Dynamically change Meter chart scale and regions according column value

amrutaraut99@gmail.com

<p>Hi Team,</p>
<p> </p>
<p>I am creating meter chart using BIRT ,i want to change the meter regions  value according fetched column value and also change scale according fetch column value+30%of that same column value ,this is actually meter structure and needle will show the another column value in  the above mentioned meter.How to dynamically change regions and scale?</p>
<p> </p>
<p>Can anyone please suggest me any idea on the same ?</p>
<p> </p>
<p>thanks in Advance.</p>
<p> </p>
<p>Regards</p>
<p>Amruta.</p>

Clement Wong

<p>You'll need to fetch the column value first before applying it in the meter, and you can do this via the following methods:</p>
<ol><li>API</li>
<li>A hidden table and setting a (PGV) variable so that the meter can access it</li>
<li>In the Data Set's onFetch event and setting a (PGV) variable so that the meter can access it</li>
</ol><p> </p>
<p>To change the scale, you can look at this DevShare example:</p>
<p><a data-ipb='nomediaparse' href='http://developer.actuate.com/community/forum/index.php?/files/file/664-change-meter-scale-with-script/'>http://developer.actuate.com/community/forum/index.php?/files/file/664-change-meter-scale-with-script/</a></p&gt;
<p> </p>
<p> </p>
<p>In the example below, we change the end value of the first region to 30,000:</p>
<pre class="_prettyXprint _lang-">
function beforeGeneration( chart, icsc )
{

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

var seriesDef = chart.getSeriesDefinitions().get(0);
var seriesIterator = seriesDef.getSeriesDefinitions().get(0).getRunTimeSeries().listIterator();
while(seriesIterator.hasNext()){
var meter = seriesIterator.next();
var meterDial = meter.getDial();


// Get a handle to the first region and set the end value to 30,000
var dialRegions = meterDial.getDialRegions();
var dialRegion1 = dialRegions.get(0);
dialRegion1.setEndValue(NumberDataElementImpl.create(30000));


var meterScale = meterDial.getScale();
meterScale.setStep(3);
meterScale.setMin(NumberDataElementImpl.create(0));
meterScale.setMax(NumberDataElementImpl.create(80000));
}
}
</pre>