Charts: How to set timezone?

Flow
1

I tried to set a timezone to a chart, which is different to the current UI locale.

There is a com.vaadin.addon.charts.model.Global class with setTimezoneOffset(), but how to retrieve or add this object to the Configuration? There is no single reference to this class.

2

The only way i found to set the timezone is:

JavaScript.getCurrent().execute("Highcharts.setOptions({\n" + " global: {\n" + " useUTC: true,\n" + " timezoneOffset: "+ timezoneOffsetInMinutes + "\n" + " }\n" + "});"); Its a bit hacky but ok.

In this case you should not use the broken com.vaadin.addon.charts.util.Util which is used by DataSeriesItem to transform a Date, because it uses hardcoded system timezone. There are remaining problems with wrong times i hope to resolve soon.

So i have to say that custom timezones are not really support by the current VaadinCharts Addon :frowning:

3

Your workaround seems to do the job :-), but what about the concurrency ?
I mean, are the new settings shared by all active users ?
If, inside a View, user A is changing the timezone of the displayed chart (using JavaScript.getCurrent().execute()), will it also affect user B when he will open the same View (with other data) ?

4

JavaScript.getCurrent() only affects the current page of the current user.