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How to develop a tree menu using Java Server Faces?

Posted on 2009-04-11
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1,155 Views
Last Modified: 2013-11-24
Could anyone guide me on how to develop a dynamic tree menu using Java Server Faces? The requirement is such that: There will be a root menu "Projects". When it is clicked, it should expand with a list of projects and each project should have a sub-menu with the modules related to that project. The nodes "Projects" and "Modules" are static, whereas the content should be dynamically loaded. Diagramatically, it should be as below:

Before Clicking "Projects":
+ Projects
After Clicking "Projects"
- Projects
     + ERP
     + Oracle
     + Java
After Clicking on "ERP"
- Projects
      - ERP
           + Modules
      + Oracle
      + Java

Can it be achieved without using "JavaScript"?
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Question by:visu_nekk
  • 2
4 Comments
 
LVL 15

Expert Comment

by:spprivate
ID: 24122071
I created a page for our project.We have used Apache Myfaces rather than reference implementation.

Attached is the image of my tree
private TreeModel hierarchyTree;
    private HierarchyNode hierarchyRootNode;
    public TreeModel getHierarchyTree()
    {
        if(hierarchyRootNode == null)
  hierarchyRootNode = new HierarchyNode(0, "NONE", "MyRoot", false);
    
        hierarchyTree = new TreeModelBase(hierarchyRootNode); 
        addChildren(hierarchyRootNode);
 
        return hierarchyTree;
    }
 
 
public void setHierarchyTree(org.apache.myfaces.custom.tree2.TreeModel t) { this.hierarchyTree = t; }
 
 
private void addChildren(HierarchyNode currentNode)
    {
       
        for(Iterator i = currentNode.getChildren().iterator(); i.hasNext(); )
        {
            addChildren((HierarchyNode)i.next());//This is a recursive funtion
        }
 
Getting Child Nodes from database
@Override
    public List getChildren()
    {
        loadChildren();
        return children;
    }
 
Loading the Children List
 
 public void loadChildren()
    {
        if(childrenLoaded) return;
 
        Connection connection = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try
        {
                String sql = "select * from Yourtable where PARENT_ID = ? ";
            connection = DB.getConnection();
            ps = connection.prepareStatement(sql);
            int i=1;
            ps.setInt(i++, id);
            ps.setString(i++, type);
            rs = ps.executeQuery();
            while(rs.next())
            {
                int cId = rs.getInt("CHILD_ID");
                String cType = rs.getString("CHILD_TYPE");
                String cName = rs.getString("CHILD_Name");
    HierarchyNode cNode = new HierarchyNode(cId, cType, cName, false);
                addChild(cNode);
            }
            childrenLoaded = true;
        }
        catch(Exception e) { log.error(e,e); }
        finally { DB.close(rs, ps, connection); }
    }
    }
 
 
FINALLY IN YOUR XHTML THIS IS HOW YOU HAVE
<div>Hierarchy:
                                    <t:tree2 value="#{bean.hierarchyTree}" id="hierarchyTree" var="node" showRootNode="false" preserveToggle="false" >//where bean is your bean.Make sure you spell the getter method exactly as in bean(case) 
                                        <f:facet name="hierarchy">
                                            <h:panelGroup>
                                            <t:selectBooleanCheckbox value="#{node.checked}" title="#{node.description}"/>
                                            <h:outputText value="#{node.description}"/>
                                            </h:panelGroup>
                                        </f:facet>
                                    </t:tree2>
                                </div>

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tree.JPG
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Author Comment

by:visu_nekk
ID: 24174271
Is it possible to add a right click menu on the nodes using MyFaces? For example,
When I right click on West, a menu should be displayed with options "Add nodes to West" and "Delete West".Similarly  when I right click on East, a menu should be displayed with options "Add nodes to East" and "Delete East".
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LVL 15

Expert Comment

by:spprivate
ID: 24298415
I havent gone so far in JSF.Sorry
0
 
LVL 1

Accepted Solution

by:
pips06 earned 500 total points
ID: 24533536
I suggest that you try Visual Web JSF framework cause it has some basic components and some advance components just like the tree component you can just drag and drop it to the stage and you can input your data there.
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