Re: Exporting SVG

[guilhelm savin <guilhelm.savin AT gmail.com>]

I push a fix on the github repository https://github.com/graphstream/gs-core.
You should use FileSinkSVG2. which is the prototype of the next svg sink. It should handle most of the style and produce valid svg.

Don't forget that the `ui.color` attribute has to be included in [0,1].

Hope it works!

Guilhelm

2013/8/30 Dave Murray-Rust <d.murray-rust AT ed.ac.uk>

Hi, thanks for the FileSinks suggestion, I've been experimenting, but haven't found a good solution.

I'm making my graph and screenshots like this:

val graph = Graphs.synchronizedGraph( new MultiGraph("Messages") )
...
val fs = new FileSinkSVG2
fs.writeAll(graph,file)

The results are:
* If I use FileSinkSVG, I get a broken SVG file - it's missing the closing tag, and just seems to have some lines in. (attached)
* If I use FileSinkSVG2, it falls over on dynamic styles - appears to be an issue in the colour calculation code[1]
* If I get rid of the dynamic styles, I get an SVG, but without any text, and at least some of the styling is not done (e.g. edges are not coloured). (attached)
* If I use FileSinkImages, I get PNGs, but the rendering is quite different to onscreen - I can give more details if useful.
* If I use renderer.screenshot("output.png"…), then it works fine, and I get lovely pictures - but I'd like to get SVGs.

It looks to me like the renderer.screenshot method will generally provide more accurate reproductions, as it's using exactly the same rendering code rather than trying to maintain a duplicate copy - I guess it's the dependency on Batik that makes it less desirable?

Thanks!
dave

--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.

[1]
[WARNING] no x attribute for node "created_1" false
[WARNING] no x attribute for node "created_1" false
[WARNING] no x attribute for node "created_1" false
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
        at java.util.ArrayList.rangeCheck(ArrayList.java:635)
        at java.util.ArrayList.get(ArrayList.java:411)
        at org.graphstream.stream.file.FileSinkSVG2$SVGStyle.getElementStyle(FileSinkSVG2.java:804)
        at org.graphstream.stream.file.FileSinkSVG2$SVGContext.writeElement(FileSinkSVG2.java:348)
        at org.graphstream.stream.file.FileSinkSVG2$SVGContext.writeElements(FileSinkSVG2.java:318)
        at org.graphstream.stream.file.FileSinkSVG2.writeAll(FileSinkSVG2.java:157)
        at org.graphstream.stream.file.FileSinkSVG2.writeAll(FileSinkSVG2.java:120)
        at com.moseph.scalsc.visualisation.GraphstreamMessageGraph$class.screenshot(GraphstreamGraph.scala:59)
        at com.moseph.scalsc.visualisation.MessageSequenceDisplay$.screenshot(MessageSequence.scala:15)
        at com.moseph.scalsc.informal.semantics.TwitterSemanticiserRunner$delayedInit$body.apply(TwitterSemantics.scala:49)
        at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
        at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
        at scala.App$$anonfun$main$1.apply(App.scala:71)
        at scala.App$$anonfun$main$1.apply(App.scala:71)
        at scala.collection.immutable.List.foreach(List.scala:318)
        at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:32)
        at scala.App$class.main(App.scala:71)
        at com.moseph.scalsc.informal.semantics.TwitterSemanticiserRunner$.main(TwitterSemantics.scala:24)
        at com.moseph.scalsc.informal.semantics.TwitterSemanticiserRunner.main(TwitterSemantics.scala)

On 30 Aug 2013, at 11:32, Dave Murray-Rust <d.murray-rust AT ed.ac.uk> wrote:

> I've been trying to use renderer.screenshot(file,width,height), as I got the impression from the docs that this was the best way to do things. Should I be using the FileSink methods?
>
> Versions:
> <dependency>
>       <groupId>org.graphstream</groupId>
>       <artifactId>gs-core</artifactId>
>       <version>1.2</version>
> </dependency>
> <dependency>
>       <groupId>org.graphstream</groupId>
>       <artifactId>gs-ui</artifactId>
>       <version>1.2</version>
> </dependency>
>
> Thanks!
> dave
>
> On 30 Aug 2013, at 10:32, guilhelm savin <guilhelm.savin AT gmail.com> wrote:
>
>> Hi Dave, and thanks
>>
>> There should not have such deps.
>> Which version of gs-core are you using? And which sink? FileSinkSVG or FileSinkSVG2?
>>
>> Regards
>> Guilhelm
>>
>>
>> 2013/8/30 Dave Murray-Rust <d.murray-rust AT ed.ac.uk>
>> I'd like to export SVG from graphs. Looking at the code, it seems like there is stuff in place to do this. However, I'm missing org.graphstream.ui.batik.BatikGraphics2D, and it doesn't seem to be in the source repo.
>>
>> Where can I find this?
>>
>> Cheers,
>> dave
>>
>> p.s. - thanks for a fantastic library, really enjoying using it!
>> --
>> The University of Edinburgh is a charitable body, registered in
>> Scotland, with registration number SC005336.
>>
>>
>>
>>
>> --
>> Guilhelm Savin
>> PhD Student of Computer Science
>> LITIS, University of Le Havre
>> \/\/\/\/\/\/
>> http://gsavin.lewub.org
>> http://d3-project.org
>> http://iscn.univ-lehavre.fr
>> http://graphstream-project.org
>> /\/\/\/\/\/\
>

--
Guilhelm Savin
PhD Student of Computer Science

LITIS, University of Le Havre
\/\/\/\/\/\/

http://gsavin.lewub.org

http://d3-project.org
http://iscn.univ-lehavre.fr
http://graphstream-project.org
/\/\/\/\/\/\