jaxx.runtime.swing.nav

Interface NavNode<M,N extends NavNode<M,N>>

All Superinterfaces:

Cloneable, Serializable, TreeNode

All Known Implementing Classes:

NavTreeNode, NavTreeTableNode

public interface NavNode<M,N extends NavNode<M,N>>
extends Cloneable, TreeNode, Serializable

Definition of a node with a optional childLoador to build childs of node.

A node is identified by an getId() of an associated data of type getInternalClass().

Note:

While using a childLoador, we can not know before node was loaded the exact count of his childs. As a matter of facts, real leaf nodes appears at the beginning in ui as a not leaf (there is a root handler). When node was loaded, a leaf node will be then displayed as required.

Why NavNode is generic ?

In a project, you should implements your own Node extending with one like this :

 class MyNode extends NavNode { ... }
 

While in this class, you overrides every method with a node return type, co-variance you'll be able to use this code :

 MyNode parentNode = new MyNode();
 MyNode node = parentNode.getFirstNode();
 

So for final application this generic type avoid any cast for your own node type, this is quite convinient.

Even if in your project, you wants to have a heriarchy of nodes, this will still works (if you use a genercic type on your abstract nodes).

Internal states

• internalClass : the type of data associated with the node
• context : an optinal context to distinguish different types of node with same internalclass
• id : id of the data associated with the node
• dirty : flag sets to true when node render MUST be recomputed
• loaded : flag sets to true when node was loaded
• childLoador : optional loador of childs

Static nodes

Some nodes do not need auto-loading, we call them static nodes. The method isStaticNode() gives this state.

Note: A static node has no childLoador.

Node loading

Initialy node has no data child nodes, (isLoaded() equals false). when model requires node's childs, it can load them via method populateNode(NavBridge, NavDataProvider, boolean) and populateChilds(NavBridge, NavDataProvider) methods.

Node rendering

AbstractNavTreeCellRenderer looks the isDirty() state to know when render should be (re-)compute and set back the state to false.

Each time, a node is modified, the isDirty() should be set to true.

Since:

2.1

Author:

Tony Chemit - chemit@codelutin.com

Method Summary

Methods

Modifier and Type	Method and Description
void	add(N node)
N	findNodeById(String id, NavBridge<M,N> bridge, NavDataProvider provider) Given an id, obtain the child with matching id.
N	getChild(String id, NavBridge<M,N> bridge, NavDataProvider provider) Given an id, obtain the child with matching id.
N	getContainerNode() Gets the first node form this one to the root which has a none String type.
String	getContext()
String	getId()
Class<?>	getInternalClass()
N	getParent()
Object	getUserObject()
void	insert(N node, int position)
boolean	isDirty()
boolean	isLeaf()
boolean	isLoaded()
boolean	isRoot()
boolean	isStaticNode() To know if the node is static.
boolean	isStringNode() Convinient method to known if the node is a String typed.
void	populateChilds(NavBridge<M,N> bridge, NavDataProvider provider) To populate childs of the node (only when a none static node).
void	populateNode(NavBridge<M,N> bridge, NavDataProvider provider, boolean populateChilds) To populate the node.
void	remove(N node)
void	setDirty(boolean dirty) Changes the isDirty() state.
String	toString()

Methods inherited from interface javax.swing.tree.TreeNode

children, getAllowsChildren, getChildAt, getChildCount, getIndex

Method Detail

getId

String getId()

getContext

String getContext()

getInternalClass

Class<?> getInternalClass()

isLoaded

boolean isLoaded()

isDirty

boolean isDirty()

isStringNode

boolean isStringNode()

Convinient method to known if the node is a String typed.

Returns:

true if the type of node if

isStaticNode

boolean isStaticNode()

To know if the node is static.

A static node has no childLoador.

Returns:

true when the node is static : says, the node has no childLoador.

getContainerNode

N getContainerNode()

Gets the first node form this one to the root which has a none String type.

Returns:

the first concrete node type

findNodeById

N findNodeById(String id,
             NavBridge<M,N> bridge,
             NavDataProvider provider)

Given an id, obtain the child with matching id.

If node is NOT loaded, then first loads it (method populateChilds(NavBridge, NavDataProvider)) then do search on direct childs of the node recursivly.

Parameters:

id - the id of the researched node

bridge - model owner of nodes

provider - data provider

Returns:

the found node or null if not found

getChild

N getChild(String id,
         NavBridge<M,N> bridge,
         NavDataProvider provider)

Given an id, obtain the child with matching id.

If node is NOT loaded, then first loads it (method populateChilds(NavBridge, NavDataProvider)) then return on direct childs of the node.

Parameters:

id - the id of the researched node

bridge - model owner of nodes

provider - data provider

Returns:

the found node or null if not found

setDirty

void setDirty(boolean dirty)

Changes the isDirty() state.

As a side effect, when a renderer will use this node, it will force to reload the render from the NavDataProvider.

Parameters:

dirty - the new dirty value

isLeaf

boolean isLeaf()

Specified by:

isLeaf in interface TreeNode

getUserObject

Object getUserObject()

toString

String toString()

Overrides:

toString in class Object

populateNode

void populateNode(NavBridge<M,N> bridge,
                NavDataProvider provider,
                boolean populateChilds)

To populate the node. A side-effect of this method is to set dirty the node (renderer will recompute the render of the node).

If populateChilds is set to true, then also populate childs of the node using the given dataProvider.

Parameters:

bridge - le delegate modèles content le noeud

provider - le provider de données

populateChilds - un drapeau pour charger aussi les fils du noeud courant

populateChilds

void populateChilds(NavBridge<M,N> bridge,
                  NavDataProvider provider)

To populate childs of the node (only when a none static node). A side-effect of this method is to set loaded of the node.

For a static node, do nothing.

Parameters:

bridge - model owner of the node

provider - data provider

isRoot

boolean isRoot()

getParent

N getParent()

Specified by:

getParent in interface TreeNode

add

void add(N node)

remove

void remove(N node)

insert

void insert(N node,
          int position)