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java.lang.Objectorg.apache.webapp.admin.TreeControl
public class TreeControl
The overall data structure representing a tree control
that can be rendered by the TreeControlTag
custom tag.
Each node of the tree is represented by an instance of
TreeControlNode
.
Field Summary | |
---|---|
protected java.util.HashMap |
registry
The collection of nodes that represent this tree, keyed by name. |
protected TreeControlNode |
root
The root node of the entire tree. |
protected TreeControlNode |
selected
The most recently selected node. |
Constructor Summary | |
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TreeControl()
Construct a new instance with no predefined root node. |
|
TreeControl(TreeControlNode root)
Construct a new instance with the specified root node. |
Method Summary | |
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TreeControlNode |
findNode(java.lang.String name)
Find and return the TreeControlNode for the specified
node name, if it exists; otherwise, return null . |
TreeControlNode |
getRoot()
|
int |
getWidth()
The current displayable "width" of this tree (that is, the maximum depth of the visible part of the tree). |
void |
removeNode(TreeControlNode node)
Deregister the specified node, as well as all child nodes of this node, from our registry of the complete tree. |
void |
selectNode(java.lang.String name)
Mark the specified node as the one-and-only currently selected one, deselecting any previous node that was so marked. |
protected void |
setRoot(TreeControlNode root)
|
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected java.util.HashMap registry
protected TreeControlNode selected
protected TreeControlNode root
Constructor Detail |
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public TreeControl()
public TreeControl(TreeControlNode root)
root
- The new root nodeMethod Detail |
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public TreeControlNode getRoot()
protected void setRoot(TreeControlNode root)
public int getWidth()
public TreeControlNode findNode(java.lang.String name)
TreeControlNode
for the specified
node name, if it exists; otherwise, return null
.
name
- Name of the TreeControlNode
to be returnedpublic void selectNode(java.lang.String name)
node
- Name of the node to mark as selected, or null
if there should be no currently selected nodepublic void removeNode(TreeControlNode node)
node
- The TreeControlNode
to be deregistered
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