CODEWITHSUNDEEP
javajfreechart
Mrusful
Mrusful

Reputation: 1503

JFreeChart setDataset for XYPlot

in my diploma i have some time expensive calculation in SwingWorker class. When SwingWorker call done method. All result should put on chart. About result - I do not know how many values in legend will be. I did it all but chart not refreshed. Not show series at all. I try through dataset.addSeries(someSeries) and chart.getXYPlot().setDataset(someDataset). In examples project like DynamicDataDemo1.java and etc. they just add new point to series and not refresh/repaint graphics. Why graphics not refreshed? I have information what add method of XYSeries send SeriesChangeEvent to all registered listeners and automatically refresh chart. But i don't know how many XYSeries will be. Can not understand how i can refresh chart through setDataset method of XYPlot. 

public class OutputChart extends JPanel {

private JFreeChart chart;
private XYSeriesCollection dataset;
private ChartPanel chartPanel;

public OutputChart() {
    dataset = createDataset();  
    chart = createChart(dataset);   
    chartPanel = new ChartPanel(chart);   
    chartPanel.setPreferredSize(new java.awt.Dimension(800, 400));   
    add(chartPanel);
}

/**  
 * Creates a chart.  
 *   
 * @param dataset  the data for the chart.  
 *   
 * @return a chart.  
 */   
private static JFreeChart createChart(XYDataset dataset) {   

    JFreeChart chart = ChartFactory.createXYLineChart(   
        "Результаты вычислений алгоритма",// chart title   
        "N",                      // x axis label   
        "V",                      // y axis label   
        dataset,                  // data   
        PlotOrientation.VERTICAL,   
        true,                     // include legend   
        true,                     // tooltips   
        false                     // urls   
    );   

    chart.setBackgroundPaint(Color.white);   

    XYPlot plot = chart.getXYPlot();   
    plot.setBackgroundPaint(Color.lightGray);   
    plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));   
    plot.setDomainGridlinePaint(Color.white);   
    plot.setRangeGridlinePaint(Color.white);   

    plot.setDomainCrosshairVisible(true);   
    plot.setRangeCrosshairVisible(true);   

    XYLineAndShapeRenderer renderer    
        = (XYLineAndShapeRenderer) plot.getRenderer();   
    renderer.setShapesVisible(true);   
    renderer.setShapesFilled(true);   

    // change the auto tick unit selection to integer units only...   
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();   
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());   

    return chart;   

}

/**
 * Create  data set for chart
 * @return empty data set
 */
private XYSeriesCollection createDataset(){
    return new XYSeriesCollection();
}

    public void setDataset(XYSeries series){ //try through addSeries and setDataset of XYPlot.
         dataset.addSeries(series);
    }

    public void setDataset(XYDataset dataset){ //try through addSeries and setDataset of XYPlot.
         chart.getXYPlot().setDataset(dataset);
    }

}

Upvotes: 1

Views: 6054

Answers (1)

trashgod
trashgod

Reputation: 205785

This example shows adding (or removing) a series to (or from) a DefaultXYDataset; no special effort is required.

An instance of XYSeriesCollection, a related XYDataset, should work similarly, as long as the application correctly uses the event dispatch thread. As suggested in this example and the SwingWorker API, either process() or done() should meet that obligation.

By default, XYPlot registers itself as a DatasetChangeListener. Verify that this has not been disabled.

An sscce may shed some light on the problem.

Upvotes: 1

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