org.pepstock.charba.client.events

Class HandlerManager

java.lang.Object

org.pepstock.charba.client.events.HandlerManager

Direct Known Subclasses:

AbstractChart

public abstract class HandlerManager
extends Object

Manager to add, remove event handlers and firing events to registered handlers.
This is currently implemented by all charts.

Author:

Andrea "Stock" Stocchero

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	HandlerManager() Creates an empty handler manager

Method Summary

Modifier and Type	Method and Description
HandlerRegistration	addHandler(EventHandler handler, EventType type) Adds a event handler.
void	fireEvent(Event event) Fires the event to the handlers.
int	getHandlerCount(EventType type) Returns the amount of handlers for a specific event type.
protected abstract IsChart	getSource() Returns a chart instance as source for all events.
boolean	isEventHandled(EventType type) Returns true if there is any event handler for event type passed as argument.

Methods inherited from class java.lang.Object

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

Constructor Detail

HandlerManager

protected HandlerManager()

Creates an empty handler manager

Method Detail

getSource

protected abstract IsChart getSource()

Returns a chart instance as source for all events.

Returns:

a chart instance as source for all events

addHandler

public HandlerRegistration addHandler(EventHandler handler,
                                      EventType type)

Adds a event handler.

Parameters:

handler - handler instance to add

type - the event type associated with handler

Returns:

the handler registration in order to remove the handler later

fireEvent

public void fireEvent(Event event)

Fires the event to the handlers.

Parameters:

event - the event to fire

getHandlerCount

public final int getHandlerCount(EventType type)

Returns the amount of handlers for a specific event type.

Parameters:

type - event type to use to get the amount of handlers

Returns:

the amount of handlers for a specific event type

isEventHandled

public final boolean isEventHandled(EventType type)

Returns true if there is any event handler for event type passed as argument.

Parameters:

type - event type to check

Returns:

true if there is any event handler for event type passed as argument