WinEmitter

This structure provides the gate of emitters.

Signature of WinEmitter

List of Import References :
See BOOL
See BTUnion
See Char
See Com
See DENOTATION
See Int
See Nat
See Option
See Real
See Seq
See Set
See String
See Void
See WinConfig
See WinEvent
See WinInternal
See WinTclTk

SIGNATURE WinEmitter[data]

$Date: 2010-09-30 18:24:17 +0200 (Do, 30. Sep 2010) $ ($Revision: 616 $)

SORT data

IMPORT  Com[emitter]            ONLY com
        Com[data]               ONLY com
        Void                    ONLY void
        Com[void]               ONLY com

IMPORT  
        WinInternal             ONLY wconfig:SORT config:SORT
        WinEvent                ONLY event:SORT

An emitter is just an asynchronous channel: each time it is triggered with a value it asynchronously throws out the given value.

SORT emitter

FUN  emitter    : com[emitter]
FUN  emit       : emitter ** data       -> com[void]
FUN  await      : emitter               -> com[data]

An emitter may be attached to a view like a button via its configuration. Each time the button is pressed, the emitter is triggered. The configuration bind(E, X) is equivalent to bind'WinButton(emit(E, X)).

FUN  bind       : emitter ** data       -> config

An emitter may be also bound to an event associated with a view, the window or the entire application. The configuration bind(Event, E, X) is equivalent to bind'WinEvent(bind(Event, emit(E, X)), and so on.

FUN   bind      : event ** emitter ** data              -> config
FUN   bind      : event ** emitter ** data              -> wconfig
FUN   bind      : event ** emitter ** data              -> com[void]

next node: WinSelector,
prev node: WinMenu,
up to node: Subsystem Opal Windows