Question

This example演示了如何通过在每个数据集中添加空系列来避免双轴上的多个条重叠。通过以下示例，我创建了四个DefaultIntervalCategoryDataset对象，每个对象都在各自独立的轴上（完整代码如下）。

在每个数据集中添加空系列的优点在下图中可见，例如系列2与系列1保持分开。

但是，系列3仍然与系列4重叠，这就是系列3隐藏的原因（系列4）。我找不到原因并得到解决方案。

如何避免这种过度重复，还有其他替代技术以更有效和方便的方式演示多类别问题（在我的问题中有间隔）？

public class IntervalBarChartTest extends ApplicationFrame {
    public IntervalBarChartTest(String title) {
        super(title);
        JPanel chartPanel = createDemoPanel();
        chartPanel.setPreferredSize(new Dimension(900, 270));
        setContentPane(chartPanel);
    }
    private static DefaultIntervalCategoryDataset createDataset1() {

        Number[] series1_Start = new Number[] {25,50};
        Number[] series1_End = new Number[] {50,75};
        Number[] dymmy1_Start = new Number[] {null,null};
        Number[] dummy1_End = new Number[] {null,null};
        Number[][] starts = new Number[][]{series1_Start,dymmy1_Start};
        Number[][] ends = new Number[][] {series1_End,dummy1_End};
        String[]  categoryKeys = {"50th%ile", "90th%ile"};
        String[] seriesKeys = {"Series1",""};
        DefaultIntervalCategoryDataset dataset= new DefaultIntervalCategoryDataset(seriesKeys,categoryKeys,starts, ends);
        return dataset;
    }
    private static DefaultIntervalCategoryDataset createDataset2() {
        Number[] dymmy1_Start = new Number[] {null,null};
        Number[] dummy1_End = new Number[] {null,null};
        Number[] series2_Start = new Number[] {150,150};
        Number[] series2_End = new Number[] {200,200};
        Number[] dymmy3_Start = new Number[] {null,null};
        Number[] dummy3_End = new Number[] {null,null};
        Number[][] starts = new Number[][]{dymmy1_Start,series2_Start,dymmy3_Start};
        Number[][] ends = new Number[][] {dummy1_End,series2_End, dummy3_End};
        String[]  categoryKeys = {"50th%ile", "90th%ile"};
        String[] seriesKeys = {"","Series2",""};
        DefaultIntervalCategoryDataset dataset= new DefaultIntervalCategoryDataset(starts, ends);
        dataset.setSeriesKeys(seriesKeys);
        dataset.setCategoryKeys(categoryKeys);

        return dataset;
    }
    private static DefaultIntervalCategoryDataset createDataset3() {
        Number[] dymmy1_Start = new Number[] {null,null};
        Number[] dummy1_End = new Number[] {null,null};
        Number[] series2_Start = new Number[] {150,150};
        Number[] series2_End = new Number[] {200,200};
        Number[] dymmy2_Start = new Number[] {null,null};
        Number[] dummy2_End = new Number[] {null,null};

        Number[][] starts = new Number[][]{dymmy1_Start,series2_Start,dymmy2_Start};
        Number[][] ends = new Number[][] {dummy1_End,series2_End,dummy2_End};
        String[]  categoryKeys = {"50th%ile", "90th%ile"};
        String[] seriesKeys = {"","Series3",""};
        DefaultIntervalCategoryDataset dataset= new DefaultIntervalCategoryDataset(starts, ends);
        dataset.setSeriesKeys(seriesKeys);
        dataset.setCategoryKeys(categoryKeys);

        return dataset;
    }
    private static DefaultIntervalCategoryDataset createDataset4() {
        Number[] dymmy1_Start = new Number[] {null,null};
        Number[] dummy1_End = new Number[] {null,null};
        Number[] series2_Start = new Number[] {50,50};
        Number[] series2_End = new Number[] {100,100};
        Number[][] starts = new Number[][]{dymmy1_Start,series2_Start};
        Number[][] ends = new Number[][] {dummy1_End,series2_End, };
        String[]  categoryKeys = {"50th%ile", "90th%ile"};
        String[] seriesKeys = {"","Series4"};
        DefaultIntervalCategoryDataset dataset= new DefaultIntervalCategoryDataset(starts, ends);
        dataset.setSeriesKeys(seriesKeys);
        dataset.setCategoryKeys(categoryKeys);

        return dataset;
    }
    private static JFreeChart createChart(CategoryDataset dataset1, CategoryDataset dataset2, CategoryDataset dataset3,CategoryDataset dataset4) {

        CategoryAxis domainAxis = new CategoryAxis("Percentiles");

        NumberAxis rangeAxis = new NumberAxis("ms1");
        IntervalBarRenderer renderer = new IntervalBarRenderer();
        rendererSettings(renderer);
        //CategoryPlot plot = new CategoryPlot(dataset1, domainAxis, rangeAxis,renderer);
final CategoryPlot plot = new CategoryPlot(dataset1, domainAxis, rangeAxis, renderer) {

            /**
             * Override the getLegendItems() method to handle special case.
             *
             * @return the legend items.
             */
            public LegendItemCollection getLegendItems() {

                final LegendItemCollection result = new LegendItemCollection();

                final CategoryDataset data = getDataset();
                if (data != null) {
                    final CategoryItemRenderer r = getRenderer();
                    if (r != null) {
                        final LegendItem item = r.getLegendItem(0, 0);
                        result.add(item);
                    }
                }

                // the JDK 1.2.2 compiler complained about the name of this
                // variable 
                final CategoryDataset dset2 = getDataset(1);
                if (dset2 != null) {
                    final CategoryItemRenderer renderer2 = getRenderer(1);
                    if (renderer2 != null) {
                        final LegendItem item = renderer2.getLegendItem(1, 1);
                        result.add(item);
                    }
                }
                final CategoryDataset dset3 = getDataset(2);
                if (dset3 != null) {
                    final CategoryItemRenderer renderer2 = getRenderer(2);
                    if (renderer2 != null) {
                        final LegendItem item = renderer2.getLegendItem(2, 1);
                        result.add(item);
                    }
                }
                final CategoryDataset dset4 = getDataset(3);
                if (dset4 != null) {
                    final CategoryItemRenderer renderer2 = getRenderer(3);
                    if (renderer2 != null) {
                        final LegendItem item = renderer2.getLegendItem(3, 1);
                        result.add(item);
                    }
                }
                return result;
            }

        };

        ///////////

        JFreeChart chart = new JFreeChart("Percentiles", plot);

    //  final CategoryPlot plot2 = chart.getCategoryPlot();      
    //  CategoryAxis axis = plot2.getDomainAxis();      
    //  final CategoryDataset dataset2 = createDataset2();
        plot.setDataset(1, dataset2);
        plot.mapDatasetToRangeAxis(1, 1);      
        final ValueAxis axis2 = new NumberAxis("ms2");
        plot.setRangeAxis(1, axis2);
        IntervalBarRenderer renderer2 = new IntervalBarRenderer();
        rendererSettings(renderer2);
        plot.setRenderer(1, renderer2);

        plot.setDataset(2, dataset3);
        plot.mapDatasetToRangeAxis(2, 2);      
        final ValueAxis axis3 = new NumberAxis("ms3");
        plot.setRangeAxis(2, axis3);
        IntervalBarRenderer renderer3 = new IntervalBarRenderer();
        rendererSettings(renderer3);
        plot.setRenderer(2, renderer3);

        plot.setDataset(3, dataset4);
        plot.mapDatasetToRangeAxis(3, 3);      
        final ValueAxis axis4 = new NumberAxis("ms4");
        plot.setRangeAxis(3, axis4);
        IntervalBarRenderer renderer4 = new IntervalBarRenderer();
        rendererSettings(renderer4);
        plot.setRenderer(3, renderer4);



        ChartUtilities.applyCurrentTheme(chart);
        return chart;

    }
    private static void rendererSettings(IntervalBarRenderer renderer){
    //  renderer.setItemLabelFont(new Font("Verdana",Font.PLAIN,2));
    //  renderer.setBaseItemLabelGenerator(new IntervalCategoryItemLabelGenerator());
    //  renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.INSIDE6, TextAnchor.BOTTOM_CENTER));
    //  renderer.setItemMargin(0.3);
        renderer.setBaseItemLabelsVisible(true);    

    }
    public static JPanel createDemoPanel() {
        JFreeChart chart = createChart(createDataset1(),createDataset2(),createDataset3(),createDataset4());
        return new ChartPanel(chart);
    }

    public static void main(String[] args) {
        JFrame demo = new IntervalBarChartTest(
                "Testing");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }

}

多个IntervalBarRenderer的重叠

0 个答案: