/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.wicket.examples.compref;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.wicket.examples.WicketExamplePage;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.ListMultipleChoice;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.util.io.IClusterable;
import org.apache.wicket.util.string.Strings;
/**
* Page with examples on {@link org.apache.wicket.markup.html.form.ListMultipleChoice}.
*
* @author Eelco Hillenius
*/
public class ListMultipleChoicePage extends WicketExamplePage
{
/** available sites for selection. */
private static final List<String> SITES = Arrays.asList("The Server Side", "Java Lobby", "Java.Net");
/** available choices for large selection box. */
private static final List<String> MANY_CHOICES = Arrays.asList(
"Choice1", "Choice2", "Choice3", "Choice4", "Choice5", "Choice6", "Choice7", "Choice8", "Choice9");
/**
* Constructor
*/
public ListMultipleChoicePage()
{
final Input input = new Input();
setDefaultModel(new CompoundPropertyModel<>(input));
// Add a FeedbackPanel for displaying our messages
FeedbackPanel feedbackPanel = new FeedbackPanel("feedback");
add(feedbackPanel);
// Add a form with an onSubmit implementation that sets a message
Form<Void> form = new Form<Void>("form")
{
@Override
protected void onSubmit()
{
info("input: " + input);
}
};
add(form);
// Add a multiple list choice component that uses the model object's
// 'site'
// property to designate the current selection, and that uses the SITES
// list for the available options.
// Note that our model here holds a Collection, as we need to store
// multiple values too
ListMultipleChoice<String> listChoice = new ListMultipleChoice<>("sites", SITES);
form.add(listChoice);
listChoice = new ListMultipleChoice<String>("choices", MANY_CHOICES)
{
@Override
protected boolean isDisabled(String object, int index, String selected)
{
if (index == 1)
return true;
return super.isDisabled(object, index, selected);
}
};
listChoice.setMaxRows(5);
form.add(listChoice);
}
/** Simple data class that acts as a model for the input fields. */
private static class Input implements IClusterable
{
/** the selected sites. */
public List<String> sites = new ArrayList<>();
/** the selected choices. */
public List<String> choices = new ArrayList<>();
/** adds pre-selected items to the choices list */
public Input()
{
choices.add("Choice3");
choices.add("Choice4");
choices.add("Choice5");
}
@Override
public String toString()
{
return "sites = '" + listAsString(sites) + "', choices='" + listAsString(choices) + "'";
}
private String listAsString(List<String> list)
{
return Strings.join(", ", list);
}
}
/**
* Override base method to provide an explanation
*/
@Override
protected void explain()
{
String html = "<select wicket:id=\"sites\">\n" + " <option>site 1</option>\n"
+ " <option>site 2</option>\n" + "</select>\n" + "<select wicket:id=\"choices\">\n"
+ " <option>choice 1</option>\n" + " <option>choice 2</option>\n" + "</select>";
String code = " // Add a multiple list choice component that uses the model object's 'site'\n"
+ " // property to designate the current selection, and that uses the SITES\n"
+ " // list for the available options.\n"
+ " // Note that our model here holds a Collection, as we need to store\n"
+ " // multiple values too\n"
+ " ListMultipleChoice siteChoice = new ListMultipleChoice(\"sites\", SITES);\n"
+ " form.add(siteChoice);\n"
+ "\n"
+ " ListMultipleChoice manyChoice = new ListMultipleChoice(\"choices\", MANY_CHOICES).setMaxRows(5);\n"
+ " form.add(manyChoice);";
add(new ExplainPanel(html, code));
}
}