/*
* Copyright 2011 CAST, Inc.
*
* This file is part of the UDL Curriculum Toolkit:
* see <http://code.google.com/p/udl-curriculum-toolkit>.
*
* The UDL Curriculum Toolkit is free software: you can redistribute and/or
* modify it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* The UDL Curriculum Toolkit 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this software. If not, see <http://www.gnu.org/licenses/>.
*/
package org.cast.isi.component;
import lombok.Getter;
import lombok.Setter;
import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxEventBehavior;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.form.FormComponentLabel;
import org.apache.wicket.markup.html.form.Radio;
import org.apache.wicket.markup.html.form.RadioGroup;
import org.apache.wicket.model.IModel;
/**
* A simple radio button. It can be told whether it is the correct
* answer.
*
* Not so simple anymore. It also notifies listeners of a change event.
*
* @author jbrookover
*/
public class SingleSelectItem extends WebMarkupContainer {
private static final long serialVersionUID = 1L;
@Getter @Setter private boolean correct = false;
public SingleSelectItem(String id, IModel<String> model) {
this(id, model, false);
}
public SingleSelectItem(String id, IModel<String> model, boolean correct) {
super(id, model);
this.correct = correct;
final Radio<String> radio = new Radio<String>("radio", model);
add(radio);
add(new FormComponentLabel("label", radio));
radio.add(new AjaxEventBehavior("onclick"){
private static final long serialVersionUID = 1L;
@Override
protected void onEvent(AjaxRequestTarget target) {
notifyListeners(target, SingleSelectItem.this);
}
});
}
public void notifyListeners(final AjaxRequestTarget target, final SingleSelectItem source) {
if (target != null) {
getPage().visitChildren(ISingleSelectItemChangeListener.class, new IVisitor<Component>() {
public Object component(Component component) {
ISingleSelectItemChangeListener listener = (ISingleSelectItemChangeListener) component;
listener.onSelectionChanged(target, source);
return CONTINUE_TRAVERSAL;
}
});
}
}
/**
* Is this item currently selected?
* @return true if so
*/
public boolean isSelected() {
@SuppressWarnings("unchecked")
Radio<String> radio = (Radio<String>) get("radio");
return (radio.getDefaultModelObject().equals(findParent(RadioGroup.class).getDefaultModelObject()));
}
@Override
protected void onComponentTag(ComponentTag tag) {
super.onComponentTag(tag);
tag.remove("correct"); // Remove correct attribute designated by XML
}
@SuppressWarnings("unchecked")
public IModel<String> getModel() {
return (IModel<String>) getDefaultModel();
}
}