Hi Ryan,

a bit difficult without posting the whole thing here. I'll try. We have a 
process diagram drawn in PowerPoint that contains a hyperlink for each 
process element. When we export this to SVG and load this into a browser we 
have clickable links. These links get lost when rendering the SVG in a Wiki 
page. We have the choice of linking the whole image to its "download me" 
page or no links at all. Can this be worked around? The alternative is a 
bitmap with an image map, which we could not make work either, though I'll 
try your hint.

Thanks & best regards

Am Dienstag, 13. Februar 2018 14:16:26 UTC+1 schrieb RjOllos:
> On Wednesday, January 24, 2018 at 1:32:59 PM UTC, Joerg Pleumann wrote:
>> Hi,
>> sorry is this has been discussed before, but we cannot seem to make it 
>> work: We are using Trac 1.2.2 and want to display an image with clickable 
>> hyperlink regions that point to other Trac wiki pages. SVG is preferred 
>> because of scalability, but unfortunately the links got lost when rendering 
>> the SVG. We can choose between a link to the graphic itself (default 
>> behavior) or one that is not clickable at all (map/usemap, from here 
>> <https://trac.edgewall.org/ticket/4969>). A bitmap with HTML clickable 
>> regions would also be ok. I guess we could always try to express the whole 
>> thing as inline HTML code and use static resources from "somewhere", but 
>> that does not seem so maintainable/elegant.
>> Any hints are appreciated.
>> Cheers
>> Joerg
> I haven't used image maps very often, but it seems like #4969 is 
> misleading. The Image macro use the value of the usermap argument when 
> generating the img element. I'm not sure that an attachment like 
> "photomap.txt" is supported as a value for the usermap argument. It looks 
> like usermap must refer to a usermap element in the HTML. Therefore, I 
> assume the only way is to put the usermap element inline in the HTML using 
> a WikiProcessor.
> For example, PlantUmlMacro supports image maps (1). The markup looks like 
> this:
> <map id="49d3988d0f436b1348b6e28a52057c7dda5d8b11_map" 
> name="49d3988d0f436b1348b6e28a52057c7dda5d8b11_map">
> <area shape="rect" id="id1" href="http://www.google.com"; title="
> http://www.google.com"; alt="" coords="8,3,48,117">
> </map>
> <img src="/proj-1.0/plantuml?id=49d3988d0f436b1348b6e28a52057c7dda5d8b11" 
> usemap="#49d3988d0f436b1348b6e28a52057c7dda5d8b11_map">
> It may be that I'm not entirely following your usecase. Could you provide 
> a concrete example?
> - Ryan
> (1) https://trac-hacks.org/ticket/10998

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