| New file |
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| 0,0 → 1,172 |
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| package org.tela_botanica.del.client.composants.formulaires.autocompletion; |
| |
| import com.google.gwt.event.dom.client.HasKeyPressHandlers; |
| import com.google.gwt.event.dom.client.KeyPressEvent; |
| import com.google.gwt.event.dom.client.KeyPressHandler; |
| import com.google.gwt.event.logical.shared.HasSelectionHandlers; |
| import com.google.gwt.event.logical.shared.SelectionEvent; |
| import com.google.gwt.event.logical.shared.SelectionHandler; |
| import com.google.gwt.http.client.Request; |
| import com.google.gwt.http.client.RequestBuilder; |
| import com.google.gwt.http.client.RequestCallback; |
| import com.google.gwt.http.client.RequestException; |
| import com.google.gwt.http.client.Response; |
| import com.google.gwt.http.client.URL; |
| import com.google.gwt.user.client.Timer; |
| import com.google.gwt.user.client.ui.HasWidgets; |
| import com.google.gwt.user.client.ui.IsWidget; |
| import com.google.gwt.user.client.ui.SuggestOracle; |
| import com.google.gwt.user.client.ui.SuggestOracle.Suggestion; |
| |
| public abstract class AutoCompletionComboBoxPresenteur { |
| |
| public interface Vue extends IsWidget { |
| public void ajouterVue(HasWidgets composite); |
| public HasKeyPressHandlers getSuggestBoxHasKeyPressHandlers(); |
| public String getValeur(); |
| public void remplirListe(String[] suggestions); |
| public void afficherSuggestions(SuggestOracle.Request request,SuggestOracle.Callback response); |
| public void afficherListeDeroulante(); |
| public void nettoyer(); |
| public void setValeur(String valeur); |
| HasSelectionHandlers<Suggestion> getSuggestBoxHasSelectionChangeHandlers(); |
| } |
| private Vue autoCompletionComboBoxVue; |
| |
| SuggestOracle.Request requeteOracle; |
| SuggestOracle.Callback callBackOracle; |
| |
| Timer suggestionTimer = null; |
| int tempsAvantRequete = 500; |
| |
| String urlRequete = ""; |
| |
| public AutoCompletionComboBoxPresenteur(Vue vue, String urlRequete) { |
| this.autoCompletionComboBoxVue = vue; |
| this.urlRequete = urlRequete; |
| gererEvenements(); |
| } |
| |
| public void go(HasWidgets composite) { |
| autoCompletionComboBoxVue.ajouterVue(composite); |
| } |
| |
| public void gererEvenements() { |
| autoCompletionComboBoxVue.getSuggestBoxHasKeyPressHandlers().addKeyPressHandler(new KeyPressHandler() { |
| public void onKeyPress(KeyPressEvent event) { |
| if(event.getUnicodeCharCode() != 0) { |
| gererTimer(); |
| } |
| } |
| }); |
| |
| requeteOracle = new SuggestOracle.Request(); |
| callBackOracle = new SuggestOracle.Callback() { |
| |
| public void onSuggestionsReady(SuggestOracle.Request request, SuggestOracle.Response response) { |
| autoCompletionComboBoxVue.afficherListeDeroulante(); |
| } |
| }; |
| |
| autoCompletionComboBoxVue.getSuggestBoxHasSelectionChangeHandlers().addSelectionHandler(new SelectionHandler<SuggestOracle.Suggestion>(){ |
| @Override |
| public void onSelection(SelectionEvent<Suggestion> event) { |
| surSelectionSuggestion(event.getSelectedItem().getReplacementString()); |
| } |
| }); |
| } |
| |
| public void gererTimer() { |
| if(suggestionTimer == null) { |
| suggestionTimer = new Timer() { |
| public void run() { |
| requeteSuggestions(); |
| } |
| }; |
| suggestionTimer.schedule(tempsAvantRequete); |
| } else { |
| suggestionTimer.schedule(tempsAvantRequete); |
| } |
| } |
| |
| public void setTempsAvantRequete(int temps) { |
| tempsAvantRequete = temps; |
| } |
| |
| public int getTempsAvantRequete(int temps) { |
| return tempsAvantRequete; |
| } |
| |
| public String getValeur() { |
| return autoCompletionComboBoxVue.getValeur(); |
| } |
| |
| public void setValeur(String taxon) { |
| autoCompletionComboBoxVue.setValeur(taxon); |
| } |
| |
| public void nettoyer() { |
| autoCompletionComboBoxVue.nettoyer(); |
| } |
| |
| public void requeteSuggestions() { |
| |
| final String requete = autoCompletionComboBoxVue.getValeur(); |
| String requeteAjax = effectuerPreTraitementChaineRequete(requete); |
| String urlProxy = URL.encode(urlRequete+requeteAjax); |
| |
| RequestBuilder rb = new RequestBuilder(RequestBuilder.GET, urlProxy) ; |
| try { |
| rb.sendRequest(null, new RequestCallback() { |
| public void onError(final Request request, final Throwable exception) { |
| // TODO Auto-generated method stub |
| |
| } |
| |
| public void onResponseReceived(final Request request, |
| final Response response) { |
| surReponseRequete(requete, response); |
| } |
| }) ; |
| |
| } catch (RequestException e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } |
| } |
| |
| public void surReponseRequete(String requete, Response response) { |
| String[] valeurs = parserResultatRequete(response); |
| |
| autoCompletionComboBoxVue.remplirListe(valeurs); |
| requeteOracle.setQuery(requete); |
| autoCompletionComboBoxVue.afficherSuggestions(requeteOracle, callBackOracle); |
| } |
| |
| protected void surSelectionSuggestion(String suggestion) { |
| return; |
| } |
| |
| /** |
| * Permet d'intervenir sur la chaine tapée par l'utilisateur avant que celle-ci ne soit passée |
| * à la requête asynchrone pour pouvoir la formater (pour mettre en minuscule, séparer des termes) |
| * par défaut renvoie la chaine telle quelle, à surcharger au besoin |
| * @param String requete chaine de recherche contenant ce que l'utilisateur à tapé |
| * @return String une chaine transformée |
| */ |
| protected String effectuerPreTraitementChaineRequete(String requete) { |
| return requete; |
| } |
| |
| /** |
| * Parse les résultats de la requete afin de pouvoir les utiliser à implémenter par le |
| * composants qui crée la combobox selon le contexte et le web service appelé. |
| * @param Response la réponse à la requête asynchrone |
| * @return String[] le tableau des suggestions qui sera affiché dans la combobox |
| */ |
| protected abstract String[] parserResultatRequete(Response response); |
| |
| public Vue getAutoCompletionComboBoxVue() { |
| return autoCompletionComboBoxVue; |
| } |
| } |