How to make GWT DatePicker to use Monday as the first day of the week?

Question

Pretty much, what the title says. I need to make the GWT DatePicker component use Monday as the first day of the week. Currently the day labels are S M T W T F S

Answer 1

If the automatic locale detection doesn't fit your needs (and probably editing the firstDayOfTheWeek in com.google.gwt.i18n.client.constants.DateTimeConstantsImpl_xy.properties won't be either), the only option would be to modify the implementation of DatePicker:

• Extend DatePicker, write a new constructor which calls the protected DatePicker(MonthSelector monthSelector, CalendarView view, CalendarModel model) constructor with your own view and model.

• The CalendarModel can be extended, so you'd have to override getCurrentFirstDayOfFirstWeek.

• The DefaultCalendarView is final, so you'd have to copy it to a new class and modify its setup method.

It's quite messy, and that's the little downside of GWT - it makes heavy use of Singletons instead of Dependency Injection...