Version 3.17.2

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ChartLegend Class

Extends Widget
Module: charts-legend
Parent Module: charts

ChartLegend provides a legend for a chart.

Item Index

Methods

Methods

_addAttrs

(
  • cfgs
  • values
  • lazy
)
private

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).

Parameters:

  • 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.

_addLazyAttr

(
  • name
  • [lazyCfg]
)
private

Finishes initializing an attribute which has been lazily added.

Parameters:

  • name Object

    The name of the attribute

  • [lazyCfg] Object optional

    Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained lazy config from state.

_addOutOfOrder

(
  • name
  • cfg
)
private

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: ...
 }
});

Parameters:

  • name String

    attribute name

  • cfg Object

    attribute configuration

_afterChildSelectedChange

(
  • event
)
protected

Default attribute change listener for the selected attribute, responsible for updating the UI, in response to attribute changes.

Parameters:

  • event EventFacade

    The event facade for the attribute change.

_aggregateAttrs

(
  • allAttrs
)
Object private

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).

Parameters:

  • allAttrs Array

    An array of ATTRS definitions across classes in the hierarchy (subclass first, Base last)

Returns:

Object :

The aggregate set of ATTRS definitions for the instance

_applyParsedConfig

() Object protected

Returns:

Object :

The merged configuration literal

_applyParser

(
  • config
)
protected

Utility method used to apply the HTML_PARSER configuration for the instance, to retrieve config data values.

Parameters:

  • config Object

    User configuration object (will be populated with values from Node)

_attrCfgHash

() private

Utility method to define the attribute hash used to filter/whitelist property mixes for this class for iteration performance reasons.

_baseDestroy

() private

Internal destroy implementation for BaseCore

_baseInit

() private

Internal initialization implementation for BaseCore

_bindAttrUI

(
  • attrs
)
private

Binds after listeners for the list of attributes provided

Parameters:

_bindDOM

() protected

Sets up DOM listeners, on elements rendered by the widget.

_bindUI

() protected

Sets up DOM and CustomEvent listeners for the widget.

_bindUIChild

() protected

Binds event listeners responsible for updating the UI state in response to WidgetChild related state changes.

This method is invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

_cloneDefaultValue

(
  • cfg
)
private

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.

Parameters:

_createUIEvent

(
  • type
)
private

Binds a delegated DOM event listener of the specified type to the Widget's outtermost DOM element to facilitate the firing of a Custom Event of the same type for the Widget instance.

Parameters:

  • type String

    String representing the name of the event

_defAttrChangeFn

(
  • e
  • eventFastPath
)
private

Default function for attribute change events.

Parameters:

  • 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

_defaultBB

() protected

Returns the default value for the boundingBox attribute.

For the Widget class, this will most commonly be null (resulting in a new boundingBox node instance being created), unless a srcNode was provided and CONTENT_TEMPLATE is null, in which case it will be srcNode. This behavior was introduced in @VERSION@ to accomodate single-box widgets whose BB & CB both point to srcNode (e.g. Y.Button).

_defaultCB

() protected

Returns the default value for the contentBox attribute.

For the Widget class, this will be the srcNode if provided, otherwise null (resulting in a new contentBox node instance being created)

_defDestroyFn

(
  • e
)
protected

Default destroy event handler

Parameters:

_defInitFn

(
  • e
)
protected

Default init event handler

Parameters:

  • e EventFacade

    Event object, with a cfg property which refers to the configuration object passed to the constructor.

_defRenderFn

(
  • e
  • parentNode
)
protected

Default render handler

Parameters:

  • e EventFacade

    The Event object

  • parentNode Node

    The parent node to render to, if passed in to the render method

_destroyBox

() protected

Removes and destroys the widgets rendered boundingBox, contentBox, and detaches bound UI events.

_destroyHierarchy

() private

Destroys the class hierarchy for this instance by invoking the destructor method on the prototype of each class in the hierarchy.

_destroyLegendItems

() private

Destroys legend items.

_destroyUIEvents

() private

Destructor logic for UI event infrastructure, invoked during Widget destruction.

_drawLegend

() private

Draws the legend

_filterAdHocAttrs

(
  • allAttrs
  • userVals
)
Object private

Parameters:

  • 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.

Returns:

Object :

The set of adhoc attributes passed in, in the form of an object with attribute name/configuration pairs.

_filterUIEvent

(
  • evt
)
Boolean private

This method is used to determine if we should fire the UI Event or not. The default implementation makes sure that for nested delegates (nested unrelated widgets), we don't fire the UI event listener more than once at each level.

For example, without the additional filter, if you have nested widgets, each widget will have a delegate listener. If you click on the inner widget, the inner delegate listener's filter will match once, but the outer will match twice (based on delegate's design) - once for the inner widget, and once for the outer.

Parameters:

Returns:

Boolean :

true if it's OK to fire the custom UI event, false if not.

_fireAttrChange

(
  • attrName
  • subAttrName
  • currVal
  • newVal
  • opts
  • [cfg]
)
private

Utility method to help setup the event payload and fire the attribute change event.

Parameters:

  • 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.

_getAttr

(
  • name
)
Any protected chainable

Provides the common implementation for the public get method, allowing Attribute hosts to over-ride either method.

See get for argument details.

Parameters:

  • name String

    The name of the attribute.

Returns:

Any:

The value of the attribute.

_getAttrCfg

(
  • name
)
Object protected

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.

Parameters:

  • name String

    Optional. The attribute name. If not provided, the method will return the configuration for all attributes.

Returns:

Object :

The configuration properties for the given attribute, or all attributes.

_getAttrCfgs

() Object protected

Returns an aggregated set of attribute configurations, by traversing the class hierarchy.

Returns:

Object :

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.

_getAttrInitVal

(
  • attr
  • cfg
  • initValues
)
Any private

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.

Parameters:

  • attr String

    The name of the attribute

  • cfg Object

    The attribute configuration object

  • initValues Object

    The object with simple and complex attribute name/value pairs returned from _normAttrVals

Returns:

Any:

The initial value of the attribute.

_getAttrs

(
  • attrs
)
Object protected

Implementation behind the public getAttrs method, to get multiple attribute values.

Parameters:

  • attrs String[] | Boolean

    Optional. An array of attribute names. If omitted, all attribute values are returned. If set to true, all attributes modified from their initial values are returned.

Returns:

Object :

An object with attribute name/value pairs.

_getClasses

() Function[] protected

Returns the class hierarchy for this object, with BaseCore being the last class in the array.

Returns:

Function[] :

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.

_getDefaultStyles

() protected

Returns the default hash for the styles attribute.

Returns:

Object

_getFullType

(
  • type
)
String private

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.

Parameters:

  • type String

    The short type to prefix

Returns:

String :

The prefixed type, if a prefix is set, otherwise the type passed in

_getHtmlParser

() Object private

Gets the HTML_PARSER definition for this instance, by merging HTML_PARSER definitions across the class hierarchy.

Returns:

Object :

HTML_PARSER definition for this instance

_getInstanceAttrCfgs

(
  • allCfgs
)
Object private

A helper method used to isolate the attrs config for this instance to pass to addAttrs, from the static cached ATTRS for the class.

Parameters:

  • 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.

Returns:

Object :

The set of attributes to be added for this instance, suitable for passing through to addAttrs.

_getLegendItem

(
  • shapeProps
  • shapeClass
  • fill
  • border
  • labelStyles
  • width
  • height
  • text
)
private

Returns a legend item consisting of the following properties:

node
The Node containing the legend item elements.
shape
The Shape element for the legend item.
textNode
The Node containing the text>
text

Parameters:

  • shapeProps Node

    Reference to the node attribute.

  • shapeClass String | Class

    The type of shape

  • fill Object

    Properties for the shape's fill

  • border Object

    Properties for the shape's border

  • labelStyles String

    String to be rendered as the legend's text

  • width Number

    Total width of the legend item

  • height Number

    Total height of the legend item

  • text String

    Text for the legendItem

Returns:

Object

_getNodeToParse

() Node private

Determines whether we have a node reference which we should try and parse.

The current implementation does not parse nodes generated from CONTENT_TEMPLATE, only explicitly set srcNode, or contentBox attributes.

Returns:

Node :

The node reference to apply HTML_PARSER to.

_getPlotDefaults

() protected

Gets the default values for series that use the utility. This method is used by the class' styles attribute's getter to get build default values.

Returns:

Object

_getShapeClass

() private

Evaluates and returns correct class for drawing a shape.

Returns:

Shape

_getSrcNode

() Node protected

Returns:

Node :

The Node to apply HTML_PARSER to

_getStateVal

(
  • name
  • [cfg]
)
Any private

Gets the stored value for the attribute, from either the internal state object, or the state proxy if it exits

Parameters:

  • name String

    The name of the attribute

  • [cfg] 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.

Returns:

Any:

The stored value of the attribute

_getStylesBySeriesType

(
  • The
)
private

Retrieves the marker styles based on the type of series. For series that contain a marker, the marker styles are returned.

Parameters:

Returns:

Object An object containing fill, border and shape information.

_getType

() private

If the instance has a prefix attribute and the event type is not prefixed, the instance prefix is applied to the supplied type.

_getUIEventNode

() protected

Inherited from Widget but overwritten in widget-child/js/Widget-Child.js:167

Returns the node on which to bind delegate listeners.

Override of Widget's implementation of _getUIEventNode() to ensure that all event listeners are bound to the Widget's topmost DOM element. This ensures that the firing of each type of Widget UI event (click, mousedown, etc.) is facilitated by a single, top-level, delegated DOM event listener.

_guid

() protected

_handleSizeChange

(
  • e
)
private

Updates the legend when the size changes.

Parameters:

_hasPotentialSubscribers

(
  • fullType
)
Boolean private

Parameters:

  • fullType String

    The fully prefixed type name

Returns:

Boolean :

Whether the event has potential subscribers or not

_initAttrHost

(
  • attrs
  • values
  • lazy
)
private

Constructor logic for attributes. Initializes the host state, and sets up the inital attributes passed to the constructor.

Parameters:

  • 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).

_initAttribute

() private

Inherited from BaseObservable but overwritten in base/js/BaseCore.js:309

Initializes AttributeCore

_initAttrs

(
  • attrs
  • values
  • lazy
)
protected

Utility method to set up initial attributes defined during construction, either through the constructor.ATTRS property, or explicitly passed in.

Parameters:

  • 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).

_initBase

(
  • config
)
private

Internal construction logic for BaseCore.

Parameters:

  • config Object

    The constructor configuration object

_initHierarchy

(
  • userVals
)
private

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.

Parameters:

  • userVals Object

    Object with configuration property name/value pairs

_initHierarchyData

() private

A 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.

_initUIEvent

(
  • type
)
String private

Sets up infrastructure required to fire a UI event.

Parameters:

  • type String

    String representing the name of the event

Returns:

String :

_isLazyAttr

(
  • name
)
Boolean private

Checks whether or not the attribute is one which has been added lazily and still requires initialization.

Parameters:

  • name String

    The name of the attribute

Returns:

Boolean :

true if it's a lazily added attribute, false otherwise.

_isUIEvent

(
  • type
)
String private

Determines if the specified event is a UI event.

Parameters:

  • type String

    String representing the name of the event

Returns:

String :

Event Returns the name of the UI Event, otherwise undefined.

_mapInstance

(
  • The
)
protected

Utility method used to add an entry to the boundingBox id to instance map.

This method can be used to populate the instance with lazily created boundingBox Node references.

Parameters:

_monitor

(
  • what
  • eventType
  • o
)
private

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.

Parameters:

  • 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

_normAttrVals

(
  • valueHash
)
Object private

Utility method to normalize attribute values. The base implementation simply merges the hash to protect the original.

Parameters:

  • valueHash Object

    An object with attribute name/value pairs

Returns:

Object :

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.

_onDocFocus

(
  • evt
)
protected

DOM focus event handler, used to sync the state of the Widget with the DOM

Parameters:

  • evt EventFacade

    The event facade for the DOM focus event

_onDocMouseDown

(
  • evt
)
protected

"mousedown" event handler for the owner document of the widget's bounding box.

Parameters:

  • evt EventFacade

    The event facade for the DOM focus event

_parseType

() private

Returns an array with the detach key (if provided), and the prefixed event name from _getType Y.on('detachcategory| menu:click', fn)

_positionChangeHandler

(
  • e
)
private

Handles position changes.

Parameters:

_preAddAttrs

(
  • attrs
  • userVals
  • lazy
)
protected

Implement the BaseCore _preAddAttrs method hook, to add the srcNode and related attributes, so that HTML_PARSER (which relies on this.get("srcNode")) can merge in it's results before the rest of the attributes are added.

Parameters:

  • attrs Object

    The full hash of statically defined ATTRS attributes being added for this instance

  • userVals Object

    The hash of user values passed to the constructor

  • lazy Boolean

    Whether or not to add the attributes lazily

_preInitEventCfg

(
  • config
)
private

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.

Parameters:

  • config Object

    The user configuration object

_protectAttrs

(
  • attrs
)
Object deprecated protected

Inherited from AttributeCore: attribute/js/AttributeCore.js:901

Deprecated: Use `AttributeCore.protectAttrs()` or `Attribute.protectAttrs()` which are the same static utility method.

Utility method to protect an attribute configuration hash, by merging the entire object and the individual attr config objects.

Parameters:

  • attrs Object

    A hash of attribute to configuration object pairs.

Returns:

Object :

A protected version of the attrs argument.

_publish

(
  • fullType
  • etOpts
  • ceOpts
)
CustomEvent private

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.

Parameters:

  • fullType String

    The prefixed type of the event to publish.

  • etOpts Object

    The EventTarget specific configuration to mix into the published event.

  • ceOpts Object

    The publish specific configuration to mix into the published event.

Returns:

CustomEvent :

The published event. If called without etOpts or ceOpts, this will be the default CustomEvent instance, and can be configured independently.

_removeLoadingClassNames

() protected

Removes class names representative of the widget's loading state from the boundingBox.

_renderBox

(
  • parentNode
)
private

Helper method to collect the boundingBox and contentBox and append to the provided parentNode, if not already a child. The owner document of the boundingBox, or the owner document of the contentBox will be used as the document into which the Widget is rendered if a parentNode is node is not provided. If both the boundingBox and the contentBox are not currently in the document, and no parentNode is provided, the widget will be rendered to the current document's body.

Parameters:

  • parentNode Node

    The parentNode to render the widget to. If not provided, and both the boundingBox and the contentBox are not currently in the document, the widget will be rendered to the current document's body.

_renderBoxClassNames

() protected

Applies standard class names to the boundingBox and contentBox

_renderUI

() protected

Initializes the UI state for the Widget's bounding/content boxes.

_set

(
  • name
  • val
  • [opts]
)
Object protected chainable

Allows setting of readOnly/writeOnce attributes. See set for argument details.

Parameters:

  • name String

    The name of the attribute.

  • val Any

    The value to set the attribute to.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

Returns:

Object :

A reference to the host object.

_setAttr

(
  • name
  • value
  • [opts]
  • force
)
Object protected chainable

Provides the common implementation for the public set and protected _set methods.

See set for argument details.

Parameters:

  • name String

    The name of the attribute.

  • value Any

    The value to set the attribute to.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

  • force Boolean

    If true, allows the caller to set values for readOnly or writeOnce attributes which have already been set.

Returns:

Object :

A reference to the host object.

_setAttrs

(
  • attrs
  • [opts]
)
Object protected chainable

Implementation behind the public setAttrs method, to set multiple attribute values.

Parameters:

  • attrs Object

    An object with attributes name/value pairs.

  • [opts] Object optional

    Optional data providing the circumstances for the change

Returns:

Object :

A reference to the host object.

_setAttrUI

(
  • e
)
private

Parameters:

_setAttrVal

(
  • attrName
  • subAttrName
  • prevVal
  • newVal
  • [opts]
  • [attrCfg]
)
Boolean private

Updates the stored value of the attribute in the privately held State object, if validation and setter passes.

Parameters:

  • 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.

Returns:

Boolean :

true if the new attribute value was stored, false if not.

_setBB

(
  • node
)
private

Setter for the boundingBox attribute

Parameters:

Returns:

Node

_setBox

(
  • id
  • node
  • template
  • isBounding
)
Node private

Helper method to set the bounding/content box, or create it from the provided template if not found.

Parameters:

  • id String

    The node's id attribute

  • node Node | String

    The node reference

  • template String

    HTML string template for the node

  • isBounding Boolean

    true if this is the boundingBox, false if it's the contentBox

Returns:

Node :

The node

_setCB

(
  • node
)
private

Setter for the contentBox attribute

Parameters:

Returns:

Node

_setStateVal

(
  • name
  • value
)
private

Sets the stored value for the attribute, in either the internal state object, or the state proxy if it exits

Parameters:

  • name String

    The name of the attribute

  • value Any

    The value of the attribute

_strSetter

(
  • strings
)
String protected

The default setter for the strings attribute. Merges partial sets into the full string set, to allow users to partial sets of strings

Parameters:

Returns:

String :

The full set of strings to set

_syncAttrUI

(
  • attrs
)
private

Invokes the _uiSet=ATTR NAME> method for the list of attributes provided

Parameters:

_syncUI

() protected

Updates the widget UI to reflect the attribute state.

_syncUIChild

() protected

Synchronizes the UI to match the WidgetChild state.

This method is invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

_uiSetChildSelected

(
  • selected
)
protected

Updates the UI to reflect the selected attribute value.

Parameters:

  • selected Number

    The selected value to be reflected in the UI.

_uiSetDim

(
  • dim
  • val
)
private

Parameters:

_uiSetDisabled

(
  • val
)
protected

Sets the disabled state for the UI

Parameters:

_uiSetFocused

(
  • val
  • src
)
protected

Sets the focused state for the UI

Parameters:

  • val Boolean
  • src String

    String representing the source that triggered an update to the UI.

_uiSetHeight

(
  • val
)
protected

Sets the height on the widget's bounding box element

Parameters:

_uiSetTabIndex

(
  • Number
)
protected

Set the tabIndex on the widget's rendered UI

Parameters:

_uiSetVisible

(
  • val
)
protected

Sets the visible state for the UI

Parameters:

_uiSetWidth

(
  • val
)
protected

Sets the width on the widget's bounding box element

Parameters:

_uiSizeCB

(
  • expand
)
protected

Parameters:

_unbindDOM

() protected

_unbindUI

() protected

_updateBackground

(
  • styles
)
private

Updates the background for the legend.

Parameters:

  • styles Object

    Reference to the legend's styles attribute

_updateHandler

(
  • e
)
private

Handles changes to legend.

Parameters:

_validTabIndex

(
  • tabIndex
)
protected

Parameters:

addAttr

(
  • name
  • config
  • lazy
)
Object chainable

Adds an attribute with the provided configuration to the host object.

The config argument object supports the following properties:

value <Any>
The initial value to set on the attribute
valueFn <Function | String>

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.

readOnly <boolean>
Whether or not the attribute is read only. Attributes having readOnly set to true cannot be modified by invoking the set method.
writeOnce <boolean> or <string>
Whether or not the attribute is "write once". Attributes having writeOnce set to true, can only have their values set once, be it through the default configuration, constructor configuration arguments, or by invoking set.

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)

setter <Function | String>

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.

getter <Function | String>

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.

validator <Function | String>

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.

lazyAdd <boolean>
Whether or not to delay initialization of the attribute until the first call to get/set it. This flag can be used to over-ride lazy initialization on a per attribute basis, when adding multiple attributes through the addAttrs method.

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.

Parameters:

  • 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).

Returns:

Object :

A reference to the host object.

addAttrs

(
  • cfgs
  • values
  • lazy
)
Object chainable

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.

Parameters:

  • 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.

Returns:

Object :

A reference to the host object.

addTarget

(
  • o
)
chainable

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.

Parameters:

after

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

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.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle :

A subscription handle capable of detaching the subscription

ancestor

(
  • depth
)
Widget

Returns the Widget instance at the specified depth.

Parameters:

  • depth Number

    Number representing the depth of the ancestor.

Returns:

Widget :

Widget instance.

attrAdded

(
  • name
)
Boolean

Checks if the given attribute has been added to the host

Parameters:

  • name String

    The name of the attribute to check.

Returns:

Boolean :

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.

before

()

Executes 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

Returns:

detach handle

bindUI

() private

Inherited from Widget but overwritten in charts/js/ChartLegend.js:40

blur

() chainable

Causes the Widget to lose focus by setting the "focused" attribute to "false"

bubble

(
  • evt
)
Boolean

Propagate an event. Requires the event-custom-complex module.

Parameters:

Returns:

Boolean :

the aggregated return value from Event.Custom.fire

destroy

(
  • destroyAllNodes
)
Widget chainable

Inherited from BaseObservable but overwritten in widget/js/Widget.js:448

Destroy lifecycle method. Fires the destroy event, prior to invoking destructors for the class hierarchy. Overrides Base's implementation, to support arguments to destroy

Subscribers to the destroy event can invoke preventDefault on the event object, to prevent destruction from proceeding.

Parameters:

  • destroyAllNodes Boolean

    If true, all nodes contained within the Widget are removed and destroyed. Defaults to false due to potentially high run-time cost.

Returns:

Widget :

A reference to this object

destructor

() protected

Inherited from Widget but overwritten in charts/js/ChartLegend.js:528

Destructor implementation ChartLegend class. Removes all items and the Graphic instance from the widget.

detach

(
  • type
  • fn
  • context
)
EventTarget

Detach one or more listeners the from the specified event

Parameters:

  • 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)

Returns:

EventTarget :

the host

detachAll

(
  • type
)

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String

    The type, or name of the event

disable

() chainable

Set the Widget's "disabled" attribute to "true".

enable

() chainable

Set the Widget's "disabled" attribute to "false".

fire

(
  • type
  • arguments
)
Boolean

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.

Parameters:

  • 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.

Returns:

Boolean :

True if the whole lifecycle of the event went through, false if at any point the event propagation was halted.

focus

() chainable

Causes the Widget to receive the focus by setting the "focused" attribute to "true".

get

(
  • name
)
Any

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.

Parameters:

  • 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"))

Returns:

Any:

The value of the attribute

getAttrs

(
  • attrs
)
Object

Gets multiple attribute values.

Parameters:

  • attrs String[] | Boolean

    Optional. An array of attribute names. If omitted, all attribute values are returned. If set to true, all attributes modified from their initial values are returned.

Returns:

Object :

An object with attribute name/value pairs.

getClassName

(
  • args
)

Inherited from Widget but overwritten in widget/js/Widget.js:309

Generate a standard prefixed classname for the Widget, prefixed by the default prefix defined by the Y.config.classNamePrefix attribute used by ClassNameManager and Widget.NAME.toLowerCase() (e.g. "yui-widget-xxxxx-yyyyy", based on default values for the prefix and widget class name).

The instance based version of this method can be used to generate standard prefixed classnames, based on the instances NAME, as opposed to Widget.NAME. This method should be used when you need to use a constant class name across different types instances.

Parameters:

  • args String* multiple

    0..n strings which should be concatenated, using the default separator defined by ClassNameManager, to create the class name

getEvent

(
  • type
  • prefixed
)
CustomEvent

Returns the custom event of the provided type has been created, a falsy value otherwise

Parameters:

  • type String

    the type, or name of the event

  • prefixed String

    if true, the type is prefixed already

Returns:

CustomEvent :

the custom event or null

getSkinName

(
  • [skinPrefix]
)
String

Returns the name of the skin that's currently applied to the widget.

Searches up the Widget's ancestor axis for, by default, a class yui3-skin-(name), and returns the (name) portion. Otherwise, returns null.

This is only really useful after the widget's DOM structure is in the document, either by render or by progressive enhancement.

Parameters:

  • [skinPrefix] String optional

    The prefix which the implementation uses for the skin ("yui3-skin-" is the default).

    NOTE: skinPrefix will be used as part of a regular expression:

    new RegExp('\b' + skinPrefix + '(\S+)')

    Although an unlikely use case, literal characters which may result in an invalid regular expression should be escaped.

Returns:

String :

The name of the skin, or null, if a matching skin class is not found.

getString

(
  • key
)
String deprecated

Inherited from Widget: widget/js/Widget.js:1240

Deprecated: Used by deprecated WidgetLocale implementations.

Helper method to get a specific string value

Parameters:

Returns:

String :

The string

getStrings

(
  • key
)
String deprecated

Inherited from Widget: widget/js/Widget.js:1252

Deprecated: Used by deprecated WidgetLocale implementations.

Helper method to get the complete set of strings for the widget

Parameters:

Returns:

String :

The strings

getTargets

()

Returns an array of bubble targets for this object.

Returns:

EventTarget[]

hide

() chainable

Hides the Widget by setting the "visible" attribute to "false".

init

(
  • cfg
)
BaseCore chainable

Inherited from BaseObservable but overwritten in base/js/BaseCore.js:319

Init lifecycle method, invoked during construction. Sets up attributes and invokes initializers for the class hierarchy.

Parameters:

  • cfg Object

    Object with configuration property name/value pairs

Returns:

BaseCore :

A reference to this object

initializer

() private

Inherited from Widget but overwritten in charts/js/ChartLegend.js:10

Initializes the chart.

isRoot

() Boolean

Determines if the Widget is the root Widget in the object hierarchy.

Returns:

Boolean :

Boolean indicating if Widget is the root Widget in the object hierarchy.

modifyAttr

(
  • name
  • 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:

readOnly;
writeOnce;
broadcast; and
getter.

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).

Parameters:

  • name String

    The name of the attribute whose configuration is to be updated.

  • config Object

    An object with configuration property/value pairs, specifying the configuration properties to modify.

next

(
  • circular
)
Widget

Returns the Widget's next sibling.

Parameters:

  • circular Boolean

    Boolean indicating if the parent's first child should be returned if the child has no next sibling.

Returns:

Widget :

Widget instance.

on

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

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.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle :

A subscription handle capable of detaching that subscription

once

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

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.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle :

A subscription handle capable of detaching the subscription

onceAfter

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

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.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle :

A subscription handle capable of detaching that subscription

parseType

(
  • type
  • [pre]
)
Array

Inherited from EventTarget: event-custom/js/event-target.js:168

Available since 3.3.0

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.

Parameters:

  • type String

    the type

  • [pre] String optional

    The prefix. Defaults to this._yuievt.config.prefix

Returns:

Array :

an array containing:

  • the detach category, if supplied,
  • the prefixed event type,
  • whether or not this is an after listener,
  • the supplied event type

previous

(
  • circular
)
Widget

Returns the Widget's previous sibling.

Parameters:

  • circular Boolean

    Boolean indicating if the parent's last child should be returned if the child has no previous sibling.

Returns:

Widget :

Widget instance.

publish

(
  • type
  • opts
)
CustomEvent

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.

Parameters:

  • type String

    the type, or name of the event

  • opts Object

    optional config params. Valid properties are:

    • 'broadcast': whether or not the YUI instance and YUI global are notified when the event is fired (false)
    • 'bubbles': whether or not this event bubbles (true) Events can only bubble if emitFacade is true.
    • 'context': the default execution context for the listeners (this)
    • 'defaultFn': the default function to execute when this event fires if preventDefault was not called
    • 'emitFacade': whether or not this event emits a facade (false)
    • 'prefix': the prefix for this targets events, e.g., 'menu' in 'menu:click'
    • 'fireOnce': if an event is configured to fire once, new subscribers after the fire will be notified immediately.
    • 'async': fireOnce event listeners will fire synchronously if the event has already fired unless async is true.
    • 'preventable': whether or not preventDefault() has an effect (true)
    • 'preventedFn': a function that is executed when preventDefault is called
    • 'queuable': whether or not this event can be queued during bubbling (false)
    • 'silent': if silent is true, debug messages are not provided for this event.
    • 'stoppedFn': a function that is executed when stopPropagation is called

    • 'monitored': specifies whether or not this event should send notifications about when the event has been attached, detached, or published.
    • 'type': the event type (valid option if not provided as the first parameter to publish)

Returns:

CustomEvent :

the custom event

removeAttr

(
  • name
)

Removes an attribute from the host object

Parameters:

  • name String

    The name of the attribute to be removed.

removeTarget

(
  • o
)
chainable

Removes a bubble target

Parameters:

render

(
  • parentNode
)
final chainable

Establishes the initial DOM for the widget. Invoking this method will lead to the creating of all DOM elements for the widget (or the manipulation of existing DOM elements for the progressive enhancement use case).

This method should only be invoked once for an initialized widget.

It delegates to the widget specific renderer method to do the actual work.

Parameters:

  • parentNode Object | String

    Optional. The Node under which the Widget is to be rendered. This can be a Node instance or a CSS selector string.

    If the selector string returns more than one Node, the first node will be used as the parentNode. NOTE: This argument is required if both the boundingBox and contentBox are not currently in the document. If it's not provided, the Widget will be rendered to the body of the current document in this case.

renderer

() protected

Creates DOM (or manipulates DOM for progressive enhancement) This method is invoked by render() and is not chained automatically for the class hierarchy (unlike initializer, destructor) so it should be chained manually for subclasses if required.

renderUI

() private

Inherited from Widget but overwritten in charts/js/ChartLegend.js:21

reset

(
  • name
)
Object chainable

Resets the attribute (or all attributes) to its initial value, as long as the attribute is not readOnly, or writeOnce.

Parameters:

  • name String

    Optional. The name of the attribute to reset. If omitted, all attributes are reset.

Returns:

Object :

A reference to the host object.

set

(
  • name
  • value
  • [opts]
)
Object chainable

Sets the value of an attribute.

Parameters:

  • 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.

Returns:

Object :

A reference to the host object.

setAttrs

(
  • attrs
  • [opts]
)
Object chainable

Sets multiple attribute values.

Parameters:

  • attrs Object

    An object with attributes name/value pairs.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

Returns:

Object :

A reference to the host object.

show

() chainable

Shows the Widget by setting the "visible" attribute to "true".

subscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:336

Deprecated: use on

subscribe to an event

syncUI

() private

Inherited from Widget but overwritten in charts/js/ChartLegend.js:54

toString

() String

Inherited from BaseCore but overwritten in widget/js/Widget.js:1122

Generic toString implementation for all widgets.

Returns:

String :

The default string value for the widget [ displays the NAME of the instance, and the unique id ]

unsubscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:459

Deprecated: use detach

detach a listener

unsubscribeAll

(
  • type
)
deprecated

Inherited from EventTarget: event-custom/js/event-target.js:480

Deprecated: use detachAll

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String

    The type, or name of the event

Properties

_allowAdHocAttrs

Boolean protected

This 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)

_layout

Unknown private

Maps layout classes.

_UI_ATTRS

Object private

The lists of UI attributes to bind and sync for widget's _bindUI and _syncUI implementations

BOUNDING_TEMPLATE

String

Property defining the markup template for bounding box.

CONTENT_TEMPLATE

String

Property defining the markup template for content box. If your Widget doesn't need the dual boundingBox/contentBox structure, set CONTENT_TEMPLATE to null, and contentBox and boundingBox will both point to the same Node.

DEF_PARENT_NODE

String | Node

Default node to render the bounding box to. If not set, will default to the current document body.

DEF_UNIT

String

Default unit to use for dimension values

name

String deprecated

Inherited from BaseCore: base/js/BaseCore.js:297

Deprecated: Use this.constructor.NAME

The string used to identify the class of this object.

UI_EVENTS

Object

Map of DOM events that should be fired as Custom Events by the Widget instance.

Attributes

background

Rect

Background for the legend.

Fires event backgroundChange

Fires when the value for the configuration attribute background 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

boundingBox

String | Node

The outermost DOM node for the Widget, used for sizing and positioning of a Widget as well as a containing element for any decorator elements used for skinning.

Fires event boundingBoxChange

Fires when the value for the configuration attribute boundingBox 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

chart

Chart

Reference to the Chart instance.

Fires event chartChange

Fires when the value for the configuration attribute chart 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

contentBox

String | Node

A DOM node that is a direct descendant of a Widget's bounding box that houses its content.

Fires event contentBoxChange

Fires when the value for the configuration attribute contentBox 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

destroyed

Boolean readonly

Flag indicating whether or not this object has been through the destroy lifecycle phase.

Default: false

Fires event 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

direction

String

Indicates the direction in relation of the legend's layout. The direction of the legend is determined by its position value.

Fires event directionChange

Fires when the value for the configuration attribute direction 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

disabled

Boolean

Boolean indicating if the Widget should be disabled. The disabled implementation is left to the specific classes extending widget.

Default: false

Fires event disabledChange

Fires when the value for the configuration attribute disabled 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

focused

Boolean readonly

Boolean indicating if the Widget, or one of its descendants, has focus.

Default: false

Fires event focusedChange

Fires when the value for the configuration attribute focused 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

height

Number

Inherited from Widget but overwritten in charts/js/ChartLegend.js:660

The height of the legend. Depending on the implementation of the ChartLegend, this value is readOnly. By default, the legend is included in the layout of the Chart that it references. Under this circumstance, height is always readOnly. When the legend is rendered in its own dom element, the readOnly status is determined by the direction of the legend. If the position is top or bottom or the direction is horizontal, height is readOnly. If the position is left or right or the direction is vertical, height can be explicitly set. If height is not explicitly set, the height will be determined by the width of the legend's parent element.

Fires event heightChange

Fires when the value for the configuration attribute height 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

id

String

Default: Generated using guid()

Fires event idChange

Fires when the value for the configuration attribute id 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

includeInChartLayout

Boolean private

Indicates whether the chart's contentBox is the parentNode for the legend.

Fires event includeInChartLayoutChange

Fires when the value for the configuration attribute includeInChartLayout 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

initialized

Boolean readonly

Flag indicating whether or not this object has been through the init lifecycle phase.

Default: false

Fires event 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

items

Array readonly

Array of items contained in the legend. Each item is an object containing the following properties:

node
Node containing text for the legend item.
marker
Shape for the legend item.

Fires event itemsChange

Fires when the value for the configuration attribute items 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

position

String

Indicates the position and direction of the legend. Possible values are left, top, right and bottom. Values of left and right values have a direction of vertical. Values of top and bottom values have a direction of horizontal.

Fires event positionChange

Fires when the value for the configuration attribute position 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

render

Boolean | Node

Whether or not to render the widget automatically after init, and optionally, to which parent node.

Fires event renderChange

Fires when the value for the configuration attribute render 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

rendered

Boolean readonly

Flag indicating whether or not this Widget has been through the render lifecycle phase.

Default: false

Fires event renderedChange

Fires when the value for the configuration attribute rendered 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

srcNode

String | Node

The DOM node to parse for configuration values, passed to the Widget's HTML_PARSER definition

Fires event srcNodeChange

Fires when the value for the configuration attribute srcNode 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

strings

Object

Collection of strings used to label elements of the Widget's UI.

Default: null

Fires event stringsChange

Fires when the value for the configuration attribute strings 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

styles

Object

Properties used to display and style the ChartLegend. This attribute is inherited from Renderer. Below are the default values:

gap
Distance, in pixels, between the ChartLegend instance and the chart's content. When ChartLegend is rendered within a Chart instance this value is applied.
hAlign
Defines the horizontal alignment of the items in a ChartLegend rendered in a horizontal direction. This value is applied when the instance's position is set to top or bottom. This attribute can be set to left, center or right. The default value is center.
vAlign
Defines the vertical alignment of the items in a ChartLegend rendered in vertical direction. This value is applied when the instance's position is set to left or right. The attribute can be set to top, middle or bottom. The default value is middle.
item
Set of style properties applied to the items of the ChartLegend.
hSpacing
Horizontal distance, in pixels, between legend items.
vSpacing
Vertical distance, in pixels, between legend items.
label
Properties for the text of an item.
color
Color of the text. The default values is "#808080".
fontSize
Font size for the text. The default value is "85%".
marker
Properties for the item markers.
width
Specifies the width of the markers.
height
Specifies the height of the markers.
background
Properties for the ChartLegend background.
fill
Properties for the background fill.
color
Color for the fill. The default value is "#faf9f2".
border
Properties for the background border.
color
Color for the border. The default value is "#dad8c9".
weight
Weight of the border. The default values is 1.

Fires event stylesChange

Fires when the value for the configuration attribute styles 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

tabIndex

Number

Number (between -32767 to 32767) indicating the widget's position in the default tab flow. The value is used to set the "tabIndex" attribute on the widget's bounding box. Negative values allow the widget to receive DOM focus programmatically (by calling the focus method), while being removed from the default tab flow. A value of null removes the "tabIndex" attribute from the widget's bounding box.

Default: null

Fires event tabIndexChange

Fires when the value for the configuration attribute tabIndex 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

visible

Boolean

Boolean indicating whether or not the Widget is visible.

Default: TRUE

Fires event visibleChange

Fires when the value for the configuration attribute visible 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

width

Number

Inherited from Widget but overwritten in charts/js/ChartLegend.js:618

The width of the legend. Depending on the implementation of the ChartLegend, this value is readOnly. By default, the legend is included in the layout of the Chart that it references. Under this circumstance, width is always readOnly. When the legend is rendered in its own dom element, the readOnly status is determined by the direction of the legend. If the position is left or right or the direction is vertical, width is readOnly. If the position is top or bottom or the direction is horizontal, width can be explicitly set. If width is not explicitly set, the width will be determined by the width of the legend's parent element.

Fires event widthChange

Fires when the value for the configuration attribute width 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

x

Number readonly

Indicates the x position of legend.

Fires event xChange

Fires when the value for the configuration attribute x 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

y

Number readonly

Indicates the y position of legend.

Fires event yChange

Fires when the value for the configuration attribute y 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.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

Events

destroy

Lifecycle 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).

Event Payload:

init

Lifecycle 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).

Event Payload:

  • e EventFacade

    Event object, with a cfg property which refers to the configuration object passed to the constructor.

render

Lifecycle event for the render phase, fired prior to rendering the UI for the widget (prior to invoking the widget's renderer method).

Subscribers to the "on" moment of this event, will be notified before the widget is rendered.

Subscribers to the "after" moment of this event, will be notified after rendering is complete.

Event Payload:

widget:contentUpdate

Notification event, which widget implementations can fire, when they change the content of the widget. This event has no default behavior and cannot be prevented, so the "on" or "after" moments are effectively equivalent (with on listeners being invoked before after listeners).

Event Payload:

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