org.projectforge.web.wicket.ShinyFormVisitor.java Source code

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Here is the source code for org.projectforge.web.wicket.ShinyFormVisitor.java

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/////////////////////////////////////////////////////////////////////////////
//
// Project ProjectForge Community Edition
//         www.projectforge.org
//
// Copyright (C) 2001-2013 Kai Reinhard (k.reinhard@micromata.de)
//
// ProjectForge is dual-licensed.
//
// This community edition 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; version 3 of the License.
//
// This community edition 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 org.projectforge.web.wicket;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import org.apache.wicket.Component;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.util.visit.IVisit;
import org.apache.wicket.util.visit.IVisitor;
import org.projectforge.web.wicket.flowlayout.FieldsetPanel;

/**
 * Visitor for highlighting form components with validation errors. A border around the error fields with error highlighting and validation
 * message will be shown.
 * @author Kai Reinhard (k.reinhard@micromata.de)
 * 
 */
public class ShinyFormVisitor implements IVisitor<Component, Void>, Serializable {
    private static final long serialVersionUID = -4544543580002871884L;

    Set<Component> visited = new HashSet<Component>();

    /**
     * Clear hash set with all visited components.
     */
    public void reset() {
        visited = new HashSet<Component>();
    }

    @Override
    public void component(final Component component, final IVisit<Void> visit) {
        if (component instanceof FieldsetPanel == true) {
            final FieldsetPanel fsPanel = (FieldsetPanel) component;
            if (fsPanel.isValid() == false) {
                if (visited.contains(component) == false) {
                    visited.add(component);
                    //fsPanel.getFieldset().add(new ValidationMsgBehavior());
                    fsPanel.getFieldset().add(new ErrorHighlightBehavior());
                }
            }
            visit.dontGoDeeper();
            return;
        }
        if (component instanceof FormComponent<?> == false) {
            return;
        }
        final FormComponent<?> fc = (FormComponent<?>) component;
        if (fc.isValid() == false && hasInvalidParent(fc.getParent()) == false) {
            if (visited.contains(component) == false) {
                visited.add(component);
                //component.add(new ValidationMsgBehavior());
                component.add(new ErrorHighlightBehavior());
            }
        }
        // if (fc.isValid() == false && hasInvalidParent(fc.getParent()) == false) {
        // component.setComponentBorder(new ValidationErrorBorder());
        // } else if (component.getComponentBorder() != null) {
        // // Clear component border.
        // component.setComponentBorder(null);
        // }
        visit.dontGoDeeper();
        return;
    }

    /** Avoid borders arround components and child components. */
    private boolean hasInvalidParent(final Component component) {
        if (component == null) {
            return false;
        }
        if (component instanceof FieldsetPanel && ((FieldsetPanel) component).isValid() == false) {
            return true;
        }
        if (component instanceof FormComponent<?> && ((FormComponent<?>) component).isValid() == false) {
            return true;
        }
        return hasInvalidParent(component.getParent());
    }
}