Example usage for com.google.gwt.user.client.ui SuggestBox addKeyDownHandler

Introduction

In this page you can find the example usage for com.google.gwt.user.client.ui SuggestBox addKeyDownHandler.

Prototype

public HandlerRegistration addKeyDownHandler(KeyDownHandler handler) 

Source Link

Usage

From source file:de.uni_koeln.spinfo.maalr.webapp.ui.common.client.ConfigurableSearchArea.java

License:Apache License

private Widget buildOracle(final UiField field) {
    MultiWordSuggestOracle oracle = new MultiWordSuggestOracle() {

        @Override/*  w  w w.  ja  va 2s . co m*/
        public void requestSuggestions(final Request request, final Callback callback) {
            service.getSuggestions(field.getId(), request.getQuery(), request.getLimit(),
                    new AsyncCallback<List<String>>() {

                        @Override
                        public void onFailure(Throwable caught) {
                        }

                        @Override
                        public void onSuccess(List<String> result) {
                            Response response = new Response();
                            List<Suggestion> suggestions = new ArrayList<Suggestion>();
                            for (String string : result) {
                                suggestions.add(new MultiWordSuggestion(string, string));
                            }
                            response.setSuggestions(suggestions);
                            callback.onSuggestionsReady(request, response);
                        }
                    });

        }

    };
    final SuggestBox box = new SuggestBox(oracle);
    box.setValue(field.getInitialValue());

    box.getValueBox().addClickHandler(new ClickHandler() {

        @Override
        public void onClick(ClickEvent event) {
            String old = oracleHistory.get(field.getId());
            if (old != null) {
                box.getValueBox().setText(old);
            }
            box.getValueBox().selectAll();
            box.showSuggestionList();
        }
    });

    box.addKeyDownHandler(new KeyDownHandler() {

        @Override
        public void onKeyDown(KeyDownEvent event) {
            if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
                box.getValueBox().selectAll();
                event.stopPropagation();
                event.preventDefault();
                box.setFocus(true);
                fireDelayedUpdate();
            }
        }
    });

    box.addKeyUpHandler(new KeyUpHandler() {

        @Override
        public void onKeyUp(KeyUpEvent event) {
            if (box.getValue() == null || box.getValue().trim().length() == 0) {
                currentValues.remove(field.getId());
            } else {
                currentValues.put(field.getId(), box.getValue());
            }
            oracleHistory.put(field.getId(), box.getValue());
            //fireDelayedUpdate();
        }

    });
    box.addSelectionHandler(new SelectionHandler<SuggestOracle.Suggestion>() {

        @Override
        public void onSelection(SelectionEvent<Suggestion> event) {
            String string = event.getSelectedItem().getReplacementString();
            if (box.getValue() == null || box.getValue().trim().length() == 0) {
                currentValues.remove(field.getId());
            } else {
                currentValues.put(field.getId(), string);
            }
            fireDelayedUpdate();
        }
    });
    return box;
}

---