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Re: [swtchart-dev] GSoC 2019 : Extending the export options project
Hi Philip, hope you are doing well.
Here is a link to my draft proposal, please let me know what you think :)

On Mon, Apr 1, 2019 at 9:26 PM Philip Wenig <philip.wenig@xxxxxxxxxxxxx> wrote:
Yep, have a look at the ImageFactory in SWTChart Extensions:

ImageFactory<ChromatogramChart> imageFactory = new ImageFactory<ChromatogramChart>(ChromatogramChart.class, 800, 600);
ChromatogramChart chromatogramChart = imageFactory.getChart();
chromatogramChart.setBackground(chromatogramChart.getBaseChart().getDisplay().getSystemColor(SWT.COLOR_WHITE));
...
imageFactory.saveImage(exportFolder + File.separator + prefix + ".png", SWT.IMAGE_PNG);

On a headless Linux server, Xvfb could be utilized. Otherwise, resolution is limited by Display size.


Best,
Philip

Am 01.04.19 um 17:09 schrieb Sanatt Abrol:
Great.
Also, how do you like the idea of converting our base scrollable chart into an image and then converting into a PDF? We can give the user some options like deciding page size, adjusting alignment, adding text, etc? This could be done under the extensions menu for SWTChart and then open a fileChooser to get the URI for the final pdf file. 

Also I found out, that in Java, all rendering goes through the Graphics2D abstract class. We can SVGGenerator2D class from the Apache Batik project to create .svg files for our charts.

We can repeat the same process for conversion to .eps format. I've found multiple examples on the Apache XMLGraphics project which illustrate this.
I'll be adding them to my draft proposal and share them with you soon.

Also, I've noticed that many students are posting their proposal drafts on the [soc-dev] mailing list. Is it ok, if I post a link to my draft proposal in [swtchart-dev] instead of [soc-dev]?

On Mon, Apr 1, 2019 at 7:19 PM Philip Wenig <philip.wenig@xxxxxxxxxxxxx> wrote:
Yep, on all projects we're working on the development branch.

The exported LaTeX table could be pasted in a *.tex document. Sure, it would be great if the export offers a Clipboard solution too or a way to export an LaTeX image. This could be part of the GSoC proposal.


Best,
Philip

Am 01.04.19 um 15:45 schrieb Sanatt Abrol:
Yes, found it thank you. I was looking in the 'master' branch earlier. It was in the 'develop' branch.

About copying LaTeX table to clipboard. Do we have to simply put the LaTeX table generated by the tableExportHandler to the system clipboard?


On Mon, Apr 1, 2019, 7:05 PM Philip Wenig <philip.wenig@xxxxxxxxxxxxx> wrote:
Hi Sanatt,

the PDFBox extensions, which I've written, are part of ChemClipse:

org.eclipse.chemclipse.pdfbox.extensions
org.eclipse.chemclipse.pdfbox.extensions.fragment.test

git://git.eclipse.org/gitroot/chemclipse/org.eclipse.chemclipse.chemclipsecore.git

We probably could move the Code from ChemClipse to SWTChart.

It would be great if the user could select page size, alignment, etc.. The PDFBox extension PageUtil should contain already many of the desired alignment features. Some are missing like print a polygon or print the Bar, Line, Scatter chart. This could be part of the work.

In SWTChart, we already have a LaTeX table export on board. This might match your needs. Have you already had a look at TeXClipse?

https://projects.eclipse.org/proposals/eclipse-texlipse


Best,
Philip

Am 01.04.19 um 15:26 schrieb Sanatt Abrol:
Hi Philip, 
I was working on writing the proposal and I can't find org.eclipse.chemclipse.pdfbox.extensions Is this moved elsewhere?
Earlier, I found this bug report with an example on how to use the PDFBox library.

Also, when adding the PDF export option, I think it would be helpful to give the user options to select page size, alignment options, insert captions, etc. What do you think about this? 

We also need to copy a pre-built LaTeX table to the clipboard. Is this the same LaTeX table exported from org.eclipse.swtchart.extensions.menu.export.LaTeXTableExportHandler.java

Best,
Sanatt

On Wed, Mar 27, 2019 at 5:32 PM Sanatt Abrol <sanatt.abrol.in@xxxxxxxxx> wrote:
I will :)
Thanks a lot.

On Wed, Mar 27, 2019 at 2:09 PM Philip Wenig <philip.wenig@xxxxxxxxxxxxx> wrote:
Yep, that sounds like a good plan. Apache is a good choice and Apache Batik and others are already listed in Eclipse Orbit:
https://download.eclipse.org/tools/orbit/downloads/drops/R20190226160451/

It means, that when can use them out of the box.
Please share your proposal and keep an eye on the GSoC deadlines.


Best,
Philip

Am 27.03.19 um 09:34 schrieb Sanatt Abrol:
Hi Philip, 
Thank you for your quick reply. Yes, I am interested in doing this project as part of GSoC 2019. I am sorry for being late to the party :P as I was travelling abroad for the past three weeks and unable to give this the required effort. I've looked into the code base, we can add new export handlers to org.eclipse.swtchart.extensions.menu.export package.

I'll look into the PDFBox library and see how we can use it for our purpose. Your work on the chemclipse project is really helpful.
For .svg and .eps formats, which are basically XML files, I suggest we use Apache XML Graphics Project which has a similar license to Apache PDFBox. Please let me know what you think about this.

I will share with you a draft proposal by April 2nd which will give us a week's time to make required changes before the April 9th deadline. 

Danke,
Sanatt


On Wed, Mar 27, 2019 at 12:21 PM Philip Wenig <philip.wenig@xxxxxxxxxxxxx> wrote:
Hi Sanatt,

iText s licensed under the AGPL, so it will never find its way into the Eclipse ecosystem.That's why I would recommend to use Apache PDFBox. We already have a CQ in ChemClipse for Apache PDFBox version 2.0.6. So I would recommend trying to bring 2.0.6. and the latest version 2.0.14 to Eclipse Orbit so that it can be easily re-used by Eclipse projects:

Apache PDFBox
https://pdfbox.apache.org

Eclipse Orbit
https://download.eclipse.org/tools/orbit/downloads/drops/R20190226160451/

PDFBox is a powerful library. But it needs some knowledge to align elements like text, images. Especially if you'd like to layout a report e.g. in DIN A4 with center top left and scale mm. That's why I have already written an extension to use this library in a more convenient way:

https://git.eclipse.org/c/chemclipse/org.eclipse.chemclipse.chemclipsecore.git?h=develop
org.eclipse.chemclipse.pdfbox.extensions
org.eclipse.chemclipse.pdfbox.extensions.fragment.test -> see options in PageUtil_1_ITest

Writing an export converter for SWTChart is a great idea. It's already possible to add new export converter via two options

A) add a menu extension
B) register an extension via the extension point

Have a look at the example bundle (org.eclipse.swtchart.extensions.examples) package (org.eclipse.swtchart.extensions.examples.menu):

A) ZoomInHandler... -> chartSettings.addMenuEntry(new ZoomInHandler());
B) ResetXAxisHandler... -> MenuEntry="org.eclipse.swtchart.extensions.examples.menu.ResetXAxisHandler"

I've also played with the library VectorGraphics2d, but it is licensed under the GPL (see problem iText), so it can't be bundled with SWTChart:

https://github.com/eseifert/vectorgraphics2d
https://github.com/OpenChrom/swtchartvectorgraphics/tree/develop

So, I could be a mentor to help you implementing extensions via the GSoC program. Student applications period is open until April, 9th. Do you plan to attend and to submit a proposal?

https://summerofcode.withgoogle.com/dashboard/timeline/


Best,
Philip

Am 26.03.19 um 18:32 schrieb Sanatt Abrol:
Hi everyone, I hope you are doing well. We need to add new export options like .pdf,  .svg etc.
I was doing some research over this and found iText and Apache PDFBox as libraries we can use to export our 'imageData'.
iText has both free and commercial license which I doubt we can use in our case. Apache PDFBox however is open-source.
Is it possible to use Apache PDFBox for our project? 
If not, then I suppose we are required to write our own 'pdf exporter' which is something I think the whole Eclipse community can benefit from (if something like this is not already written by the community).

Please let me know what you think :)
Regards, 
Sanatt

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~~~~~~~~~~~~~~~~~~~~~~~~
OpenChrom - the open source alternative for chromatography / mass spectrometry
Dr. Philip Wenig » Founder » philip.wenig@xxxxxxxxxxxxx » http://www.openchrom.net
~~~~~~~~~~~~~~~~~~~~~~~~
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-- 
~~~~~~~~~~~~~~~~~~~~~~~~
OpenChrom - the open source alternative for chromatography / mass spectrometry
Dr. Philip Wenig » Founder » philip.wenig@xxxxxxxxxxxxx » http://www.openchrom.net
~~~~~~~~~~~~~~~~~~~~~~~~
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-- 
~~~~~~~~~~~~~~~~~~~~~~~~
OpenChrom - the open source alternative for chromatography / mass spectrometry
Dr. Philip Wenig » Founder » philip.wenig@xxxxxxxxxxxxx » http://www.openchrom.net
~~~~~~~~~~~~~~~~~~~~~~~~
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-- 
~~~~~~~~~~~~~~~~~~~~~~~~
OpenChrom - the open source alternative for chromatography / mass spectrometry
Dr. Philip Wenig » Founder » philip.wenig@xxxxxxxxxxxxx » http://www.openchrom.net
~~~~~~~~~~~~~~~~~~~~~~~~
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-- 
~~~~~~~~~~~~~~~~~~~~~~~~
OpenChrom - the open source alternative for chromatography / mass spectrometry
Dr. Philip Wenig » Founder » philip.wenig@xxxxxxxxxxxxx » http://www.openchrom.net
~~~~~~~~~~~~~~~~~~~~~~~~
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