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Topic: How to test if annots are visible on screen?
Conf: (P-PDF) Developers, Msg: 134288
From: pcatch
Date: 6/10/2005 10:08 AM

I'm still trying to develop a relatively simple C++ Acrobat6 plug-in with, amongst other things, a short-cut key driven function to display the next annotation not currently visible on screen. I thought the PDAnnotIsCurrentlyVisible function would help;

if (PDAnnotIsCurrentlyVisible (annot, PDDocGetOCContext(pdoc))) {
AVAlertNote("Annot Visible");
}

but apparently not - they all seem to be "visible" even if offscreen and even when hidden.

Should I be using another "context" and if so how would I get it?

Another approach might be to get the rectangle associated with each annotation and compare its co-oridinates with those of the visible screen area. I can get the annotation positions OK, but not the visible screen area - any suggestions on how to do this?

Does anyone have any other suggestions for solving this problem? The up/down arrow buttons in the Comments List pane come very close to what I'm after, but I can't figure out a way of accessing them programatically to get to work with a short-cut, which unfortunately is a must.

Any suggestions would be greatly appreciated
Peter


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