我尝试在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一些奇怪的事情.当我显示2个图例(旧的和新的图例)时,一切都很好,图例和图中的颜色都得到尊重.但是,当我只想显示新的图例时,将使用图例中的颜色,但不再使用图形中的颜色.
这是我的问题的一个示例：
您必须注释和分解一行以查看问题(请参阅注释)
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);
}
}
谢谢你的帮助.
解决方法:
是您对ChartUtilities.applyCurrentTheme的调用覆盖了颜色.
另一件事：当您需要删除标准方法时,应使用chart.removeLegend()方法.有关解决方案,请参见以下代码.
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;
}