The Tree class represents a generic tree data structure. A tree has a root
node, which may contain any number of child nodes, which may themselves contain
child nodes, ad infinitum.
This class doesn't expose any UI, but is intended to be used as a data structure or base class for other components. For example, the SmugMug TreeView gallery module extends Tree and provides a TreeView UI.
Tree[config]
[config]
Object
optional
Config options.
[nodes]
Object[] | Tree.Node[]
optional
Array of tree node config
objects or Tree.Node instances to add to this tree at initialization
time.
[rootNode]
Object | Tree.Node
optional
Node to use as the root node of this tree.
_addAttrscfgs
values
lazy
Implementation behind the public addAttrs method.
This method is invoked directly by get if it encounters a scenario in which an attribute's valueFn attempts to obtain the value an attribute in the same group of attributes, which has not yet been added (on demand initialization).
cfgs
Object
An object with attribute name/configuration pairs.
values
Object
An object with attribute name/value pairs, defining the initial values to apply. Values defined in the cfgs argument will be over-written by values in this argument unless defined as read only.
lazy
Boolean
Whether or not to delay the intialization of these attributes until the first call to get/set. Individual attributes can over-ride this behavior by defining a lazyAdd configuration property in their configuration. See addAttr.
_addLazyAttrname
[lazyCfg]
Finishes initializing an attribute which has been lazily added.
_addOutOfOrdername
cfg
Utility method used by get/set to add attributes encountered out of order when calling addAttrs().
For example, if:
this.addAttrs({
foo: {
setter: function() {
// make sure this bar is available when foo is added
this.get("bar");
}
},
bar: {
value: ...
}
});_adoptNodenode
[options]
Moves the specified node and all its children from another tree to this tree.
_aggregateAttrsallAttrs
A helper method, used by _initHierarchyData to aggregate attribute configuration across the instances class hierarchy.
The method will protect the attribute configuration value to protect the statically defined default value in ATTRS if required (if the value is an object literal, array or the attribute configuration has cloneDefaultValue set to shallow or deep).
allAttrs
Array
An array of ATTRS definitions across classes in the hierarchy (subclass first, Base last)
The aggregate set of ATTRS definitions for the instance
_attrCfgHashUtility method to define the attribute hash used to filter/whitelist property mixes for this class for iteration performance reasons.
_baseDestroyInternal destroy implementation for BaseCore
_baseInitInternal initialization implementation for BaseCore
_cloneDefaultValuecfg
This method assumes that the value has already been checked to be an object. Since it's on a critical path, we don't want to re-do the check.
cfg
Object
_composeNodeClassComposes a custom late-bound tree node class (if necessary) based on the
classes specified in this Tree's nodeClass and nodeExtensions
properties.
The composed class is stored in this Tree's _nodeClass property. If
composition wasn't necessary, then _nodeClass will just be a reference to
nodeClass.
_defAttrChangeFne
eventFastPath
Default function for attribute change events.
e
EventFacade
The event object for attribute change events.
eventFastPath
Boolean
Whether or not we're using this as a fast path in the case of no listeners or not
_defInitFne
Default init event handler
e
EventFacade
Event object, with a cfg property which refers to the configuration object passed to the constructor.
_destroyHierarchyDestroys the class hierarchy for this instance by invoking the destructor method on the prototype of each class in the hierarchy.
_filterAdHocAttrsallAttrs
userVals
allAttrs
Object
The set of all attribute configurations for this instance. Attributes will be removed from this set, if they belong to the filtered class, so that by the time all classes are processed, allCfgs will be empty.
userVals
Object
The config object passed in by the user, from which adhoc attrs are to be filtered.
The set of adhoc attributes passed in, in the form of an object with attribute name/configuration pairs.
_fireAttrChangeattrName
subAttrName
currVal
newVal
opts
[cfg]
Utility method to help setup the event payload and fire the attribute change event.
attrName
String
The name of the attribute
subAttrName
String
The full path of the property being changed, if this is a sub-attribute value being change. Otherwise null.
currVal
Any
The current value of the attribute
newVal
Any
The new value of the attribute
opts
Object
Any additional event data to mix into the attribute change event's event facade.
[cfg]
Object
optional
The attribute config stored in State, if already available.
_fireTreeEventname
facade
[options]
Utility method for lazily publishing and firing events.
_getAttrname
Provides the common implementation for the public get method, allowing Attribute hosts to over-ride either method.
See get for argument details.
name
String
The name of the attribute.
The value of the attribute.
_getAttrCfgname
Returns an object with the configuration properties (and value) for the given attribute. If attrName is not provided, returns the configuration properties for all attributes.
name
String
Optional. The attribute name. If not provided, the method will return the configuration for all attributes.
The configuration properties for the given attribute, or all attributes.
_getAttrCfgsReturns an aggregated set of attribute configurations, by traversing the class hierarchy.
The hash of attribute configurations, aggregated across classes in the hierarchy This value is cached the first time the method, or _getClasses, is invoked. Subsequent invocations return the cached value.
_getAttrInitValattr
cfg
initValues
Returns the initial value of the given attribute from either the default configuration provided, or the over-ridden value if it exists in the set of initValues provided and the attribute is not read-only.
The initial value of the attribute.
_getAttrsattrs
Implementation behind the public getAttrs method, to get multiple attribute values.
An object with attribute name/value pairs.
_getClassesReturns the class hierarchy for this object, with BaseCore being the last class in the array.
An array of classes (constructor functions), making up the class hierarchy for this object. This value is cached the first time the method, or _getAttrCfgs, is invoked. Subsequent invocations return the cached value.
_getDefaultNodeIndexparent
node
[options]
Returns the default insertion index that should be used when node is inserted as a child of parent without an explicit index.
The primary purpose of this method is to serve as a hook point for extensions and plugins that need to customize insertion order.
Index at which node should be inserted into parent's
children array.
_getFullTypetype
Returns the fully qualified type, given a short type string. That is, returns "foo:bar" when given "bar" if "foo" is the configured prefix.
NOTE: This method, unlike _getType, does no checking of the value passed in, and is designed to be used with the low level _publish() method, for critical path implementations which need to fast-track publish for performance reasons.
type
String
The short type to prefix
The prefixed type, if a prefix is set, otherwise the type passed in
_getInstanceAttrCfgsallCfgs
A helper method used to isolate the attrs config for this instance to pass to addAttrs,
from the static cached ATTRS for the class.
allCfgs
Object
The set of all attribute configurations for this instance. Attributes will be removed from this set, if they belong to the filtered class, so that by the time all classes are processed, allCfgs will be empty.
The set of attributes to be added for this instance, suitable
for passing through to addAttrs.
_getStateValname
[cfg]
Gets the stored value for the attribute, from either the internal state object, or the state proxy if it exits
The stored value of the attribute
_getTypeIf the instance has a prefix attribute and the event type is not prefixed, the instance prefix is applied to the supplied type.
_hasPotentialSubscribersfullType
fullType
String
The fully prefixed type name
Whether the event has potential subscribers or not
_initAttrHostattrs
values
lazy
Constructor logic for attributes. Initializes the host state, and sets up the inital attributes passed to the constructor.
attrs
Object
The attributes to add during construction (passed through to addAttrs). These can also be defined on the constructor being augmented with Attribute by defining the ATTRS property on the constructor.
values
Object
The initial attribute values to apply (passed through to addAttrs). These are not merged/cloned. The caller is responsible for isolating user provided values if required.
lazy
Boolean
Whether or not to add attributes lazily (passed through to addAttrs).
_initAttributeInitializes AttributeCore
_initAttrsattrs
values
lazy
Utility method to set up initial attributes defined during construction, either through the constructor.ATTRS property, or explicitly passed in.
attrs
Object
The attributes to add during construction (passed through to addAttrs). These can also be defined on the constructor being augmented with Attribute by defining the ATTRS property on the constructor.
values
Object
The initial attribute values to apply (passed through to addAttrs). These are not merged/cloned. The caller is responsible for isolating user provided values if required.
lazy
Boolean
Whether or not to add attributes lazily (passed through to addAttrs).
_initBaseconfig
Internal construction logic for BaseCore.
config
Object
The constructor configuration object
_initHierarchyuserVals
Initializes the class hierarchy for the instance, which includes initializing attributes for each class defined in the class's static ATTRS property and invoking the initializer method on the prototype of each class in the hierarchy.
userVals
Object
Object with configuration property name/value pairs
_initHierarchyDataA helper method used by _getClasses and _getAttrCfgs, which determines both the array of classes and aggregate set of attribute configurations across the class hierarchy for the instance.
_isLazyAttrname
Checks whether or not the attribute is one which has been added lazily and still requires initialization.
name
String
The name of the attribute
true if it's a lazily added attribute, false otherwise.
_monitorwhat
eventType
o
This is the entry point for the event monitoring system. You can monitor 'attach', 'detach', 'fire', and 'publish'. When configured, these events generate an event. click -> click_attach, click_detach, click_publish -- these can be subscribed to like other events to monitor the event system. Inividual published events can have monitoring turned on or off (publish can't be turned off before it it published) by setting the events 'monitor' config.
what
String
'attach', 'detach', 'fire', or 'publish'
eventType
String | CustomEvent
The prefixed name of the event being monitored, or the CustomEvent object.
o
Object
Information about the event interaction, such as fire() args, subscription category, publish config
_normAttrValsvalueHash
Utility method to normalize attribute values. The base implementation simply merges the hash to protect the original.
valueHash
Object
An object with attribute name/value pairs
An object literal with 2 properties - "simple" and "complex", containing simple and complex attribute values respectively keyed by the top level attribute name, or null, if valueHash is falsey.
_parseTypeReturns an array with the detach key (if provided), and the prefixed event name from _getType Y.on('detachcategory| menu:click', fn)
_preInitEventCfgconfig
Handles the special on, after and target properties which allow the user to easily configure on and after listeners as well as bubble targets during construction, prior to init.
config
Object
The user configuration object
_protectAttrsattrs
Utility method to protect an attribute configuration hash, by merging the entire object and the individual attr config objects.
attrs
Object
A hash of attribute to configuration object pairs.
A protected version of the attrs argument.
_publishfullType
etOpts
ceOpts
The low level event publish implementation. It expects all the massaging to have been done
outside of this method. e.g. the type to fullType conversion. It's designed to be a fast
path publish, which can be used by critical code paths to improve performance.
The published event. If called without etOpts or ceOpts, this will
be the default CustomEvent instance, and can be configured independently.
_removeNodeFromParentnode
Removes the specified node from its parent node if it has one.
node
Tree.Node
Node to remove.
_setname
val
[opts]
Allows setting of readOnly/writeOnce attributes. See set for argument details.
A reference to the host object.
_setAttrname
value
[opts]
force
Provides the common implementation for the public set and protected _set methods.
See set for argument details.
A reference to the host object.
_setAttrsattrs
[opts]
Implementation behind the public setAttrs method, to set multiple attribute values.
A reference to the host object.
_setAttrValattrName
subAttrName
prevVal
newVal
[opts]
[attrCfg]
Updates the stored value of the attribute in the privately held State object, if validation and setter passes.
attrName
String
The attribute name.
subAttrName
String
The sub-attribute name, if setting a sub-attribute property ("x.y.z").
prevVal
Any
The currently stored value of the attribute.
newVal
Any
The value which is going to be stored.
[opts]
Object
optional
Optional data providing the circumstances for the change.
[attrCfg]
Object
optional
Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained the config from state.
true if the new attribute value was stored, false if not.
_setStateValname
value
Sets the stored value for the attribute, in either the internal state object, or the state proxy if it exits
name
String
The name of the attribute
value
Any
The value of the attribute
addAttrname
config
lazy
Adds an attribute with the provided configuration to the host object.
The config argument object supports the following properties:
A function, which will return the initial value to set on the attribute. This is useful for cases where the attribute configuration is defined statically, but needs to reference the host instance ("this") to obtain an initial value. If both the value and valueFn properties are defined, the value returned by the valueFn has precedence over the value property, unless it returns undefined, in which case the value property is used.
valueFn can also be set to a string, representing the name of the instance method to be used to retrieve the value.
The writeOnce attribute can also be set to the string "initOnly", in which case the attribute can only be set during initialization (when used with Base, this means it can only be set during construction)
The setter function used to massage or normalize the value passed to the set method for the attribute. The value returned by the setter will be the final stored value. Returning Attribute.INVALID_VALUE, from the setter will prevent the value from being stored.
setter can also be set to a string, representing the name of the instance method to be used as the setter function.
The getter function used to massage or normalize the value returned by the get method for the attribute. The value returned by the getter function is the value which will be returned to the user when they invoke get.
getter can also be set to a string, representing the name of the instance method to be used as the getter function.
The validator function invoked prior to setting the stored value. Returning false from the validator function will prevent the value from being stored.
validator can also be set to a string, representing the name of the instance method to be used as the validator function.
The setter, getter and validator are invoked with the value and name passed in as the first and second arguments, and with the context ("this") set to the host object.
Configuration properties outside of the list mentioned above are considered private properties used internally by attribute, and are not intended for public use.
name
String
The name of the attribute.
config
Object
An object with attribute configuration property/value pairs, specifying the configuration for the attribute.
NOTE: The configuration object is modified when adding an attribute, so if you need to protect the original values, you will need to merge the object.
lazy
Boolean
(optional) Whether or not to add this attribute lazily (on the first call to get/set).
A reference to the host object.
addAttrscfgs
values
lazy
Configures a group of attributes, and sets initial values.
NOTE: This method does not isolate the configuration object by merging/cloning. The caller is responsible for merging/cloning the configuration object if required.
cfgs
Object
An object with attribute name/configuration pairs.
values
Object
An object with attribute name/value pairs, defining the initial values to apply. Values defined in the cfgs argument will be over-written by values in this argument unless defined as read only.
lazy
Boolean
Whether or not to delay the intialization of these attributes until the first call to get/set. Individual attributes can over-ride this behavior by defining a lazyAdd configuration property in their configuration. See addAttr.
A reference to the host object.
addTargeto
Registers another EventTarget as a bubble target. Bubble order is determined by the order registered. Multiple targets can be specified.
Events can only bubble if emitFacade is true.
Included in the event-custom-complex submodule.
o
EventTarget
the target to add
aftertype
fn
[context]
[arg*]
Subscribe to a custom event hosted by this object. The supplied callback will execute after any listeners add via the subscribe method, and after the default function, if configured for the event, has executed.
A subscription handle capable of detaching the subscription
appendNodeparent
node
[options]
Appends a node or array of nodes as the last child of the specified parent node.
If a node being appended is from another tree, it and all its children will be removed from that tree and moved to this one.
parent
Tree.Node
Parent node.
node
Object | Object[] | Tree.Node | Tree.Node[]
Child node, node config object, array of child nodes, or array of node config objects to append to the given parent. Node config objects will automatically be converted into node instances.
[options]
Object
optional
Options.
[silent=false]
Boolean
optional
If true, the add event will
be suppressed.
Node or array of nodes that were appended.
attrAddedname
Checks if the given attribute has been added to the host
name
String
The name of the attribute to check.
true if an attribute with the given name has been added, false if it hasn't. This method will return true for lazily added attributes.
beforeExecutes the callback before a DOM event, custom event or method. If the first argument is a function, it is assumed the target is a method. For DOM and custom events, this is an alias for Y.on.
For DOM and custom events: type, callback, context, 0-n arguments
For methods: callback, object (method host), methodName, context, 0-n arguments
detach handle
bubbleevt
Propagate an event. Requires the event-custom-complex module.
evt
CustomEvent
the custom event to propagate
the aggregated return value from Event.Custom.fire
clear[rootNode]
[options]
Clears this tree by destroying the root node and all its children. If a
rootNode argument is provided, that node will become the root node of this
tree; otherwise, a new root node will be created.
[rootNode]
Object | Tree.Node
optional
If specified, this node will be used as the new root node.
[options]
Object
optional
Options.
[silent=false]
Boolean
optional
If true, the clear event
will be suppressed.
[src]
String
optional
Source of the change, to be passed along to the event facade of the resulting event. This can be used to distinguish between changes triggered by a user and changes triggered programmatically, for example.
createNode[config]
Creates and returns a new Tree.Node instance associated with (but not
yet appended to) this tree.
New node, or null if a node could not be created
from the given config.
destroyDestroy lifecycle method. Invokes destructors for the class hierarchy.
A reference to this object
destroyNodenode
[options]
Removes and destroys a node and all its child nodes. Once destroyed, a node is eligible for garbage collection and cannot be reused or re-added to the tree.
node
Tree.Node
Node to destroy.
[options]
Object
optional
Options.
[silent=false]
Boolean
optional
If true, remove events will
be suppressed.
[src]
String
optional
Source of the change, to be passed along to the event facade of the resulting events. This can be used to distinguish between changes triggered by a user and changes triggered programmatically, for example.
detachtype
fn
context
Detach one or more listeners the from the specified event
type
String | Object
Either the handle to the subscriber or the type of event. If the type is not specified, it will attempt to remove the listener from all hosted events.
fn
Function
The subscribed function to unsubscribe, if not supplied, all subscribers will be removed.
context
Object
The custom object passed to subscribe. This is optional, but if supplied will be used to disambiguate multiple listeners that are the same (e.g., you subscribe many object using a function that lives on the prototype)
the host
detachAlltype
Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.
type
String
The type, or name of the event
emptyNodenode
[options]
Removes all children from the specified node. The removed children will
still be reusable unless the destroy option is truthy.
node
Tree.Node
Node to empty.
[options]
Object
optional
Options.
[destroy=false]
Boolean
optional
If true, the children will
also be destroyed, which makes them available for garbage collection
and means they can't be reused.
[silent=false]
Boolean
optional
If true, remove events will
be suppressed.
[src]
String
optional
Source of the change, to be passed along to the event facade of the resulting events. This can be used to distinguish between changes triggered by a user and changes triggered programmatically, for example.
Array of removed child nodes.
findNodenode
[options]
callback
[thisObj]
Performs a depth-first traversal of node, passing it and each of its descendants to the specified callback, and returning the first node for which the callback returns a truthy value.
Traversal will stop as soon as a truthy value is returned from the callback.
See traverseNode() for more details on how depth-first traversal works.
node
Tree.Node
Node to traverse.
[options]
Object
optional
Options.
[depth]
Number
optional
Depth limit. If specified, descendants will only be traversed to this depth before backtracking and moving on.
callback
Function
Callback function to call with the traversed node and each of its descendants. If this function returns a truthy value, traversal will be stopped and the current node will be returned.
node
Tree.Node
Node being traversed.
[thisObj]
Object
optional
this object to use when executing callback.
Returns the first node for which the callback
returns a truthy value, or null if the callback never returns a truthy
value.
firetype
arguments
Fire a custom event by name. The callback functions will be executed from the context specified when the event was created, and with the following parameters.
The first argument is the event type, and any additional arguments are passed to the listeners as parameters. If the first of these is an object literal, and the event is configured to emit an event facade, that object is mixed into the event facade and the facade is provided in place of the original object.
If the custom event object hasn't been created, then the event hasn't been published and it has no subscribers. For performance sake, we immediate exit in this case. This means the event won't bubble, so if the intention is that a bubble target be notified, the event must be published on this object first.
type
String | Object
The type of the event, or an object that contains a 'type' property.
arguments
Object*
an arbitrary set of parameters to pass to the handler. If the first of these is an object literal and the event is configured to emit an event facade, the event facade will replace that parameter after the properties the object literal contains are copied to the event facade.
True if the whole lifecycle of the event went through, false if at any point the event propagation was halted.
getname
Returns the current value of the attribute. If the attribute has been configured with a 'getter' function, this method will delegate to the 'getter' to obtain the value of the attribute.
name
String
The name of the attribute. If the value of the attribute is an Object,
dot notation can be used to obtain the value of a property of the object (e.g. get("x.y.z"))
The value of the attribute
getAttrsattrs
Gets multiple attribute values.
An object with attribute name/value pairs.
getEventtype
prefixed
Returns the custom event of the provided type has been created, a falsy value otherwise
the custom event or null
getNodeByIdid
Returns the tree node with the specified id, or undefined if the node
doesn't exist in this tree.
id
String
Node id.
Node, or undefined if not found.
getTargetsReturns an array of bubble targets for this object.
EventTarget[]
initcfg
Init lifecycle method, invoked during construction. Sets up attributes and invokes initializers for the class hierarchy.
cfg
Object
Object with configuration property name/value pairs
A reference to this object
insertNodeparent
node
[options]
Inserts a node or array of nodes at the specified index under the given parent node, or appends them to the parent if no index is specified.
If a node being inserted is from another tree, it and all its children will be removed from that tree and moved to this one.
parent
Tree.Node
Parent node.
node
Object | Object[] | Tree.Node | Tree.Node[]
Child node, node config object, array of child nodes, or array of node config objects to insert under the given parent. Node config objects will automatically be converted into node instances.
[options]
Object
optional
Options.
[index]
Number
optional
Index at which to insert the child node. If not specified, the node will be appended as the last child of the parent.
[silent=false]
Boolean
optional
If true, the add event will
be suppressed.
[src='insert']
String
optional
Source of the change, to be passed along to the event facade of the resulting event. This can be used to distinguish between changes triggered by a user and changes triggered programmatically, for example.
Node or array of nodes that were inserted.
modifyAttrname
config
Updates the configuration of an attribute which has already been added.
The properties which can be modified through this interface are limited to the following subset of attributes, which can be safely modified after a value has already been set on the attribute:
Note: New attributes cannot be added using this interface. New attributes must be added using addAttr, or an appropriate manner for a class which utilises Attributes (e.g. the ATTRS property in Base).
ontype
fn
[context]
[arg*]
Subscribe a callback function to a custom event fired by this object or from an object that bubbles its events to this object.
Callback functions for events published with emitFacade = true will
receive an EventFacade as the first argument (typically named "e").
These callbacks can then call e.preventDefault() to disable the
behavior published to that event's defaultFn. See the EventFacade
API for all available properties and methods. Subscribers to
non-emitFacade events will receive the arguments passed to fire()
after the event name.
To subscribe to multiple events at once, pass an object as the first argument, where the key:value pairs correspond to the eventName:callback, or pass an array of event names as the first argument to subscribe to all listed events with the same callback.
Returning false from a callback is supported as an alternative to
calling e.preventDefault(); e.stopPropagation();. However, it is
recommended to use the event methods whenever possible.
A subscription handle capable of detaching that subscription
oncetype
fn
[context]
[arg*]
Listen to a custom event hosted by this object one time.
This is the equivalent to on except the
listener is immediatelly detached when it is executed.
A subscription handle capable of detaching the subscription
onceAftertype
fn
[context]
[arg*]
Listen to a custom event hosted by this object one time.
This is the equivalent to after except the
listener is immediatelly detached when it is executed.
A subscription handle capable of detaching that subscription
parseTypetype
[pre]
Takes the type parameter passed to 'on' and parses out the various pieces that could be included in the type. If the event type is passed without a prefix, it will be expanded to include the prefix one is supplied or the event target is configured with a default prefix.
an array containing:
prependNodeparent
node
[options]
Prepends a node or array of nodes at the beginning of the specified parent node.
If a node being prepended is from another tree, it and all its children will be removed from that tree and moved to this one.
parent
Tree.Node
Parent node.
node
Object | Object[] | Tree.Node | Tree.Node[]
Child node, node config object, array of child nodes, or array of node config objects to prepend to the given parent. Node config objects will automatically be converted into node instances.
[options]
Object
optional
Options.
[silent=false]
Boolean
optional
If true, the add event will
be suppressed.
Node or array of nodes that were prepended.
publishtype
opts
Creates a new custom event of the specified type. If a custom event by that name already exists, it will not be re-created. In either case the custom event is returned.
type
String
the type, or name of the event
opts
Object
optional config params. Valid properties are:
the custom event
removeAttrname
Removes an attribute from the host object
name
String
The name of the attribute to be removed.
removeNodenode
[options]
Removes the specified node from its parent node. The removed node will still
be reusable unless the destroy option is truthy.
node
Tree.Node
Node to remove.
[options]
Object
optional
Options.
[destroy=false]
Boolean
optional
If true, the node and all its
children will also be destroyed, which makes them available for
garbage collection and means they can't be reused.
[silent=false]
Boolean
optional
If true, the remove event
will be suppressed.
[src]
String
optional
Source of the change, to be passed along to the event facade of the resulting event. This can be used to distinguish between changes triggered by a user and changes triggered programmatically, for example.
Node that was removed.
resetname
Resets the attribute (or all attributes) to its initial value, as long as the attribute is not readOnly, or writeOnce.
name
String
Optional. The name of the attribute to reset. If omitted, all attributes are reset.
A reference to the host object.
setname
value
[opts]
Sets the value of an attribute.
name
String
The name of the attribute. If the
current value of the attribute is an Object, dot notation can be used
to set the value of a property within the object (e.g. set("x.y.z", 5)).
value
Any
The value to set the attribute to.
[opts]
Object
optional
Optional data providing the circumstances for the change.
A reference to the host object.
setAttrsattrs
[opts]
Sets multiple attribute values.
A reference to the host object.
sizeReturns the total number of nodes in this tree, at all levels.
Use rootNode.children.length to get only the number of top-level nodes.
Total number of nodes in this tree.
subscribesubscribe to an event
toJSONSerializes this tree to an object suitable for use in JSON.
Serialized tree object.
toStringDefault toString implementation. Provides the constructor NAME and the instance guid, if set.
String representation for this object
traverseNodenode
[options]
callback
[thisObj]
Performs a depth-first traversal of node, passing it and each of its descendants to the specified callback.
If the callback function returns Tree.STOP_TRAVERSAL, traversal will be
stopped immediately. Otherwise, it will continue until the deepest
descendant of node has been traversed, or until each branch has been
traversed to the optional maximum depth limit.
Since traversal is depth-first, that means nodes are traversed like this:
1
/ | \
2 8 9
/ \ \
3 7 10
/ | \ / \
4 5 6 11 12node
Tree.Node
Node to traverse.
[options]
Object
optional
Options.
[depth]
Number
optional
Depth limit. If specified, descendants will only be traversed to this depth before backtracking and moving on.
callback
Function
Callback function to call with the traversed node and each of its descendants.
node
Tree.Node
Node being traversed.
[thisObj]
Object
optional
this object to use when executing callback.
Returns Tree.STOP_TRAVERSAL if traversal was stopped;
otherwise returns undefined.
unsubscribedetach a listener
unsubscribeAlltype
Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.
type
String
The type, or name of the event
_allowAdHocAttrsThis property controls whether or not instances of this class should allow users to add ad-hoc attributes through the constructor configuration hash.
AdHoc attributes are attributes which are not defined by the class, and are not handled by the MyClass._NON_ATTRS_CFG
Default: undefined (false)
_nodeClassComposed node class based on nodeClass that mixes in any extensions
specified in nodeExtensions. If there are no extensions, this will just be
a reference to nodeClass.
childrenReference to the children array of this Tree's rootNode.
This is a convenience property to allow you to type tree.children instead
of tree.rootNode.children.
nodeClassThe Tree.Node class or subclass that should be used for nodes created by
this tree.
You may specify an actual class reference or a string that resolves to a class reference at runtime.
Default: Y.Tree.Node
nodeExtensionsOptional array containing one or more extension classes that should be mixed
into the nodeClass when this Tree is instantiated. The resulting composed
node class will be unique to this Tree instance and will not affect any
other instances, nor will it modify the defined nodeClass itself.
This provides a late-binding extension mechanism for nodes that doesn't
require them to extend Y.Base, which would incur a significant performance
hit.
Default: []
STOP_TRAVERSALReturn this value from a Tree#traverseNode() or Tree.Node#traverse()
callback to immediately stop traversal.
destroyedFlag indicating whether or not this object has been through the destroy lifecycle phase.
Default: false
destroyedChange
Fires when the value for the configuration attribute destroyed is
changed. You can listen for the event using the on method if you
wish to be notified before the attribute's value has changed, or
using the after method if you wish to be notified after the
attribute's value has changed.
e
EventFacade
initializedFlag indicating whether or not this object has been through the init lifecycle phase.
Default: false
initializedChange
Fires when the value for the configuration attribute initialized is
changed. You can listen for the event using the on method if you
wish to be notified before the attribute's value has changed, or
using the after method if you wish to be notified after the
attribute's value has changed.
e
EventFacade
addFired when a node is added to this Tree. The src property will indicate
how the node was added ("append", "insert", "prepend", etc.).
clearFired when this Tree is cleared.
destroyLifecycle event for the destroy phase, fired prior to destruction. Invoking the preventDefault method on the event object provided to subscribers will prevent destruction from proceeding.
Subscribers to the "after" moment of this event, will be notified after destruction is complete (and as a result cannot prevent destruction).
e
EventFacade
Event object
initLifecycle event for the init phase, fired prior to initialization. Invoking the preventDefault() method on the event object provided to subscribers will prevent initialization from occuring.
Subscribers to the "after" momemt of this event, will be notified after initialization of the object is complete (and therefore cannot prevent initialization).
e
EventFacade
Event object, with a cfg property which refers to the configuration object passed to the constructor.