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https://issues.apache.org/jira/browse/OPENMEETINGS-427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16081946#comment-16081946
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Maxim Solodovnik commented on OPENMEETINGS-427:
-----------------------------------------------
Working JS code for 4.0.0
{code:javascript}
var evt = new MouseEvent('click', {
view: window,
bubbles: false,
cancelable: true
});
var a = document.createElement('a');
a.setAttribute('download', 'MY_COOL_IMAGE.png');
a.setAttribute('href',
$('#wb-tab-0').data().getCanvas().toDataURL({format:'png', width: 1275, height:
1650, left: 0, top: 0}));
a.setAttribute('target', '_blank');
a.dispatchEvent(evt);
{code}
multiple canvases might be sent to server start PDF download (pdfbox)
> ExportPDF
> ---------
>
> Key: OPENMEETINGS-427
> URL: https://issues.apache.org/jira/browse/OPENMEETINGS-427
> Project: Openmeetings
> Issue Type: Improvement
> Reporter: Allemand Sylvain
> Fix For: 4.0.0
>
> Attachments: OPENMEETINGS-427-ExportPDF.patch
>
>
> Hello,
> I worked on implementation of a new functionality : the export of a PDF file
> with the corresponding painted objects (annotations).
> I found a starting solution in the ExportToImage.java file.
> The current only permits exporting painted objects in SVG format.
> To implement Export PDF, my approach was :
> get painted objects corresponding to each page of the PDF file
> convert per slide all objects in one SVG file.
> Convert resulting SVG files to PDF files (with Batik Rasterizer library : Fop
> and Avalon library were needed by Batik Rasterizer). Each SVG file is cropped
> according to the original current PDF page size (by this way, PDF document
> with multi-size pages is possible).
> If none objects are painted on a slide, I create a blank PDF page (because
> the overlay function needs two document with same amount of page and same
> page sizes).
> Merge all PDF files in one.
> Overlay this PDF file in the original PDF file.
> Send the result file to explorer and delete temporary files (and delete
> result file in the end).
> The resulting PDF is more or less the same size than the original PDF file
> (only depending on the number of painted objects)
> Enjoy the result
> i got some problems :
> i try to get the swfzoom value. I create an accessor but i have an error on
> execution (Null Exception). I can't get this value, so for the moment, i stay
> with a value of 72 dpi. (this value is very important for the convert
> function SVG to PDF.
> I also comment the cropping of orginal PDF file to keep orginal page size for
> the original document.
> (poly2bitmap option in GenerateSWF.java).
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