com.tonbeller.wcf.tree.TreeHandler.java Source code

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Here is the source code for com.tonbeller.wcf.tree.TreeHandler.java

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/*
 * ====================================================================
 * This software is subject to the terms of the Common Public License
 * Agreement, available at the following URL:
 *   http://www.opensource.org/licenses/cpl.html .
 * Copyright (C) 2003-2004 TONBELLER AG.
 * All Rights Reserved.
 * You must accept the terms of that agreement to use this software.
 * ====================================================================
 *
 * 
 */
package com.tonbeller.wcf.tree;

import javax.servlet.http.HttpSession;

import org.apache.commons.beanutils.PropertyUtils;
import org.w3c.dom.Element;

import com.tonbeller.wcf.controller.RequestContext;
import com.tonbeller.wcf.form.FormComponent;
import com.tonbeller.wcf.form.NodeHandlerSupport;
import com.tonbeller.wcf.form.XmlComponent;
import com.tonbeller.wcf.selection.DefaultSelectionModel;
import com.tonbeller.wcf.selection.SelectionChangeListener;
import com.tonbeller.wcf.selection.SelectionModel;
import com.tonbeller.wcf.ui.XoplonCtrl;
import com.tonbeller.wcf.utils.DomUtils;

/**
 * Manages a TreeComponent inside a FormComponent
 * @author av
 */
public class TreeHandler extends NodeHandlerSupport {

    TreeComponent tree;
    FormComponent formComp;

    public void initialize(RequestContext context, XmlComponent xmlComp, Element element) throws Exception {
        super.initialize(context, xmlComp, element);

        // must access the bean, so it has to be a FormComponent
        formComp = (FormComponent) xmlComp;

        String ref = XoplonCtrl.getModelReference(element);
        Object bean = formComp.getBean();
        TreeModel tm = (TreeModel) PropertyUtils.getProperty(bean, ref);
        tree = new TreeComponent(element.getAttribute("id"), formComp, tm);

        DefaultSelectionModel dsm = new DefaultSelectionModel();
        String selmode = element.getAttribute("selmode");
        if ("href".equals(selmode))
            dsm.setMode(SelectionModel.SINGLE_SELECTION_HREF);
        else if ("single".equals(selmode))
            dsm.setMode(SelectionModel.SINGLE_SELECTION);
        else if ("multi".equals(selmode))
            dsm.setMode(SelectionModel.MULTIPLE_SELECTION);
        else if ("button".equals(selmode))
            dsm.setMode(SelectionModel.MULTIPLE_SELECTION_BUTTON);
        else
            dsm.setMode(SelectionModel.NO_SELECTION);
        tree.setSelectionModel(dsm);
        if (tm instanceof SelectionChangeListener)
            dsm.addSelectionListener((SelectionChangeListener) tm);

        // override border by setting an attribute
        String border = element.getAttribute("border");
        if (border.length() > 0)
            tree.setBorder(border);

        // override width by setting an attribute
        String width = element.getAttribute("width");
        if (width.length() > 0)
            tree.setWidth(width);

        // override renderId Attribute always
        tree.setRenderId(element.getAttribute("id"));

        // click in tree should validate the user input in form fields
        tree.addFormListener(formComp);
        formComp.addFormListener(tree);

        tree.initialize(context);
    }

    public void destroy(HttpSession session) throws Exception {
        tree.destroy(session);
        super.destroy(session);
    }

    public void render(RequestContext context) throws Exception {
        super.render(context);
        Element parent = getElement();
        DomUtils.removeChildElements(parent);
        Element child = tree.render(context, parent.getOwnerDocument());
        parent.appendChild(child);
    }

    /**
     * @return
     */
    public FormComponent getFormComp() {
        return formComp;
    }

    /**
     * @return
     */
    public TreeComponent getTree() {
        return tree;
    }
}