Thanks much for the pointers, but I had to do a bit more guesswork to get things working, because my application had no widgetset to begin with (as many people I suspect, I started with AddressBook and mutated it)
A ) The first thing to do is to edit web.xml to add a widget set named after your application
1 2 <servlet>
3 <servlet-name>CompetitionApplication</servlet-name>
4 <servlet-class>com.vaadin.terminal.gwt.server.ApplicationServlet</servlet-class>
5 <init-param>
6 <param-name>application</param-name>
7 <param-value>org.concordiainternational.competition.ui.CompetitionApplication</param-value>
8 </init-param>
9 <init-param>
10 <description>Application widgetset</description>
11 <param-name>widgetset</param-name>
12 <param-value>org.concordiainternational.competition.ui.CompetitionApplicationWidgetset</param-value>
13 </init-param>
14 </servlet>
B ) You need to create a .xml file next to the application's .java (in this case, CompetitionApplicationWidgetset.gwt.xml ). with the following content (adjust for the various widget sets you are including)
1<module>
2 <!-- Inherit super widgetset -->
3 <inherits name="com.vaadin.terminal.gwt.DefaultWidgetSet" />
4 <inherits name="com.vaadin.incubator.superimmediatetextfield.SuperimmediatetextfieldApplicationWidgetset" />
5 <inherits name="com.vaadin.incubator.refresher.RefresherApplicationWidgetset" />
6</module>
C ) Drop the various jars for the widgetsets in your WEB-INF/lib (I took the Refresher and SuperImmediateTextField jars)
D ) If you want to recompile your widget set, there is a vaadin logo in the toolbar after you install the plugin. In theory you should be able to click on your project and trigger a recompile, but for some reason, this has stopped working for me. What seems to work reliably is to click on the .gwt.xml file that defines the widgetset, and then click on the icon.
Answer