com.alkacon.vie.client.widgets.HalloWidget.java Source code

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Here is the source code for com.alkacon.vie.client.widgets.HalloWidget.java

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/*
 * File   : $Source$
 * Date   : $Date$
 * Version: $Revision$
 *
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (C) 2002 - 2009 Alkacon Software (http://www.alkacon.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * For further information about Alkacon Software, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.alkacon.vie.client.widgets;

import com.alkacon.vie.client.Entity;
import com.alkacon.vie.client.I_EntityArrayCallback;
import com.alkacon.vie.client.I_EntityCallback;
import com.alkacon.vie.client.Vie;
import com.alkacon.vie.shared.I_Entity;

import com.google.gwt.core.client.JsArray;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;

/**
 * Implements an easy version of editable widget.<p>
 */
public final class HalloWidget {

    /**
     * Hide.<p>
     */
    private HalloWidget() {

        // noop
    }

    /**
     * Makes it editable.<p>
     */
    public static void makeEditable() {

        init();

        final Vie vie = Vie.getInstance();
        vie.useRdfaService();
        vie.bindFunctionToEntities("add", new I_EntityCallback() {

            public void execute(Entity entity) {

                editable(entity, vie);
                entity.addValueChangeHandler(new ValueChangeHandler<Entity>() {

                    public void onValueChange(ValueChangeEvent<Entity> event) {

                        save(event.getValue(), vie);
                    }
                });
            }
        });

        vie.load("rdfa", "body [about]", new I_EntityArrayCallback() {

            public void execute(JsArray<Entity> entities) {

                // noop
            }
        });
    }

    /**
     * Makes the entity editable.<p>
     * 
     * @param entity the entity to make editable
     * @param v the vie instance
     */
    protected static native void editable(I_Entity entity, Vie v) /*-{
                                                                      
                                                                  $wnd
                                                                  .jQuery('[about="' + entity.getSubjectUri() + '"] [property]')
                                                                  .each(
                                                                  function() {
                                                                  if (v.services.rdfa.getElementSubject(this) !== entity.id) {
                                                                  return;
                                                                  }
                                                                  var editableElement = $wnd.jQuery(this);
                                                                  var property = v.services.rdfa
                                                                  .getElementPredicate(this);
                                                                  // Note: you'll also want to configure Hallo to include some plugins
                                                                  editableElement.hallo({
                                                                  plugins : {
                                                                  'halloformat' : {},
                                                                  'halloheadings' : {}
                                                                  },
                                                                  editable : true
                                                                  });
                                                                      
                                                                  editableElement.hallo();
                                                                  editableElement.bind('hallomodified', function(
                                                                  event, data) {
                                                                  var content = data.content;
                                                                  if (content !== entity.get(property)) {
                                                                  var changedProps = {};
                                                                  changedProps[property] = content;
                                                                  entity.set(changedProps);
                                                                  }
                                                                  });
                                                                  })
                                                                  }-*/;

    /**
     * Initialize.<p>
     */
    protected static native void init() /*-{
                                        $wnd.changedEntities = [];
                                        $wnd.saveButton = null;
                                        }-*/;

    /**
     * Makes the entity saveable.<p>
     * 
     * @param entity the entity to make saveable
     * @param v the vie instance
     */
    protected static native void save(I_Entity entity, Vie v) /*-{
                                                                  
                                                              $wnd.console.log(entity.previousAttributes(), entity.attributes);
                                                              if ($wnd.changedEntities.indexOf(entity) === -1) {
                                                              $wnd.changedEntities.push(entity);
                                                              }
                                                              if ($wnd.saveButton) {
                                                              return;
                                                              }
                                                                  
                                                              $wnd.saveButton = $wnd.jQuery('<button>Save</button>');
                                                              $wnd.saveButton.click(function() {
                                                              alert('We would save ' + $wnd.changedEntities.length
                                                              + ' changed entities');
                                                              $wnd._.each($wnd.changedEntities, function(entity) {
                                                              //entity.save();
                                                              });
                                                              $wnd.changedEntities = [];
                                                              });
                                                              $wnd.jQuery('body').append($wnd.saveButton);
                                                              }-*/;

}