ej.microui.event

Class Event

java.lang.Object

ej.microui.event.Event

public class Event
extends Object

MicroUI features int-based events, allowing for a rich event mechanism compatible with scare resources. This class provides EventGenerator classes with event constants and helper methods to build and analyse events.

An event has a type, a 8-bit figure that forms the most significant byte of the int-event, followed by 8-bits which is the generator identifier quantity, and followed by 16-bit of data.

event : type (8-bit) + generatorId (8-bit) + data (16-bit)

The very first 16 types [0x00..0x0f], some of which are defined by constants in EventGenerator subclasses, are MicroUI reserved. An application may create as many as 240 different kind of events.

See Also:

EventGenerator

Method Summary

Modifier and Type	Method and Description
static int	buildEvent(int type, EventGenerator gen, int data) Builds an event from a given type, an eventGenerator and data.
static int	getData(int event) Returns the event's data issued by a generator.
static EventGenerator	getGenerator(int event) Gets a converter out of an event assuming the event has been generated by an EventGenerator that has been previously added to the system pool.
static int	getGeneratorId(int event) Returns the event's generator identifier.
static int	getType(int event) Returns the type of an event.

Methods inherited from class java.lang.Object

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

Method Detail

buildEvent

public static int buildEvent(int type,
                             EventGenerator gen,
                             int data)

Builds an event from a given type, an eventGenerator and data.

type and data must respect the format (respectively 0x0 to 0xff and 0x0 to 0xffff). No check is performed at runtime, only a crop is performed.

Parameters:

type - the type of the event to build

gen - the generator associated with the event

data - the data of the event to build

Returns:

the event as an int

getData

public static int getData(int event)

Returns the event's data issued by a generator.

Parameters:

event - an event

Returns:

event's data as an int

getGenerator

public static EventGenerator getGenerator(int event)

Gets a converter out of an event assuming the event has been generated by an EventGenerator that has been previously added to the system pool.

Parameters:

event - an event

Returns:

the event generator or null.

Throws:

IllegalArgumentException - if there is no generator associated to this event.

MicroUIException - if MicroUI is not started

See Also:

EventGenerator.addToSystemPool()

getGeneratorId

public static int getGeneratorId(int event)

Returns the event's generator identifier.

Parameters:

event - an event

Returns:

event's generator as an int

getType

public static int getType(int event)

Returns the type of an event.

Parameters:

event - an event

Returns:

event's type as an int