/*==========================================================================*\
| $Id: HistogramChart.java,v 1.1 2010/05/11 14:51:40 aallowat Exp $
|*-------------------------------------------------------------------------*|
| Copyright (C) 2006-2008 Virginia Tech
|
| This file is part of Web-CAT.
|
| Web-CAT is free software; you can redistribute it and/or modify
| it under the terms of the GNU Affero General Public License as published
| by the Free Software Foundation; either version 3 of the License, or
| (at your option) any later version.
|
| Web-CAT 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 Affero General Public License
| along with Web-CAT; if not, see <http://www.gnu.org/licenses/>.
\*==========================================================================*/
package org.webcat.grader.graphs;
import java.awt.BasicStroke;
import java.awt.Color;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYBarRenderer;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.xy.IntervalXYDataset;
import com.webobjects.appserver.WOContext;
//-------------------------------------------------------------------------
/**
* A histogram component, implemented using JFreeChart.
*
* @author Stephen Edwards
* @version $Id: HistogramChart.java,v 1.1 2010/05/11 14:51:40 aallowat Exp $
*/
public class HistogramChart extends JFreeChartComponent
{
//~ Constructors ..........................................................
// ----------------------------------------------------------
/**
* Default constructor.
* @param context The page's context
*/
public HistogramChart(WOContext context)
{
super( context );
}
//~ KVC Attributes (must be public) .......................................
public Number markValue;
//~ Methods ...............................................................
// ----------------------------------------------------------
protected int minimumHeight()
{
return 150;
}
// ----------------------------------------------------------
protected JFreeChart generateChart(WCChartTheme chartTheme)
{
JFreeChart chart = ChartFactory.createHistogram(
null, xAxisLabel(), yAxisLabel(), intervalXYDataset(),
orientation(), false, false, false);
XYPlot plot = chart.getXYPlot();
XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer();
renderer.setAutoPopulateSeriesOutlinePaint(true);
renderer.setDrawBarOutline(true);
renderer.setShadowVisible(false);
if (markValue != null)
{
plot.setDomainCrosshairVisible(true);
plot.setDomainCrosshairValue(markValue.doubleValue());
plot.setDomainCrosshairPaint(Color.red);
plot.setDomainCrosshairStroke(MARKER_STROKE);
}
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
return chart;
}
// ----------------------------------------------------------
public IntervalXYDataset intervalXYDataset()
{
return (IntervalXYDataset) dataset();
}
//~ Instance/static variables .............................................
private static final BasicStroke MARKER_STROKE = new BasicStroke(1.5f);
}