| Package | mx.managers |
| Class | public class SystemManager |
| Inheritance | SystemManager  flash.display.MovieClip |
| Implements | IChildList, IFlexDisplayObject, IFlexModuleFactory, ISWFBridgeProvider, ISystemManager |
mx.core.Application, which
is the main, or top-level, window within an application.
Every application has a SystemManager. The SystemManager sends an event if the size of the application window changes (you cannot change it from within the application, but only through interaction with the operating system window or browser). It parents all displayable things within the application like the main mx.core.Application instance and all popups, tooltips, cursors, and so on. Any object parented by the SystemManager is considered to be a top-level window, even tooltips and cursors.
The SystemManager also switches focus between top-level windows if there are more than one IFocusManagerContainer displayed and users are interacting with components within the IFocusManagerContainers.
All keyboard and mouse activity that is not expressly trapped is seen by the SystemManager, making it a good place to monitor activity should you need to do so.
If an application is loaded into another application, a SystemManager
will still be created, but will not manage an application window,
depending on security and domain rules.
Instead, it will be the content of the Loader
that loaded it and simply serve as the parent of the sub-application
The SystemManager maintains multiple lists of children, one each for tooltips, cursors,
popup windows. This is how it ensures that popup windows "float" above the main
application windows and that tooltips "float" above that and cursors above that.
If you simply examine the numChildren property or
call the getChildAt() method on the SystemManager, you are accessing
the main application window and any other windows that aren't popped up. To get the list
of all windows, including popups, tooltips and cursors, use
the rawChildren property.
The SystemManager is the first display class created within an application.
It is responsible for creating an mx.preloaders.Preloader that displays and
mx.preloaders.DownloadProgressBar while the application finishes loading,
then creates the mx.core.Application instance.
| Property | Defined by | ||
|---|---|---|---|
| application : IUIComponent
[read-only]
The application parented by this SystemManager.
| SystemManager | ||
| childAllowsParent : Boolean [read-only]
Tests if the child allows its parent to access its display objects or listen
to messages that originate in the child.
| SystemManager | ||
| cursorChildren : IChildList
[read-only]
An list of the custom cursors
being parented by this ISystemManager.
| SystemManager | ||
| document : Object
A reference to the document object.
| SystemManager | ||
| embeddedFontList : Object [read-only]
A table of embedded fonts in this application.
| SystemManager | ||
| explicitHeight : Number
The explicit width of this object.
| SystemManager | ||
| explicitWidth : Number
The explicit width of this object.
| SystemManager | ||
| focusPane : Sprite
The focus pane associated with this object.
| SystemManager | ||
| height : Number
The height of this object.
| SystemManager | ||
| measuredHeight : Number [read-only]
The measuredHeight is the explicit or measuredHeight of
the main mx.core.Application window
or the starting height of the SWF if the main window
has not yet been created or does not exist.
| SystemManager | ||
| measuredWidth : Number [read-only]
The measuredWidth is the explicit or measuredWidth of
the main mx.core.Application window,
or the starting width of the SWF if the main window
has not yet been created or does not exist.
| SystemManager | ||
| numChildren : int [read-only]
The number of non-floating windows.
| SystemManager | ||
| numModalWindows : int
The number of modal windows.
| SystemManager | ||
| parent : DisplayObjectContainer [read-only]
Override parent property to handle the case where the parent is in
a differnt sandbox.
| SystemManager | ||
| parentAllowsChild : Boolean [read-only]
Tests if the parent allows its child to access its display objects or listen
to messages that originate in the parent.
| SystemManager | ||
| popUpChildren : IChildList
[read-only]
An list of the topMost (popup)
windows being parented by this ISystemManager.
| SystemManager | ||
| preloaderBackgroundAlpha : Number [read-only]
The background alpha used by the child of the preloader.
| SystemManager | ||
| preloaderBackgroundColor : uint [read-only]
The background color used by the child of the preloader.
| SystemManager | ||
| preloaderBackgroundImage : Object [read-only]
The background color used by the child of the preloader.
| SystemManager | ||
| preloaderBackgroundSize : String [read-only]
The background size used by the child of the preloader.
| SystemManager | ||
| rawChildren : IChildList
[read-only]
A list of all children
being parented by this ISystemManager.
| SystemManager | ||
| screen : Rectangle [read-only]
The size and position of the application window.
| SystemManager | ||
| swfBridge : IEventDispatcher [read-only]
A bridge to the application that is associated with the implementor of this
interface.
| SystemManager | ||
| swfBridgeGroup : ISWFBridgeGroup | SystemManager | ||
| toolTipChildren : IChildList
[read-only]
A list of the tooltips
being parented by this ISystemManager.
| SystemManager | ||
| topLevelSystemManager : ISystemManager
[read-only]
Returns the SystemManager responsible for the application window.
| SystemManager | ||
| width : Number
The width of this object.
| SystemManager | ||
| Method | Defined by | ||
|---|---|---|---|
|
Constructor.
| SystemManager | ||
|
activate(f:IFocusManagerContainer):void
Activates the FocusManager in an IFocusManagerContainer.
| SystemManager | ||
|
addChildBridge(bridge:IEventDispatcher, owner:DisplayObject):void
Add a bridge to talk to the child owned by
owner. | SystemManager | ||
|
addChildToSandboxRoot(layer:String, child:DisplayObject):void
Adds a child to the requested childList.
| SystemManager | ||
|
Registers a top-level window containing a FocusManager.
| SystemManager | ||
|
create(... params):Object
A factory method that requests an instance of a
definition known to the module.
| SystemManager | ||
|
deactivate(f:IFocusManagerContainer):void
Deactivates the FocusManager in an IFocusManagerContainer, and activate
the FocusManager of the next highest window that is an IFocusManagerContainer.
| SystemManager | ||
|
deployMouseShields(deploy:Boolean):void
Deploy or remove mouse shields.
| SystemManager | ||
|
dispatchEventFromSWFBridges(event:Event, skip:IEventDispatcher = null, trackClones:Boolean = false, toOtherSystemManagers:Boolean = false):void
Dispatch a message to all parent and child applications in this SystemManager's SWF bridge group, regardless of
whether they are in the same SecurityDomain or not.
| SystemManager | ||
|
getDefinitionByName(name:String):Object
Converts the given String to a Class or package-level Function.
| SystemManager | ||
|
getExplicitOrMeasuredHeight():Number
A convenience method for determining whether to use the
explicit or measured height.
| SystemManager | ||
|
getExplicitOrMeasuredWidth():Number
A convenience method for determining whether to use the
explicit or measured width.
| SystemManager | ||
|
getSandboxRoot():DisplayObject
Go up the parent chain to get the top level system manager in this
SecurityDomain.
| SystemManager | ||
|
getSWFRoot(object:Object):DisplayObject
[static]
Returns the root DisplayObject of the SWF that contains the code
for the given object.
| SystemManager | ||
|
getTopLevelRoot():DisplayObject
Go up the parent chain to get the top level system manager.
| SystemManager | ||
|
getVisibleApplicationRect(bounds:Rectangle = null):Rectangle
Get the bounds of the loaded application that are visible to the user
on the screen.
| SystemManager | ||
|
isFontFaceEmbedded(textFormat:TextFormat):Boolean
Returns
true if the required font face is embedded
in this application, or has been registered globally by using the
Font.registerFont() method. | SystemManager | ||
|
isTopLevel():Boolean
Returns
true if this ISystemManager is responsible
for an application window, and false if this
application has been loaded into another application. | SystemManager | ||
|
isTopLevelRoot():Boolean
Tests if this system manager is the root of all
top level system managers.
| SystemManager | ||
|
isTopLevelWindow(object:DisplayObject):Boolean
Determines if the given DisplayObject is the
top-level window.
| SystemManager | ||
|
move(x:Number, y:Number):void
Calling the
move() method
has no effect as it is directly mapped
to the application window or the loader. | SystemManager | ||
|
removeChildBridge(bridge:IEventDispatcher):void
Remove a child bridge.
| SystemManager | ||
|
removeChildFromSandboxRoot(layer:String, child:DisplayObject):void
Removes a child from the requested childList.
| SystemManager | ||
|
Unregisters a top-level window containing a FocusManager.
| SystemManager | ||
|
setActualSize(newWidth:Number, newHeight:Number):void
Calling the
setActualSize() method
has no effect if it is directly mapped
to the application window and if it is the top-level window. | SystemManager | ||
|
useSWFBridge():Boolean
Determines if the caller using this system manager
should should communicate directly with other managers
or if it should communicate with a bridge.
| SystemManager | ||
| Event | Summary | Defined by | ||
|---|---|---|---|---|
| Dispatched when the application has finished initializing | SystemManager | |||
| Dispatched every 100 milliseconds when there has been no keyboard or mouse activity for 1 second. | SystemManager | |||
| Dispatched when the Stage is resized. | SystemManager | |||
| application | property |
application:IUIComponent [read-only]The application parented by this SystemManager. SystemManagers create an instance of an Application even if they are loaded into another Application. Thus, this may not match mx.core.Application.application if the SWF has been loaded into another application.
Note that this property is not typed as mx.core.Application because of load-time performance considerations but can be coerced into an mx.core.Application.
Implementation public function get application():IUIComponent
| childAllowsParent | property |
childAllowsParent:Boolean [read-only]
Tests if the child allows its parent to access its display objects or listen
to messages that originate in the child.
true if access if allowed; otherwise false.
public function get childAllowsParent():Boolean
| cursorChildren | property |
cursorChildren:IChildList [read-only]An list of the custom cursors being parented by this ISystemManager.
An ISystemManager has various types of children,
such as the Application, popups, top-most windows,
tooltips, and custom cursors.
You can access the custom cursors through
the cursorChildren property.
The IChildList object has methods like getChildAt()
and properties like numChildren.
For example, cursorChildren.numChildren gives
the number of custom cursors (which will be either 0 or 1)
and, if a custom cursor exists, you can access it as
cursorChildren.getChildAt(0).
public function get cursorChildren():IChildList
| document | property |
document:Object [read-write]A reference to the document object. A document object is an Object at the top of the hierarchy of a Flex application, MXML component, or AS component.
Implementation public function get document():Object
public function set document(value:Object):void
| embeddedFontList | property |
embeddedFontList:Object [read-only]A table of embedded fonts in this application. The object is a table indexed by the font name.
Implementation public function get embeddedFontList():Object
| explicitHeight | property |
explicitHeight:Number [read-write]The explicit width of this object. For the SystemManager this should always be NaN unless the application was loaded into another application. If the application was not loaded into another application, setting this value has no effect.
Implementation public function get explicitHeight():Number
public function set explicitHeight(value:Number):void
| explicitWidth | property |
explicitWidth:Number [read-write]The explicit width of this object. For the SystemManager this should always be NaN unless the application was loaded into another application. If the application was not loaded into another application, setting this value has no effect.
Implementation public function get explicitWidth():Number
public function set explicitWidth(value:Number):void
| focusPane | property |
focusPane:Sprite [read-write]The focus pane associated with this object. An object has a focus pane when one of its children has focus.
Implementation public function get focusPane():Sprite
public function set focusPane(value:Sprite):void
| height | property |
height:Number [read-write]The height of this object. For the SystemManager this should always be the width of the stage unless the application was loaded into another application. If the application was not loaded into another application, setting this value has no effect.
Implementation public function get height():Number
public function set height(value:Number):void
| measuredHeight | property |
measuredHeight:Number [read-only]The measuredHeight is the explicit or measuredHeight of the main mx.core.Application window or the starting height of the SWF if the main window has not yet been created or does not exist.
Implementation public function get measuredHeight():Number
| measuredWidth | property |
measuredWidth:Number [read-only]The measuredWidth is the explicit or measuredWidth of the main mx.core.Application window, or the starting width of the SWF if the main window has not yet been created or does not exist.
Implementation public function get measuredWidth():Number
| numChildren | property |
numChildren:int [read-only]The number of non-floating windows. This is the main application window plus any other windows added to the SystemManager that are not popups, tooltips or cursors.
Implementation public function get numChildren():int
| numModalWindows | property |
numModalWindows:int [read-write]The number of modal windows. Modal windows don't allow clicking in another windows which would normally activate the FocusManager in that window. The PopUpManager modifies this count as it creates and destroys modal windows.
Implementation public function get numModalWindows():int
public function set numModalWindows(value:int):void
| parent | property |
parent:DisplayObjectContainer [read-only]Override parent property to handle the case where the parent is in a differnt sandbox. If the parent is in the same sandbox it is returned. If the parent is in a diffent sandbox, then null is returned.
Implementation public function get parent():DisplayObjectContainer
| parentAllowsChild | property |
parentAllowsChild:Boolean [read-only]
Tests if the parent allows its child to access its display objects or listen
to messages that originate in the parent.
true if access if allowed; otherwise false.
public function get parentAllowsChild():Boolean
| popUpChildren | property |
popUpChildren:IChildList [read-only]An list of the topMost (popup) windows being parented by this ISystemManager.
An ISystemManager has various types of children,
such as the Application, popups,
tooltips, and custom cursors.
You can access the top-most windows through
the popUpChildren property.
The IChildList object has methods like getChildAt()
and properties like numChildren.
For example, popUpChildren.numChildren gives
the number of topmost windows and you can access them as
popUpChildren.getChildAt(i).
public function get popUpChildren():IChildList
| preloaderBackgroundAlpha | property |
preloaderBackgroundAlpha:Number [read-only]The background alpha used by the child of the preloader.
Implementation public function get preloaderBackgroundAlpha():Number
| preloaderBackgroundColor | property |
preloaderBackgroundColor:uint [read-only]The background color used by the child of the preloader.
Implementation public function get preloaderBackgroundColor():uint
| preloaderBackgroundImage | property |
preloaderBackgroundImage:Object [read-only]The background color used by the child of the preloader.
Implementation public function get preloaderBackgroundImage():Object
| preloaderBackgroundSize | property |
preloaderBackgroundSize:String [read-only]The background size used by the child of the preloader.
Implementation public function get preloaderBackgroundSize():String
| rawChildren | property |
rawChildren:IChildList [read-only]A list of all children being parented by this ISystemManager.
An ISystemManager has various types of children, such as the Application, popups, tooltips, and custom cursors.
The IChildList object has methods like getChildAt()
and properties like numChildren.
public function get rawChildren():IChildList
| screen | property |
screen:Rectangle [read-only]
The size and position of the application window.
The Rectangle object contains x, y,
width, and height properties.
public function get screen():Rectangle
| swfBridge | property |
swfBridge:IEventDispatcher [read-only]A bridge to the application that is associated with the implementor of this interface. The IEventDispatcher that can be used to send events to an application in a different ApplicationDomain or a different sandbox.
Implementation public function get swfBridge():IEventDispatcher
| swfBridgeGroup | property |
swfBridgeGroup:ISWFBridgeGroup [read-write]Implementation
public function get swfBridgeGroup():ISWFBridgeGroup
public function set swfBridgeGroup(value:ISWFBridgeGroup):void
| toolTipChildren | property |
toolTipChildren:IChildList [read-only]A list of the tooltips being parented by this ISystemManager.
An ISystemManager has various types of children, such as the Application, popups, topmost windows, tooltips, and custom cursors.
The IChildList object has methods like getChildAt()
and properties like numChildren.
For example, toolTipChildren.numChildren gives
the number of tooltips (which will be either 0 or 1)
and, if a tooltip exists, you can access it as
toolTipChildren.getChildAt(0).
public function get toolTipChildren():IChildList
| topLevelSystemManager | property |
topLevelSystemManager:ISystemManager [read-only]Returns the SystemManager responsible for the application window. This will be the same SystemManager unless this application has been loaded into another application.
Implementation public function get topLevelSystemManager():ISystemManager
| width | property |
width:Number [read-write]The width of this object. For the SystemManager this should always be the width of the stage unless the application was loaded into another application. If the application was not loaded into another application, setting this value will have no effect.
Implementation public function get width():Number
public function set width(value:Number):void
| SystemManager | () | constructor |
public function SystemManager()Constructor.
This is the starting point for all Flex applications. This class is set to be the root class of a Flex SWF file. Flash Player instantiates an instance of this class, causing this constructor to be called.
| activate | () | method |
public function activate(f:IFocusManagerContainer):voidActivates the FocusManager in an IFocusManagerContainer.
Parametersf:IFocusManagerContainer — IFocusManagerContainer the top-level window
whose FocusManager should be activated.
|
| addChildBridge | () | method |
public function addChildBridge(bridge:IEventDispatcher, owner:DisplayObject):void
Add a bridge to talk to the child owned by owner.
bridge:IEventDispatcher — The bridge used to talk to the parent.
|
|
owner:DisplayObject — The display object that owns the bridge.
|
| addChildToSandboxRoot | () | method |
public function addChildToSandboxRoot(layer:String, child:DisplayObject):voidAdds a child to the requested childList.
Parameterslayer:String — The child list that the child should be added to. The valid choices are
"popUpChildren", "cursorChildren", and "toolTipChildren". The choices match the property
names of ISystemManager and that is the list where the child is added.
|
|
child:DisplayObject — The child to add.
|
| addFocusManager | () | method |
public function addFocusManager(f:IFocusManagerContainer):voidRegisters a top-level window containing a FocusManager. Called by the FocusManager, generally not called by application code.
Parametersf:IFocusManagerContainer — The top-level window in the application.
|
| create | () | method |
public function create(... params):ObjectA factory method that requests an instance of a definition known to the module. You can provide an optional set of parameters to let building factories change what they create based on the input. Passing null indicates that the default definition is created, if possible. This method is overridden in the autogenerated subclass.
Parameters... params — An optional list of arguments. You can pass
any number of arguments, which are then stored in an Array
called parameters.
|
Object — An instance of the module, or null.
|
| deactivate | () | method |
public function deactivate(f:IFocusManagerContainer):voidDeactivates the FocusManager in an IFocusManagerContainer, and activate the FocusManager of the next highest window that is an IFocusManagerContainer.
Parametersf:IFocusManagerContainer — IFocusManagerContainer the top-level window
whose FocusManager should be deactivated.
|
| deployMouseShields | () | method |
public function deployMouseShields(deploy:Boolean):voidDeploy or remove mouse shields. Mouse shields block mouse input to untrusted applications. The reason you would want to block mouse input is because when you are dragging over an untrusted application you would normally not receive any mouse move events. The Flash Player does not send events across trusted/untrusted boundries due to security concerns. By covering the untrusted application with a mouse shield (assuming you are its parent) you can get mouse move message and the drag operation will work as expected.
Parametersdeploy:Boolean — true to deploy the mouse shields, false
to remove the mouse shields.
|
| dispatchEventFromSWFBridges | () | method |
public function dispatchEventFromSWFBridges(event:Event, skip:IEventDispatcher = null, trackClones:Boolean = false, toOtherSystemManagers:Boolean = false):voidDispatch a message to all parent and child applications in this SystemManager's SWF bridge group, regardless of whether they are in the same SecurityDomain or not. You can optionally exclude an application with this method's parameters.
Parametersevent:Event — The event to dispatch.
|
|
skip:IEventDispatcher (default = null) |
|
trackClones:Boolean (default = false) |
|
toOtherSystemManagers:Boolean (default = false) |
| getDefinitionByName | () | method |
public function getDefinitionByName(name:String):Object
Converts the given String to a Class or package-level Function.
Calls the appropriate ApplicationDomain.getDefinition()
method based on
whether you are loaded into another application or not.
name:String — Name of class, for example "mx.video.VideoManager".
|
Object — The Class represented by the name, or null.
|
| getExplicitOrMeasuredHeight | () | method |
public function getExplicitOrMeasuredHeight():NumberA convenience method for determining whether to use the explicit or measured height.
ReturnsNumber — A Number that is the explicitHeight if defined,
or the measuredHeight property if not.
|
| getExplicitOrMeasuredWidth | () | method |
public function getExplicitOrMeasuredWidth():NumberA convenience method for determining whether to use the explicit or measured width.
ReturnsNumber — A Number that is the explicitWidth if defined,
or the measuredWidth property if not.
|
| getSandboxRoot | () | method |
public function getSandboxRoot():DisplayObjectGo up the parent chain to get the top level system manager in this SecurityDomain.
ReturnsDisplayObject — The root system manager in this SecurityDomain.
|
| getSWFRoot | () | method |
public static function getSWFRoot(object:Object):DisplayObjectReturns the root DisplayObject of the SWF that contains the code for the given object.
Parametersobject:Object — Any Object.
|
DisplayObject — The root DisplayObject
|
| getTopLevelRoot | () | method |
public function getTopLevelRoot():DisplayObject
Go up the parent chain to get the top level system manager.
Returns null if not on the display list or we don't have
access to the top-level system manager.
DisplayObject — The root system manager.
|
| getVisibleApplicationRect | () | method |
public function getVisibleApplicationRect(bounds:Rectangle = null):RectangleGet the bounds of the loaded application that are visible to the user on the screen.
Parametersbounds:Rectangle (default = null)bounds is null the
starting bounds is defined by the screen property of the
system manager.
|
Rectangle — a Rectangle including the visible portion of the this
object. The rectangle is in global coordinates.
|
| isFontFaceEmbedded | () | method |
public function isFontFaceEmbedded(textFormat:TextFormat):Boolean
Returns true if the required font face is embedded
in this application, or has been registered globally by using the
Font.registerFont() method.
textFormat:TextFormat — The TextFormat class representing character formatting information.
|
Boolean — true if the required font face is embedded
in this application, or has been registered globally by using the
Font.registerFont() method.
|
| isTopLevel | () | method |
public function isTopLevel():Boolean
Returns true if this ISystemManager is responsible
for an application window, and false if this
application has been loaded into another application.
Boolean — true if this ISystemManager is responsible
for an application window.
|
| isTopLevelRoot | () | method |
public function isTopLevelRoot():BooleanTests if this system manager is the root of all top level system managers.
ReturnsBoolean — true if the SystemManager
is the root of all SystemManagers on the display list,
and false otherwise.
|
| isTopLevelWindow | () | method |
public function isTopLevelWindow(object:DisplayObject):BooleanDetermines if the given DisplayObject is the top-level window.
Parametersobject:DisplayObject — The DisplayObject to test.
|
Boolean — true if the given DisplayObject is the
top-level window.
|
| move | () | method |
public function move(x:Number, y:Number):void
Calling the move() method
has no effect as it is directly mapped
to the application window or the loader.
x:Number — The new x coordinate.
|
|
y:Number — The new y coordinate.
|
| removeChildBridge | () | method |
public function removeChildBridge(bridge:IEventDispatcher):voidRemove a child bridge.
Parametersbridge:IEventDispatcher — The target bridge to remove.
|
| removeChildFromSandboxRoot | () | method |
public function removeChildFromSandboxRoot(layer:String, child:DisplayObject):voidRemoves a child from the requested childList.
Parameterslayer:String — The child list that the child should be removed from. The valid choices are
"popUpChildren", "cursorChildren", and "toolTipChildren". The choices match the property
names of ISystemManager and that is the list where the child is removed from.
|
|
child:DisplayObject — The child to remove.
|
| removeFocusManager | () | method |
public function removeFocusManager(f:IFocusManagerContainer):voidUnregisters a top-level window containing a FocusManager. Called by the FocusManager, generally not called by application code.
Parametersf:IFocusManagerContainer — The top-level window in the application.
|
| setActualSize | () | method |
public function setActualSize(newWidth:Number, newHeight:Number):void
Calling the setActualSize() method
has no effect if it is directly mapped
to the application window and if it is the top-level window.
Otherwise attempts to resize itself, clipping children if needed.
newWidth:Number — The new width.
|
|
newHeight:Number — The new height.
|
| useSWFBridge | () | method |
public function useSWFBridge():BooleanDetermines if the caller using this system manager should should communicate directly with other managers or if it should communicate with a bridge.
ReturnsBoolean — true if the caller using this system manager
should communicate using sandbox bridges.
If false the system manager may directly call
other managers directly via references.
|
| applicationComplete | event |
mx.events.FlexEvent
mx.events.FlexEvent.APPLICATION_COMPLETE
Dispatched when the application has finished initializing
The FlexEvent.APPLICATION_COMPLETE constant defines the value of the
type property of the event object for a applicationComplete event.
The properties of the event object have the following values:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
| idle | event |
mx.events.FlexEvent
mx.events.FlexEvent.IDLE
Dispatched every 100 milliseconds when there has been no keyboard or mouse activity for 1 second.
The FlexEvent.IDLE constant defines the value of the
type property of the event object for a idle event.
The properties of the event object have the following values:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
| resize | event |