Doesn't save you a lot but you can call any setter method through UiBinder
and I think you can pass any object to that setter as long as you define it
as a UiBinder reference using <ui:with> (not 100% sure, could also be that
only String, Enum, Integer, etc are allowed), e.g.
<ui:with field="quitCommand" type="com.google...ScheduledCommand" />
<g:MenuItem scheduledCommand="{quitCommand}" />
and in your Java file
@UiField(provided = true)
ScheduledCommand quitCommand = new ScheduledCommand() {
// ... implement
}
In the future, with Java8 support, this can become
@UiField(provided = true)
ScheduledCommand quitCommand = this::doQuit;
-- J.
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