These classes uses pdf-renderer, obtainable from
https://pdf-renderer.dev.java.net/.
pdf-renderer is an "an open source, all Java library which renders PDF documents
to the screen using Java2D." This attribute can be put into a
Vergil diagram and its visual appearance will be be defined
by a PDF file. Using these classes requires that
PDFRenderer.jar be in the classpath. Usually, PDFRenderer.jar
may be found in $PTII/ptolemy/vergil/pdfrenderer
.
@since Ptolemy II 8.1