CategoryItem.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.dossier.dossier;
 
import java.util.ArrayList;
import java.util.Collection;
import org.turro.dossier.db.DossierPU;
import org.turro.dossier.entity.Category;
import org.turro.elephant.context.Application;
import org.turro.elephant.db.WhereClause;
import org.turro.i18n.I_;
import org.turro.jpa.Dao;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zk.ui.ext.AfterCompose;
import org.zkoss.zul.Treechildren;
import org.zkoss.zul.Treeitem;
 
public class CategoryItem extends Treeitem implements AfterCompose {
 
  private Treechildren children;
  private boolean loadOnDemand;
 
  public CategoryItem(Category category, boolean loadOnDemand) {
    super();
    this.loadOnDemand = loadOnDemand;
    setValue(category);
    setLabel(category == null ? I_.get("All") : category.getDescription());
    setTooltiptext(getLabel());
  }
 
  @Override
  public CategoryTree getTree() {
    return (CategoryTree) super.getTree();
  }
 
  public Category getCategory() {
    return (Category) getValue();
  }
 
  public void showContents() {
    fillCategory();
    setOpen(true);
  }
 
  public void reloadContents() {
    if(children != null) {
      children.getChildren().clear();
      showContents();
    }
  }
 
  public boolean isLeaf() {
    return getCategoryChildren().isEmpty();
  }
 
  private void initLoadOnDemand() {
    if(!loadOnDemand) return;
 
    setOpen(false);
 
    addEventListener(Events.ON_OPEN, new EventListener() {
      @Override
      public void onEvent(Event event) throws Exception {
        // load files and add folders
        if(isOpen()) {
          fillCategory();
        }
      }
    });
  }
 
  public CategoryItem addCategory(Category category, boolean loadOnDemand) {
    CategoryItem cat = new CategoryItem(category, loadOnDemand);
    children.appendChild(cat);
    cat.afterCompose();
    return cat;
  }
 
  private void fillCategory() {
    if(children != null && children.getChildren().isEmpty()) {
      for(Category cat : getCategoryChildren()) {
        addCategory(cat, loadOnDemand);
      }
    }
  }
 
  private void addChildrenSpace() {
    if(!isLeaf()) {
      children = new Treechildren();
      appendChild(children);
      if(!loadOnDemand) {
        fillCategory();
        setOpen(true);
      }
    }
  }
 
  public boolean isLoadOnDemand() {
    return loadOnDemand;
  }
 
  public void setLoadOnDemand(boolean loadOnDemand) {
    this.loadOnDemand = loadOnDemand;
  }
 
  public Collection<Category> getCategoryChildren() {
    boolean all = Application.getApplication().isInRole("dossier:all");
    Dao dao = new DossierPU();
    WhereClause wc = new WhereClause();
    wc.addClause("select category from Category as category");
    if(getCategory() == null) {
      wc.addClause("where parent is null");
    } else {
      wc.addClause("where parent = :category");
      wc.addNamedValue("category", getCategory());
    }
              
    wc.addClause("order by category.description");
    ArrayList<Category> list = new ArrayList<Category>();
    for(Object o : dao.getResultList(wc)) {
      if(all || new CategoryWrapper((Category) (o)).isChildrenParticipant()) {
        list.add((Category) o);
      }
    }
    return list;
  }
 
  @Override
  public void afterCompose() {
    initLoadOnDemand();
    addChildrenSpace();
  }
 
}