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/* |
Auto-Completion Textbox for GWT |
Copyright (C) 2006 Oliver Albers http://gwt.components.googlepages.com/ |
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This library is free software; you can redistribute it and/or |
modify it under the terms of the GNU Lesser General Public |
License as published by the Free Software Foundation; either |
version 2.1 of the License, or (at your option) any later version. |
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This library is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
License along with this library; if not, write to the Free Software |
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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package org.tela_botanica.client.vues; |
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// 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 Objects |
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import 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; |
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import java.util.Vector; |
import java.util.HashMap; |
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import org.tela_botanica.client.interfaces.FournisseurListe; |
import org.tela_botanica.client.interfaces.Rafraichissable; |
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public class AutoCompleteAsyncTextBox extends TextBox implements KeyboardListener { |
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// Fournisseur de donnees |
private FournisseurListe fournisseurDeDonnees=null; |
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private HashMap cache = new HashMap(); |
private boolean searching = false; |
private Rafraichissable rafraichissable=null; |
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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; |
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/** |
* Value linked to current text |
*/ |
protected String currentValue = null; |
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/** |
* Default Constructor |
* |
*/ |
public AutoCompleteAsyncTextBox(Rafraichissable r) |
{ |
super(); |
rafraichissable=r; |
this.addKeyboardListener(this); |
choices.sinkEvents(Event.ONCLICK); |
this.setStyleName("AutoCompleteAsyncTextBox"); |
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choicesPopup.add(choices); |
choicesPopup.addStyleName("AutoCompleteChoices"); |
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choices.setStyleName("list"); |
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} |
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public void setFournisseurDeDonnees(FournisseurListe fournisseurDeDonnees) { |
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this.fournisseurDeDonnees=fournisseurDeDonnees; |
} |
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private void doFetchData(String match) { |
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String rematch=match.replaceAll(" ","/"); |
rematch=rematch.replaceAll("%",""); |
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if (this.fournisseurDeDonnees!=null && searching==false) { |
searching=true; |
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fournisseurDeDonnees.obtenirListeDonnees(rafraichissable, rematch); |
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} |
} |
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public void onKeyDown(Widget arg0, char arg1, int arg2) { |
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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); |
} |
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} |
/** |
* Not used at all (probleme avec ie, qui ne comprend pas les touches meta) |
*/ |
public void onKeyPress(Widget arg0, char arg1, int arg2) { |
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} |
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// The down key was pressed. |
protected void downKey(Widget arg0, char arg1, int arg2) { |
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int selectedIndex = choices.getSelectedIndex(); |
selectedIndex++; |
if (selectedIndex >= choices.getItemCount()) |
{ |
selectedIndex = 0; |
} |
choices.setSelectedIndex(selectedIndex); |
} |
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// 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); |
} |
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// 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); |
} |
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} |
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//The escape key was pressed. |
protected void escapeKey(Widget arg0, char arg1, int arg2) { |
choices.clear(); |
items.clear(); |
choicesPopup.hide(); |
visible = false; |
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} |
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// Any other non-special key was pressed. |
protected void otherKey(Widget arg0, char arg1, int arg2) { |
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// Lancement appel |
String text = this.getText(); |
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if(text.length() > 0) |
{ |
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currentValue=null; |
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items.clear(); |
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if (getFromCache(text)!=null) { |
items=getFromCache(text); |
displayList(); |
} |
else { |
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this.doFetchData(text); |
} |
} |
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} |
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public void onKeyUp(Widget arg0, char arg1, int arg2) { |
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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; |
} |
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} |
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// Display assistant |
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public void displayList() { |
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searching=false; |
if(this.items.size() > 0) |
{ |
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addToCache(this.getText(),(Vector) items.clone()); |
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choices.clear(); |
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for(int i = 0; i < items.size(); i++) |
{ |
choices.addItem(((String [])items.get(i))[0],((String [])items.get(i))[1]); |
} |
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// 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()); |
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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"); |
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choicesPopup.show(); |
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// } |
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} else { |
visible = false; |
choicesPopup.hide(); |
} |
} |
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/** |
* A mouseclick in the list of items |
*/ |
public void onChange(Widget arg0) { |
complete(); |
} |
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public void onClick(Widget arg0) { |
complete(); |
} |
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// add selected item to textbox |
protected void complete() |
{ |
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if(choices.getItemCount() > 0) |
{ |
this.setText(choices.getItemText(choices.getSelectedIndex())); |
currentValue=choices.getValue(choices.getSelectedIndex()); |
/* if (autoCompleteAsyncTextBoxListeners!= null) { |
autoCompleteAsyncTextBoxListeners.fireTextBoxComplete(responseTextHandler,this.getText(),currentValue); |
}*/ |
} |
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visible=false; |
items.clear(); |
choices.clear(); |
choicesPopup.hide(); |
} |
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public void addItem(String item, String value) { |
items.add(new String [] {item, value}); |
} |
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private void addToCache (String query, Vector result) |
{ |
cache.put(query.toLowerCase(),result); |
} |
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private Vector getFromCache (String query) |
{ |
return (Vector) cache.get(query.toLowerCase()); |
} |
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public String getValue() { |
return currentValue; |
} |
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public void setValue(String value) { |
this.currentValue=value; |
} |
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} |
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