Why i cant set forecolor and backcolor of element?

[goompas]

Hello

Why i cant set forecolor and backcolor of element after filling ?

                        page = (JRPrintPage) pages.get(i);
                       elements = page.getElements();

 

List modifiedElements = new ArrayList();

 if (element instanceof JRPrintText)
                                {

                                    JRPrintText modifiedElement = ((JRPrintText) element);

                                    modifiedElement.setForecolor(Color.BLUE);

                                    modifiedElements.add(modifiedElement);

}

 page.setElements(modifiedElements);

 

Why this dont work? What should i do?

[lucianc]

The JRPrintText objects that result from a report fill do not implement these methods as they are optimized to store attributes common to other elements in shared objects.  The objects should probably throw exceptions on unimplemented methods so that it's clear that this is not supported.

If you want to perform this kind of processing on filled reports, a trick that helps is to go through an XML export in order to lose the fill optimizations.  So do an JasperExportManager.exportReportToXml() and then read back the JasperPrint object from the XML export via JRPrintXmlLoader, and then process this object.  Note that this will result in an increase of heap space required by the filled report.

Regards,

Lucian

[goompas]

Thanks for answer

Is there any way to change dynamicly color of textfield element to any rgb? I know that can use styled text, but then numbers fields i must declare as string and when export to xls, excel dont see this numbers as numbers but strings.

[lucianc]

No, that's not possible.  We have this on our radar, hopefully we'll implement a solution for it in the future.

Regards,

Lucian