Error when creating combined and overlaid charts

[Diego Garber]

Hello, my name is Diego, I've been working with jfreechart for a while now and I am happy with it so far. But, since my chart have been getting more and more complicated I am having a problem now creating a combined and overlaid chart.
I copied the code from the createCombinedAndOverlaidChart1() method of the sample code and discovered that when you add a TimeSeriesCollection with more than one series to the CombinedDataset, then you get this error when you try to draw the chart:


Exception occurred during event dispatching:

java.lang.ClassCastException: com.jrefinery.data.DefaultXYDataset

at com.jrefinery.data.SubSeriesDataset.getHighValue(SubSeriesDataset.java:104)

at com.jrefinery.data.CombinedDataset.getHighValue(CombinedDataset.java:221)

at com.jrefinery.data.SubSeriesDataset.getHighValue(SubSeriesDataset.java:104)

at com.jrefinery.chart.HighLowRenderer.drawItem(HighLowRenderer.java:114)

at com.jrefinery.chart.XYPlot.render(XYPlot.java:787)

at com.jrefinery.chart.OverlaidXYPlot.render(OverlaidXYPlot.java:181)

at com.jrefinery.chart.XYPlot.draw(XYPlot.java:739)

at com.jrefinery.chart.CombinedXYPlot.draw(CombinedXYPlot.java:380)

at com.jrefinery.chart.JFreeChart.draw(JFreeChart.java:618)

at com.jrefinery.chart.ChartPanel.paintComponent(ChartPanel.java:800)

at javax.swing.JComponent.paint(JComponent.java:687)

at javax.swing.JComponent.paintChildren(JComponent.java:498)

at javax.swing.JComponent.paint(JComponent.java:696)

at javax.swing.JLayeredPane.paint(JLayeredPane.java:546)

at javax.swing.JComponent.paintChildren(JComponent.java:498)

at javax.swing.JComponent.paint(JComponent.java:669)

at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:23)

at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:54)

at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:91)

at java.awt.Container.paint(Container.java:960)

at sun.awt.RepaintArea.paint(RepaintArea.java:298)

at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:196)

at java.awt.Component.dispatchEventImpl(Component.java:2663)

at java.awt.Container.dispatchEventImpl(Container.java:1213)

at java.awt.Window.dispatchEventImpl(Window.java:914)

at java.awt.Component.dispatchEvent(Component.java:2497)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:339)

at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:131)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:98)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:85)
----------------------

if you want to test this go to the createCombinedAndOverlaidChart1() method in the JFreeChartDemoBase and replace this line:

XYDataset timeSeriesData = DemoDatasetFactory.createTimeSeriesCollection2(); //10th line more & less

with:

XYDataset timeSeriesData = DemoDatasetFactory.createTimeSeriesCollection3();

which returns a TimeSeriesCollection with two series in it.


Is this a bug?, do you know any cool way to work this arround?, I thought about creating a TimeSeriesCollection for each series but then the code gets pretty messy. What do you think?

[David Gilbert]

Hi Diego,

In the original combined and overlaid chart implementation, it was necessary to use CombinedDataset, but that shouldn't be the case now, because each plot now controls its own dataset. Take a look at the CombinedXYPlotDemo.java file for an example.

Regards,

Dave Gilbert

[Diego Garber]

Dave, thanks for your answer but the CombinedXYPlotDemo class wasn't very helpful because each subplot uses a Dataset that contains only one series in it.
My problem is that I need to create a subPlot with a TimeSeriesCollection that contains more than one BasicTimeSeries. This raises the same error than the one generated by the createCombinedAndOverlaidChart1 method with the change I specified before.
Regards,

Diego.

[David Gilbert]

Hi Diego,

Sounds like a bug then. I tried it out in the CVS version of JFreeChart, it works OK there, so it looks like the bug has been cleaned up along the way.

Regards,

Dave Gilbert

[Diego Garber]

I am currently working with 0.9.4 version of jfreechart, is the CVS version newer than that?.
Another one, how can I turn off one of the references at the foot of the Graph (I mean the ones with the colored square and the plot title next to it) when I am using Combined charts.
Thank you very much Dave!, my regards,

Diego.