Page Comparison

Swiz

supports

the

use

of

the

Command

pattern

with

the

CommandMap

bean.

To

use

the

CommandMap

,

first

create

a

command

class:

public class MyCommand implements ICommand
{
	public function execute() : void
	{
		trace( "MyCommand.execute() called." );
	}
}
{code:as3}
\\

Your {{

Your execute()

method

contains

whatever

logic

you

want

the

command

to

perform.

Swiz

will

automatically

set

up

the

command

as

a

Prototype

Bean,

so

you

can

use

[Inject

]

to

inject

other

beans,

use

[Dispatcher

]

to

dispatch

an

event,

etc.

In

addition

to

the

ICommand

interface,

Swiz

also

provides

the

IEventAwareCommand

.

Implementing

this

interface

causes

the

event

which

triggers

the

command

to

be

set

into

your

command

object.

This

way,

data

associated

with

the

event

can

also

be

used

by

the

execute()

method:

public class MyCommand implements IEventAwareCommand
{
	private var _event : MyEvent;

	public function set event( value : Event ) : void
	{
		_event = value as MyEvent;
	}

	public function execute() : void
	{
		trace( "MyCommand.execute() called. Event info: " + _event.toString() );
	}
}
{code:as3}
\\

With the command class created, you can now write a CommandMap to associate the command with an event:

{code:as3}

With the command class created, you can now write a CommandMap to associate the command with an event:

public class MyCommandMap extends CommandMap
{
	override protected function mapCommands() : void
	{
		mapCommand( MyEvent.MY_EVENT_TYPE, MyCommand, MyEvent );
	}
}
{code:as3}
\\

As you can see, you override the {{mapCommands()}} method of {{CommandMap}}, and use {{mapCommand()}} to associate an event with the command. Whenever a matching event is processed by Swiz, the associated command will be executed.

Finally, add your CommandMap to one of your BeanProviders:

{code:xml}

As you can see, you override the mapCommands() method of CommandMap, and use mapCommand() to associate an event with the command. Whenever a matching event is processed by Swiz, the associated command will be executed.

Finally, add your CommandMap to one of your BeanProviders:

<swiz:BeanProvider>
	<command:MyCommandMap id="myCommandMap" />
</swiz:BeanProvider>
{code:xml}
\\

As 

As always,

make

sure

you've

added

the

correct

event

package

containing

your

event

to

the

Swiz

eventPackages

array.

That's

all

there

is

to

it.

Any

time

a

view

dispatches

a

bubbling

event

of

that

type,

or

you

use

the

Swiz

dispatcher

to

dispatch

that

event,

the

mapped

command

will

run.