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Image subclassing problem

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freshlyshowered

Post subject: Image subclassing problem

Posted: Mon Feb 10, 2014 7:11 am

Joined: Mon Feb 10, 2014 6:57 am
Posts: 2

Hello,

in my application I have subclassed the MigraDoc Image class. If I add an instance of the class to a section everything works fine. However, if I add it to a paragraph, the image does not display. This can be seen using the following class

Code:

class ImageSub: Image{
   public ImageSub(string path) : base(path) {}
}

The MDDDL files generated by using the above subclass and by using the Image class are identical, so this seems like a bug in the rendering code. Is there any way to work around this limitation? I am using the GDI+ version of MigraDoc.

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Thomas Hoevel

Post subject: Re: Image subclassing problem

Posted: Tue Feb 11, 2014 1:42 pm

PDFsharp Guru

Joined: Mon Oct 16, 2006 8:16 am
Posts: 3136
Location: Cologne, Germany

Hi!

What's the purpose of your subclass?

The MDDDL files are identical - so when the MDDDL is read, the normal Image class will be used and not your subclass.

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Regards
Thomas Hoevel
PDFsharp Team

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freshlyshowered

Post subject: Re: Image subclassing problem

Posted: Wed Feb 12, 2014 7:17 am

Joined: Mon Feb 10, 2014 6:57 am
Posts: 2

I'm using a stack based approach to build PDFs from HTML, so I added interfaces and some helper methods to the subclasses to reduce the amount of type testing I have to do in my code. I did manage to work around this by using an extension method, but the behavior of not displaying the image only when it's inside a paragraph is still odd.

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