/**
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.guvnor.client.modeldriven.ui;
import org.drools.guvnor.client.common.DropDownValueChanged;
import org.drools.guvnor.client.common.GenericCallback;
import org.drools.guvnor.client.common.IDirtyable;
import org.drools.guvnor.client.common.LoadingPopup;
import org.drools.guvnor.client.messages.Constants;
import org.drools.guvnor.client.rpc.RepositoryServiceFactory;
import org.drools.ide.common.client.modeldriven.DropDownData;
import org.drools.ide.common.client.modeldriven.ui.ConstraintValueEditorHelper;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.DeferredCommand;
import com.google.gwt.user.client.ui.ListBox;
/**
* A drop down for enumerated values
*
* @author Toni Rikkola
*
*/
public class EnumDropDown extends ListBox
implements
IDirtyable {
private DropDownValueChanged valueChanged;
public EnumDropDown(final String currentValue,
final DropDownValueChanged valueChanged,
final DropDownData dropData) {
final Constants cs = GWT.create( Constants.class );
this.valueChanged = valueChanged;
addChangeHandler(new ChangeHandler() {
public void onChange(ChangeEvent event) {
valueChanged.valueChanged(getItemText(getSelectedIndex()),
getValue(getSelectedIndex()));
}
});
//if we have to do it lazy, we will hit up the server when the widget gets focus
if ( dropData.fixedList == null && dropData.queryExpression != null ) {
DeferredCommand.addCommand( new Command() {
public void execute() {
LoadingPopup.showMessage( cs.RefreshingList() );
RepositoryServiceFactory.getService().loadDropDownExpression( dropData.valuePairs,
dropData.queryExpression,
new GenericCallback() {
public void onSuccess(Object data) {
LoadingPopup.close();
String[] list = (String[]) data;
if ( list.length == 0 ) {
list = new String[]{cs.UnableToLoadList()};
}
fillDropDown( currentValue,
list );
}
public void onFailure(Throwable t) {
LoadingPopup.close();
//just do an empty drop down...
fillDropDown( currentValue,
new String[]{cs.UnableToLoadList()} );
}
} );
}
} );
} else {
//otherwise its just a normal one...
fillDropDown( currentValue,
dropData.fixedList );
}
if ( currentValue == null || "".equals( currentValue ) ) {
int ix = getSelectedIndex();
if ( ix > -1 ) {
valueChanged.valueChanged( getItemText( ix ),
getValue( ix ) );
}
}
}
private void fillDropDown(final String currentValue,
final String[] enumeratedValues) {
boolean selected = false;
clear();
for ( int i = 0; i < enumeratedValues.length; i++ ) {
String v = enumeratedValues[i];
String val;
if ( v.indexOf( '=' ) > 0 ) {
//using a mapping
String[] splut = ConstraintValueEditorHelper.splitValue( v );
String realValue = splut[0];
String display = splut[1];
val = realValue;
addItem( display,
realValue );
} else {
addItem( v,
v );
val = v;
}
if ( currentValue != null && currentValue.equals( val ) ) {
setSelectedIndex( i );
selected = true;
valueChanged.valueChanged( getItemText( getSelectedIndex() ),
getValue( getSelectedIndex() ) );
}
}
if ( currentValue != null && !"".equals( currentValue ) && !selected ) {
//need to add this value
addItem( currentValue,
currentValue );
setSelectedIndex( enumeratedValues.length );
}
}
}