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/*Auto-Completion Textbox for GWTCopyright (C) 2006 Oliver Albers http://gwt.components.googlepages.com/This library is free software; you can redistribute it and/ormodify it under the terms of the GNU Lesser General PublicLicense as published by the Free Software Foundation; eitherversion 2.1 of the License, or (at your option) any later version.This library is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNULesser General Public License for more details.You should have received a copy of the GNU Lesser General PublicLicense along with this library; if not, write to the Free SoftwareFoundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA*/package org.tela_botanica.client.vues;// TODO : traiter latence (augmenter en fonction rapidit� saisie + texte vide)// TODO : traitement espace apres l'espece (%20)// TODO : Utiliser Suggestbox et les Associating Data Transfer Objects (DTOs) with Suggestion Objectsimport com.google.gwt.user.client.ui.KeyboardListener;import com.google.gwt.user.client.ui.ListBox;import com.google.gwt.user.client.ui.PopupPanel;import com.google.gwt.user.client.ui.TextBox;import com.google.gwt.user.client.ui.Widget;import com.google.gwt.user.client.DOM;import com.google.gwt.user.client.Event;import java.util.Vector;import java.util.HashMap;import org.tela_botanica.client.interfaces.FournisseurListe;import org.tela_botanica.client.interfaces.Rafraichissable;public class AutoCompleteAsyncTextBox extends TextBox implements KeyboardListener {// Fournisseur de donneesprivate FournisseurListe fournisseurDeDonnees=null;private HashMap cache = new HashMap();private boolean searching = false;private Rafraichissable rafraichissable=null;protected PopupPanel choicesPopup = new PopupPanel(true);protected ListBox choices = new ListBox() {public void onBrowserEvent(Event event) {if (Event.ONCLICK == DOM.eventGetType(event)) {complete();}}};protected Vector items = new Vector();protected boolean visible = false;/*** Value linked to current text*/protected String currentValue = null;/*** Default Constructor**/public AutoCompleteAsyncTextBox(Rafraichissable r){super();rafraichissable=r;this.addKeyboardListener(this);choices.sinkEvents(Event.ONCLICK);this.setStyleName("AutoCompleteAsyncTextBox");choicesPopup.add(choices);choicesPopup.addStyleName("AutoCompleteChoices");choices.setStyleName("list");}public void setFournisseurDeDonnees(FournisseurListe fournisseurDeDonnees) {this.fournisseurDeDonnees=fournisseurDeDonnees;}private void doFetchData(String match) {String rematch=match.replaceAll(" ","/");rematch=rematch.replaceAll("%","");if (this.fournisseurDeDonnees!=null && searching==false) {searching=true;fournisseurDeDonnees.obtenirListeDonnees(rafraichissable, rematch);}}public void onKeyDown(Widget arg0, char arg1, int arg2) {if(arg1 == KEY_ENTER){enterKey(arg0, arg1, arg2);}else if(arg1 == KEY_DOWN){downKey(arg0, arg1, arg2);}else if(arg1 == KEY_UP){upKey(arg0, arg1, arg2);}else if(arg1 == KEY_ESCAPE){escapeKey(arg0, arg1, arg2);}}/*** Not used at all (probleme avec ie, qui ne comprend pas les touches meta)*/public void onKeyPress(Widget arg0, char arg1, int arg2) {}// The down key was pressed.protected void downKey(Widget arg0, char arg1, int arg2) {int selectedIndex = choices.getSelectedIndex();selectedIndex++;if (selectedIndex >= choices.getItemCount()){selectedIndex = 0;}choices.setSelectedIndex(selectedIndex);}// The up key was pressed.protected void upKey(Widget arg0, char arg1, int arg2) {int selectedIndex = choices.getSelectedIndex();selectedIndex--;if(selectedIndex < 0){selectedIndex = choices.getItemCount() - 1;}choices.setSelectedIndex(selectedIndex);}// The enter key was pressed.protected void enterKey(Widget arg0, char arg1, int arg2) {if(visible){complete();}else {// Validation de l'entree : appel asynchrone/* if (autoCompleteAsyncTextBoxListeners!= null) {autoCompleteAsyncTextBoxListeners.fireTextBoxEnter(this,this.getText(),currentValue);}*/currentValue=null;this.setText("");this.setValue(null);}}//The escape key was pressed.protected void escapeKey(Widget arg0, char arg1, int arg2) {choices.clear();items.clear();choicesPopup.hide();visible = false;}// Any other non-special key was pressed.protected void otherKey(Widget arg0, char arg1, int arg2) {// Lancement appelString text = this.getText();if(text.length() > 0){currentValue=null;items.clear();if (getFromCache(text)!=null) {items=getFromCache(text);displayList();}else {this.doFetchData(text);}}}public void onKeyUp(Widget arg0, char arg1, int arg2) {switch(arg1) {case KEY_ALT:case KEY_CTRL:case KEY_DOWN:case KEY_END:case KEY_ENTER:case KEY_ESCAPE:case KEY_HOME:case KEY_LEFT:case KEY_PAGEDOWN:case KEY_PAGEUP:case KEY_RIGHT:case KEY_SHIFT:case KEY_TAB:case KEY_UP:break;default:otherKey(arg0, arg1, arg2);break;}}// Display assistantpublic void displayList() {searching=false;if(this.items.size() > 0){addToCache(this.getText(),(Vector) items.clone());choices.clear();for(int i = 0; i < items.size(); i++){choices.addItem(((String [])items.get(i))[0],((String [])items.get(i))[1]);}// if there is only one match and it is what is in the// text field anyways there is no need to show autocompletion// if(items.size() == 1 && (((String []) items.get(0))[0]).compareTo(this.getText()) == 0)// {// choicesPopup.hide();// } else {choices.setSelectedIndex(0);choices.setVisibleItemCount(items.size());visible = true;choicesPopup.setPopupPosition(this.getAbsoluteLeft(), this.getAbsoluteTop() + this.getOffsetHeight());choicesPopup.setPopupPosition(this.getAbsoluteLeft(), this.getAbsoluteTop() + this.getOffsetHeight());choicesPopup.setWidth(this.getOffsetWidth() + "px");choices.setWidth(this.getOffsetWidth() + "px");choicesPopup.show();// }} else {visible = false;choicesPopup.hide();}}/*** A mouseclick in the list of items*/public void onChange(Widget arg0) {complete();}public void onClick(Widget arg0) {complete();}// add selected item to textboxprotected void complete(){if(choices.getItemCount() > 0){this.setText(choices.getItemText(choices.getSelectedIndex()));currentValue=choices.getValue(choices.getSelectedIndex());/* if (autoCompleteAsyncTextBoxListeners!= null) {autoCompleteAsyncTextBoxListeners.fireTextBoxComplete(responseTextHandler,this.getText(),currentValue);}*/}visible=false;items.clear();choices.clear();choicesPopup.hide();}public void addItem(String item, String value) {items.add(new String [] {item, value});}private void addToCache (String query, Vector result){cache.put(query.toLowerCase(),result);}private Vector getFromCache (String query){return (Vector) cache.get(query.toLowerCase());}public String getValue() {return currentValue;}public void setValue(String value) {this.currentValue=value;}}