EntityTree.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2021 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.entities;
 
import org.zkoss.zul.Tree;
import org.zkoss.zul.Treechildren;
 
public class EntityTree extends Tree {
 
  private Treechildren children;
  private boolean loadOnDemand = true;
 
  public EntityTree() {
    super();
    addChildrenSpace();
  }
 
  public void setLoadOnDemand(boolean loadOnDemand) {
    this.loadOnDemand = loadOnDemand;
  }
 
  public void setRoot(IElephantEntity category) {
    children.getChildren().clear();
    if(category != null) {
      addCategory(category, loadOnDemand);
    }
  }
 
  public EntityTreeItem addCategory(IElephantEntity category, boolean loadOnDemand) {
    EntityTreeItem cat = new EntityTreeItem(category, loadOnDemand);
    children.appendChild(cat);
    cat.afterCompose();
    return cat;
  }
 
  public IElephantEntity getSelectedCategory() {
    if(getSelectedItem() instanceof EntityTreeItem ) {
      return (IElephantEntity) ((EntityTreeItem) getSelectedItem()).getCategory();
    }
    return null;
  }
 
  private void addChildrenSpace() {
    children = new Treechildren();
    appendChild(children);
  }
 
  public void reloadContents() {
    for(Object o : children.getChildren()) {
      if(o instanceof EntityTreeItem) {
        ((EntityTreeItem) o).reloadContents();
      }
    }
  }
 
}