Question about using DefaultMutableTreeNode with a java.lang.Object userObject and creating multiple trees dynamically.

[Todd Patrick]

1.) I am trying to populate a tree model, at this point I have:

 

ListIterator trans = transactList.listIterator(transactList.size());
               
while(trans.hasNext()) {
    TransactRow row = (TransactRow) trans.next();
    DefaultMutableTreeNode root = new DefaultMutableTreeNode(row);
}

this.treeModel = new DefaultTreeModel(root);

 

Depending what on the number of TransactRow objects returned from my transactList.listIterator, how do I define a placeholder (???) for any number of t:tree components?

 

 

2.) Also, I see I can pass in a userObject into the constructor for DefaultMutableTreeNode.

 

I'd like to populate the display with the fields from the row (TransactRow) object.

 

Do I need to add one t:treeColumn and a h:column for each field, such as:

 

<t:tree id="tree" value="#{tbrowser.treeModel}"
var="treeItem"
styleClass="tree"
nodeClass="treenode"
headerClass="treeHeader"
footerClass="treeFooter"
rowClasses="a, b"
columnClasses="col1, col2"
selectedNodeClass="treenodeSelected"
expandRoot="true">
<t:treeColumn>
<f:facet name="header">
<h:outputText value="Transaction ID" />
</f:facet>
<h:outputText value="#{treeItem.TRANSACT_ID}" />
</t:treeColumn>
<h:column>
<f:facet name="header">
<h:outputText value="Transaction Type ID" />
</f:facet>
<h:outputText value="#{treeItem.XACTTYPE_ID}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Element ID" />
</f:facet>
<h:outputText value="#{treeItem.ELEMENT_ID}" />
</h:column>
</t:tree>

 

Or can I just do the following and not specify each column?

Would t:tree dynamically build the columns?

 

<t:tree id="tree" value="#{tbrowser.treeModel}"
var="treeItem"
styleClass="tree"
nodeClass="treenode"
headerClass="treeHeader"
footerClass="treeFooter"
rowClasses="a, b"
columnClasses="col1, col2"
selectedNodeClass="treenodeSelected"
expandRoot="true"/>

 

Thanks,

 

--Todd