Re: Manipulate elements by id or class name - Idea for a feature request

Hi Hagen,

Maybe the project I am doing might interest you.

My goal is to use SVG to create GUIs for handhelds (More details
here<http://jyro.blogspot.com/2008/09/inkface-svg-based-gui-design.html>
).

I don't have complete solution for what you are saying, but I created a
modified version of librsvg (dubbed libaltsvg) (source available
here<http://code.google.com/p/altcanvas/source/browse/trunk/libaltsvg/>).
So far I have added handful of new calls that can be used to separately get
individual components of the SVG image. These individual components are
exported as cairo surface which can be selectively drawn as per the
programming logic.

I am further interested in changing the attributes of these individual
components: for e.g. text of a text element; or color of the element; etc.

You can take a look and see if it serves your purpose.

Hope that helps!

Jayesh



On Mon, Oct 6, 2008 at 3:19 AM, Hagen Schink <[email protected]>wrote:

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>
> Hello there!
>
> I'd like to discuss the idea of a feature request I have in mind. I've
> bothered a developer (at least I guess he's one) on IRC already but he said
> that there is no real chance for this request to become accepted. I want to
> use this mail to point to some advantages I see though.
>
> The main idea is that librsvg provides an API which allows the developer to
> manipulate attributes of the SVG file on the fly. In the end this means the
> manipulation of a RsvgHandle. Here a simplified example:
>
> static void
> rsvg_set_attribute (RsvgHandle *handle, gchar *id, gchar *attribute, gchar
> *value);
>
> I think it's obvious that this is much more convenient then a lot of file
> and libxml magic. At least I hope to preserve the speed benefit librsvg
> provides.
>
> This would enable the developer to manipulate SVGs in a way that preserves
> different measures (and this is very important, at least for the designer
> and his artwork). With pure Cairo this is not possible (please correct me if
> I'm wrong).
>
> I don't know how much effort is needed to provide an API in the way I
> proposed. Neither I know if there are other concerns which speak against
> such an API. But I'd like to discuss it to understand a possible refusal.
>
> Kind regards,
>   Hagen Schink
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