Re: [docbook-apps] Do callouts on images work?

["Bob Stayton" <bobs@sagehill.net>]

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
bobs@sagehill.net


----- Original Message ----- 
From: "Chris Ridd" <chrisridd@mac.com>
To: <docbook-apps@lists.oasis-open.org>
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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