Getting Exception: "Requires xLow < xHigh" when zooming in

[Biene_Maja]

Hi,

if i zoom endlessly in a diagramm i get an Exception:

Code: Select all

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Requires xLow < xHigh.
	at org.jfree.chart.renderer.RendererUtilities.findLiveItemsLowerBound(RendererUtilities.java:76)
	at org.jfree.chart.renderer.RendererUtilities.findLiveItems(RendererUtilities.java:261)
	at org.jfree.chart.plot.XYPlot.render(XYPlot.java:3819)
	at org.jfree.chart.plot.XYPlot.draw(XYPlot.java:3389)
	at org.jfree.chart.JFreeChart.draw(JFreeChart.java:1237)
	at org.jfree.chart.ChartPanel.paintComponent(ChartPanel.java:1677)
	at javax.swing.JComponent.paint(Unknown Source)
	at javax.swing.JComponent.paintToOffscreen(Unknown Source)
	at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
	at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
	at javax.swing.RepaintManager.paint(Unknown Source)
	at javax.swing.JComponent._paintImmediately(Unknown Source)
	at javax.swing.JComponent.paintImmediately(Unknown Source)
	at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at javax.swing.RepaintManager.seqPaintDirtyRegions(Unknown Source)
	at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

i even tried some of the examples (Annotation Demo1 for example) and i got the same. It works till there are no more numbers on the axis. If i then zoom in ~20-30 more times i get the exception. In another thread it was suggested to use setAutoRangeMinimumSize(1.0). But that doesn't seem to work.

[mkrauskopf]

Hi. I guess you should file an issue into the JFreeChart tracker. IMHO a plot (in this case XYPlot) should not allow to zoom in once the interval is actually zero if it not subsequently able to render it. XYPlot#zoom(Domain|Range)Axes sets zero Range but cannot handle it subsequently in the XYPlot#render method.

I guess it can be workarounded within your code.

[Biene_Maja]

Here is a minimal example:

Code: Select all

 public static void main(String[] args) {
	 XYSeries series = new XYSeries("series1");
	 series.add(5, 4);
	 series.add(4, 3);
	 XYSeriesCollection dataset = new XYSeriesCollection();
	 dataset.addSeries(series);
	 JFreeChart chart = ChartFactory.createXYLineChart("Chart", "X", "Y", dataset, PlotOrientation.VERTICAL, true, true, false);
	 ChartFrame frame = new ChartFrame("chart", chart);
	 frame.pack();
	 frame.setVisible(true);
	 }

just keep zooming in and you will get the Exception after the numbers dissapeared and you keep zooming in. It's not if it hangs the app or anything but the exception is thrown. I don't really know how to work around it, cause it's all "internaly" as seen by the exception stack trace and my code has nothing to do with it.

[mkrauskopf]

cause it's all "internally" as seen by the exception stack trace and my code has nothing to do with it.

Yup, you are right (I think) - that's why you should file issue against the JFreeChart tracker.

There are more ways to prevent (workaround) the exception, the easier one which comes to my mind is ensuring that axis range length is never zero. E.g. add this to your class and call the tweaked (and simplified) createXYLineChart instaed of original method in ChartFactory.

Code: Select all

public static JFreeChart createXYLineChart(String title, String xAxisLabel, String yAxisLabel,
      XYDataset dataset, PlotOrientation orientation, boolean legend, boolean tooltips, boolean urls) {
  NumberAxis xAxis = newTweakedNumberAxis(xAxisLabel);
  xAxis.setAutoRangeIncludesZero(false);
  NumberAxis yAxis = newTweakedNumberAxis(yAxisLabel);
  XYItemRenderer renderer = new XYLineAndShapeRenderer(true, false);
  XYPlot plot = new XYPlot(dataset, xAxis, yAxis, renderer);
  plot.setOrientation(orientation);
  JFreeChart chart = new JFreeChart(title, JFreeChart.DEFAULT_TITLE_FONT, plot, legend);
  return chart;
}

private static NumberAxis newTweakedNumberAxis(String label) {
  return new NumberAxis(label) {
    @Override
    public void setRange(Range sRange) {
      super.setRange(sRange.getLength() == 0
              ? new Range(sRange.getLowerBound(), sRange.getLowerBound() + 1e-10)
              : sRange);
    }
  };
}

You will want to probably use more sophisticated math based on actual getLowerBound() value.

Cheers,
-- m.

[Biene_Maja]

Thx for your answers will use what you suggested.

Seems the "bug" is already in the tracker
http://sourceforge.net/tracker/index.ph ... tid=115494

[TzlaD]

Hey there,

I have also been bugged with this issue and my observations lead to the opinion that when zooming in the double values due to their precision issues will have values that will be xLow > xHigh.
I tried to zoom on the sides of the plot which should lead to 0.0 on the low end and Infinity on the other (See overflow of double values). If you then try to zoom infinitely nothing happens since the overflow values will always be smaller or equal respectively bigger or equal to the overflow value of double. But if you then try to zoom again, now not starting/ending at the plots (lower/left)/(right/upper) edge you will enconter the same exception... since new values seem to be calculated.

This brings me to the conclusion that the precision of the doulbe value is what causes this unwanted behaviour. Maybe that helps a bit when trying to find a solution!?


I can't see any clean solution so far, but would highly appreciate any more hints.

Cheers TzlaD