JFreechart循环通过极地图表部门 [英] JFreechart Loop through polar chart sectors

问题描述

我有以下代码方法循环通过极坐标图的扇区，但该方法被多次调用，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（新的XYSeries（test））和这个新系列的for循环时，问题就消失了，让我相信可能有什么东西这个。这是之前发布的问题的延续。

I have the following code to method loop throug the sectors of a polar plot, but the method is being called several times, as if it was in a loop. I want to create a series on each sectors of the plot, the sector being defines by the axis tick unit and the angle tick unit. When I comment out the polarDataset.addSeries(new XYSeries("test")) and the for loop for this new series, the problem disappears, making me believe there might be something up with this. This is a continuation of a question posted earlier

有人可以请向我解释为什么它会循环播放？为什么创建的系列数不等于图表上的扇区数？

Can someone please explain to me why it keeps looping? And why the number of series created is not equivalent to the number of sectors on the chart?

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：

So, I edited trachGod's example to get implement the ChartProgressListener. I also made XYSeriesCollection a global variable and added the following code in the chartprogess method:

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);
    }

但仍然添加了比所需更多的系列。任何帮助总是非常感谢。

But more series than required are still added. Any help is always much appreciated.

完整代码：

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<NumberTick> ticks = new ArrayList<NumberTick>();
                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);
        }
    }
}

推荐答案

看起来你在每次迭代上添加了所有六个螺旋。以下是我对 sscce 的修改。

It looks like you were adding all six spirals on each iteration. Here's my variation on your sscce.

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<NumberTick> ticks = new ArrayList<NumberTick>();
                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);
        }
    }
}

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