/*
* Copyright 2012 Igor Vaynberg
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
* the License. You may obtain a copy of the License in the LICENSE file, or 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 com.vaynberg.wicket.select2;
import java.util.Collections;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.OnDomReadyHeaderItem;
import org.apache.wicket.model.IModel;
import org.apache.wicket.util.string.Strings;
import org.json.JSONException;
import com.vaynberg.wicket.select2.json.JsonBuilder;
/**
* Single-select Select2 component. Should be attached to a {@code <input type='hidden'/>} element.
*
* @author igor
*
* @param <T>
* type of choice object
*/
public class Select2Choice<T> extends AbstractSelect2Choice<T, T> {
public Select2Choice(String id, IModel<T> model, ChoiceProvider<T> provider) {
super(id, model, provider);
}
public Select2Choice(String id, IModel<T> model) {
super(id, model);
}
public Select2Choice(String id) {
super(id);
}
@Override
protected void convertInput() {
String input = getWebRequest().getRequestParameters().getParameterValue(getInputName()).toString();
if (Strings.isEmpty(input)) {
setConvertedInput(null);
} else {
setConvertedInput(getProvider().toChoices(Collections.singleton(input)).iterator().next());
}
}
@Override
protected void renderInitializationScript(IHeaderResponse response) {
T value;
if (getWebRequest().getRequestParameters().getParameterNames().contains(getInputName())) {
convertInput();
value = getConvertedInput();
} else {
value = getModelObject();
}
if (value != null) {
JsonBuilder selection = new JsonBuilder();
try {
selection.object();
getProvider().toJson(value, selection);
selection.endObject();
} catch (JSONException e) {
throw new RuntimeException("Error converting model object to Json", e);
}
response.render(OnDomReadyHeaderItem.forScript(JQuery.execute("$('#%s').select2('data', %s);",
getJquerySafeMarkupId(), selection.toJson())));
}
}
}