainAxis  the domain (horizontal) axis.

     * @param rangeAxis  the range (vertical) axis.

     * @param dataset  the dataset.

     * @param series  the series index (zero-based).

     * @param item  the item index (zero-based).

     * @param crosshairState  crosshair information for the plot (<code>null</code> permitted).

     * @param pass  the pass index.

     */

    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) {



        // get the data point...

        Number xn = dataset.getX(series, item);

        Number yn = dataset.getY(series, item);

        if (yn != null) {

            double x = xn.doubleValue();

            double y = yn.doubleValue();

            RectangleEdge xAxisLocation = plot.getDomainAxisEdge();

            RectangleEdge yAxisLocation = plot.getRangeAxisEdge();

            double transX = domainAxis.valueToJava2D(x, dataArea, xAxisLocation);

            double transY = rangeAxis.valueToJava2D(y, dataArea, yAxisLocation);



            g2.setPaint(this.getItemPaint(series, item));

            PlotOrientation orientation = plot.getOrientation();

            if (orientation == PlotOrientation.HORIZONTAL) {

                g2.drawRect((int) transY, (int) transX, 1, 1);

            }

            else if (orientation == PlotOrientation.VERTICAL) {

                g2.drawRect((int) transX, (int) transY, 1, 1);

            }



            updateCrosshairValues(crosshairState, x, y, transX, transY, orientation);

        }



    }



    /**

     * 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();

    }



}

