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List: qgis-developer
Subject: Re: [Qgis-developer] custom charts?
From: Raymond Nijssen <r.nijssen () terglobo ! nl>
Date: 2016-06-24 12:45:42
Message-ID: 576D2B76.2020409 () terglobo ! nl
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Hugo,
That would be way cooler!
For now, I just write generated svg files to a temp directory and add
links to them to every feature.
Strings might get long though. Here is for example the code from my
dummy image (1.4kb):
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
version="1.1"
width="32"
height="32"
id="svg2985">
<defs
id="defs2987" />
<metadata
id="metadata2990">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
<dc:title></dc:title>
</cc:Work>
</rdf:RDF>
</metadata>
<g
id="layer1">
<rect
width="32"
height="32"
ry="5.1795878"
x="0"
y="0"
id="rect2993"
style="fill:#efefef;fill-opacity:1;stroke:none" />
<path
d="m 3.2204932,9.8354288 c 0,0 2.1492989,4.3642312
5.9021879,4.1948682 2.6857939,-0.121208 2.4849709,-3.285023
5.3970119,-3.017097 3.079402,0.283325 2.518907,6.965981
6.783374,7.088215 4.047473,0.116014 6.797316,8.50238 6.797316,8.50238"
id="path3763"
style="fill:none;stroke:#a32800;stroke-width:1.60000002;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
/>
</g>
</svg>
On 24-06-16 14:34, Hugo Mercier wrote:
> It would be also cool to be able to directly use a string as image
> content for a marker (rather than just for the filename).
> That should be quite easy to do.
>
> On 24/06/2016 14:28, Nathan Woodrow wrote:
> > Raymond,
> >
> > Code generated SVGs is a pretty cool idea. Would be super keen to see
> > that once you have something!
> >
> > On Fri, Jun 24, 2016 at 10:25 PM, Neumann, Andreas <a.neumann@carto.net
> > <mailto:a.neumann@carto.net>> wrote:
> >
> > Pretty cool - so we can deliver script-generated SVG code instead of
> > a filename? Nice!
> >
> > Care to do a blog post with some example? This sounds quite exciting
> > to me.
> >
> > Andreas
> >
> > On 2016-06-24 14:12, Raymond Nijssen wrote:
> >
> > > Hi Hugo,
> > >
> > > It works! Thanks a lot!!
> > >
> > > This is exactly what i was looking for, but somehow could not find.
> > >
> > > Here is a little example with some fake svg's:
> > >
> > > http://terglobo.nl/downloads/example.png
> > >
> > > Now I will script generating svg based on real data.
> > >
> > > Regards,
> > > Raymond
> > >
> > >
> > > On 23-06-16 09:02, Hugo Mercier wrote:
> > > > On 22/06/2016 19:06, Richard Duivenvoorde wrote:
> > > > > On 22-06-16 14:39, Hugo Mercier wrote:
> > > > > > Hi Raymond,
> > > > > > > - Add a text field to my feature layer containig svg, and
> > > > > > > somehow make
> > > > > > > qgis display that on my map;
> > > > > >
> > > > > > This should work, no ?
> > > > >
> > > > > Are you sure? This would mean that the value(!) of an attribute
> > > > > would
> > > > > contain the actual svg (code, not filename).
> > > > > Any example on how to use that with styling then?
> > > >
> > > > Hmmm exact, I don't think you can include the content (I tried to
> > > > include a data url but it does not work).
> > > >
> > > > >
> > > > > > > - Add a text field to my feature layer containig a path to a
> > > > > > > png (or
> > > > > > > svg), and somehow make qgis display that on my map.
> > > > > >
> > > > > > An SVG marker with the file name defined as an expression ?
> > > > >
> > > > > Same here, while we managed to get for example colors dynamic,
> > > > > we could
> > > > > not find a way (yet) to set the marker-svg once filename is
> > > > > retrieved
> > > > > from an attribute...
> > > > >
> > > > > Happy to get an example or pointers :-)
> > > >
> > > > with an SVG-marker the filename can be "data-defined", so you can for
> > > > instance use an expression like '/xxx/mymarker_' || id || '.svg'
> > > >
> > > >
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--
Terglobo
Fahrenheitstraat 1
5223 BJ 's-Hertogenbosch
06 25 31 49 83
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