Hi,
Unfortunately, there is no support in DocBook XSL for callouts using mediaobjectco. I
guess no one could figure out how to do it in XSL-FO.
Bob Stayton
Sagehill Enterprises
----- Original Message -----
From: "Chris Ridd" <>
To: <>
Sent: Tuesday, April 12, 2011 8:28 AM
Subject: [docbook-apps] Do callouts on images work?
> I've got a bunch of screenshots containing hand-drawn arrows and annotations that I
> think would be better done as callouts, but I don't seem to be able to get callouts
> rendering properly to PDF.
>
> Do they actually work?
>
> If they do, does anyone have a working example they could share? Here's my
> non-working XML:
>
> <mediaobjectco>
> <imageobjectco>
> <areaspec units="calspair">
> <area coords="5000,5000 5100,5100" id="p1" linkends="c1"/>
> </areaspec>
>
> <imageobject>
> <imagedata fileref="/path/to/screenshot.png" scale="50"/>
> </imageobject>
>
> <calloutlist>
> <callout arearefs="p1">
> <para>Here I am in the middle.</para>
> </callout>
> </calloutlist>
> </imageobjectco>
> </mediaobjectco>
>
> [I'm not sure what purpose the linkends="c1" serves, if any.]
>
> With the default docbook.xsl stylesheet and XEP this renders as a completely plain
> screenshot without any overlaid numbers. The callout underneath is rendered OK as a
> white 1 in a black circle.
>
> Chris
>
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