Think I've got it now.
Added:
countryDDC.clearInput();
countryDDC.setModelObject(null);
regionDDC.clearInput();
regionDDC.setModelObject(null);
target.addComponent(countryDDC);
target.addComponent(regionDDC);
to the area DropDownChoice onchange:
areaDDC.add(new AjaxFormComponentUpdatingBehavior("onchange") {
protected void onUpdate(AjaxRequestTarget target) {
countryDDC.clearInput();
countryDDC.setModelObject(null);
regionDDC.clearInput();
regionDDC.setModelObject(null);
target.addComponent(countryDDC);
target.addComponent(regionDDC);
}
});
Resets both country and region when the area changes.
I've learnt a lot from working through this use case.
Steve
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