/*
* 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.repeater;
import java.util.Iterator;
import org.apache.wicket.extensions.markup.html.repeater.util.SortParam;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.SubmitLink;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.link.Link;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.markup.repeater.OddEvenItem;
import org.apache.wicket.markup.repeater.RefreshingView;
import org.apache.wicket.markup.repeater.ReuseIfModelsEqualStrategy;
import org.apache.wicket.markup.repeater.util.ModelIteratorAdapter;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.model.IModel;
/**
* Page that demonstrates using RefreshingView in a form. The component reuses its items, to allow
* adding or removing rows without necessarily validating the form, and preserving component state
* which preserves error messages, etc.
*/
public class FormPage extends BasePage
{
final Form<?> form;
/**
* constructor
*/
public FormPage()
{
form = new Form("form");
add(form);
// create a repeater that will display the list of contacts.
RefreshingView<Contact> refreshingView = new RefreshingView<Contact>("simple")
{
@Override
protected Iterator<IModel<Contact>> getItemModels()
{
// for simplicity we only show the first 10 contacts
SortParam<String> sort = new SortParam<>("firstName", true);
Iterator<Contact> contacts = DatabaseLocator.getDatabase()
.find(0, 10, sort)
.iterator();
// the iterator returns contact objects, but we need it to
// return models, we use this handy adapter class to perform
// on-the-fly conversion.
return new ModelIteratorAdapter<Contact>(contacts)
{
@Override
protected IModel<Contact> model(Contact object)
{
return new CompoundPropertyModel<Contact>(
new DetachableContactModel(object));
}
};
}
@Override
protected void populateItem(final Item<Contact> item)
{
// populate the row of the repeater
IModel<Contact> contact = item.getModel();
item.add(new ActionPanel("actions", contact));
item.add(new TextField<>("id"));
item.add(new TextField<>("firstName"));
item.add(new TextField<>("lastName"));
item.add(new TextField<>("homePhone"));
item.add(new TextField<>("cellPhone"));
}
@Override
protected Item<Contact> newItem(String id, int index, IModel<Contact> model)
{
// this item sets markup class attribute to either 'odd' or
// 'even' for decoration
return new OddEvenItem<>(id, index, model);
}
};
// because we are in a form we need to preserve state of the component
// hierarchy (because it might contain things like form errors that
// would be lost if the hierarchy for each item was recreated every
// request by default), so we use an item reuse strategy.
refreshingView.setItemReuseStrategy(ReuseIfModelsEqualStrategy.getInstance());
form.add(refreshingView);
}
/**
* Panel that houses row-actions
*/
private class ActionPanel extends Panel
{
/**
* @param id
* component id
* @param model
* model for contact
*/
public ActionPanel(String id, IModel<Contact> model)
{
super(id, model);
add(new Link("select")
{
@Override
public void onClick()
{
setSelected((Contact)ActionPanel.this.getDefaultModelObject());
}
});
SubmitLink removeLink = new SubmitLink("remove", form)
{
@Override
public void onSubmit()
{
Contact contact = (Contact)ActionPanel.this.getDefaultModelObject();
info("Removed contact " + contact);
DatabaseLocator.getDatabase().delete(contact);
}
};
removeLink.setDefaultFormProcessing(false);
add(removeLink);
}
}
}