>
>
> The shape of the clickable area is a bit of an issue. I think there is a 
> way round that in that SVG is usable much like "image maps" used to be.
> Here is an example in TW: 
> http://sunypoly-cushinj-project.tiddlyspot.com/#Choose%20a%20County
>

problem with svg links is the shadow DOM, haven't figured how to have TW 
apply linkd inside svg's without manually inserting the link into the svg 
code-- not so much an issue with the typical icon for link.

TW system svg icons (used for buttons) use a button for applying any link 
and the button is a html element which has the square bounding box so the 
blank (padding) area between the actual graphic and its button edges, no an 
issue since the icon usually fills most of the button. -- But with diamonds 
which have considerable blank space in the corners, it becomes obvious.

But the last demo actually used rotated div's and buttons which give true 
diamond shaped clickable areas-- much eadier and just as good-- color, 
border hover changes and animations can be done to them just like with a 
svg.

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