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Vaadin Forum1. Vaadin Flow - Java

Export vaadin chart to CSV

Benjamin Larsen
5 years ago May 02, 2016 8:15am

Hi'

In my web application, the user is able to see a lot of data through graphs. 
I was wondering if it is possible to export the data to a CSV or excel file, simply to allow the user to manipulate the data offline. 

I've seen a lot of export-plugins, but since the data I want already is formatted and lies in the charts, it would be so awesome if it was possible to export these data.

Hope you guys can help :)

Have a great day - even though it's a monday ;-)

/Ben

Benjamin Larsen
5 years ago May 02, 2016 8:22am

I see the original software had a pluging for it: 
http://www.highcharts.com/plugin-registry/single/7/Export%20Data

Anybody knows if and how this could be compatible? 

Guillermo Alvarez
5 years ago May 05, 2016 7:48pm

Hi, 

I must admit I was a bit doubtful about how this would work, but did a small test and seems to be working fine.

  1. Add HighchartsPluginResources similar to HighchartResources class in client package and create a TextResource for the plugin js file.
  2. Add plugin js file in same folder but under src/main/resources.
  3. Create HighchartsPluginScriptLoader class extending HighchartsScriptLoader. Override injectResources so that both original and new plugin resources are injected.
  4. In project widgetset.gwt.xml file replace the original script loader with extended one:
<replace-with class="uy.com.chartexport.client.HighchartsPluginScriptLoader">
    <when-type-is class="com.vaadin.addon.charts.client.HighchartsScriptLoader"/>
</replace-with>

And remember to enable chart exporting.
 

+1
Guillermo Alvarez
5 years ago May 05, 2016 7:53pm

A simple project with the mentioned changes is available in github https://github.com/alvarezguille/charts-export-csv

Hope this helps!

+2
Benjamin Larsen
5 years ago Jun 28, 2016 9:43am

Hi!

Seems genious! :)
I tried it, but I can't seem to compile the widgetset, it can't find the scriptloader, even though it is in the right place.
[ERROR] Could not find uy.com.chartexport.client.HighchartsPluginScriptLoader in types compiled from source. Is the source glob too strict?
   [ERROR] Errors in 'com/vaadin/addon/charts/client/HighchartsScriptLoader.java'
      [ERROR] Line 27: Rebind result 'uy.com.chartexport.client.HighchartsPluginScriptLoader' could not be found
   Adding '1' new generated units

Why does it do this? It does exist, and in the right package. :-(

Guillermo Alvarez
5 years ago Jun 28, 2016 10:13am

For some reason I used uy in package name which you might've missed.
Is your HighchartsPluginScriptLoader also un uy.com.chartexport.... package?

Benjamin Larsen
5 years ago Jun 28, 2016 10:19am

Probably that!

After I changed the structure to the following and compiled the widgetset, it worked!
You're awesome mate!

[IMG]http://i68.tinypic.com/2e399at.jpg[/IMG]

 

Guillermo Alvarez
5 years ago Jun 28, 2016 10:20am

Cool! Glad it worked!