rich:tree 来创建动态树问题总结一

  做了七天的动态树，虽然还没有做完但先把一些比较重要的东西记下来。

  目前实现了点击节点动态加载树的功能，但点击左侧的箭头相应的事件还没有找到，还是希望有经验的朋友可以指点一二。

  <h:panelGrid columns="2" width="100%" columnClasses="col1,col2">
  <rich:tree style="width:300px" nodeSelectListener="#{tree1bean.nodeload}" toggleOnClick="true"  switchType="ajax" value="#{tree1bean.treeNode}">
  </rich:tree>
  </h:panelGrid>

 

以上的toggleOnClick实现了点击节点时展开、关闭树节点。

         switchType="ajax"实现了局部刷新，只是树加载的部分刷新，但不重载整个页面。

 

package org.jboss.test.main;

import java.util.List;

import javax.ejb.Remove;
import javax.faces.event.AbortProcessingException;
import javax.persistence.EntityManager;

import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.richfaces.component.UITree;
import org.richfaces.event.NodeExpandedEvent;
import org.richfaces.event.NodeSelectedEvent;
import org.richfaces.model.TreeNode;
import org.richfaces.model.TreeNodeImpl;

@Scope(ScopeType.SESSION)
@Name("tree1bean")
public class Tree1Bean{
 private Tree tree;
 private TreeNode treenode = null;
 private List<Tree> onloadtree;
 private List<Tree> onloadtree1;
 private String selectnodesql = "from Tree t where t.parentid = ? order by t.id";
 private int linkid;
 private int flg;
 private int parentid;

 @In("entityManager")
 private EntityManager em; 

 private void firstNode(int id,TreeNode node){
        onloadtree = em.createQuery(selectnodesql).setParameter(1, id).getResultList();
        for (int i=0;i<onloadtree.size();i++){
         TreeNodeImpl nodeImpl = new TreeNodeImpl();
         nodeImpl.setData(onloadtree.get(i).getName());
         node.addChild(new Integer(onloadtree.get(i).getId()), nodeImpl);
         secondeNode(onloadtree.get(i).getId(),nodeImpl);
       }
 }
 
    private void secondeNode(int id,TreeNode node){
        onloadtree1 = em.createQuery(selectnodesql).setParameter(1, id).getResultList();
        for (int i=0;i<onloadtree1.size();i++){
         TreeNodeImpl nodeImpl = new TreeNodeImpl();
         nodeImpl.setData(onloadtree1.get(i).getName());
         node.addChild(new Integer(onloadtree1.get(i).getId()), nodeImpl);
       }
    }
 
 public TreeNode getTreeNode(){
  if (treenode == null){
   treenode = new TreeNodeImpl();
   parentid = 0;
   firstNode(parentid,treenode);
  }
  return treenode;
 }
 
 public void nodeload(NodeSelectedEvent event){
  UITree tree = (UITree) event.getComponent();
  String  sss [] = tree.getRowKey().toString().split(":");
  linkid = Integer.parseInt(sss[sss.length-1]);
  System.out.println("linkid="+linkid);
  tree.clearTreeNodeState();
  firstNode(linkid,tree.getModelTreeNode());
 }

 public int getLinkid() {
  return linkid;
 }
 
 public void setLinkid1(int linkid) {
  this.linkid = linkid;
 }
  
 @Remove
 public void destroy() {
  // TODO Auto-generated method stub
  
 }
}

以上的tree.clearTreeNodeState();实现了收缩节点以后其以后的节点都收缩了回去。回到了初始状态