MoveLayer failing
Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=1784
Printed Date: 29 Dec 25 at 7:43PM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com
Topic: MoveLayer failing
Posted By: mountainman1957
Subject: MoveLayer failing
Date Posted: 26 Mar 11 at 11:45PM
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Hello Helpful People!
I've hit a very annoying problem with MoveLayer in certain files. Hopeful someone out there knows what it is I'm missing...
My app requires combining the layers of an existing PDF file and then adding new layers above and below the original for graphical processing. The graphics are used to mark out areas of text in the original document for processing. With many test files, no problem. The basic plan has been:
CombineLayers
NewLayer (7 times)
MoveLayer 1 to layer 3.
Now I'm finding some files that always fail at stage 3 and there seems to be no way around it. Some (all??) of these files have an Optional ContentGroup, but I've deleted that before CombineLayers.
What am I missing, please
 ?The files giving the problem are from various sources but they generally have some security and a watermark. However, I can successfully get rid of both by using ExtractPages or ExtractPageRanges.
It is only page 1 in each file that refuses to allow MoveLayer (or DeleteLayer) though it will allow CombineLayers and SplitPageText. I can insert a page before, using InsertPages, but that doesn't help.
If I use ExtractPages and omit page 1, everything works on the remaining pages. If I use ExtractPages to extract page 1 with or without other pages, page 1 still refuses to play ball.
I have searched for images, checked Objects, done a repair with PDFTK. Nothing works! I've also looked through the extracted files in Notepad but nothing stands out. Clearly I'm guessing there is something on page 1 in each of these files that is preventing manipulation of the layers, but it is not obvious what it is.
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Replies:
Posted By: Ingo
Date Posted: 27 Mar 11 at 7:59PM
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Hi! You should upload a sample to the official support pages. Cheers and welcome here, Ingo |
Posted By: Rowan
Date Posted: 27 Mar 11 at 8:06PM
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Just for everyone's benefit, there is a http://help.quickpdflibrary.com/questions/352/what-is-the-difference-between-layers-and-optional-content-groups-ocgs-in-quick - description on this page of the difference between optional content groups (OCGs) and layers in Quick PDF Library that differs from the terms used in Acrobat. In short layers in Quick PDF Library refer to content streams and optional content groups in Quick PDF Library refer to what Acrobat calls layers. As Ingo said, send your docs to the official support team and they can help you out.
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