layeredbarchartdemo1.java

Web图形化的Java库

/* ======================================
 * JFreeChart : a free Java chart library
 * ======================================
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * 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.
 *
 * -------------------------
 * LayeredBarChartDemo1.java
 * -------------------------
 * (C) Copyright 2003, by Arnaud Lelievre and Contributors.
 *
 * Original Author:  Arnaud Lelievre (for Garden);
 * Contributor(s):   -;
 *
 *
 * Changes
 * -------
 * 28-Aug-2003 : Version 1 (AL);
 *
 */

package org.jfree.chart.demo;

import java.awt.Color;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.LayeredBarRenderer;
import org.jfree.data.CategoryDataset;
import org.jfree.data.DatasetUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * A simple demonstration application showing how to create a superimposed horizontal bar chart.
 *
 * @author Arnaud Lelievre
 */
public class LayeredBarChartDemo1 extends ApplicationFrame {

    /**
     * Creates a new demo instance.
     *
     * @param title  the frame title.
     */
    public LayeredBarChartDemo1(String title) {

        super(title);

        // create a dataset...
        double[][] data = new double[][] {
            {41.0, 33.0, 22.0, 64.0, 42.0, 62.0, 22.0, 14.0},
            {55.0, 63.0, 55.0, 48.0, 54.0, 37.0, 41.0, 39.0},
            {57.0, 75.0, 43.0, 33.0, 63.0, 46.0, 57.0, 33.0}
        };

        CategoryDataset dataset = DatasetUtilities.createCategoryDataset("Series ", 
                                                                         "Factor ", 
                                                                         data);

        // create the chart...
        CategoryAxis categoryAxis = new CategoryAxis("Category");
        ValueAxis valueAxis = new NumberAxis("Score (%)");


        CategoryPlot plot = new CategoryPlot(dataset, 
                                            categoryAxis,
                                            valueAxis,
                                            new LayeredBarRenderer());
        
        plot.setOrientation(org.jfree.chart.plot.PlotOrientation.HORIZONTAL);
        JFreeChart chart = new JFreeChart("Horizontal Superimposed Bar Chart", 
                                          JFreeChart.DEFAULT_TITLE_FONT, plot, true);

        // set the background color for the chart...
        chart.setBackgroundPaint(Color.lightGray);

        LayeredBarRenderer renderer = (LayeredBarRenderer) plot.getRenderer();

        // we can set each series bar width individually or let the renderer manage a standard view.
        // the widht is set in percentage, where 1.0 is the maximum (100%).
        renderer.setSeriesBarWidth(0, 1.0);
        renderer.setSeriesBarWidth(1, 0.7);
        renderer.setSeriesBarWidth(2, 0.4);

        renderer.setItemMargin(0.01);
        CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setCategoryMargin(0.25);
        domainAxis.setUpperMargin(0.05);
        domainAxis.setLowerMargin(0.05);

        // add the chart to a panel...
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        setContentPane(chartPanel);

    }

    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        LayeredBarChartDemo1 demo = new LayeredBarChartDemo1("Layered Bar Chart Demo 1");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}