MultivaluedExpandBehavior.java

package fr.openwide.core.wicket.more.markup.html.template.js.jquery.plugins.multivaluedexpand;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.markup.head.OnDomReadyHeaderItem;
import org.wicketstuff.wiquery.core.javascript.JsStatement;

/**
 * Add an iconic button "+/-" to expand/skrink a ".multivalued" component
 * if it contains more than one ".multivalued-item".
 * The ".multivalued" component is typically a cell in a table, but it could be a simple div.
 * 
 * This plugin needs to add styles on the following components to display multivalued items and toggle button.
 * <ul>
 * 	<li>.multivalued</li>
 * 	<li>.multivalued .multivalued-item</li>
 * 	<li>.multivalued a.expand-toggle</li>
 * 	<li>.multivalued.closed</li>
 * </ul>
 */
public class MultivaluedExpandBehavior extends Behavior {
	
	private static final long serialVersionUID = -4702519833307463534L;
	
	private final MultivaluedExpand multivaluedExpand;
	
	public MultivaluedExpandBehavior() {
		this(new MultivaluedExpand());
	}
	
	public MultivaluedExpandBehavior(MultivaluedExpand multivaluedExpand) {
		super();
		this.multivaluedExpand = multivaluedExpand;
	}
	
	@Override
	public void renderHead(Component component, IHeaderResponse response) {
		response.render(JavaScriptHeaderItem.forReference(MultivaluedExpandResourceReference.get()));
		response.render(OnDomReadyHeaderItem.forScript(statement(component).render()));
	}
	
	protected JsStatement statement(Component component) {
		return new JsStatement().$(component).chain(multivaluedExpand);
	}

}