au.org.theark.core.web.behavior.ArkRequiredFieldHintBehavior.java Source code

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Here is the source code for au.org.theark.core.web.behavior.ArkRequiredFieldHintBehavior.java

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/*******************************************************************************
 * Copyright (c) 2011  University of Western Australia. All rights reserved.
 * 
 * This file is part of The Ark.
 * 
 * The Ark is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 * 
 * The Ark 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package au.org.theark.core.web.behavior;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.html.form.FormComponent;

public class ArkRequiredFieldHintBehavior extends Behavior {

    private static final long serialVersionUID = 2695428312191631705L;

    public void afterRender(Component component) {
        try {
            FormComponent<?> fc = (FormComponent<?>) component;
            if (fc.isRequired()) {

                // Append the span and img icon right after the rendering of the
                // component. Not as pretty as working with a panel etc, but works
                // for behaviors and is more efficient
                org.apache.wicket.request.Response response = component.getResponse();
                response.write("<span class=\"requiredHint\">*</span>");
            }
        } catch (ClassCastException cce) {
            // ignore non FormComponent Objects
        }
    }

}