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Question about sample data part in chart examples [message #908894]

Thu, 06 September 2012 07:31

moritz du

Messages: 102
Registered: February 2010

Senior Member

most of the chart examples looking very similar and for most parts i have at least a "feeling" what they do. But in all examples their is a part that creates sample data and adds it to the chart. it looks like that:

        SampleData sd = DataFactory.eINSTANCE.createSampleData();
        BaseSampleData sdBase = DataFactory.eINSTANCE.createBaseSampleData();
        sdBase.setDataSetRepresentation("");//$NON-NLS-1$
        sd.getBaseSampleData().add(sdBase);
        
        OrthogonalSampleData sdOrthogonal1 = DataFactory.eINSTANCE.createOrthogonalSampleData();
        sdOrthogonal1.setDataSetRepresentation("");//$NON-NLS-1$
        sdOrthogonal1.setSeriesDefinitionIndex(0);
        sd.getOrthogonalSampleData().add(sdOrthogonal1);
        
        OrthogonalSampleData sdOrthogonal2 = DataFactory.eINSTANCE.createOrthogonalSampleData();
        sdOrthogonal2.setDataSetRepresentation("");//$NON-NLS-1$
        sdOrthogonal2.setSeriesDefinitionIndex(1);
        sd.getOrthogonalSampleData().add(sdOrthogonal2);
        cwaBar.setSampleData(sd);

at first sight it is allway the same?! what does this do? (to prevent more of such questions: is there a documentation that explains how the charts are working, the model behind it and some other backgrounds? - most of documentations i found are click-through-eclipse-interface tutorials. )

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Re: Question about sample data part in chart examples [message #909209 is a reply to message #908894]

Thu, 06 September 2012 18:28

Jason Weathersby

Messages: 9167
Registered: July 2009

Senior Member

Sample data is not required. That is used in the chart builder to show data in the preview before connecting to real data. I am not sure this is covered in the chart faq, but it does contain a lot of data.
http://wiki.eclipse.org/BIRT/FAQ/Charts2.2

Jason

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