Vaadin 8 addTextChangeListener in Combobox

Flow
1

I need advice. I want track entered text in Combobox. TextField has addValueTextListener, but in Combobox this listener is absent. Tell me, please, how a can realize this?

2

In Vaadin 7, I’m extended Combobox:

public class TextChangeableComboBox extends ComboBox {

public TextChangeableComboBox() {}

public TextChangeableComboBox (String caption) {
    super(caption);
}

@Override
public void changeVariables(Object source, Map<String, Object> variables) {
    if (variables.containsKey("filter")) {
        final String text = variables.get("filter").toString();
        fireEvent(new FieldEvents.TextChangeEvent(this) {
            @Override
            public String getText() {
                return text;
            }

            @Override
            public int getCursorPosition() {
                return text.length();
            }
        });
    }
    super.changeVariables(source, variables);
}

public void addTextChangeListener(FieldEvents.TextChangeListener listener) {
    addListener(FieldEvents.TextChangeListener.EVENT_ID, FieldEvents.TextChangeEvent.class, listener, FieldEvents.TextChangeListener.EVENT_METHOD);
}

public void removeTextChangeListener(FieldEvents.TextChangeListener listener) {
    removeListener(FieldEvents.TextChangeListener.EVENT_ID, FieldEvents.TextChangeEvent.class, listener);
}

}
But how I can realize this in Vaadin 8?

3

Ssory, I’ve found deсision. I’m use FetchItemsCallback