Charts export to pdf (special characters)

Flow
1

I’m exporting Vaadin charts analogous as described here:

https://github.com/vaadin/charts/tree/master/chart-export-demo


https://github.com/vaadin/charts/blob/master/chart-export-demo/src/main/java/com/vaadin/demo/chartexport/util/PdfExportDemo.java

Chart > to svg with SVGGenerator > to Image via Batik > itext.

However, I have some special characters in the StackLabels/Chart caption (eg €, -,…) which are not displayed correctly in the resulting pdf. Where can I set the correct encoding?

2

Hi,

Try specifying the correct encoding when creating the iText font by using one of the getFont methods that accepts encoding as the second parameter. See the java doc here:
http://api.itextpdf.com/itext/com/itextpdf/text/FontFactory.html

HTH,
/Jonatan

3

Hi Jonathan,

thanks fo the input! I suspect the problem is not iText but the SVGGenerator? I only have problems with certain special characters in the chart. For example, if the chart title contains
\u20AC € @&%
the resulting String from
String svg = SVGGenerator.getInstance().generate(conf)
is
� � @&%.

So only the € seems to make a problem…Any ideas?

17250.pdf (28.4 KB)

4

also suboptimal is that the exporting menu is exported also to the svg image. is there a way to change that?
17266.png

5

created a ticket…
http://dev.vaadin.com/ticket/15315

6

Hello all,

I have the same problem when generating svg from Chart using SVGGenerator. All German Umlaute like ü, ä or ö are converted to the same 3 bytes 0xEF, 0xBF, 0xBD which are displayed as �. This seems to be a general problem of the SVGGenerator.

Is there any solution for this?

Thanks for your help
Rolf

7

Hi,

There has been some issues with special characters and SVGGenerator like
#18992
 in the past, but afaik they’re solved and released.

What version of Vaadin Charts are you using? On what plaftorm is it failing?

Regards,

Guille

8

Hi Guille,

I used Charts 2.0. After updating to Charts 3.0 the problem was fixed. But then rotated labels on the x-axis where NOT rotated in the chart but in the exported pdf. This seems to be a bug in 3.0. I then changed to Charts 2.1.3 and now everything is working fine.

Thanks for your help
Rolf

9

I’m glad you found a solution!

Regarding the charts 3 issue with rotated labels can you create a ticket in
https://dev.vaadin.com/
 with the details to reproduce it?

10

Sorry, that was my fault. I forgot to compile the widgetset. Now charts 3 is working fine…