[jira] [Commented] (PDFBOX-2692) Possibility to use our own and/or overwrite PageDrawer class

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-2692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14336709#comment-14336709 ] 

Tilman Hausherr commented on PDFBOX-2692:
-----------------------------------------

>From [~danielwilson] in PDFBOX-2691 (closed as duplicate):
A change from PDFBox 1.8.8 and earlier makes PageDrawer a final class -- prohibiting classes from inheriting it.

This will prevent me from upgrading to version 2.0.0 because I use PDFBox to render PDF's in .Net.  That requires that a few methods be overridden to use .Net drawing objects and libraries rather than Java objects and libraries.  In order to override those methods, I define a class thus:

{code}

namespace PDFBox_Net
{
    public class PageDrawer_Net : org.apache.pdfbox.pdfviewer.PageDrawer
    { 
 /* all kinds of cool C# code
...

*/
    }
}
{code}

If PDFBox 2.0 PageDrawer remains final, I will need to choose between staying on the 1.8.x branch and forking the code.

> Possibility to use our own and/or overwrite PageDrawer class
> ------------------------------------------------------------
>
>                 Key: PDFBOX-2692
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2692
>             Project: PDFBox
>          Issue Type: Wish
>          Components: Rendering
>    Affects Versions: 2.0.0
>         Environment: JDK 1.8, Windows 7, PDF-Box - current trunk
>            Reporter: Manfred Pock
>              Labels: features
>
> We use PDFBox to render PDF's. Additionally, we have the posibility to add different kinds of annotation (stamp, marks, free text, notes..) like in a wysiwyg-editor. To do this, it is necessary that we paint these annotations on our own.
> Another reason is not to paint all parts: for example we have a pdf with an embedded picture. Behind the picture we have the OCR-text to this picture. This text is only needed for searching und should not be painted.
> Thus it would be useful to use our own derived PageDrawer. As I see there are some things to change.
> a.) remove the final from PagerDrawer-class.
> b.) make some global-variables (graphics, xform, pageSize...) protected,
> c.) also some methods like setRenderingHints should be protected
> d.) maybe the possibility to say to the PDFRender which PageDrawer should be used.



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