3 Replies Latest reply on Mar 20, 2009 6:13 AM by Nick Belaevski

    tree, expandAll, collapseAll issue

    Smitha Ramaswamy Newbie

      I have a tree with many nodes and it works perfectly fine.

      Now since there are many nodes I have implemented expand all and collapse all feature using queueExpandAll(), queueCollapseAll().

      I have two buttons expandAll, collapseAll to do this.

      Here is the code:

      
      @Scope(ScopeType.SESSION)
      @Name("configTreeComponentState")
      public class ConfigTreeComponentState {
      
       private static Logger logger = Logger
       .getLogger(ConfigTreeComponentState.class);
      
       UITree configUITree;
      
       public final UITree getConfigUITree() {
       return configUITree;
       }
      
       public final void setConfigUITree(final UITree configUITree) {
       this.configUITree = configUITree;
       }
      
       public void expandAll() {
       try {
       this.configUITree.queueExpandAll();
       } catch (final Exception ex) {
       ex.printStackTrace();
       if (logger.isDebugEnabled()) {
       logger.debug("IOException in Expand all Tree");
       }
       }
       }
      
       public void collapseAll() {
       try {
       configUITree.queueCollapseAll();
       } catch (final Exception ex) {
       ex.printStackTrace();
       if (logger.isDebugEnabled()) {
       logger.debug("IOException in Collapse all Tree");
       }
       }
       }
      }
      
      
      <rich:panel id="configtree" bodyClass="leftmenu_body_config">
      
       <h:form>
       <div class="actionButtons" style="padding-bottom:10px">
       <h:commandButton id="expand"
       styleClass="button"
       value="Expand"
       action="#{configTreeComponentState.expandAll}"/>
      
      
       <h:commandButton id="close"
       styleClass="button"
       value="Collapse"
       action="#{configTreeComponentState.collapseAll}" />
       </div>
      
      
       <rich:tree switchType="ajax" stateAdvisor="#{treeStateAdvisor}" binding="#{configTreeComponentState.configUITree}">
       <rich:recursiveTreeNodesAdaptor id="config" roots="#{configurationManager.rootNodes}"
       var="config"
       nodes="#{config.childrenNodes}" >
       <--- more code ---->
      
       </rich:recursiveTreeNodesAdaptor>
       </rich:tree>
      
       </h:form>
      
      </rich:panel>
      
      
      


      What I notice is intially when the tree is loaded it sets the UITree in ConfigTreeComponentState and later when expandAll() is called the configUITree is null. Hence it throws a null pointer exception.
      I was expecting to have the tree instance. How can I achieve the expandall, collapsall functionality.