Dear All,
I am struggling with a very special requirement and would appreciate any
pointers to a solution. My task requires me to:
1. Generate a PDF document with several images [original images are big, so
I scale them to fit a particular layout on the page]
2. Generated PDF file is viewed in a PDF viewer, which is embedded into my
application. This PDF viewer supports interactive features and allows
programmatic handling of Link Annotations. When a user clicks on an image, I
have to open the original image in a new window.
1. So, when I generate my PDF, I do the following:
...
Image img = Image.getInstance(img_byte_array);
img.scaleToFit(dimensionX, dimensionY);
String REFERENCE_ID = F(img)
img.setAnnotation(new Annotation(0, 0, 0, 0, "img://" + REFERENCE_ID));
...
The REFERENCE_ID here should be anything that would help me identify the img
when I parse the PDF in step 2,
so I am looking for any help on creating the F() function
2. In my event handler which is attached to the embedded PDF viewer, I do
the following:
public void handleAnnotactionClick(Annotation annotation)
{
...
String url = annotation.getURI();
if (url.startsWith("img://"))
{
String REFERENCE_ID = url.substring(6);
// Here I need to scan the PDF and find the original image stream,
// and somehow identify it by the reference key
// 1. I tried scanning using the PdfReader and I am able to find the
PdfStreams with the right subtype,
// but once I have the stream I can't figure out any way to
identify the one I need among several
// 2. I tried using JPedal, but I face the same issue of not being
able to tell one image from another.
// JPedal is using something it calls an ImageName, but that
seems to be assigned by JPedal
}
}
Thank you very much in advance for any help!
Tony.
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