Dear Fabio,
what you can do with the Widget Pro Gantt chart (coming from FusionCharts) is to render the chart in HTML as it uses Flash. On the other hand, exporting to pdf and other formats will not work as they don't support the Flash technology.
Could you please check if you can use the following element in your summary band: It should show you how you what you can get from this chart.
<componentElement>
<reportElement x="152" y="79" width="250" height="150" uuid="tbd"/>
<fw:ganttChart xmlns:fw="http://jaspersoft.com/fusion" xsi:schemaLocation="http://jaspersoft.com/fusion http://jaspersoft.com/schema/fusion.xsd">
<fw:categorySet>
<fw:category>
<fw:startExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd").parse("2009-07-27")]]></fw:startExpression>
<fw:endExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd").parse("2009-08-27")]]></fw:endExpression>
<fw:labelExpression><![CDATA["Sample Category"]]></fw:labelExpression>
</fw:category>
</fw:categorySet>
<fw:tasks>
<fw:task>
<fw:idExpression><![CDATA["Task1"]]></fw:idExpression>
<fw:process>
<fw:idExpression><![CDATA["Task1-Process1"]]></fw:idExpression>
<fw:labelExpression><![CDATA["Sample Process"]]></fw:labelExpression>
</fw:process>
<fw:startExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd").parse("2009-07-27")]]></fw:startExpression>
<fw:endExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd").parse("2009-08-27")]]></fw:endExpression>
<fw:labelExpression><![CDATA["Sample Task"]]></fw:labelExpression>
</fw:task>
</fw:tasks>
</fw:ganttChart>
</componentElement>
Unfortunately, I cannot provide any documentation on the Jaspersoft wizard and in the Studio there is none.
I would be grateful if anyone could share some insights on this!
Regards
Georg