jfreechat 一些杂记

最近做个项目要用到jFreechart，所以在用的过程中的一些东西记录下来，方便自己以后查询

1.图形平移

    private void moveRightActionPerformed(java.awt.event.ActionEvent evt) {                                          

        Rectangle2D screenDataArea = chartPanel.getScreenDataArea();

        screenDataArea.setRect(screenDataArea.getX() + MOVE_LEFT_STEP, screenDataArea.getY(), screenDataArea.getWidth(), screenDataArea.getHeight());
        chartPanel.zoom(screenDataArea);
        chartPanel.repaint();
    }                                         

2.通过鼠标对legend进行操作

……

chartPanel.addChartMouseListener(new MouseListener());//添加鼠标监听响应

……


    private class MouseListener implements ChartMouseListener {

        public void chartMouseClicked(ChartMouseEvent event) {
            if (event.getTrigger().getClickCount() == 2) { //双击相应
                ChartEntity localChartEntity = event.getEntity();
                if (localChartEntity instanceof LegendItemEntity) { // 判别是否是legend
                    LegendItemEntity legendItemEntity = (LegendItemEntity) localChartEntity;                                    
                    XYPlot xyPlot = (XYPlot) chart.getPlot();
                    TimeSeriesCollection historyDataset = (TimeSeriesCollection) xyPlot.getDataset(HISTROY_LINE); // 数据集
                   
                    XYLineAndShapeRenderer historyXyLineAndShapeRenderer = (XYLineAndShapeRenderer) xyPlot.getRenderer(HISTROY_LINE); // 画线
                    // 其他操作……
            }
        }

        public void chartMouseMoved(ChartMouseEvent event) {
        }
    }

3.多坐标轴操作

    private JFreeChart createChart() {
        JFreeChart chart = ChartFactory.createTimeSeriesChart("综合曲线面板", "历史曲线时间", "历史曲线值", historyDataset, true, true, false);
        chart.getTitle().setFont(titleFont);
        XYPlot xyPlot = (XYPlot) chart.getPlot();
        DateAxis histroyDataAxis = new DateAxis("历史曲线时间");
        histroyDataAxis.setAutoRange(true);
        histroyDataAxis.setLabelFont(axisFont);
        histroyDataAxis.setTickLabelFont(axisFont);
        xyPlot.setDomainAxis(HISTROY_LINE, histroyDataAxis);

        ValueAxis historyRangeAxis = new NumberAxis("历史数据值");
        historyRangeAxis.setLabelFont(axisFont);
        historyRangeAxis.setTickLabelFont(axisFont);
        xyPlot.setRangeAxis(HISTROY_LINE,historyRangeAxis);
        XYLineAndShapeRenderer historyXyLineAndShapeRenderer = new XYLineAndShapeRenderer();
        historyXyLineAndShapeRenderer.setBaseShapesVisible(true);
        int i = 0;
        
        xyPlot.setRenderer(HISTROY_LINE, historyXyLineAndShapeRenderer);


        realTimeDataset = new TimeSeriesCollection();
        xyPlot.setDataset(REAL_TIME_LINE, realTimeDataset);
        ValueAxis realTimeValueaxis = new DateAxis("实时时间");
        realTimeValueaxis.setLabelFont(axisFont);
        //自动设置数据轴数据范围
        realTimeValueaxis.setAutoRange(true);
        //数据轴固定数据范围 30s
        realTimeValueaxis.setFixedAutoRange(30000D);

        xyPlot.setDomainAxis(REAL_TIME_LINE, realTimeValueaxis);
        ValueAxis realTimeRangeAxis = new NumberAxis("实时数据值");
        realTimeRangeAxis.setLabelFont(axisFont);
        xyPlot.setRangeAxis(REAL_TIME_LINE, realTimeRangeAxis);
        XYLineAndShapeRenderer realTimeXyLineAndShapeRenderer = new XYLineAndShapeRenderer();
        //historyXyLineAndShapeRenderer.setBaseShapesVisible(true);
        realTimeXyLineAndShapeRenderer.setUseFillPaint(true);
        realTimeXyLineAndShapeRenderer.setLegendItemToolTipGenerator(new StandardXYSeriesLabelGenerator("history {0}"));
        xyPlot.setRenderer(REAL_TIME_LINE, realTimeXyLineAndShapeRenderer);

// 数据映射
        xyPlot.setDomainAxisLocation(REAL_TIME_LINE, AxisLocation.TOP_OR_RIGHT);
        xyPlot.setRangeAxisLocation(REAL_TIME_LINE,AxisLocation.TOP_OR_RIGHT);
        xyPlot.setDomainAxisLocation(HISTROY_LINE, AxisLocation.BOTTOM_OR_LEFT);
        xyPlot.setRangeAxisLocation(HISTROY_LINE, AxisLocation.BOTTOM_OR_LEFT);
        xyPlot.mapDatasetToDomainAxis(REAL_TIME_LINE, REAL_TIME_LINE);
        xyPlot.mapDatasetToRangeAxis(REAL_TIME_LINE, REAL_TIME_LINE);
        xyPlot.mapDatasetToDomainAxis(HISTROY_LINE, HISTROY_LINE);
        xyPlot.mapDatasetToRangeAxis(HISTROY_LINE, HISTROY_LINE);
        return chart;

4.
jfreechart中，series是表示每个线，他有个自己的key，另外series还有自己在render中的一个index，两者转化靠Dataset中indexOf（）函数