TreeRendererpublic class TreeRenderer extends javax.faces.render.Renderer | This class is a JSF Renderer for the "com.mycompany.Tree"
component type. It renders a tree structure for the nodes
represented by the component's model using the "openNode",
"closedNode" and "leafNode" facets. |
| Methods Summary |
|---|
| public void | encodeChildren(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component)Calls encodeNodes() to write the HTML elements for all nodes,
within a "span" element with an "id" attribute set to the
component's client ID if explicitly set.
if (!component.isRendered()) {
return;
}
if (((UITree) component).getValue() == null) {
return;
}
ResponseWriter out = context.getResponseWriter();
String clientId = null;
if (component.getId() != null &&
!component.getId().startsWith(UIViewRoot.UNIQUE_ID_PREFIX)) {
clientId = component.getClientId(context);
}
boolean isOuterSpanUsed = false;
if (clientId != null) {
isOuterSpanUsed = true;
out.startElement("span", component);
out.writeAttribute("id", clientId, "id");
}
encodeNodes(context, out, (UITree) component, null, 0);
((UITree) component).setNodeId(null);
if (isOuterSpanUsed) {
out.endElement("span");
}
| | private void | encodeNodes(javax.faces.context.FacesContext context, javax.faces.context.ResponseWriter out, com.mycompany.jsf.component.UITree tree, java.lang.String parentId, int childLevel)Iterates over all expanded nodes in the model and processes the
appropriate facet for each node. Writes a "br" elements after
each node and embeds child nodes within a "blockquote" element.
UIComponent facet = null;
tree.setNodeId(parentId != null ?
parentId + NamingContainer.SEPARATOR_CHAR + childLevel : "0");
TreeNode node = tree.getNode();
if (node.isLeafNode()) {
facet = tree.getLeafNode();
}
else if (node.isExpanded()) {
facet = tree.getOpenNode();
}
else {
facet = tree.getClosedNode();
}
encodeRecursive(context, facet);
out.startElement("br", tree);
out.endElement("br");
if (node.isExpanded()) {
out.startElement("blockquote", tree);
int kidId = 0;
String currId = tree.getNodeId();
Iterator i = node.getChildren().iterator();
while (i.hasNext()) {
TreeNode kid = (TreeNode) i.next();
encodeNodes(context, out, tree, currId, kidId++);
}
out.endElement("blockquote");
}
| | private void | encodeRecursive(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component)Calls the appropriate encoding methods on the component and
calls itself recursively for all component children.
if (!component.isRendered()) {
return;
}
component.encodeBegin(context);
if (component.getRendersChildren()) {
component.encodeChildren(context);
} else {
Iterator i = component.getChildren().iterator();
while (i.hasNext()) {
UIComponent child = (UIComponent) i.next();
encodeRecursive(context, child);
}
}
component.encodeEnd(context);
| | public boolean | getRendersChildren()Returns "true".
return true;
|
|
