[jfreechart-dev] [ jfreechart-Bugs-1666784 ] alternating lines for XYSeries

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Bugs item #1666784, was opened at 2007-02-22 22:05
Message generated for change (Comment added) made by brutzman
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Category: General
Group: None
Status: Closed
Resolution: None
Priority: 5
Private: No
Submitted By: Don Brutzman (brutzman)
Assigned to: David Gilbert (mungady)
Summary: alternating lines for XYSeries

Initial Comment:
Lines connecting points in an XYSeries are zigzagging up and down instead of going from one point to the next.

Code excerpts follow, nothing outlandish or unusual is intended.  The same results occur using jfreechart 1.0.3 and 1.0.4.

=============================

    /** JFreeChart datasetXy collecting X and Y series data */
    private XYSeriesCollection datasetXy = new XYSeriesCollection ();




    /** jfreeChart XYSeries for x,y values in a geographic plot */
    private XYSeries seriesXY = new XYSeries ("Geographic plot");




//loop:
     seriesXY.add (x, y);


   private JFreeChart createChart (XYDataset dataset, String title)
    {
        if (dataset instanceof TimeSeriesCollection)
        {
            chart = ChartFactory.createTimeSeriesChart (
                    title,              // title
                    "time",             // x-axis label
                    "meters",           // y-axis label
                    dataset,            // data
                    true,               // create legend?
                    true,               // generate tooltips?
                    false               // generate URLs?
                    );
        }
        else if (dataset instanceof XYSeriesCollection)
        {
            chart = ChartFactory.createXYLineChart (
                    title,              // title
                    "meters",           // x-axis label
                    "meters",           // y-axis label
                    dataset,            // data
                    PlotOrientation.VERTICAL,
                    true,               // create legend?
                    true,               // generate tooltips?
                    false               // generate URLs?
                    );
        }
        // customize chart appearance
        chart.setBackgroundPaint (Color.white);
        
        XYPlot plot = (XYPlot) chart.getPlot ();
        plot.setBackgroundPaint (Color.white);
        plot.setDomainGridlinePaint (Color.lightGray);
        plot.setRangeGridlinePaint (Color.lightGray);
        plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
        plot.setDomainCrosshairVisible (true);
        plot.setRangeCrosshairVisible (true);
        
        XYItemRenderer r = plot.getRenderer ();
        if (r instanceof XYLineAndShapeRenderer)
        {
            XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) r;
            renderer.setBaseShapesVisible (true);
            renderer.setBaseShapesFilled (true);
            renderer.setDrawSeriesLineAsPath (true);  // TODO debug zigzag linedraw on X Y geo plot
        }
        
        Axis axis = (Axis) plot.getDomainAxis ();
        if (axis instanceof DateAxis)
        {
            if (isPlotRelativeTimeOnDomainAxis ()) // TODO:  also include hours if total interval > 60 minutes
            {
                DateAxis timeAxis = (DateAxis) plot.getDomainAxis ();
                timeAxis.setDateFormatOverride (new SimpleDateFormat ("mm:ss"));
            }
            else
            {
                DateAxis timeAxis = (DateAxis) plot.getDomainAxis ();
                timeAxis.setDateFormatOverride (new SimpleDateFormat ("HH:mm:ss"));
            }
        }
        // getDomainAxis() might also yield CategoryAxis, NumberAxis, PeriodAxis
        
        NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis ();
        rangeAxis.setAutoRange (true);
        
        return chart;
    }



----------------------------------------------------------------------

>Comment By: Don Brutzman (brutzman)
Date: 2007-03-31 22:35

Message:
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Originator: YES

this correction worked well - thank you

----------------------------------------------------------------------

Comment By: David Gilbert (mungady)
Date: 2007-03-05 05:17

Message:
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I tend to agree with Sergei, although it is hard to tell from the
information you've provided.  I'll close this, but please feel free to
reopen it if you can provide a runnable test case that we can debug.

Regards,

Dave Gilbert
JFreeChart Project Leader

----------------------------------------------------------------------

Comment By: Sergei Ivanov (sergei_ivanov)
Date: 2007-02-27 01:38

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I think it is not a bug.
You are using the XYSeries(Comparable) constructor, which defaults
'autoSort' property to 'true'. You need to use the alternative
constructor:

private XYSeries seriesXY = new XYSeries ("Geographic plot", false);

The 'autoSort' property is read-only and can only be specified at the time
of initialisation.

Hope that helps.

----------------------------------------------------------------------

Comment By: Don Brutzman (brutzman)
Date: 2007-02-22 22:06

Message:
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Originator: YES

File Added: XYPlotAlternationProblemZoom.png

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