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Meter Chart - Set regions at runtime from Series data [message #987838]

Wed, 28 November 2012 10:58

Brett Strydom

Messages: 3
Registered: November 2012
Location: Cape Town

Junior Member

Hi All,

I am new to Birt and I am having a lot of fun Smile

I am just stuck on one thing though. I have created a meter chart and managed to get it working perfectly but I have had to hard code the regions for the data sets I want to display.

So what I am trying to do now is I want to set the regions based on the datasource data so that in the event the that the data changes, it will still work according to the logic in the script basd from the dataset.

Is this possible? I am using this script to set the regions:

function beforeGeneration( chart, icsc ) {

importPackage(Packages.org.eclipse.birt.chart.model.component.impl);
importPackage(Packages.org.eclipse.birt.chart.model.attribute.impl);
importPackage(Packages.org.eclipse.birt.chart.model.attribute);
importPackage(Packages.org.eclipse.birt.chart.model.data.impl);

var firstAxis = chart.getSeriesDefinitions().get(0).getSeriesDefinitions().get(0).getRunTimeSeries().get(0).getDial();

var seriesdata = series.getDataSet().getValues();

var firstRange = DialRegionImpl.create();
firstRange.setFill(ColorDefinitionImpl.RED());
firstRange.setStartValue( NumberDataElementImpl.create( 0 ) );
firstRange.setEndValue( NumberDataElementImpl.create( 2 ) );
firstAxis.getDialRegions().add(firstRange);

var secondRange = DialRegionImpl.create();
secondRange.setFill(ColorDefinitionImpl.YELLOW());
secondRange.setStartValue( NumberDataElementImpl.create( 2 ) );
secondRange.setEndValue( NumberDataElementImpl.create( 5 ) );
firstAxis.getDialRegions().add(secondRange);

var thirdRange = DialRegionImpl.create();
thirdRange.setFill(ColorDefinitionImpl.GREEN());
thirdRange.setStartValue( NumberDataElementImpl.create( 5 ) );
thirdRange.setEndValue( NumberDataElementImpl.create( 12 ) );
firstAxis.getDialRegions().add(thirdRange);

}

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Re: Meter Chart - Set regions at runtime from Series data [message #988262 is a reply to message #987838]

Thu, 29 November 2012 08:09

Brett Strydom

Messages: 3
Registered: November 2012
Location: Cape Town

Junior Member

Hi,

i would really appreciate some help on this one Smile

Thanks
Brett

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Re: Meter Chart - Set regions at runtime from Series data [message #988442 is a reply to message #988262]

Thu, 29 November 2012 22:00

Jason Weathersby

Messages: 9167
Registered: July 2009

Senior Member

Brett

Are you wanting the start and end numbers to come from a dataset? If so just add a table that contains the values above the chart and using the visibility property hide the table. In the table detail row's oncreate script put in something like:
var var1 = this.getRowData().getColumnValue("yourcolumnnamethathasstartnumber");
reportContext.setPersistentGlobalVariable("mystart", var1);

Then in the chart script enter something like:

var start = icsc.getExternalContext().getScriptable().getPersistentGlobalVariable("mystart");
firstRange.setStartValue( NumberDataElementImpl.create( start ) );

Do the same for end of the region as well.

Jason

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