org.objetdirect.wickext.core.events.WickextEventBehavior.java Source code

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Here is the source code for org.objetdirect.wickext.core.events.WickextEventBehavior.java

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/*
 * Copyright (c) 2008 Objet Direct
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.objetdirect.wickext.core.events;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.behavior.HeaderContributor;
import org.apache.wicket.markup.html.IHeaderResponse;
import org.objetdirect.wickext.core.commons.CoreJavaScriptHeaderContributor;
import org.objetdirect.wickext.core.javascript.JsQuery;

/**
 * $Id: WickextEventBehavior.java 71 2008-11-17 23:11:34Z lionel.armanet $
 * <p>
 * Calls a JavaScript statement when the given {@link Event} is triggered.
 * </p>
 * 
 * @author Lionel Armanet
 * @since 0.5
 */
public class WickextEventBehavior extends AbstractBehavior {

    private static final long serialVersionUID = -5984090566307323188L;

    /**
     * The trigger event.
     */
    private Event event;

    /**
     * The event is attached to this component.
     */
    private Component component;

    /**
     * Builds a new instance of {@link WickextEventBehavior}.
     * 
     * @param event
     *            the {@link Event} triggering the JavaScript statement.
     */
    public WickextEventBehavior(Event event) {
        super();
        this.event = event;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.wicket.behavior.AbstractBehavior#bind(
     *      org.apache.wicket.Component)
     */
    @Override
    public void bind(Component component) {
        super.bind(component);
        this.component = component;
        component.getPage().add(new HeaderContributor(new CoreJavaScriptHeaderContributor()));
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.wicket.behavior.AbstractBehavior#renderHead(
     *      org.apache.wicket.markup.html.IHeaderResponse)
     */
    @Override
    public void renderHead(IHeaderResponse response) {
        // builds a jQuery statement to fire this event. The JavaScript
        // code to trigger after that is given by #callbackStatement()
        JsQuery query = new JsQuery(component);
        query.$().chain(event);
        query.renderHead(response);
    }

}