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DOM::Event Class Reference

Introduced in DOM Level 2. More...

#include <dom2_events.h>

Inheritance diagram for DOM::Event:

DOM::MutationEvent DOM::UIEvent DOM::MouseEvent DOM::TextEvent List of all members.

Public Types

enum  PhaseType { CAPTURING_PHASE = 1, AT_TARGET = 2, BUBBLING_PHASE = 3 }

Public Methods

 Event ()
 Event (const Event &other)
virtual ~Event ()
Event & operator= (const Event &other)
DOMString type () const
Node target () const
Node currentTarget () const
unsigned short eventPhase () const
bool bubbles () const
bool cancelable () const
DOMTimeStamp timeStamp () const
void stopPropagation ()
void preventDefault ()
void initEvent (const DOMString &eventTypeArg, bool canBubbleArg, bool cancelableArg)
EventImpl * handle () const
bool isNull () const
DOMString eventModuleName ()

Protected Methods

 Event (EventImpl *i)

Protected Attributes

EventImpl * impl

Friends

class Document
class NodeImpl
class DocumentImpl
class KJS::Image

Detailed Description

Introduced in DOM Level 2.

The Event interface is used to provide contextual information about an event to the handler processing the event. An object which implements the Event interface is generally passed as the first parameter to an event handler. More specific context information is passed to event handlers by deriving additional interfaces from Event which contain information directly relating to the type of event they accompany. These derived interfaces are also implemented by the object passed to the event listener.


Member Enumeration Documentation

enum DOM::Event::PhaseType
 

An integer indicating which phase of event flow is being processed.

AT_TARGET: The event is currently being evaluated at the target EventTarget.

BUBBLING_PHASE: The current event phase is the bubbling phase.

CAPTURING_PHASE: The current event phase is the capturing phase.

Enumeration values:
CAPTURING_PHASE 
AT_TARGET 
BUBBLING_PHASE 


Constructor & Destructor Documentation

DOM::Event::Event  
 

DOM::Event::Event const Event &    other
 

virtual DOM::Event::~Event   [virtual]
 

DOM::Event::Event EventImpl *    i [protected]
 


Member Function Documentation

Event& DOM::Event::operator= const Event &    other
 

Reimplemented in DOM::UIEvent, DOM::MouseEvent, DOM::TextEvent, and DOM::MutationEvent.

DOMString DOM::Event::type  
 

The name of the event (case-insensitive).

The name must be an XML name.

Node DOM::Event::target  
 

Used to indicate the EventTarget to which the event was originally dispatched.

Node DOM::Event::currentTarget  
 

Used to indicate the EventTarget whose EventListeners are currently being processed.

This is particularly useful during capturing and bubbling.

unsigned short DOM::Event::eventPhase  
 

Used to indicate which phase of event flow is currently being evaluated.

bool DOM::Event::bubbles  
 

Used to indicate whether or not an event is a bubbling event.

If the event can bubble the value is true, else the value is false.

bool DOM::Event::cancelable  
 

Used to indicate whether or not an event can have its default action prevented.

If the default action can be prevented the value is true, else the value is false.

DOMTimeStamp DOM::Event::timeStamp  
 

Used to specify the time (in milliseconds relative to the epoch) at which the event was created.

Due to the fact that some systems may not provide this information the value of timeStamp may be not available for all events. When not available, a value of 0 will be returned. Examples of epoch time are the time of the system start or 0:0:0 UTC 1st January 1970.

void DOM::Event::stopPropagation  
 

The stopPropagation method is used prevent further propagation of an event during event flow.

If this method is called by any EventListener the event will cease propagating through the tree. The event will complete dispatch to all listeners on the current EventTarget before event flow stops. This method may be used during any stage of event flow.

void DOM::Event::preventDefault  
 

If an event is cancelable, the preventDefault method is used to signify that the event is to be canceled, meaning any default action normally taken by the implementation as a result of the event will not occur.

If, during any stage of event flow, the preventDefault method is called the event is canceled. Any default action associated with the event will not occur. Calling this method for a non-cancelable event has no effect. Once preventDefault has been called it will remain in effect throughout the remainder of the event's propagation. This method may be used during any stage of event flow.

void DOM::Event::initEvent const DOMString   eventTypeArg,
bool    canBubbleArg,
bool    cancelableArg
 

The initEvent method is used to initialize the value of an Event created through the DocumentEvent interface.

This method may only be called before the Event has been dispatched via the dispatchEvent method, though it may be called multiple times during that phase if necessary. If called multiple times the final invocation takes precedence. If called from a subclass of Event interface only the values specified in the initEvent method are modified, all other attributes are left unchanged.

Parameters:
eventTypeArg  Specifies the event type. This type may be any event type currently defined in this specification or a new event type.. The string must be an XML name.
Any new event type must not begin with any upper, lower, or mixed case version of the string "DOM". This prefix is reserved for future DOM event sets. It is also strongly recommended that third parties adding their own events use their own prefix to avoid confusion and lessen the probability of conflicts with other new events.
Parameters:
canBubbleArg  Specifies whether or not the event can bubble.
cancelableArg  Specifies whether or not the event's default action can be prevented.

EventImpl* DOM::Event::handle  
 

bool DOM::Event::isNull  
 

DOMString DOM::Event::eventModuleName  
 


Friends And Related Function Documentation

friend class Document [friend]
 

friend class NodeImpl [friend]
 

friend class DocumentImpl [friend]
 

friend class KJS::Image [friend]
 


Member Data Documentation

EventImpl* DOM::Event::impl [protected]
 


The documentation for this class was generated from the following file:
Generated on Sat Jan 31 23:28:24 2004 for XPath by doxygen1.2.18