Hi all, I'm experimenting with the tree2 component, but I'm facing a problem: I
added a checkbox for each node, trying to follow the same method I would use for
a datatable. I then added a commandButton for submitting page data.
The problem is, when the commandButton action is performed on the server side, I
can't extract any node from the tree component.
Here is the code:
The backing bean:
public class MyBean {
private UITreeData tree = null;
private UISelectBoolean checkbox = null;
//Creates the TreeModel to feed the tree
public TreeModel getTreeData() {
TreeNode root = this.addNode(new MyTreeNode("0", "root"), 0);
return new TreeModelBase(root);
}
//Adds some fake nodes to the tree
private TreeNode addNode(MyTreeNode node, int level) {
TreeNodeBase node1 = null;
if(level == 0)
node1 = new TreeNodeBase("root", node.getName(), node.getId(),
false);
else
node1 = new TreeNodeBase("central-node", node.getName(),
node.getId(), false);
Vector children = new Vector();
if(level < 3) {
children.add( new MyTreeNode(level + ".1", "node" + level + ".1") );
children.add( new MyTreeNode(level + ".2", "node" + level + ".2") );
children.add( new MyTreeNode(level + ".3", "node" + level + ".3") );
for(int i = 0; i < children.size(); i++) {
TreeNode child =
this.addNode((MyTreeNode)children.elementAt(i), level + 1);
node1.getChildren().add(child);
}
}
return node1;
}
public UITreeData getTree() {
return tree;
}
public void setTree(UITreeData tree) {
this.tree = tree;
}
public UISelectBoolean getCheckbox() {
return checkbox;
}
public void setCheckbox(UISelectBoolean checkbox) {
this.checkbox = checkbox;
}
public void submitTree(ActionEvent e) {
TreeNode root = this.tree.getNode();
if(root != null) {
... // *** ROOT IS ALWAYS NULL. THIS BLOCK IS NEVER EXECUTED ***
}
}
}
MyTreeNode is a simple bean:
class MyTreeNode {
private String name;
private String id;
public MyTreeNode(String id, String name) {
this.id = id;
this.name = name;
}
public String getId() { return id; }
public String getName() { return name; }
public void setId(String id) { this.id = id; }
public void setName(String name) { this.name = name; }
}
And here's the view:
<[EMAIL PROTECTED] uri="http://java.sun.com/jsf/html"; prefix="h"%>
<[EMAIL PROTECTED] uri="http://myfaces.apache.org/tomahawk"; prefix="t"%>
<[EMAIL PROTECTED] uri="http://java.sun.com/jsf/core"; prefix="f"%>
<f:view>
<h:form>
<t:tree2 binding="#{myBean.tree}"
value="#{myBean.treeData}"
var="node"
varNodeToggler="t"
clientSideToggle="false"
showLines="true"
showRootNode="true"
preserveToggle="true"
id="tree">
<f:facet name="root">
<h:panelGroup>
<h:outputText value="<strong>root</strong>"
styleClass="nodeFolder" escape="false"/>
</h:panelGroup>
</f:facet>
<f:facet name="central-node">
<h:panelGroup>
<h:selectBooleanCheckbox id="relation"
binding="#{myBean.checkbox}" />
<h:commandLink immediate="true" action="#{t.toggleExpanded}">
<h:outputText value="<strong>#{node.description}</strong>"
styleClass="nodeFolder" escape="false" />
</h:commandLink>
</h:panelGroup>
</f:facet>
</t:tree2>
<h:commandButton value="do something" action="#{myBean.submitTree}" />
</h:form>
</f:view>
The problem is in the submitTree() method: in fact the root node is always null!
begin:vcard
fn:Enrico Triolo
n:Triolo;Enrico
org:ITC-irst
adr:;;Via Sommarive, 18;Povo;Trento;;Italy
email;internet:[EMAIL PROTECTED]
version:2.1
end:vcard
