Package com.itextpdf.kernel.events

Class EventDispatcher

java.lang.Object

com.itextpdf.kernel.events.EventDispatcher

All Implemented Interfaces:

IEventDispatcher

       public class EventDispatcher extends Object implements IEventDispatcher
      

IEventDispatcher implementation that forwards Events to registered IEventHandler implementations.

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<String,List<IEventHandler>>	eventHandlers

Constructor Summary

Constructors

Constructor	Description
EventDispatcher()

Method Summary

Modifier and Type	Method	Description
void	addEventHandler(String type, IEventHandler handler)	Adds new event handler.
void	dispatchEvent(Event event)	Dispatches an event.
void	dispatchEvent(Event event, boolean delayed)	Dispatches a delayed event.
boolean	hasEventHandler(String type)	Checks if event dispatcher as an event handler assigned for a certain event type.
void	removeAllHandlers()	Remove all event handlers.
void	removeEventHandler(String type, IEventHandler handler)	Removes event handler.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

eventHandlers

             protected Map<String,List<IEventHandler>> eventHandlers
            

Constructor Details

EventDispatcher

             public EventDispatcher()
            

Method Details

addEventHandler

             public void addEventHandler
             (String type, IEventHandler handler)
            

Description copied from interface: IEventDispatcher

Adds new event handler.

Specified by:

addEventHandler in interface IEventDispatcher

Parameters:

type - a type of event to be handled

handler - event handler

dispatchEvent

             public void dispatchEvent
             (Event event)
            

Description copied from interface: IEventDispatcher

Dispatches an event.

Specified by:

dispatchEvent in interface IEventDispatcher

Parameters:

event - the Event to be dispatched

dispatchEvent

             public void dispatchEvent
             (Event event, boolean delayed)
            

Description copied from interface: IEventDispatcher

Dispatches a delayed event. Sometimes event cannot be handled immediately because event handler has not been set yet. In this case event is placed into event ques of dispatcher and is waiting until handler is assigned.

Specified by:

dispatchEvent in interface IEventDispatcher

Parameters:

event - the Event to be dispatched

delayed - flag whether Event delayed or not

hasEventHandler

             public boolean hasEventHandler
             (String type)
            

Description copied from interface: IEventDispatcher

Checks if event dispatcher as an event handler assigned for a certain event type.

Specified by:

hasEventHandler in interface IEventDispatcher

Parameters:

type - a type of the Event

Returns:

true if event dispatcher as an event handler assigned for a certain event type

removeEventHandler

             public void removeEventHandler
             (String type, IEventHandler handler)
            

Description copied from interface: IEventDispatcher

Removes event handler.

Specified by:

removeEventHandler in interface IEventDispatcher

Parameters:

type - a type of the Event

handler - event handler IEventHandler

removeAllHandlers

             public void removeAllHandlers()
            

Description copied from interface: IEventDispatcher

Remove all event handlers.

Specified by:

removeAllHandlers in interface IEventDispatcher