ValidatingFormComponentAjaxBehavior.java

/*
 * This program 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 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package net.rrm.ehour.ui.common.component;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.attributes.AjaxRequestAttributes;
import org.apache.wicket.ajax.attributes.ThrottlingSettings;
import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior;
import org.apache.wicket.feedback.IFeedback;
import org.apache.wicket.util.time.Duration;
import org.apache.wicket.util.visit.IVisit;
import org.apache.wicket.util.visit.IVisitor;

/**
 * Validate formcomponent without submitting the form
 */

public class ValidatingFormComponentAjaxBehavior extends AjaxFormComponentUpdatingBehavior {
    private static final long serialVersionUID = 5521068510893118073L;

    public ValidatingFormComponentAjaxBehavior() {
        super("onchange");
    }

    @Override
    protected void updateAjaxAttributes(AjaxRequestAttributes attributes) {
        super.updateAjaxAttributes(attributes);

        attributes.setThrottlingSettings(new ThrottlingSettings("1", Duration.ONE_SECOND, true));
    }

    @Override
    protected void onError(final AjaxRequestTarget target, RuntimeException e) {
        super.onError(target, e);
        addFeedbackPanels(target);

    }

    @Override
    protected void onUpdate(final AjaxRequestTarget target) {
        addFeedbackPanels(target);
    }

    private void addFeedbackPanels(final AjaxRequestTarget target) {
        getComponent().getPage().visitChildren(IFeedback.class, new IVisitor<Component, Void>() {
            @Override
            public void component(Component component, IVisit visit) {
                if (component instanceof AjaxFormComponentFeedbackIndicator) {
                    if (((AjaxFormComponentFeedbackIndicator) component).isIndicatingFor(getFormComponent())) {
                        target.add(component);
                    }
                } else {
                    target.add(component);
                }
            }
        });
    }
}