Plugin.Drag Class
Simple Drag plugin that can be attached to a Node or Widget via the plug method.
Constructor
Plugin.Drag
()
Item Index
Methods
- _addAttrs
- _addLazyAttr
- _aggregateAttrs
- _align
- _alignNode
- _attachWidgetListeners
- _attrCfgHash
- _baseDestroy
- _baseInit
- _canDrag
- _checkEvents
- _createEvents
- _defAlignFn
- _defAttrChangeFn
- _defDestroyFn
- _defDragFn
- _defEndFn
- _defInitFn
- _defMouseDownFn
- _destroyHierarchy
- _filterAdHocAttrs
- _filterAttrCfs
- _fireAttrChange
- _fixDragStart
- _fixIEMouseDown
- _fixIEMouseUp
- _getAttr
- _getAttrCfg
- _getAttrCfgs
- _getAttrInitVal
- _getAttrs
- _getClasses
- _getStateVal
- _getType
- _handleMouseDownEvent
- _handleMouseUp
- _handleTarget
- _ieSelectFix
- _initAttrHost
- _initAttribute
- _initAttrs
- _initBase
- _initHierarchy
- _initHierarchyData
- _isLazyAttr
- _monitor
- _move
- _moveNode
- _normAttrVals
- _parseType
- _preInitEventCfg
- _prep
- _prevEndFn
- _protectAttrs deprecated
- _removeWidgetListeners
- _set
- _setAttr
- _setAttrs
- _setAttrVal
- _setStartPosition
- _setStateVal
- _timeoutCheck
- _unprep
- _updateStopPosition
- _usesWidgetPosition
- addAttr
- addAttrs
- addHandle
- addInvalid
- addTarget
- addToGroup
- after
- attrAdded
- before
- bubble
- destroy
- destructor
- detach
- detachAll
- end
- fire
- get
- getAttrs
- getEvent
- getTargets
- init
- initializer
- initializer
- modifyAttr
- on
- once
- onceAfter
- parseType
- publish
- removeAttr
- removeFromGroup
- removeHandle
- removeInvalid
- removeTarget
- reset
- set
- setAttrs
- start
- stopDrag
- subscribe deprecated
- toString
- unsubscribe deprecated
- unsubscribeAll deprecated
- validClick
Properties
Attributes
Methods
_addAttrs
-
cfgs
-
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).
Parameters:
-
cfgs
ObjectAn object with attribute name/configuration pairs.
-
values
ObjectAn 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
BooleanWhether 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
Finishes initializing an attribute which has been lazily added.
Parameters:
-
name
ObjectThe name of the attribute
_aggregateAttrs
-
allAttrs
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
ArrayAn array of ATTRS definitions across classes in the hierarchy (subclass first, Base last)
Returns:
_align
-
xy
Calculates the offsets and set's the XY that the element will move to.
Parameters:
-
xy
ArrayThe xy coords to align with.
_alignNode
-
eXY
This method performs the alignment before the element move.
Parameters:
-
eXY
ArrayThe XY to move the element to, usually comes from the mousemove DOM event.
_attachWidgetListeners
()
private
If this is a Widget, then attach the positioning listeners
_attrCfgHash
()
private
Utility method to define the attribute hash used to filter/whitelist property mixes for this class.
_baseDestroy
()
private
Internal destroy implementation for BaseCore
_baseInit
()
private
Internal initialization implementation for BaseCore
_canDrag
-
n
Checks the object for the methods needed to drag the object around. Normally this would be a node instance, but in the case of Graphics, it may be an SVG node or something similar.
Parameters:
-
n
ObjectThe object to check
Returns:
_checkEvents
()
private
Attached to the drag:start
event, it checks if this plugin needs
to attach or detach listeners for widgets. If dd-proxy
is plugged
the default widget positioning should be ignored.
_createEvents
()
private
This method creates all the events for this Event Target and publishes them so we get Event Bubbling.
_defAlignFn
-
e
Calculates the offsets and set's the XY that the element will move to.
Parameters:
-
e
EventFacadeThe drag:align event.
_defAttrChangeFn
-
e
Default function for attribute change events.
Parameters:
-
e
EventFacadeThe event object for attribute change events.
_defDragFn
-
ev
Default function for drag:drag. Fired from _moveNode.
Parameters:
-
ev
EventFacadeThe drag:drag event
_defEndFn
()
private
Handler for fixing the selection in IE
_defInitFn
-
e
Default init event handler
Parameters:
-
e
EventFacadeEvent object, with a cfg property which refers to the configuration object passed to the constructor.
_defMouseDownFn
-
e
Handler for the mousedown DOM event
Parameters:
-
e
EventFacadeThe Event
_destroyHierarchy
()
private
Destroys the class hierarchy for this instance by invoking the destructor method on the prototype of each class in the hierarchy.
_filterAdHocAttrs
-
allAttrs
-
userVals
Parameters:
-
allAttrs
ObjectThe 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
ObjectThe config object passed in by the user, from which adhoc attrs are to be filtered.
Returns:
_filterAttrCfs
-
clazz
-
allCfgs
A helper method used when processing ATTRS across the class hierarchy during initialization. Returns a disposable object with the attributes defined for the provided class, extracted from the set of all attributes passed in.
Parameters:
Returns:
_fireAttrChange
-
attrName
-
subAttrName
-
currVal
-
newVal
-
opts
Utility method to help setup the event payload and fire the attribute change event.
Parameters:
-
attrName
StringThe name of the attribute
-
subAttrName
StringThe full path of the property being changed, if this is a sub-attribute value being change. Otherwise null.
-
currVal
AnyThe current value of the attribute
-
newVal
AnyThe new value of the attribute
-
opts
ObjectAny additional event data to mix into the attribute change event's event facade.
_fixDragStart
-
e
The function we use as the ondragstart handler when we start a drag in Internet Explorer. This keeps IE from blowing up on images as drag handles.
Parameters:
-
e
EventThe Event
_fixIEMouseDown
()
private
This method copies the onselectstart listner on the document to the _ieSelectFix property
_fixIEMouseUp
()
private
This method copies the _ieSelectFix property back to the onselectstart listner on the document.
_getAttr
-
name
Provides the common implementation for the public get method, allowing Attribute hosts to over-ride either method.
See get for argument details.
Parameters:
-
name
StringThe name of the attribute.
Returns:
_getAttrCfg
-
name
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
StringOptional. The attribute name. If not provided, the method will return the configuration for all attributes.
Returns:
_getAttrCfgs
()
Object
protected
Returns an aggregated set of attribute configurations, by traversing the class hierarchy.
Returns:
_getAttrInitVal
-
attr
-
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.
Parameters:
Returns:
_getAttrs
-
attrs
Implementation behind the public getAttrs method, to get multiple attribute values.
Parameters:
-
attrs
Array | booleanOptional. 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:
_getClasses
()
Function[]
protected
Returns the class hierarchy for this object, with BaseCore being the last class in the array.
Returns:
_getStateVal
-
name
Gets the stored value for the attribute, from either the internal state object, or the state proxy if it exits
Parameters:
-
name
StringThe name of the attribute
Returns:
_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.
_handleMouseDownEvent
-
ev
Handler for the mousedown DOM event
Parameters:
-
ev
EventFacadeThe Event
_handleMouseUp
-
ev
Handler for the mouseup DOM event
Parameters:
-
ev
EventFacadeThe Event
_handleTarget
-
config
Attribute handler for the target config attribute.
Parameters:
-
config
Boolean/ObjectThe Config
_ieSelectFix
()
private
The function we use as the onselectstart handler when we start a drag in Internet Explorer
_initAttrHost
-
attrs
-
values
-
lazy
Constructor logic for attributes. Initializes the host state, and sets up the inital attributes passed to the constructor.
Parameters:
-
attrs
ObjectThe 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
ObjectThe 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
BooleanWhether or not to add attributes lazily (passed through to addAttrs).
_initAttribute
()
private
Initializes AttributeCore
_initAttrs
-
attrs
-
values
-
lazy
Utility method to set up initial attributes defined during construction, either through the constructor.ATTRS property, or explicitly passed in.
Parameters:
-
attrs
ObjectThe 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
ObjectThe 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
BooleanWhether or not to add attributes lazily (passed through to addAttrs).
_initBase
-
config
Internal construction logic for BaseCore.
Parameters:
-
config
ObjectThe constructor configuration object
_initHierarchy
-
userVals
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
ObjectObject 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.
_isLazyAttr
-
name
Checks whether or not the attribute is one which has been added lazily and still requires initialization.
Parameters:
-
name
StringThe name of the attribute
Returns:
_monitor
-
what
-
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 -> clickattach, clickdetach, 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 | CustomEventThe prefixed name of the event being monitored, or the CustomEvent object.
-
o
ObjectInformation about the event interaction, such as fire() args, subscription category, publish config
_move
-
ev
Fired from DragDropMgr (DDM) on mousemove.
Parameters:
-
ev
EventFacadeThe mousemove DOM event
_moveNode
()
private
This method performs the actual element move.
_normAttrVals
-
valueHash
Utility method to split out simple attribute name/value pairs ("x") from complex attribute name/value pairs ("x.y.z"), so that complex attributes can be keyed by the top level attribute name.
Parameters:
-
valueHash
ObjectAn object with attribute name/value pairs
Returns:
_parseType
()
private
Returns an array with the detach key (if provided), and the prefixed event name from _getType Y.on('detachcategory| menu:click', fn)
_preInitEventCfg
-
config
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
ObjectThe user configuration object
_prep
()
private
Attach event listners and add classname
_prevEndFn
()
private
Handler for preventing the drag:end event. It will reset the node back to it's start position
_protectAttrs
-
attrs
Utility method to protect an attribute configuration hash, by merging the entire object and the individual attr config objects.
Parameters:
-
attrs
ObjectA hash of attribute to configuration object pairs.
Returns:
_removeWidgetListeners
()
private
Remove the attached widget listeners
_set
-
name
-
val
Allows setting of readOnly/writeOnce attributes. See set for argument details.
Parameters:
-
name
StringThe name of the attribute.
-
val
AnyThe value to set the attribute to.
Returns:
_setAttr
-
name
-
value
-
opts
-
force
Provides the common implementation for the public set and protected _set methods.
See set for argument details.
Parameters:
-
name
StringThe name of the attribute.
-
value
AnyThe value to set the attribute to.
-
opts
Object(Optional) Optional event data to be mixed into the event facade passed to subscribers of the attribute's change event. This is currently a hack. There's no real need for the AttributeCore implementation to support this parameter, but breaking it out into AttributeObservable, results in additional function hops for the critical path.
-
force
BooleanIf true, allows the caller to set values for readOnly or writeOnce attributes which have already been set.
Returns:
_setAttrs
-
attrs
Implementation behind the public setAttrs method, to set multiple attribute values.
Parameters:
-
attrs
ObjectAn object with attributes name/value pairs.
Returns:
_setAttrVal
-
attrName
-
subAttrName
-
prevVal
-
newVal
Updates the stored value of the attribute in the privately held State object, if validation and setter passes.
Parameters:
Returns:
_setStartPosition
-
xy
Sets the current position of the Element and calculates the offset
Parameters:
-
xy
ArrayThe XY coords to set the position to.
_setStateVal
-
name
-
value
Sets the stored value for the attribute, in either the internal state object, or the state proxy if it exits
Parameters:
-
name
StringThe name of the attribute
-
value
AnyThe value of the attribute
_timeoutCheck
()
private
The method passed to setTimeout to determine if the clickTimeThreshold was met.
_unprep
()
private
Detach event listeners and remove classname
_updateStopPosition
-
e
Updates the last position where the widget was stopped.
Parameters:
-
e
EventFacadeEvent Facade
_usesWidgetPosition
()
private
Returns true if widget uses widgetPosition, otherwise returns false
addAttr
-
name
-
config
-
lazy
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
StringThe name of the attribute.
-
config
ObjectAn 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:
addAttrs
-
cfgs
-
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.
Parameters:
-
cfgs
ObjectAn object with attribute name/configuration pairs.
-
values
ObjectAn 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
BooleanWhether 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:
addHandle
-
str
Add a handle to a drag element. Drag only initiates when a mousedown happens on this element.
Parameters:
-
str
StringThe selector to test for a valid handle. Must be a child of the element.
Returns:
addInvalid
-
str
Add a selector string to test the handle against. If the test passes the drag operation will not continue.
Parameters:
-
str
StringThe selector to test against to determine if this is an invalid drag handle.
Returns:
addTarget
-
o
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:
-
o
EventTargetthe target to add
addToGroup
-
g
Add this Drag instance to a group, this should be used for on-the-fly group additions.
Parameters:
-
g
StringThe group to add this Drag Instance to.
Returns:
after
-
type
-
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.
Parameters:
Returns:
attrAdded
-
name
Checks if the given attribute has been added to the host
Parameters:
-
name
StringThe name of the attribute to check.
Returns:
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:
bubble
-
evt
Propagate an event. Requires the event-custom-complex module.
Parameters:
-
evt
CustomEventthe custom event to propagate
Returns:
destroy
()
BaseCore
chainable
Destroy lifecycle method. Invokes destructors for the class hierarchy.
Returns:
destructor
()
private
Lifecycle destructor, unreg the drag from the DDM and remove listeners
detach
-
type
-
fn
-
context
Detach one or more listeners the from the specified event
Parameters:
-
type
String | ObjectEither 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
FunctionThe subscribed function to unsubscribe, if not supplied, all subscribers will be removed.
-
context
ObjectThe 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:
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
StringThe type, or name of the event
end
()
Self
chainable
Ends the drag operation
Returns:
fire
-
type
-
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.
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.
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.
Parameters:
-
type
String | ObjectThe 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:
get
-
name
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
StringThe 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:
getAttrs
-
attrs
Gets multiple attribute values.
Parameters:
-
attrs
Array | booleanOptional. 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:
getEvent
-
type
-
prefixed
Returns the custom event of the provided type has been created, a falsy value otherwise
Parameters:
Returns:
getTargets
()
Returns an array of bubble targets for this object.
Returns:
init
-
cfg
Init lifecycle method, invoked during construction. Sets up attributes and invokes initializers for the class hierarchy.
Parameters:
-
cfg
ObjectObject with configuration property name/value pairs
Returns:
initializer
()
protected
Sets up event listeners on drag events if interacting with a widget
initializer
-
e
Updates x,y or xy attributes on widget based on where the widget is dragged
Parameters:
-
e
EventFacadeEvent Facade
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.
on
-
type
-
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.
Parameters:
Returns:
once
-
type
-
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.
Parameters:
Returns:
onceAfter
-
type
-
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.
Parameters:
Returns:
parseType
-
type
-
[pre=this._yuievt.config.prefix]
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.
Returns:
publish
-
type
-
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.
Parameters:
-
type
Stringthe type, or name of the event
-
opts
Objectoptional 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:
removeAttr
-
name
Removes an attribute from the host object
Parameters:
-
name
StringThe name of the attribute to be removed.
removeFromGroup
-
g
Remove this Drag instance from a group, this should be used for on-the-fly group removals.
Parameters:
-
g
StringThe group to remove this Drag Instance from.
Returns:
removeHandle
-
str
Remove a Selector added by addHandle
Parameters:
-
str
StringThe selector for the handle to be removed.
Returns:
removeInvalid
-
str
Remove an invalid handle added by addInvalid
Parameters:
-
str
StringThe invalid handle to remove from the internal list.
Returns:
reset
-
name
Resets the attribute (or all attributes) to its initial value, as long as the attribute is not readOnly, or writeOnce.
Parameters:
-
name
StringOptional. The name of the attribute to reset. If omitted, all attributes are reset.
Returns:
set
-
name
-
value
Sets the value of an attribute.
Parameters:
-
name
StringThe 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
AnyThe value to set the attribute to.
Returns:
setAttrs
-
attrs
Sets multiple attribute values.
Parameters:
-
attrs
ObjectAn object with attributes name/value pairs.
Returns:
start
()
Self
chainable
Starts the drag operation
Returns:
stopDrag
()
Self
chainable
Method will forcefully stop a drag operation. For example calling this from inside an ESC keypress handler will stop this drag.
Returns:
subscribe
()
deprecated
subscribe to an event
toString
()
String
Default toString implementation. Provides the constructor NAME and the instance guid, if set.
Returns:
unsubscribe
()
deprecated
detach a listener
unsubscribeAll
-
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
StringThe type, or name of the event
validClick
-
ev
Method first checks to see if we have handles, if so it validates the click against the handle. Then if it finds a valid handle, it checks it against the invalid handles list. Returns true if a good handle was used, false otherwise.
Parameters:
-
ev
EventFacadeThe Event
Returns:
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.NONATTRS_CFG
Default: undefined (false)
_bubbleTargets
Unknown
private
The default bubbleTarget for this object. Default: Y.DD.DDM
_endTime
Date
private
The getTime of the mouseup event. Not used, just here in case someone wants/needs to use it.
_ieSelectBack
Unknown
private
We will hold a copy of the current "onselectstart" method on this property, and reset it after we are done using it.
_invalidsDefault
Object
private
A private hash of the default invalid selector strings: {'textarea': true, 'input': true, 'a': true, 'button': true, 'select': true}
_startTime
Date
private
The getTime of the mousedown event. Not used, just here in case someone wants/needs to use it.
actXY
Array
The xy that the node will be set to. Changing this will alter the position as it's dragged.
NS
String
The Drag instance will be placed on the Node instance under the dd namespace. It can be accessed via Node.dd;
target
Object
This will be a reference to the Drop instance associated with this drag if the target: true config attribute is set..
Attributes
_stoppedPosition
private
refers to the [x,y] coordinate where the drag was stopped last
Fires event _stoppedPositionChange
Fires when the value for the configuration attribute _stoppedPosition
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
_widget
private
refers to a Y.Widget if its the host, otherwise = false.
Fires event _widgetChange
Fires when the value for the configuration attribute _widget
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
activeHandle
Node
Config option is set by Drag to inform you of which handle fired the drag event (in the case that there are several handles): default false.
Fires event activeHandleChange
Fires when the value for the configuration attribute activeHandle
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
bubbles
Object
deprecated
Controls the default bubble parent for this Drag instance. Default: Y.DD.DDM. Set to false to disable bubbling. Use bubbleTargets in config
Fires event bubblesChange
Fires when the value for the configuration attribute bubbles
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
clickPixelThresh
Number
The number of pixels to move to start a drag operation, default is 3.
Fires event clickPixelThreshChange
Fires when the value for the configuration attribute clickPixelThresh
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
clickTimeThresh
Number
The number of milliseconds a mousedown has to pass to start a drag operation, default is 1000.
Fires event clickTimeThreshChange
Fires when the value for the configuration attribute clickTimeThresh
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
data
Mixed
A payload holder to store arbitrary data about this drag object, can be used to store any value.
Fires event dataChange
Fires when the value for the configuration attribute data
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
dragging
Boolean
This attribute is not meant to be used by the implementor, it is meant to be used as an Event tracker so you can listen for it to change.
Fires event draggingChange
Fires when the value for the configuration attribute dragging
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
dragMode
String
This attribute only works if the dd-drop module is active. It will set the dragMode (point, intersect, strict) of this Drag instance.
Fires event dragModeChange
Fires when the value for the configuration attribute dragMode
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
dragNode
Node
Y.Node instance to use as the draggable element, defaults to node
Fires event dragNodeChange
Fires when the value for the configuration attribute dragNode
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
groups
Array
Array of groups to add this drag into.
Fires event groupsChange
Fires when the value for the configuration attribute groups
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
haltDown
Boolean
Should the mousedown event be halted. Default: true
Fires event haltDownChange
Fires when the value for the configuration attribute haltDown
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
handles
Array
Array of valid handles to add. Adding something here will set all handles, even if previously added with addHandle
Fires event handlesChange
Fires when the value for the configuration attribute handles
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
lock
Boolean
Set to lock this drag element so that it can't be dragged: default false.
Fires event lockChange
Fires when the value for the configuration attribute lock
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
move
Boolean
If this is false, the drag element will not move with the cursor: default true. Can be used to "resize" the element.
Fires event moveChange
Fires when the value for the configuration attribute move
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
node
Node
Y.Node instance to use as the element to initiate a drag operation
Fires event nodeChange
Fires when the value for the configuration attribute node
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
offsetNode
Boolean
Offset the drag element by the difference in cursor position: default true
Fires event offsetNodeChange
Fires when the value for the configuration attribute offsetNode
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
primaryButtonOnly
Boolean
By default a drag operation will only begin if the mousedown occurred with the primary mouse button. Setting this to false will allow for all mousedown events to trigger a drag.
Fires event primaryButtonOnlyChange
Fires when the value for the configuration attribute primaryButtonOnly
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
startCentered
Boolean
Center the dragNode to the mouse position on drag:start: default false
Fires event startCenteredChange
Fires when the value for the configuration attribute startCentered
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
target
Boolean
This attribute only works if the dd-drop module has been loaded. It will make this node a drop target as well as draggable.
Fires event targetChange
Fires when the value for the configuration attribute target
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
useShim
Boolean
Use the protective shim on all drag operations: default true. Only works with dd-ddm, not dd-ddm-base.
Fires event useShimChange
Fires when the value for the configuration attribute useShim
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
EventFacadeAn Event Facade object with the following attribute-specific properties added:
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:
-
e
EventFacadeEvent object
drag:addHandle
CustomEvent
Fires after a handle is added.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- handle
- The handle that was added.
drag:addInvalid
CustomEvent
Fires after an invalid selector is added.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- handle
- The handle that was added.
drag:afterMouseDown
CustomEvent
Fires after the mousedown event has been cleared.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- ev
- The original mousedown event.
drag:align
CustomEvent
Fires when this node is aligned.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- pageX
- The current node position X.
- pageY
- The current node position Y.
drag:drag
CustomEvent
Fires every mousemove during a drag operation.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- pageX
- The current node position X.
- pageY
- The current node position Y.
- scroll
- Should a scroll action occur.
- info
- Object hash containing calculated XY arrays: start, xy, delta, offset
drag:drophit
CustomEvent
Fires when this node is dropped on a valid Drop Target. (Fired from dd-ddm-drop)
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- drop
- The best guess on what was dropped on.
- drag
- The drag object at the time of the event.
- others
- An array of all the other drop targets that was dropped on.
drag:dropmiss
CustomEvent
Fires when this node is dropped on an invalid Drop Target. (Fired from dd-ddm-drop)
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- pageX
- The current node position X.
- pageY
- The current node position Y.
drag:end
CustomEvent
Fires at the end of a drag operation.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- pageX
- The current node position X.
- pageY
- The current node position Y.
- startTime
- The startTime of the event, from the start event.
- endTime
- The endTime of the event. getTime on the current Date object.
drag:enter
CustomEvent
Fires when this node enters a Drop Target. (Fired from dd-drop)
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- drop
- The drop object at the time of the event.
- drag
- The drag object at the time of the event.
drag:exit
CustomEvent
Fires when this node exits a Drop Target. (Fired from dd-drop)
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- drop
- The drop object at the time of the event.
drag:mouseDown
CustomEvent
Handles the mousedown DOM event, checks to see if you have a valid handle then starts the drag timers.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- ev
- The original mousedown event.
drag:over
CustomEvent
Fires when this node is over a Drop Target. (Fired from dd-drop)
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- drop
- The drop object at the time of the event.
- drag
- The drag object at the time of the event.
drag:removeHandle
CustomEvent
Fires after a handle is removed.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- handle
- The handle that was removed.
drag:removeInvalid
CustomEvent
Fires after an invalid selector is removed.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- handle
- The handle that was removed.
drag:start
CustomEvent
Fires at the start of a drag operation.
Event Payload:
-
event
EventFacadeAn Event Facade object with the following specific property added:
- pageX
- The original node position X.
- pageY
- The original node position Y.
- startTime
- The startTime of the event. getTime on the current Date object.
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
EventFacadeEvent object, with a cfg property which refers to the configuration object passed to the constructor.