Pee - Pass Event Emitter

Event emitter with some fancy shortcut.

• Emit events delayed.
• Route events.

Examples

Coffee-script example.

    {PassEventEmitter} = require 'PassEventEmitter'

    ee1 = new PassEventEmitter()
    ee1.on 'event', (e) -> console.log 'ee1', e
    ee2 = new PassEventEmitter()
    ee2.on 'event', (e) -> console.log 'ee2', e

    ee2.pass 'event', ee1

    ee1.emit 'event', 'data'

    ###
    Output is:
    ee1 data
    ee2 data
    ###

Javascript example.

    PassEventEmitter = require('PassEventEmitter').PassEventEmitter;

    ee1 = new PassEventEmitter();
    ee1.on('event', function (e) { console.log('ee1', e); });
    ee2 = new PassEventEmitter();
    ee2.on('event', function (e) { console.log('ee2', e); });

    ee2.pass('event', ee1);

    ee1.emit('event', 'data');

    /*
    Output is:
    ee1 data
    ee2 data
    */

API

PassEventEmitter is inherited form EventEmitter class so all of its functions are usable.

.emitLater(event, data, timeout)

.emitLater(event, data, timeout)

Emits the event delayed.

using pee | by hand --------- | ------- source.emitLater 'event', data, 100 | do (data) -> setTimeout (source.emit 'event', data), 100

.emitEvery(event, data, timeout)

.emitEvery(event, data, timeout)

Emits the event every timeout ms.

using pee | by hand --------- | ------- source.emitEvery 'event', data, 100 | do (data) -> setInterval (source.emit 'event', data), 100

.pass(events, targets)

.pass(events, targets)

Registers a delegate which emits the received event to target.

using pee | by hand --------- | ------- source.pass 'event', target | source.on 'event', (e) -> target.emit e source.pass 'e1 e2', target | source.on 'e1', (e) -> target.emit e source.on 'e2', (e) -> target.emit e source.pass 'e1 e2', t1, t2 or source.pass 'e1 e2', [t1, t2] | source.on 'e1', (e) -> t1.emit e source.on 'e2', (e) -> t1.emit e source.on 'e1', (e) -> t2.emit e source.on 'e2', (e) -> t2.emit e source.pass 'e1': t1, 'e2': t2 | source.on 'e1', (e) -> t1.emit e source.on 'e2', (e) -> t2.emit e

static PassEventEmitter.getGlobal()

PassEventEmitter.getGlobal() # Static call

Returns a global PassEventEmitter instance.

static PassEventEmitter.pass(class, events, targets)

PassEventEmitter.pass(class, events, targets) # Static call

If class is given, then it registers a route for a delegate which emits the received event to target. The route is created when an instance of class is created.

Note: If class is not given it passes the event to the global emitter. Same as PassEventEmitter.getGlobal().pass('e', pee).

using pee

class ClassA extends PassEventEmitter
target = new PassEventEmitter()
target.on 'event', (e) -> console.log 'target.event', e

PassEventEmitter.pass ClassA, 'event', target

new ClassA().emit 'event', 'a1'
new ClassA().emit 'event', 'a2'
new ClassA().emit 'event', 'a3'

PassEventEmitter.removeAllRoutes() # to avoid leak

###
Outputs
target.event a1
target.event a2
target.event a3
###

by hand

class ClassA extends EventEmitter
target = new EventEmitter()
target.on 'event', (e) -> console.log 'target.event', e

pass = (e) -> target.emit 'event', e

a1 = new ClassA()
a1.on 'event', pass
a1.emit 'event', 'a1'
a2 = new ClassA()
a2.on 'event', pass
a2.emit 'event', 'a2'
a3 = new ClassA()
a3.on 'event', pass
a3.emit 'event', 'a3'

###
Outputs
target.event a1
target.event a2
target.event a3
###

License

MIT

dist/PassEventEmitter.browser.min.js is generated with browserify, that uses a package with also an MIT license.