I'm not sure about your Article/Category model and the extension of
ProxyRenderer but here is how I use ValueListBox in my editors:
// Defining a ValueListBox which holds country name in my pojo
@UiField(provided = true)
ValueListBox<String> country;
// Creating the ValueListBox
country = new ValueListBox<String>(new Renderer<String>()
{
@Override
public String render(String object)
{
return object;
}
@Override
public void render(String object, Appendable appendable) throws IOException
{
}
});
// Adding values to the ValueListBox
country.setAcceptableValues(/*list of Strings*/);
This example works fine for me..
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