com.itextpdf.commons.actions

Class EventManager

java.lang.Object

com.itextpdf.commons.actions.EventManager

public final class EventManager
extends Object

Entry point for event handling mechanism. Class is a singleton, see getInstance().

Method Summary

Modifier and Type	Method and Description
static void	acknowledgeAgplUsageDisableWarningMessage() Deliberately turns off the warning message about AGPL usage.
static EventManager	createNewInstance() Creates a new instance of EventManager, it should be used for dedicated event usage.
static EventManager	getInstance() Allows access to the default instance of EventManager.
boolean	isRegistered(IEventHandler handler) Check if the handler was registered for event handling process.
void	onEvent(IEvent event) Handles the event.
void	register(IEventHandler handler) Add new IEventHandler to the event handling process.
boolean	unregister(IEventHandler handler) Removes handler from event handling process.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static EventManager getInstance()

Allows access to the default instance of EventManager.

Returns:

the default instance of the class

createNewInstance

public static EventManager createNewInstance()

Creates a new instance of EventManager, it should be used for dedicated event usage.

Returns:

a new instance of the class

acknowledgeAgplUsageDisableWarningMessage

public static void acknowledgeAgplUsageDisableWarningMessage()

Deliberately turns off the warning message about AGPL usage.

Important note. Calling of this method means that the terms of AGPL license are met.

onEvent

public void onEvent(IEvent event)

Handles the event.

Parameters:

event - to handle

register

public void register(IEventHandler handler)

Add new IEventHandler to the event handling process.

Parameters:

handler - is a handler to add

isRegistered

public boolean isRegistered(IEventHandler handler)

Check if the handler was registered for event handling process.

Parameters:

handler - is a handler to check

Returns:

true if handler has been already registered and false otherwise

unregister

public boolean unregister(IEventHandler handler)

Removes handler from event handling process.

Parameters:

handler - is a handle to remove

Returns:

true if the handler had been registered previously and was removed. False if the handler was not found among registered handlers