Question

我的问题：使用jfreechart，我需要在y轴上显示不均匀间隔的百分比阈值。例如，我y轴上的唯一标签应该是阈值，如下所示;所有其他纵坐标应为空白：

-
93%
85%
78%
72%
66%
-
50%
-
-
-
-
-

我目前正在使用此代码段显示百分比，但这只会创建一个均匀间隔的百分比轴：

    CategoryPlot plot = (CategoryPlot) chart.getPlot();

    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    DecimalFormat pctFormat = new DecimalFormat("#.0%");
    rangeAxis.setNumberFormatOverride(pctFormat);

任何帮助将不胜感激！

Answer 1

这是一个有点骇人听闻的答案，我会赞成任何能以一种好方式获得相同结果的答案。但它有效 - 这就是我所做的。

首先，我创建了一个我想要使用的双值列表：

public static List<Double> m_lPercentageValuesForY = Arrays.asList(0.1,0.2,0.3,0.4,0.5,0.58,0.66,0.70,0.74,0.78,0.82,0.95,1.0);

然后我覆盖NumberAxis中的refreshTicks方法，首先将所有默认刻度设置为Ticktype.MINOR，然后使用Ticktype.MAJOR添加并创建我的自定义刻度：

    NumberAxis axisLeft = new NumberAxis(plot.getRangeAxis().getLabel()) {
        @Override
        public List refreshTicks(
                Graphics2D g2, 
                AxisState state,
                Rectangle2D dataArea, 
                RectangleEdge edge) {

            List defaultTicks = super.refreshTicks(g2, state, dataArea, edge);
            List customTicks = new ArrayList();

            for (Object aTick : defaultTicks) {
                NumberTick currenttick = (NumberTick) aTick;

                customTicks.add(new NumberTick(
                        TickType.MINOR, 
                        currenttick.getValue(), 
                        "",  //empty
                        currenttick.getTextAnchor(), 
                        currenttick.getRotationAnchor(),
                        currenttick.getAngle()));
            }
            NumberTick aTick = (NumberTick) defaultTicks.get(0);
            for (double dTest : m_lPercentageValuesForY) {
                customTicks.add(new NumberTick(
                        TickType.MAJOR, 
                        dTest, 
                        String.format("%.0f%%", dTest * 100), //only wanted values are set to major
                        aTick.getTextAnchor(), 
                        aTick.getRotationAnchor(),
                        aTick.getAngle()));
            }
            return customTicks;
        }
    };
    plot.setRangeAxis(axisLeft);

y轴上的自定义百分比阈值，间距不均匀

1 个答案: