Thanks Philip, I will have a look at the SWTChart code to see if it might work better for this.
I do fear that most chart line trace implementations I have seen seem to do the convert to pixel space as part of the draw (rather than having a separate layer to deal with this). This makes swapping the screen
renderer for an SVG renderer pretty much impossible, since all the drawing is done with integer precision (that’s all you need for pixels), whereas an SVG needs floating point.
Thanks again,
Jake
From: science-iwg-bounces@xxxxxxxxxxx [mailto:science-iwg-bounces@xxxxxxxxxxx]
On Behalf Of Philip Wenig
Sent: 27 November 2017 12:49
To: science-iwg@xxxxxxxxxxx
Subject: Re: [science-iwg] Publication Quality Plotting
Hi Jake,
you could use the SWTChart extensions for that:
https://github.com/eclipse/eavp/blob/chemclipse/org.eclipse.eavp.service.swtchart/Build.txt
See attached some screenshots. It's possible to add new export option. The library is generic, so the export converters are applicable on all the data which can be displayed with the SWTChart extension. Menu extension can be added via code or via an extension
point:
org.eclipse.eavp.service.swtchart.demos.parts.LineSeries_3_Part
/*
* Add menu items.
*/
chartSettings.addMenuEntry(new ZoomInHandler());
chartSettings.addMenuEntry(new ZoomOutHandler());
//
applySettings(chartSettings);
org.eclipse.eavp.service.swtchart.demos.plugin.xml
<extension
point="org.eclipse.eavp.service.swtchart.menuitems">
<MenuItemSupplier
MenuEntry="org.eclipse.eavp.service.swtchart.demos.menu.ResetXAxisHandler">
</MenuItemSupplier>
<MenuItemSupplier
MenuEntry="org.eclipse.eavp.service.swtchart.demos.menu.ResetYAxisHandler">
</MenuItemSupplier>
</extension>
At the moment, export to *.png, ... as well as to an R script is supported. To match your needs, we could add new SVG, EPS, ... export converter here:
org.eclipse.eavp.service.swtchart.menu.export
In this case, we have to options:
A) Do a generic implementation to export the data to *.svg format. This would be the easiest one.
B) Use VectorGraphics2d [1]. This extension needs to be installed separately as it LGPL based.
Let's chat the next days.
Best,
Philip
[1] http://trac.erichseifert.de/vectorgraphics2d/
Dear Science Working Group,
Sorry to bother you again, but your advice on jzy3d was excellent, and we again have a question that you might be able to help with.
Our users keep asking for publication quality plotting (2d rather than 3d this time). Now to me this means SVG/PDF/EPS, at the full resolution of the data.
We currently use the Nebula XYGraph, and have an export to SVG (I think using some old Graphiti code to bridge to the SVGGraphics2D in batik), but it is rubbish. I think this is because XYGraph’s line trace downsamples the data, so that
it doesn’t draw to the same pixel twice, but also because the trace directly uses the draw2D graphics drawLine to draw directly to the screen in pixel co-ordinates, not to the co-ordinate frame of the graph. This gives us an SVG that looks little better than
a bitmap (see attached screenshot from inkscape, inset shows what zoomed in data should look like).
I know many people on here use SWTChart, does anyone know if this is likely to suffer the same issue? Does anyone have any other suggestions of a swt-compatible plotting library that might better support SVG export?
Kind regards,
Jake
Dr Jacob Filik
Senior Software Scientist
Tel: +441235 77 8690
Diamond Light Source Ltd.
Diamond House
Harwell Science & Innovation Campus
Didcot
Oxfordshire
OX11 0DE
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