JFreeChart - 颜色与2传说的问题 [英] JFreeChart - Problem of colors with 2 legends

问题描述

我尝试在我的图表中创建自定义图例，但是当我显示一个或两个图例时，会发生奇怪的情况。当我显示2个传说（旧的和新的），一切都是好的，颜色尊重传说和图中。但是，当我只想显示新的图例时，图例中的颜色将被尊重，但图表中的颜色不再受到尊重。

I try to create a customized legend in my chart but something strange happens when I display one or two legends. When I display 2 legends (the old one and the new one), everything is allright, colors are respected in legends and in the graph. But, when I want to display only the new legend, the colors in the legend are respected but the colors in the graph are not respected anymore.

这是一个例子我的问题：
您必须评论和分解一行才能看到问题（见注释）

This is an example on my issue: You have to comment and decomment a line to see the problem (see comments)

package org.jfree.chart.demo;

import java.awt.Color;
import java.awt.geom.Ellipse2D;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;

import javax.swing.JPanel;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.LegendItemSource;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CombinedDomainXYPlot;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.LegendTitle;
import org.jfree.data.time.FixedMillisecond;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.time.TimeSeriesDataItem;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RefineryUtilities;

public class Sample extends ApplicationFrame {

/**
 * 
 */
private static final long serialVersionUID = 1L;

private static ArrayList<Date> A;
private static ArrayList<Date> B;
private static ArrayList<Date> C;
private static Calendar t0;

public Sample(String paramString) {
    super(paramString);
    t0 = Calendar.getInstance();
    t0.set(2010, Calendar.JANUARY, 1);
    A = new ArrayList<Date>();
    B = new ArrayList<Date>();
    C = new ArrayList<Date>();
    JPanel localJPanel = createDemoPanel();
    setContentPane(localJPanel);

}

private static XYPlot createSubplot1(XYDataset paramXYDataset) {

    // With Dots
    XYLineAndShapeRenderer localXYLineAndShapeRenderer = new XYLineAndShapeRenderer();
    localXYLineAndShapeRenderer.setBaseLinesVisible(false);
    localXYLineAndShapeRenderer.setUseFillPaint(false);
    localXYLineAndShapeRenderer.setBaseFillPaint(Color.white);
    localXYLineAndShapeRenderer.setBaseShape(new Ellipse2D.Double(-4.0D,
            -4.0D, 8.0D, 8.0D));
    localXYLineAndShapeRenderer.setAutoPopulateSeriesShape(false);

    NumberAxis localNumberAxis = new NumberAxis("TEST");
    localNumberAxis.setVisible(false);
    localNumberAxis.setRange(0.5, 1.5);

    XYPlot localXYPlot = new XYPlot(paramXYDataset, new DateAxis("Time"),
            localNumberAxis, localXYLineAndShapeRenderer);

    return localXYPlot;

}

private static JFreeChart createChart() {
    CombinedDomainXYPlot localCombinedDomainXYPlot = new CombinedDomainXYPlot(
            new DateAxis("Time"));

    localCombinedDomainXYPlot.add(createSubplot1(createDataset1()), 1);

    JFreeChart localJFreeChart = new JFreeChart("Sample",
            localCombinedDomainXYPlot);
    localJFreeChart.getLegend().setPosition(RectangleEdge.TOP);
    localJFreeChart.getLegend().getItemContainer().getBlocks();

    localJFreeChart.setBackgroundPaint(Color.white);

    LegendItemCollection legendItemsOld = localCombinedDomainXYPlot
            .getLegendItems();
    final LegendItemCollection legendItemsNew = new LegendItemCollection();

    for (int i = 0; i < legendItemsOld.getItemCount(); i++) {
        legendItemsNew.add(legendItemsOld.get(i));
    }
    LegendItemSource source = new LegendItemSource() {
        LegendItemCollection lic = new LegendItemCollection();
        {
            lic.addAll(legendItemsNew);
        }

        public LegendItemCollection getLegendItems() {
            return lic;
        }
    };
    localJFreeChart.addLegend(new LegendTitle(source));

    ChartUtilities.applyCurrentTheme(localJFreeChart);

    ////////////////////////////////////////////////////////////////////////
    /**
     * If you comment the following line, two legends are displayed and the
     * colors in the graph are respected (yellow, red, blue, red, green)
     * However, when you decomment the line, only the new legend is
     * displayed. The legend is correct but the colors in the graph are not
     * respected anymore (red, yellow, green, yellow, blue)
     */
    /////////////////////////////////////////////////////////////////////////
    // localJFreeChart.getLegend().setVisible(false);



    return localJFreeChart;
}

public static JPanel createDemoPanel() {
    return new ChartPanel(createChart());
}

private static XYDataset createDataset1() {
    final Calendar out1 = Calendar.getInstance();
    out1.set(2009, Calendar.JANUARY, 1);

    final Calendar out2 = Calendar.getInstance();
    out2.set(2010, Calendar.JANUARY, 3);

    final Calendar end = Calendar.getInstance();
    end.set(2012, Calendar.SEPTEMBER, 30);

    Date date1 = date(t0, 0);
    TimeSeries s1 = new TimeSeries("RED");

    int i = 0;

    TimeSeries s4 = new TimeSeries("YELLOW");
    TimeSeries s2 = new TimeSeries("BLUE");
    TimeSeries s3 = new TimeSeries("GREEN");

    RegularTimePeriod rtpt0 = new FixedMillisecond(t0.getTime());
    TimeSeriesDataItem t = new TimeSeriesDataItem(rtpt0, 1);
    s4.add(t);
    i++;
    int interval = 57;
    date1 = date(t0, 0 + interval * i);
    Calendar d1;

    while (date1.before(date(end, 0))) {

        while (date1.before(date(end, 0)) && i < 8) {
            RegularTimePeriod rtp = new FixedMillisecond(date1.getTime());
            A.add(date1);
            t = new TimeSeriesDataItem(rtp, 1);
            s1.add(t);

            d1 = Calendar.getInstance();
            d1.setTimeInMillis(date1.getTime());
            date1 = date(d1, 0 + interval);
            i++;

        }

        if (date1.before(date(end, 0))) {
            RegularTimePeriod rtp = new FixedMillisecond(date1.getTime());
            B.add(date1);
            t = new TimeSeriesDataItem(rtp, 1);
            s2.add(t);
            d1 = Calendar.getInstance();
            d1.setTimeInMillis(date1.getTime());
            date1 = date(d1, 0 + interval);
        }
        d1 = Calendar.getInstance();
        d1.setTimeInMillis(date1.getTime());
        date1 = date(d1, 14);
        i = 1;
        while (date1.before(date(end, 0)) && i < 8) {
            RegularTimePeriod rtp = new FixedMillisecond(date1.getTime());
            A.add(date1);
            t = new TimeSeriesDataItem(rtp, 1);
            s1.add(t);
            d1 = Calendar.getInstance();
            d1.setTimeInMillis(date1.getTime());
            date1 = date(d1, 0 + interval);
            i++;

        }
        i = 0;
        if (date1.before(date(end, 0))) {
            RegularTimePeriod rtp = new FixedMillisecond(date1.getTime());
            C.add(date1);
            t = new TimeSeriesDataItem(rtp, 1);
            s3.add(t);
            d1 = Calendar.getInstance();
            d1.setTimeInMillis(date1.getTime());
            date1 = date(d1, 0 + interval);
        }
        d1 = Calendar.getInstance();
        d1.setTimeInMillis(date1.getTime());
        date1 = date(d1, 61);

    }

    TimeSeriesCollection dataset = new TimeSeriesCollection();

    dataset.addSeries(s1);
    dataset.addSeries(s2);
    dataset.addSeries(s3);
    dataset.addSeries(s4);
    return dataset;
}

/**
 * Utility method for creating <code>Date</code> objects.
 * 
 * @param day
 *            the date.
 * @param month
 *            the month.
 * @param year
 *            the year.
 * 
 * @return a date.
 */
private static Date date(Calendar calendar, int daysPlus) {
    final Calendar calendarResult = (Calendar) calendar.clone();
    calendarResult.add(Calendar.DAY_OF_MONTH, daysPlus);
    final Date result = calendarResult.getTime();

    return result;

}

public static void main(String[] paramArrayOfString) {
    Sample localXYTaskDatasetDemo2 = new Sample("Sample");
    localXYTaskDatasetDemo2.pack();
    RefineryUtilities.centerFrameOnScreen(localXYTaskDatasetDemo2);
    localXYTaskDatasetDemo2.setVisible(true);
}

}

感谢您的帮助。

推荐答案

这是您致电 ChartUtilities.applyCurrentTheme 覆盖了颜色。

It was your call to ChartUtilities.applyCurrentTheme that overwrote the colors.

另一件事：当您需要删除标准版本时，应该使用 chart.removeLegend（）方法。

Another thing: You should use the chart.removeLegend() method when you need to remove the standard one. See the following code for the solution.

private static JFreeChart createChart() {
   CombinedDomainXYPlot localCombinedDomainXYPlot = new CombinedDomainXYPlot(new DateAxis("Time"));

   JFreeChart localJFreeChart = new JFreeChart("Sample", localCombinedDomainXYPlot);
   localCombinedDomainXYPlot.add(createSubplot1(createDataset1()), 1);
   ChartUtilities.applyCurrentTheme(localJFreeChart);
   localJFreeChart.setBackgroundPaint(Color.white);

   final LegendItemCollection legendItemsOld = localCombinedDomainXYPlot.getLegendItems();
   LegendItemSource source = new LegendItemSource() {
      public LegendItemCollection getLegendItems() {
         LegendItemCollection lic = new LegendItemCollection();
         int itemCount = legendItemsOld.getItemCount();
         for (int i = 0; i < itemCount; i++) {
            lic.add(legendItemsOld.get(i));
         }
         return lic;
      }
   };
   localJFreeChart.removeLegend();
   localJFreeChart.addLegend(new LegendTitle(source));
   localJFreeChart.getLegend().setPosition(RectangleEdge.TOP);
   localJFreeChart.getLegend().getItemContainer().getBlocks();

   return localJFreeChart;
}

这篇关于JFreeChart - 颜色与2传说的问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！