NavHelper (JAXX :: Runtime 2.32 API)

java.lang.Object
- jaxx.runtime.swing.nav.NavHelper<M,U,B,N>

Type Parameters:

U - Type of ui to bridge

Direct Known Subclasses:

NavTreeHelper, NavTreeTableHelper
```
public abstract class NavHelper<M,U,B extends NavBridge<M,N>,N extends NavNode<M,N>>
extends Object
```
Tree helper to deal with the build of trees and other usefull operations. A helper acts as an handler for a tree. It owns the getModel() of the #tree. Note: A helper can NOT be used to manage multi-trees.
Internal states

Internal model
To create the model, use method createModel(NavNode, Object...) given a root node. To obtain the model, use method getModel(). Note: The helper internal model can be different from the tree model, but must be the lowest model, other models must listen nicely this model to obtain model modification and selection notifications.
Internal tree
As said before, a helper matches exactly one tree. To register the tree, use method setUI(Object, boolean, TreeSelectionListener). To obtain the tree, use method getUI().
Internal data provider
To populate childs nodes and render nodes, we use a NavDataProvider. To register the data provider, use method setDataProvider(NavDataProvider). To obtain the data provider, use method getDataProvider().
Internal listeners
Several listeners are used to manage the auto-loading of nodes in model :
expandListener
This listener will load node's childs before node expands if the node is not loaded. See the NavNode.isLoaded() method.
treeModelListener
To listen modification of the model, it will mainly repopulate nodes when required. See the method populateNode(NavNode, Object[], boolean).
selectionListener
To listen modification of the selection, it will mainly expand paths if required. This is a requirement, since childs of a node should NOT be loaded, so when selects a node, always check the path from root to selected node are all fully loaded.
Model methods
The helper offers some methods to modify and query the internal tree model.
Model modification
Model selection modification
Model query
- findNode(NavNode, String...)
Child loadors factory
The class offers a factory of NavNodeChildLoador, use the method getChildLoador(Class) to obtain the correct child loador given his type.
Since:

2.1

Author:

Tony Chemit - chemit@codelutin.com

See Also:

NavNode, NavNodeChildLoador, AbstractNavTreeCellRenderer

Field Summary

Fields
Modifier and Type	Field and Description
`protected static Set<? super NavNodeChildLoador<?,?,?,?,?>>`	`childLoadors` Cache of child loadors.
`protected NavDataProvider`	`dataProvider` The shared data provider used to obtain datas to populate nodes and render them.
`protected TreeWillExpandListener`	`expandListener` A `TreeWillExpandListener` used to listen when tree should expand.
`protected TreeSelectionListener`	`selectionListener` pour ouvrir les fils d'un noeud que l'on vient de sélectionner pour éviter d'avoir à faire des doubles clics.
`protected TreeModelListener`	`treeModelListener` pour recharger le rendu des noeuds (et charger les fils si nécessaires) lors d'une modification dans le modèle de l'arbre.

Constructor Summary

Constructors
Constructor and Description

NavHelper(B bridge)

Constructors
Constructor and Description
`NavHelper(B bridge)`

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`abstract void`	`addSelectionPath(TreePath path)`
`abstract void`	`addSelectionPaths(TreePath[] paths)`
`protected boolean`	`checkModel()` Checks if internal model was created.
`protected abstract M`	`createModel(N node, Object... extraArgs)` Register a new root node.
`abstract void`	`expandPath(TreePath pathToExpand)`
`N`	`findNode(N node, String... ids)` Finds a node from the given root `node`, applying the path given by `ids`.
`protected B`	`getBridge()` Obtains the bridge .
`N`	`getChild(N node, String id)` Finds a node from the given root `node`, and return child searched
`static <L extends NavNodeChildLoador<?,?,?,?,?>> L`	`getChildLoador(Class<L> type)` Obtains the `NavNodeChildLoador` of the given `type` from internal cache.
`protected static Set<? super NavNodeChildLoador<?,?,?,?,?>>`	`getChildLoadors()`
`protected NavDataProvider`	`getDataProvider()` Obtains the attached data provider used to populate and render nodes.
`M`	`getModel()` Obtains the model.
`protected N`	`getNode(TreePath path)` Convinient method to objet the casted node of a `TreePath`.
`N`	`getRootNode()`
`String[]`	`getSelectedIds()` Obtains the path of ids fro the root node to the selected node on the registred tree.
`abstract N`	`getSelectedNode()` Obtains the selected node of the registred tree.
`abstract List<N>`	`getSelectedNodes()` Obtains the selected nodes of the registred tree.
`abstract TreeSelectionModel`	`getSelectionModel()`
`abstract AbstractNavTreeCellRenderer<M,N>`	`getTreeCellRenderer()` Obtains the `AbstractNavTreeCellRenderer` renderer of the registred tree.
`U`	`getUI()` Obtains the ui associated with model in helper.
`void`	`insertNode(N parentNode, N newNode)` Inserts the given node to the given `parentNode`.
`void`	`insertNode(N parentNode, N newNode, int position)` Inserts the given node to the given `parentNode`.
`abstract boolean`	`isExpanded(TreePath pathToExpand)`
`void`	`loadAllNodes(N node, NavDataProvider dataProvider)` To load all nodes of a model.
`void`	`moveNode(N parentNode, N node, int position)` Moves the given `node` to the new `position`.
`protected void`	`populateNode(N node, Object[] children, boolean recurse)` Populates nodes.
`void`	`refreshNode(N node, boolean deep)` Refreshs the given `node`.
`N`	`removeNode(N node)` Removes the given `node` from the registred tree model and returns his parent.
`abstract void`	`removeSelectionPath(TreePath path)`
`abstract void`	`removeSelectionPaths(TreePath[] paths)`
`abstract void`	`scrollPathToVisible(TreePath path)`
`void`	`selectNode(N node)` Selects the given `node` in the registred tree.
`void`	`selectNode(String... path)` Selects the node described by his given `path` of ids.
`void`	`selectNodes(List<N> nodes)` Selects the given `nodes` in the registred tree.
`void`	`selectParentNode()` Selects the parent of the currently selected node.
`void`	`setDataProvider(NavDataProvider dataProvider)` Registers the `dataProvider` for the helper.
`abstract void`	`setSelectionPath(TreePath path)`
`protected void`	`setUI(U ui)`
`void`	`setUI(U tree, boolean addExpandTreeListener)` Registers the given `tree` for this helper.
`void`	`setUI(U tree, boolean addExpandTreeListener, boolean addOneClickSelectionListener, TreeSelectionListener listener)` Registers the given `tree` for this helper.
`abstract void`	`setUI(U tree, boolean addExpandTreeListener, boolean addOneClickSelectionListener, TreeSelectionListener listener, TreeWillExpandListener willExpandListener)` Registers the given `tree` for this helper.
`void`	`setUI(U tree, boolean addExpandTreeListener, TreeSelectionListener listener)` Registers the given `tree` for this helper.
`void`	`unSelectNode(N node)` Unselects the given `node` in the registred tree.
`void`	`unSelectNodes(List<N> nodes)` Selects the given `nodes` in the registred tree.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - dataProvider
```
protected NavDataProvider dataProvider
```
    The shared data provider used to obtain datas to populate nodes and render them.
  - expandListener
```
protected TreeWillExpandListener expandListener
```
    A TreeWillExpandListener used to listen when tree should expand. If so, the listener will load selected node childs if required (says when the NavNode.isLoaded() is sets to false).
  - selectionListener
```
protected TreeSelectionListener selectionListener
```
    pour ouvrir les fils d'un noeud que l'on vient de sélectionner pour éviter d'avoir à faire des doubles clics.
  - treeModelListener
```
protected TreeModelListener treeModelListener
```
    pour recharger le rendu des noeuds (et charger les fils si nécessaires) lors d'une modification dans le modèle de l'arbre.
  - childLoadors
```
protected static Set<? super NavNodeChildLoador<?,?,?,?,?>> childLoadors
```
    Cache of child loadors.
- Constructor Detail
  - NavHelper
```
public NavHelper(B bridge)
```
- Method Detail
  - scrollPathToVisible
```
public abstract void scrollPathToVisible(TreePath path)
```
  - setSelectionPath
```
public abstract void setSelectionPath(TreePath path)
```
  - addSelectionPath
```
public abstract void addSelectionPath(TreePath path)
```
  - addSelectionPaths
```
public abstract void addSelectionPaths(TreePath[] paths)
```
  - removeSelectionPath
```
public abstract void removeSelectionPath(TreePath path)
```
  - removeSelectionPaths
```
public abstract void removeSelectionPaths(TreePath[] paths)
```
  - getSelectionModel
```
public abstract TreeSelectionModel getSelectionModel()
```
  - isExpanded
```
public abstract boolean isExpanded(TreePath pathToExpand)
```
  - expandPath
```
public abstract void expandPath(TreePath pathToExpand)
```
  - createModel
```
protected abstract M createModel(N node,
                                 Object... extraArgs)
```
    Register a new root node. If internal getModel() does not exists, creates a new one from his given root node, otherwise just set the new root on the existing model. Note: As a side-effect, the model will be keep in field getModel() and the treeModelListener will be registred on this model.
    
    Parameters:
    
    node - the root node of the new model
    
    extraArgs - extra args to create initial model
    
    Returns:
    
    the new model
  - getTreeCellRenderer
```
public abstract AbstractNavTreeCellRenderer<M,N> getTreeCellRenderer()
```
    Obtains the AbstractNavTreeCellRenderer renderer of the registred tree.
    
    Returns:
    
    the renderer of the registred tree or null if no tree was registred nor the renderer is a AbstractNavTreeCellRenderer.
  - getSelectedNode
```
public abstract N getSelectedNode()
```
    Obtains the selected node of the registred tree.
    
    Returns:
    
    the selected tree or null if no registred tree nor selection empty.
  - getSelectedNodes
```
public abstract List<N> getSelectedNodes()
```
    Obtains the selected nodes of the registred tree.
    
    Returns:
    
    the selected tree or null if no registred tree nor selection empty.
  - setUI
```
public abstract void setUI(U tree,
                           boolean addExpandTreeListener,
                           boolean addOneClickSelectionListener,
                           TreeSelectionListener listener,
                           TreeWillExpandListener willExpandListener)
```
    Registers the given tree for this helper. Note: as a side-effect, it will register (if required) the expandListener listener and (if required) the selectionListener. Note : as a second side-effect, it will register the given willExpandListener (if not null) for the ui and do it BEFORE the expandListener. The main idea here is to be able to block any expand (or collapse).
    
    Parameters:
    
    tree - the tree to register
    
    addExpandTreeListener - a flag to add expand listener
    
    addOneClickSelectionListener - a flag to expend when selection
    
    listener - the optional selection listener to add
    
    willExpandListener - the optional will expand listener to add BEFORE the default expand tree listener (if he was required)
    
    Since:
    
    2.1.2
  - getChildLoadors
```
protected static Set<? super NavNodeChildLoador<?,?,?,?,?>> getChildLoadors()
```
  - getChildLoador
```
public static <L extends NavNodeChildLoador<?,?,?,?,?>> L getChildLoador(Class<L> type)
```
    Obtains the NavNodeChildLoador of the given type from internal cache. Note: The loador will be instanciated if not found, and push in cache.
    
    Type Parameters:
    
    L - the type of loador to get
    
    Parameters:
    
    type - the type of loador to get
    
    Returns:
    
    the loador from cache
  - getDataProvider
```
protected NavDataProvider getDataProvider()
```
    Obtains the attached data provider used to populate and render nodes.
    
    Returns:
    
    the attached data provider
  - getModel
```
public M getModel()
```
    Obtains the model.
    
    Returns:
    
    the internal tree model or null if none was created.
  - getBridge
```
protected B getBridge()
```
    Obtains the bridge .
    
    Returns:
    
    the internal bridge used by helper.
  - getUI
```
public U getUI()
```
    Obtains the ui associated with model in helper.
    
    Returns:
    
    the ui (or null if no ui attached)
  - getRootNode
```
public N getRootNode()
```
  - getSelectedIds
```
public String[] getSelectedIds()
```
    Obtains the path of ids fro the root node to the selected node on the registred tree.
    
    Returns:
    
    the array of ids from root node to selected node.
  - setUI
```
public void setUI(U tree,
                  boolean addExpandTreeListener)
```
    Registers the given tree for this helper. Note: as a side-effect, it will register (if required) the expandListener listener and the selectionListener.
    
    Parameters:
    
    tree - the tree to register
    
    addExpandTreeListener - a flag to add expand listener
  - setUI
```
public void setUI(U tree,
                  boolean addExpandTreeListener,
                  TreeSelectionListener listener)
```
    Registers the given tree for this helper. Note: as a side-effect, it will register (if required) the expandListener listener and the selectionListener.
    
    Parameters:
    
    tree - the tree to register
    
    addExpandTreeListener - a flag to add expand listener
    
    listener - the optional selection listener to add
  - setUI
```
public void setUI(U tree,
                  boolean addExpandTreeListener,
                  boolean addOneClickSelectionListener,
                  TreeSelectionListener listener)
```
    Registers the given tree for this helper. Note: as a side-effect, it will register (if required) the expandListener listener and (if required) the selectionListener.
    
    Parameters:
    
    tree - the tree to register
    
    addExpandTreeListener - a flag to add expand listener
    
    addOneClickSelectionListener - a flag to expend when selection
    
    listener - the optional selection listener to add
  - setDataProvider
```
public void setDataProvider(NavDataProvider dataProvider)
```
    Registers the dataProvider for the helper. Node: As a side-effect, the provider will be propagate to the renderer of the registred tree (if any).
    
    Parameters:
    
    dataProvider - the data provider to use
  - insertNode
```
public void insertNode(N parentNode,
                       N newNode)
```
    Inserts the given node to the given parentNode. The node will be added to his parent, then creation listeners will be fired.
    
    Parameters:
    
    parentNode - the parent node where to insert the new node *
    
    newNode - the node to insert
  - insertNode
```
public void insertNode(N parentNode,
                       N newNode,
                       int position)
```
    Inserts the given node to the given parentNode. The node will be added to his parent, then creation listeners will be fired.
    
    Parameters:
    
    parentNode - the parent node where to insert the new node *
    
    newNode - the node to insert
    
    position - position of node is inserted
  - removeNode
```
public N removeNode(N node)
```
    Removes the given node from the registred tree model and returns his parent.
    
    Parameters:
    
    node - the node to remove
    
    Returns:
    
    the parent node of the removed node.
  - moveNode
```
public void moveNode(N parentNode,
                     N node,
                     int position)
```
    Moves the given node to the new position.
    
    Parameters:
    
    parentNode - the parent node
    
    node - the node to move
    
    position - the new position of the node
  - refreshNode
```
public void refreshNode(N node,
                        boolean deep)
```
    Refreshs the given node. If flag deep is set to true, then it will refresh recursively children nodes. Note:As a side-effect, evvery node involved will become dirty.
    
    Parameters:
    
    node - the node to refresh
    
    deep - un flag pour activer la repainte de la descendance du noeud
    
    See Also:
    
    NavNode.isDirty()
  - loadAllNodes
```
public void loadAllNodes(N node,
                         NavDataProvider dataProvider)
```
    To load all nodes of a model.
    
    Parameters:
    
    node - the root node to load
    
    dataProvider - the data provider used to populate nodes
  - selectParentNode
```
public void selectParentNode()
                      throws NullPointerException
```
    Selects the parent of the currently selected node. Note: If selection is empty, then throws a NPE.
    
    Throws:
    
    NullPointerException - if selection is empty
  - selectNode
```
public void selectNode(N node)
```
    Selects the given node in the registred tree.
    
    Parameters:
    
    node - the node to select
  - selectNodes
```
public void selectNodes(List<N> nodes)
```
    Selects the given nodes in the registred tree.
    
    Parameters:
    
    nodes - the nodes to select
  - unSelectNode
```
public void unSelectNode(N node)
```
    Unselects the given node in the registred tree.
    
    Parameters:
    
    node - the node to select
  - unSelectNodes
```
public void unSelectNodes(List<N> nodes)
```
    Selects the given nodes in the registred tree.
    
    Parameters:
    
    nodes - the nodes to select
  - selectNode
```
public void selectNode(String... path)
```
    Selects the node described by his given path of ids.
    
    Parameters:
    
    path - the absolute path of ids from root node to node to select.
  - findNode
```
public N findNode(N node,
                  String... ids)
```
    Finds a node from the given root node, applying the path given by ids.
    
    Parameters:
    
    node - the starting node
    
    ids - the path of ids to apply on the node.
    
    Returns:
    
    the find node or null if no node matchs.
  - getChild
```
public N getChild(N node,
                  String id)
```
    Finds a node from the given root node, and return child searched
    
    Parameters:
    
    node - the starting node
    
    id - id of searched child
    
    Returns:
    
    the find node or null if no node matchs.
  - checkModel
```
protected boolean checkModel()
```
    Checks if internal model was created.
    
    Returns:
    
    true if model was created, false otherwise.
  - populateNode
```
protected void populateNode(N node,
                            Object[] children,
                            boolean recurse)
```
    Populates nodes. If node is not null, then populate it. If children is not null, then populate them, moreover if recurse is set to true then do a recurse refresh on children.
    
    Parameters:
    
    node - the parent node to populate (optional)
    
    children - the child nodes to populate (optional)
    
    recurse - flag sets to true if should do recurse refresh on given children nodes.
  - getNode
```
protected N getNode(TreePath path)
```
    Convinient method to objet the casted node of a TreePath.
    
    Parameters:
    
    path - the path contaning the node.
    
    Returns:
    
    the casted node from the path.
  - setUI
```
protected void setUI(U ui)
```

Class NavHelper<M,U,B extends NavBridge<M,N>,N extends NavNode<M,N>>

Internal states

Internal model

Internal tree

Internal data provider

Internal listeners

expandListener

treeModelListener

selectionListener

Model methods

Model modification

Model selection modification

Model query

Child loadors factory

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

dataProvider

expandListener

selectionListener

treeModelListener

childLoadors

Constructor Detail

NavHelper

Method Detail

scrollPathToVisible

setSelectionPath

addSelectionPath

addSelectionPaths

removeSelectionPath

removeSelectionPaths

getSelectionModel

isExpanded

expandPath

createModel

getTreeCellRenderer

getSelectedNode

getSelectedNodes

setUI

getChildLoadors

getChildLoador

getDataProvider

getModel

getBridge

getUI

getRootNode

getSelectedIds

setUI

setUI

setUI

setDataProvider

insertNode

insertNode

removeNode

moveNode

refreshNode

loadAllNodes

selectParentNode

selectNode

selectNodes

unSelectNode

unSelectNodes

selectNode

findNode

getChild

checkModel

populateNode

getNode

setUI

`expandListener`

`treeModelListener`

`selectionListener`