com.smartgwt.client.widgets.tree

Class ResultTree

java.lang.Object

com.smartgwt.client.core.BaseClass

com.smartgwt.client.widgets.tree.Tree

com.smartgwt.client.widgets.tree.ResultTree

All Implemented Interfaces:

com.google.gwt.event.shared.HasHandlers, HasDataChangedHandlers

public class ResultTree
extends Tree

ResultTrees are an implementation of the Tree API, used to handle hierarchical data, whose nodes are DataSource records which are retrieved from a server.

Field Summary

Fields inherited from class com.smartgwt.client.core.BaseClass

config, id, scClassName

Constructor Summary

Constructors

Constructor and Description
ResultTree()
ResultTree(com.google.gwt.core.client.JavaScriptObject jsObj)

Method Summary

Methods

Modifier and Type	Method and Description
Tree	applyFilter(Tree tree, Criteria criteria, TreeFilterMode filterMode, DataSource dataSource) The ResultTree will call applyFilter() when it needs to locally filter the tree using the current filter criteria.
Tree	applyFilter(Tree tree, Criteria criteria, TreeFilterMode filterMode, DataSource dataSource, DSRequest requestProperties) The ResultTree will call applyFilter() when it needs to locally filter the tree using the current filter criteria.
int	compareCriteria(Criteria newCriteria, Criteria oldCriteria) Default behavior is to call DataSource.compareCriteria to determine whether new criteria is equivalent to the old criteria (returns 0) or not.
int	compareCriteria(Criteria newCriteria, Criteria oldCriteria, DSRequest requestProperties) Default behavior is to call DataSource.compareCriteria to determine whether new criteria is equivalent to the old criteria (returns 0) or not.
com.google.gwt.core.client.JavaScriptObject	create()
void	dataArrived(TreeNode parentNode) This callback fires whenever the resultTree receives new nodes from the server, after the new nodes have been integrated into the tree.
PreserveOpenState	getAutoPreserveOpenState() Controls what happens to the "open state" - the set of nodes opened or closed by the end user after tree data is loaded - when an entirely new tree of nodes is loaded from the server, as a consequence of calling ResultTree.invalidateCache or of changing criteria such that the current cache of nodes is dropped.
DataSource	getDataSource() What DataSource is this resultTree associated with?
java.lang.Boolean	getDefaultIsFolder() Controls whether nodes are assumed to be folders or leaves by default.
java.lang.Boolean	getDefaultNewNodesToRoot() This attribute governs how to handle cache-synch when a new node is added to this dataSource with no explicit parentId.
java.lang.Boolean	getDisableCacheSync() By default when the data of this ResultTree's dataSource is modified, the ResultTree will be updated to display these changes.
java.lang.Boolean	getDiscardParentlessNodes() When data is loaded from the server, should nodes with an explicit value for the parentIdField which doesn't map to a valid parent node be dropped? If set to false, for loadDataOnDemand:false trees, parentless nodes will be added as children of the root node - for loadDataOnDemand:true, they will be added as children of the folder currently requesting children.
FetchMode	getFetchMode() Mode of fetching records from server.
java.lang.Boolean	getKeepParentsOnFilter() If set, tree-based filtering is performed such that parent nodes are kept as long as they have children that match the filter criteria, even if the parents themselves do not match the filter criteria.
java.lang.Boolean	getLoadDataOnDemand() Does this resultTree load data incrementally as folders within the tree are opened, or is it all loaded in a single request?
java.lang.String	getOpenState() Returns a snapshot of the current open state of this tree's data as a TreeGridOpenState object.
static ResultTree	getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj)
com.google.gwt.core.client.JavaScriptObject	getRootNode() This attribute may be used to specify a root value for the parentIdField of this resultTree.
java.lang.String[]	getServerFilterFields() When keepParentsOnFilter is enabled, this property lists field names that will be sent to the server if they are present in criteria.
java.lang.Boolean	getUpdateCacheFromRequest() When a successful Add, Update or Remove type operation fires on this ResultTree's dataSource, if data is unset, should we integrate the submitted data values (from the request) into our data-set?
void	invalidateCache() Manually invalidate this ResultTree's cache.
void	setAutoPreserveOpenState(PreserveOpenState autoPreserveOpenState) Controls what happens to the "open state" - the set of nodes opened or closed by the end user after tree data is loaded - when an entirely new tree of nodes is loaded from the server, as a consequence of calling ResultTree.invalidateCache or of changing criteria such that the current cache of nodes is dropped.
void	setCriteria(Criteria newCriteria) Set the filter criteria to use when fetching rows.
void	setDataSource(DataSource dataSource) What DataSource is this resultTree associated with?
void	setDefaultIsFolder(java.lang.Boolean defaultIsFolder) Controls whether nodes are assumed to be folders or leaves by default.
void	setDefaultNewNodesToRoot(java.lang.Boolean defaultNewNodesToRoot) This attribute governs how to handle cache-synch when a new node is added to this dataSource with no explicit parentId.
void	setDisableCacheSync(java.lang.Boolean disableCacheSync) By default when the data of this ResultTree's dataSource is modified, the ResultTree will be updated to display these changes.
void	setDiscardParentlessNodes(java.lang.Boolean discardParentlessNodes) When data is loaded from the server, should nodes with an explicit value for the parentIdField which doesn't map to a valid parent node be dropped? If set to false, for loadDataOnDemand:false trees, parentless nodes will be added as children of the root node - for loadDataOnDemand:true, they will be added as children of the folder currently requesting children.
void	setFetchMode(FetchMode fetchMode) Mode of fetching records from server.
void	setJavaScriptObject(com.google.gwt.core.client.JavaScriptObject jsObj)
void	setKeepParentsOnFilter(java.lang.Boolean keepParentsOnFilter) If set, tree-based filtering is performed such that parent nodes are kept as long as they have children that match the filter criteria, even if the parents themselves do not match the filter criteria.
void	setLoadDataOnDemand(java.lang.Boolean loadDataOnDemand) Does this resultTree load data incrementally as folders within the tree are opened, or is it all loaded in a single request?
void	setOpenState(java.lang.String openState) Reset the set of open folders within this tree's data to match the TreeGridOpenState object passed in.
void	setRootNode(com.google.gwt.core.client.JavaScriptObject rootNode) This attribute may be used to specify a root value for the parentIdField of this resultTree.
void	setServerFilterFields(java.lang.String... serverFilterFields) When keepParentsOnFilter is enabled, this property lists field names that will be sent to the server if they are present in criteria.
void	setUpdateCacheFromRequest(java.lang.Boolean updateCacheFromRequest) When a successful Add, Update or Remove type operation fires on this ResultTree's dataSource, if data is unset, should we integrate the submitted data values (from the request) into our data-set?
void	unloadChildren(TreeNode node) Unload the children of a folder, returning the folder to the "unloaded" state.
java.lang.Boolean	willFetchData(Criteria newCriteria) Will changing the criteria for this resultTree require fetching new data from the server or can the new criteria be satisfied from data already cached on the client?

Methods inherited from class com.smartgwt.client.widgets.tree.Tree

add, add, add, add, addDataChangedHandler, addList, addList, addList, addList, closeAll, closeAll, closeFolder, closeFolders, find, find, findById, getAllNodes, getAllNodes, getAttribute, getAttributeAsBoolean, getAttributeAsDate, getAttributeAsDouble, getAttributeAsElement, getAttributeAsFloat, getAttributeAsInt, getAttributeAsJavaScriptObject, getAttributeAsString, getAutoOpenRoot, getChildren, getChildrenProperty, getData, getDefaultNodeTitle, getDescendantFolders, getDescendantFolders, getDescendantLeaves, getDescendantLeaves, getDescendants, getDescendants, getFilteredTree, getFilteredTree, getFolders, getIdField, getIsFolderProperty, getLeaves, getLength, getLevel, getLoadState, getModelType, getName, getNameProperty, getOpenList, getOpenProperty, getParent, getParentIdField, getParentPath, getParents, getPath, getPathDelim, getReportCollisions, getRoot, getRootValue, getSeparateFolders, getShowRoot, getSortFoldersBeforeLeaves, getTitle, getTitleProperty, hasChildren, hasFolders, hasLeaves, isDescendantOf, isFolder, isLeaf, isLoaded, isOpen, isRoot, linkNodes, loadChildren, loadChildren, move, move, nodeForRecord, openAll, openAll, openFolder, openFolders, reloadChildren, remove, removeList, setAutoOpenRoot, setChildrenProperty, setData, setDefaultNodeTitle, setIdField, setIsFolderProperty, setModelType, setNameProperty, setOpenProperty, setParentIdField, setPathDelim, setProperty, setProperty, setProperty, setProperty, setReportCollisions, setRoot, setRootValue, setRootValue, setSeparateFolders, setShowRoot, setSortFoldersBeforeLeaves, setTitleProperty

Methods inherited from class com.smartgwt.client.core.BaseClass

asSGWTComponent, destroy, doAddHandler, doInit, error, error, errorIfNotCreated, fireEvent, getAttributeAsMap, getAttributeAsStringArray, getClassName, getConfig, getHandlerCount, getID, getJsObj, getOrCreateJsObj, getRef, getScClassName, internalSetID, internalSetID, isCreated, onBind, onInit, registerID, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setID, setScClassName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.google.gwt.event.shared.HasHandlers

fireEvent

Constructor Detail

ResultTree

public ResultTree()

ResultTree

public ResultTree(com.google.gwt.core.client.JavaScriptObject jsObj)

Method Detail

getOrCreateRef

public static ResultTree getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj)

setJavaScriptObject

public void setJavaScriptObject(com.google.gwt.core.client.JavaScriptObject jsObj)

Overrides:

setJavaScriptObject in class Tree

create

public com.google.gwt.core.client.JavaScriptObject create()

Overrides:

create in class Tree

setAutoPreserveOpenState

public void setAutoPreserveOpenState(PreserveOpenState autoPreserveOpenState)

Controls what happens to the "open state" - the set of nodes opened or closed by the end user after tree data is loaded - when an entirely new tree of nodes is loaded from the server, as a consequence of calling ResultTree.invalidateCache or of changing criteria such that the current cache of nodes is dropped.

Parameters:

autoPreserveOpenState - autoPreserveOpenState Default value is "whenUnique"

getAutoPreserveOpenState

public PreserveOpenState getAutoPreserveOpenState()

Controls what happens to the "open state" - the set of nodes opened or closed by the end user after tree data is loaded - when an entirely new tree of nodes is loaded from the server, as a consequence of calling ResultTree.invalidateCache or of changing criteria such that the current cache of nodes is dropped.

Returns:

PreserveOpenState

setDefaultIsFolder

public void setDefaultIsFolder(java.lang.Boolean defaultIsFolder)
                        throws java.lang.IllegalStateException

Controls whether nodes are assumed to be folders or leaves by default.

Nodes that have children or have the isFolderProperty set to true will always be considered folders. Other nodes will be considered folders or leaves by default according to this setting.

If defaultIsFolder is unset, the ResultTree will automatically set it to match the value of loadDataOnDemand. This means that, when using folder-by-folder load on demand (loadDataOnDemand:true), by default a newly loaded node will be considered to be a folder that has not loaded its children yet.

When not using folder-by-folder load on demand, by default a newly loaded node is considered a leaf. If you set defaultIsFolder:true explicitly, by default a newly loaded node is considered to be a folder with no children.

See Tree.isFolder for details on how to explicitly mark nodes as folders or leaves.

Overrides:

setDefaultIsFolder in class Tree

Parameters:

defaultIsFolder - defaultIsFolder Default value is null

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

See Also:

TreeGrid.setLoadDataOnDemand(java.lang.Boolean)

getDefaultIsFolder

public java.lang.Boolean getDefaultIsFolder()

Controls whether nodes are assumed to be folders or leaves by default.

Nodes that have children or have the isFolderProperty set to true will always be considered folders. Other nodes will be considered folders or leaves by default according to this setting.

If defaultIsFolder is unset, the ResultTree will automatically set it to match the value of loadDataOnDemand. This means that, when using folder-by-folder load on demand (loadDataOnDemand:true), by default a newly loaded node will be considered to be a folder that has not loaded its children yet.

When not using folder-by-folder load on demand, by default a newly loaded node is considered a leaf. If you set defaultIsFolder:true explicitly, by default a newly loaded node is considered to be a folder with no children.

See Tree.isFolder for details on how to explicitly mark nodes as folders or leaves.

Overrides:

getDefaultIsFolder in class Tree

Returns:

Boolean

See Also:

TreeGrid.getLoadDataOnDemand()

setDefaultNewNodesToRoot

public void setDefaultNewNodesToRoot(java.lang.Boolean defaultNewNodesToRoot)

This attribute governs how to handle cache-synch when a new node is added to this dataSource with no explicit parentId.

If set to true, when a new node is added to this dataSource via DataSource.addData, with no explicit parentId, the node will be added as a child of the root node of this result tree. Otherwise it will be ignored.

Similar logic applies to updated nodes - if this property is true and the parentId of an updated node is cleared, it will be moved to become a child of root, otherwise it will be dropped from the tree.

Note : This is an advanced setting

Parameters:

defaultNewNodesToRoot - defaultNewNodesToRoot Default value is false

getDefaultNewNodesToRoot

public java.lang.Boolean getDefaultNewNodesToRoot()

This attribute governs how to handle cache-synch when a new node is added to this dataSource with no explicit parentId.

If set to true, when a new node is added to this dataSource via DataSource.addData, with no explicit parentId, the node will be added as a child of the root node of this result tree. Otherwise it will be ignored.

Similar logic applies to updated nodes - if this property is true and the parentId of an updated node is cleared, it will be moved to become a child of root, otherwise it will be dropped from the tree.

Returns:

Boolean

setDisableCacheSync

public void setDisableCacheSync(java.lang.Boolean disableCacheSync)
                         throws java.lang.IllegalStateException

By default when the data of this ResultTree's dataSource is modified, the ResultTree will be updated to display these changes. Set this flag to true to disable this behavior.

Note : This is an advanced setting

Parameters:

disableCacheSync - disableCacheSync Default value is false

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getDisableCacheSync

public java.lang.Boolean getDisableCacheSync()

By default when the data of this ResultTree's dataSource is modified, the ResultTree will be updated to display these changes. Set this flag to true to disable this behavior.

Returns:

Boolean

setDiscardParentlessNodes

public void setDiscardParentlessNodes(java.lang.Boolean discardParentlessNodes)
                               throws java.lang.IllegalStateException

When data is loaded from the server, should nodes with an explicit value for the parentIdField which doesn't map to a valid parent node be dropped? If set to false, for loadDataOnDemand:false trees, parentless nodes will be added as children of the root node - for loadDataOnDemand:true, they will be added as children of the folder currently requesting children.

This effectively allows nodes to be loaded into the current (or root) folder without needing an explicit parentIdField value that matches the folder's ID or rootValue for the resultTree.

Note: For loadDataOnDemand:false trees, if this property is unset at init time, it will default to true if an explicit rootNode has been specified. This ensures that if the data tree retrieved from the server includes ancestors of the desired root-node we don't display them. Otherwise this property always defaults to false.

Note : This is an advanced setting

Overrides:

setDiscardParentlessNodes in class Tree

Parameters:

discardParentlessNodes - discardParentlessNodes Default value is null

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getDiscardParentlessNodes

public java.lang.Boolean getDiscardParentlessNodes()

When data is loaded from the server, should nodes with an explicit value for the parentIdField which doesn't map to a valid parent node be dropped? If set to false, for loadDataOnDemand:false trees, parentless nodes will be added as children of the root node - for loadDataOnDemand:true, they will be added as children of the folder currently requesting children.

This effectively allows nodes to be loaded into the current (or root) folder without needing an explicit parentIdField value that matches the folder's ID or rootValue for the resultTree.

Note: For loadDataOnDemand:false trees, if this property is unset at init time, it will default to true if an explicit rootNode has been specified. This ensures that if the data tree retrieved from the server includes ancestors of the desired root-node we don't display them. Otherwise this property always defaults to false.

Overrides:

getDiscardParentlessNodes in class Tree

Returns:

Boolean

setFetchMode

public void setFetchMode(FetchMode fetchMode)
                  throws java.lang.IllegalStateException

Mode of fetching records from server.

In a ResultTree, "basic" fetchMode implies that if search criteria change, the entire tree will be discarded and re-fetched from the server. ResultTree.getOpenState will be preserved.

fetchMode:"local" implies that local filtering will be performed. See keepParentsOnFilter for additional filtering details.

fetchMode:"paged" does not apply to ResultTrees. Instead, loadDataOnDemand is used for folder-by-folder loading of tree data. If enough nodes exist that paging is desirable within a folder, a better UI can be obtained by showing an adjacent ListGrid (similar to Outlook email) to show a large number of child nodes.

Parameters:

fetchMode - fetchMode Default value is "basic"

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getFetchMode

public FetchMode getFetchMode()

Mode of fetching records from server.

In a ResultTree, "basic" fetchMode implies that if search criteria change, the entire tree will be discarded and re-fetched from the server. ResultTree.getOpenState will be preserved.

fetchMode:"local" implies that local filtering will be performed. See keepParentsOnFilter for additional filtering details.

fetchMode:"paged" does not apply to ResultTrees. Instead, loadDataOnDemand is used for folder-by-folder loading of tree data. If enough nodes exist that paging is desirable within a folder, a better UI can be obtained by showing an adjacent ListGrid (similar to Outlook email) to show a large number of child nodes.

Returns:

FetchMode

setKeepParentsOnFilter

public void setKeepParentsOnFilter(java.lang.Boolean keepParentsOnFilter)
                            throws java.lang.IllegalStateException

If set, tree-based filtering is performed such that parent nodes are kept as long as they have children that match the filter criteria, even if the parents themselves do not match the filter criteria. If not set, filtering will exclude parent nodes not matching the criteria and all nodes below it in the tree.

When enabled, fetchMode:"local" is automatically enabled so that all filtering behavior shifts to the client-side and full criteria are no longer sent to the server. Instead, server fetches will always load all nodes, or with loadDataOnDemand:true, will always load all nodes under a given parent. This means that the server does not need to implement special tree filtering logic.

Optionally, serverFilterFields can be set to a list of field names that will be sent to the server whenever they are present in the criteria.

Parameters:

keepParentsOnFilter - keepParentsOnFilter Default value is null

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getKeepParentsOnFilter

public java.lang.Boolean getKeepParentsOnFilter()

If set, tree-based filtering is performed such that parent nodes are kept as long as they have children that match the filter criteria, even if the parents themselves do not match the filter criteria. If not set, filtering will exclude parent nodes not matching the criteria and all nodes below it in the tree.

When enabled, fetchMode:"local" is automatically enabled so that all filtering behavior shifts to the client-side and full criteria are no longer sent to the server. Instead, server fetches will always load all nodes, or with loadDataOnDemand:true, will always load all nodes under a given parent. This means that the server does not need to implement special tree filtering logic.

Optionally, serverFilterFields can be set to a list of field names that will be sent to the server whenever they are present in the criteria.

Returns:

Boolean

setLoadDataOnDemand

public void setLoadDataOnDemand(java.lang.Boolean loadDataOnDemand)
                         throws java.lang.IllegalStateException

Does this resultTree load data incrementally as folders within the tree are opened, or is it all loaded in a single request?

Parameters:

loadDataOnDemand - loadDataOnDemand Default value is true

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

See Also:

TreeGrid.setLoadDataOnDemand(java.lang.Boolean)

getLoadDataOnDemand

public java.lang.Boolean getLoadDataOnDemand()

Does this resultTree load data incrementally as folders within the tree are opened, or is it all loaded in a single request?

Returns:

Boolean

See Also:

TreeGrid.getLoadDataOnDemand()

setServerFilterFields

public void setServerFilterFields(java.lang.String... serverFilterFields)
                           throws java.lang.IllegalStateException

When keepParentsOnFilter is enabled, this property lists field names that will be sent to the server if they are present in criteria.

Parameters:

serverFilterFields - . See String. Default value is null

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getServerFilterFields

public java.lang.String[] getServerFilterFields()

When keepParentsOnFilter is enabled, this property lists field names that will be sent to the server if they are present in criteria.

Returns:

. See String

setUpdateCacheFromRequest

public void setUpdateCacheFromRequest(java.lang.Boolean updateCacheFromRequest)
                               throws java.lang.IllegalStateException

When a successful Add, Update or Remove type operation fires on this ResultTree's dataSource, if data is unset, should we integrate the submitted data values (from the request) into our data-set?

Note : This is an advanced setting

Parameters:

updateCacheFromRequest - updateCacheFromRequest Default value is true

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getUpdateCacheFromRequest

public java.lang.Boolean getUpdateCacheFromRequest()

When a successful Add, Update or Remove type operation fires on this ResultTree's dataSource, if data is unset, should we integrate the submitted data values (from the request) into our data-set?

Returns:

Boolean

applyFilter

public Tree applyFilter(Tree tree,
               Criteria criteria,
               TreeFilterMode filterMode,
               DataSource dataSource)

The ResultTree will call applyFilter() when it needs to locally filter the tree using the current filter criteria.

Default behavior is to call Tree.getFilteredTree to obtain a new, filtered tree.

Override this method or Tree.getFilteredTree to implement your own client-side filtering behavior. Note that the original tree should not be affected.

Parameters:

tree - the source tree to be filtered

criteria - the filter criteria

filterMode - mode to use for filtering

dataSource - dataSource for filtering if the Tree does not already have one

Returns:

the filtered tree (copy)

applyFilter

public Tree applyFilter(Tree tree,
               Criteria criteria,
               TreeFilterMode filterMode,
               DataSource dataSource,
               DSRequest requestProperties)

The ResultTree will call applyFilter() when it needs to locally filter the tree using the current filter criteria.

Default behavior is to call Tree.getFilteredTree to obtain a new, filtered tree.

Override this method or Tree.getFilteredTree to implement your own client-side filtering behavior. Note that the original tree should not be affected.

Parameters:

tree - the source tree to be filtered

criteria - the filter criteria

filterMode - mode to use for filtering

dataSource - dataSource for filtering if the Tree does not already have one

requestProperties - Request properties block. This allows developers to specify properties that would impact the filter such as textMatchStyle

Returns:

the filtered tree (copy)

compareCriteria

public int compareCriteria(Criteria newCriteria,
                  Criteria oldCriteria)

Default behavior is to call DataSource.compareCriteria to determine whether new criteria is equivalent to the old criteria (returns 0) or not.

See DataSource.compareCriteria for a full explanation of the default behavior. The CriteriaPolicy used is "dropOnChange".

Override this method or DataSource.compareCriteria to implement your own client-side filtering behavior.

Parameters:

newCriteria - new filter criteria

oldCriteria - old filter criteria

Returns:

0 if the criteria are equivalent, -1 if the criteria are different

See Also:

CriteriaPolicy

compareCriteria

public int compareCriteria(Criteria newCriteria,
                  Criteria oldCriteria,
                  DSRequest requestProperties)

Default behavior is to call DataSource.compareCriteria to determine whether new criteria is equivalent to the old criteria (returns 0) or not.

See DataSource.compareCriteria for a full explanation of the default behavior. The CriteriaPolicy used is "dropOnChange".

Override this method or DataSource.compareCriteria to implement your own client-side filtering behavior.

Parameters:

newCriteria - new filter criteria

oldCriteria - old filter criteria

requestProperties - dataSource request properties

Returns:

0 if the criteria are equivalent, -1 if the criteria are different

See Also:

CriteriaPolicy

dataArrived

public void dataArrived(TreeNode parentNode)

This callback fires whenever the resultTree receives new nodes from the server, after the new nodes have been integrated into the tree.

Parameters:

parentNode - The parentNode for which children were just loaded

getOpenState

public java.lang.String getOpenState()

Returns a snapshot of the current open state of this tree's data as a TreeGridOpenState object.

This object can be passed to ResultTree.setOpenState or TreeGrid.setOpenState to open the same set of folders within the tree's data (assuming the nodes are still present in the data).

Returns:

current open state for the grid.

See Also:

setOpenState(java.lang.String)

invalidateCache

public void invalidateCache()

Manually invalidate this ResultTree's cache.

Generally a ResultTree will observe and incorporate updates to the DataSource that provides it's records, but when this is not possible, invalidateCache() allows manual cache invalidation.

Components bound to this ResultTree will typically re-request the currently visible portion of the dataset, causing the ResultTree to re-fetch data from the server.

setCriteria

public void setCriteria(Criteria newCriteria)

Set the filter criteria to use when fetching rows.

Depending on the result of ResultTree.compareCriteria and setting for fetchMode, setting criteria may cause a trip to the server to get a new set of nodes, or may simply cause already-fetched nodes to be re-filtered according to the new criteria.

For a basic overview on when server fetches are generally performed, see fetchMode. However, this is not the final determination of when server fetches occur. Criteria can be split into local criteria and server criteria by specifying serverFilterFields. Thus, even when using fetchMode:"local" a new server fetch will occur if the server criteria changes. For details on how the criteria is split, see DataSource.splitCriteria.

Note: if criteria is being split to retrieve server criteria portion and the criteria is an AdvancedCriteria, the criteria must consist of a single "and" operator and one or more simple criteria below it. No other logical operators may be used. In other words, the AdvancedCriteria provided must be exactly representable by a simple criteria.

Parameters:

newCriteria - the filter criteria

setOpenState

public void setOpenState(java.lang.String openState)

Reset the set of open folders within this tree's data to match the TreeGridOpenState object passed in.

Used to restore previous state retrieved from the tree by a call to ResultTree.getOpenState.

Parameters:

openState - Object describing the desired set of open folders.. See TreeGridOpenState

See Also:

getOpenState()

unloadChildren

public void unloadChildren(TreeNode node)

Unload the children of a folder, returning the folder to the "unloaded" state.

Overrides:

unloadChildren in class Tree

Parameters:

node - folder in question

willFetchData

public java.lang.Boolean willFetchData(Criteria newCriteria)

Will changing the criteria for this resultTree require fetching new data from the server or can the new criteria be satisfied from data already cached on the client?

This method can be used to determine whether TreeGrid.fetchData or TreeGrid.filterData will cause a server side fetch when passed a certain set of criteria.

Parameters:

newCriteria - new criteria to test.

Returns:

true if server fetch would be required to satisfy new criteria.

setDataSource

public void setDataSource(DataSource dataSource)
                   throws java.lang.IllegalStateException

What DataSource is this resultTree associated with?

Parameters:

dataSource - dataSource Default value is null

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

See Also:

Databinding overview and related methods, DataSource fields Example

getDataSource

public DataSource getDataSource()

What DataSource is this resultTree associated with?

Returns:

DataSource

See Also:

Databinding overview and related methods, DataSource fields Example

setRootNode

public void setRootNode(com.google.gwt.core.client.JavaScriptObject rootNode)
                 throws java.lang.IllegalStateException

This attribute may be used to specify a root value for the parentIdField of this resultTree. This overrides the default rootValue for this tree, allowing a component to navigate a tree starting at a specific node.

May be overridden via treeRootValue for ResultTrees generated by a TreeGrid component.

Parameters:

rootNode - rootNode Default value is null

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getRootNode

public com.google.gwt.core.client.JavaScriptObject getRootNode()

This attribute may be used to specify a root value for the parentIdField of this resultTree. This overrides the default rootValue for this tree, allowing a component to navigate a tree starting at a specific node.

May be overridden via treeRootValue for ResultTrees generated by a TreeGrid component.

Returns:

Object