JFreechart循环通过极地图表部门
我有以下代码方法循环通过极坐标图的扇区，但该方法被调用多次，就像它在循环中一样。 我想在图的每个扇区上创建一个系列，该扇区由轴刻度单位和角度刻度单位定义。 当我注释掉polarDataset.addSeries(new XYSeries("test"))和这个新系列的for循环时，问题就消失了，让我相信可能会有这个问题。 这是之前发布的问题的延续
有人可以向我解释为什么它会循环播放？ 为什么创建的系列数量不等于图表上的扇区数量？
int intSeries = 0; public void createSeriesOnSectors() { for (int r = 0; r <= plot.getMaxRadius(); r += ((NumberAxis) plot .getAxis()).getTickUnit().getSize()) { for (int i = 0; i <= 360; i += plot.getAngleTickUnit() .getSize()) { dataset.addSeries(new XYSeries("test")); intSeries++; for (int e = i; e < i+ plot.getAngleTickUnit().getSize(); e++) { dataset.getSeries(polarDataset.getSeriesCount() - 1).add(90 - e, r- ((NumberAxis) plot.getAxis()).getTickUnit().getSize()); } } }System.out.println("The number of sec is : " + intSeries); }
所以，我编辑了trachGod的例子来实现ChartProgressListener 。 我还使XYSeriesCollection成为一个全局变量，并在chartprogess方法中添加了以下代码：
for (int i = 0; i < 6; i++) { XYSeries seriesy = new XYSeries(i + "π/8 " + "< θ < 2π+" + i + "π/8"); for (int t = 0; t <= 1 * 360; t++) { seriesy.add(90 - t - i * 45, t); } result.addSeries(seriesy); }
但仍然增加了比要求更多的系列。 任何帮助总是非常感谢。
完整的代码：
import java.awt.Color; import java.awt.Dimension; import java.util.ArrayList; import java.util.List; import javax.swing.JFrame; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.NumberTick; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.event.ChartProgressEvent; import org.jfree.chart.event.ChartProgressListener; import org.jfree.chart.plot.PolarPlot; import org.jfree.chart.renderer.DefaultPolarItemRenderer; import org.jfree.chart.renderer.PolarItemRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.ui.TextAnchor; public class tests extends JFrame implements ChartProgressListener { private static final String title = "Archimedes' Spiral"; public static XYSeriesCollection result; public tests(String title) { super(title); JFreeChart chart = createChart(createDataset()); ChartPanel panel = new ChartPanel(chart); panel.setPreferredSize(new Dimension(500, 500)); panel.setMouseZoomable(false); this.add(panel); } private static XYDataset createDataset() { result = new XYSeriesCollection(); XYSeries series = new XYSeries(title); XYSeries series2 = new XYSeries(title); for(int i = 90; i<180; i++){ series2.add(90-i, 200); series2.add(90-i, 0); } result.addSeries(series); result.addSeries(series2); return result; } private JFreeChart createChart(XYDataset dataset) { ValueAxis radiusAxis = new NumberAxis(); radiusAxis.setTickLabelsVisible(false); PolarItemRenderer renderer = new DefaultPolarItemRenderer(); PolarPlot plot = new PolarPlot(dataset, radiusAxis, renderer) { @Override protected List refreshAngleTicks() { List ticks = new ArrayList(); int delta = (int) this.getAngleTickUnit().getSize(); for (int t = 0; t < 360; t += delta) { int tp = (360 + 90 - t) % 360; NumberTick tick = new NumberTick( Double.valueOf(t), String.valueOf(tp), TextAnchor.CENTER, TextAnchor.CENTER, 0.0); ticks.add(tick); } return ticks; } }; plot.setBackgroundPaint(new Color(0x00f0f0f0)); plot.setRadiusGridlinePaint(Color.gray); plot.addCornerTextItem("r(θ) = θ; 0 < θ < 6π"); DefaultPolarItemRenderer renderers = new DefaultPolarItemRenderer(); for (int i = 0; i < dataset.getSeriesCount(); i++) { renderers.setSeriesFilled(i, true); } plot.setRenderer(renderers); JFreeChart chart = new JFreeChart( title, JFreeChart.DEFAULT_TITLE_FONT, plot, true); chart.setBackgroundPaint(Color.white); chart.addProgressListener(this); return chart; } public static void main(String[] args) { tests demo = new tests(title); demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); demo.pack(); demo.setLocationRelativeTo(null); demo.setVisible(true); } @Override public void chartProgress(ChartProgressEvent e) { if (e.getType() == ChartProgressEvent.DRAWING_FINISHED) { JFreeChart chart = e.getChart(); draw(); } } public void draw(){ for (int i = 0; i < 6; i++) { XYSeries seriesy = new XYSeries(i + "π/8 " + "< θ < 2π+" + i + "π/8"); for (int t = 0; t <= 1 * 360; t++) { seriesy.add(90 - t - i * 45, t); } result.addSeries(seriesy); } } }
看起来你在每次迭代时都添加了所有六个螺旋线。 这是我对你的sscce的变化。
import java.awt.Color; import java.awt.Dimension; import java.util.ArrayList; import java.util.List; import javax.swing.JFrame; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.NumberTick; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.event.ChartProgressEvent; import org.jfree.chart.event.ChartProgressListener; import org.jfree.chart.plot.PolarPlot; import org.jfree.chart.renderer.DefaultPolarItemRenderer; import org.jfree.chart.renderer.PolarItemRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.ui.TextAnchor; public class tests extends JFrame implements ChartProgressListener { private static final String title = "Archimedes' Spirals"; private XYSeriesCollection result = new XYSeriesCollection(); private DefaultPolarItemRenderer renderers = new DefaultPolarItemRenderer(); private int i; public tests(String title) { super(title); JFreeChart chart = createChart(result); ChartPanel panel = new ChartPanel(chart); panel.setPreferredSize(new Dimension(500, 500)); panel.setMouseZoomable(false); this.add(panel); } private JFreeChart createChart(XYDataset dataset) { ValueAxis radiusAxis = new NumberAxis(); radiusAxis.setTickLabelsVisible(false); PolarItemRenderer renderer = new DefaultPolarItemRenderer(); PolarPlot plot = new PolarPlot(dataset, radiusAxis, renderer) { @Override protected List refreshAngleTicks() { List ticks = new ArrayList (); int delta = (int) this.getAngleTickUnit().getSize(); for (int t = 0; t < 360; t += delta) { int tp = (360 + 90 - t) % 360; NumberTick tick = new NumberTick( Double.valueOf(t), String.valueOf(tp), TextAnchor.CENTER, TextAnchor.CENTER, 0.0); ticks.add(tick); } return ticks; } }; plot.setBackgroundPaint(new Color(0x00f0f0f0)); plot.setRadiusGridlinePaint(Color.gray); plot.addCornerTextItem("r(θ) = θ; 0 < θ < 2π; +iπ/8"); setFilled(dataset); plot.setRenderer(renderers); JFreeChart chart = new JFreeChart( title, JFreeChart.DEFAULT_TITLE_FONT, plot, true); chart.setBackgroundPaint(Color.white); chart.addProgressListener(this); return chart; } public static void main(String[] args) { tests demo = new tests(title); demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); demo.pack(); demo.setLocationRelativeTo(null); demo.setVisible(true); } @Override public void chartProgress(ChartProgressEvent e) { if (e.getType() == ChartProgressEvent.DRAWING_FINISHED) { System.out.println(e); JFreeChart chart = e.getChart(); draw(); } } public void draw() { if (i < 8) { XYSeries series = new XYSeries(i + "π/8 " + "< θ < 2π+" + i + "π/8"); for (int t = 0; t <= 1 * 360; t++) { series.add(90 - t - i * 45, t); } result.addSeries(series); setFilled(result); i++; } } private void setFilled(XYDataset dataset) { for (int i = 0; i < dataset.getSeriesCount(); i++) { renderers.setSeriesFilled(i, true); } } }