Q: How do I set the individual annotation object properties using the
pdftron.SDF.Obj object?
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A: To access Cos/SDF annotation dictionary use annot.GetSDFObj(). For
example of how to use SDF API you may want to take a look at SDFTest
sample project (http://www.pdftron.com/net/samplecode.html#SDF).
As an example the following code snippet creates a watermark PDF
annotation (not to be confused with stamping PDF content to existing
PDF pages ):
static Annot CreateWatermarkAnnotation(PDFDoc doc) {
Annot annot = Annot.Create(doc.GetSDFDoc(), Annot.Type.e_Watermark,
new Rect(0, 0, 300, 200));
Obj annot_dict = annot.GetSDFObj();
// Optional, create FixedPrint dictionary in the annot
dictionary...
Obj fixed_print = annot_dict.Put("FixedPrint");
fixed_print.PutName("Type", "FixedPrint");
// Create Matrix entry: 1 0 0 1 72 -72]
// that translates one inch right and one inch down
Obj fixed_print_mtx = fixed_print.PutArray("Matrix");
fixed_print_mtx.PushBackNumber(1);
fixed_print_mtx.PushBackNumber(0);
fixed_print_mtx.PushBackNumber(0);
fixed_print_mtx.PushBackNumber(1);
fixed_print_mtx.PushBackNumber(72);
fixed_print_mtx.PushBackNumber(-72);
// The amount to translate the associated content vertically,
// as a percentage of the height of the target media (or if
// unknown, the height of the page's MediaBox). 1.0 represents
// 100% and 0.0 represents 0%.
fixed_print.PutNumber("V"); // Translate the full height of the
page vertically
// Create annotation appearance.
annot.SetAppearance(CreateWatermarkAppearance(doc));
return annot;
}