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c#itextitext7

iTextsharp/itext7 - Not able to pop up the annotation when hovering on the rectangle

I am working with iText7 c# library to highlight the text and add annotations when mouse hover on the highlighted text.

I would like to annotate a rectangular area/highlighted text on my PDF. i.e. I would like to hover the mouse anywhere within the given rectangle area and have the annotation pop up.

It seems that a Text annotation only appears when hovering in the upper left corner of the annotation Rectangle. I tried using the combination of Rectangle and Text Annotation but that only seems to pop up when I'm hovering over the top left corner not the interior.

Can you tell me how to have the annotation appear when I hover anywhere within the given Rectangle?

I tried with changing the Rectangle size but, no luck..

FYI, I was able to achieve the same functionality with Pdfsharp

PDFSharp Output enter image description here

iText7 Output

The Annotation pops up only when we mouse hover on the borders

enter image description here

The output PDF link is here

Thank you in advance

Solution

  • Your pdfSharpOutput.pdf has set the IC (interior color) but not the C ((border) color). Your iText7Output.pdf has not set the IC (interior color) but the C ((border) color).

    Apparently Adobe Acrobat only displays that hover text for areas for which a color has been defined. (This behavior is arbitrary, it is not in any way prescribed by the standard. Thus, it may change in any new release of Acrobat.)

    To get the same behavior with iText as with PdfSharp, you should set the interior color of the iText PdfSquareAnnotation using one of its setInteriorColor overloads.