Imeachtaí#

Réamhrá#

Ligeann imeachtaí duit feidhmeanna a rith go comhthreomhar. In ionad feidhmeanna a ghlaoch go seicheamhach, is féidir leat ilfheidhmeanna a chlárú le himeacht agus iad go léir a spreagadh ag an am céanna. Ritheann gach feidhm chláraithe ina snáithe féin, rud a chuireann ar chumas do róbait ilchúraimí a dhéanamh ag an am céanna—mar shampla luachanna a thaispeáint ar an scáileán agus é ag tiomáint.

Chun Imeacht a chruthú agus a úsáid ansin, lean na céimeanna seo san ord ceart:

  1. Cruthaigh an imeacht le Event.

  2. Cláraigh feidhm le spreagadh nuair a chraoltar an Event trí ghlaoch ar an event réad leis an bhfeidhm mar argóint.

  3. Broadcast an Event:

    • broadcast — Spreagann sé seo gach feidhm chláraithe i réad imeachta le rith ag an am céanna.

    • broadcast_and_wait — Cuireann sé seo gach feidhm chláraithe i réad imeachta i ngníomh agus fanann sé go mbeidh siad críochnaithe sula leanann sé ar aghaidh.

Cruthaigh Imeacht#

Cruthaíonn Event réad imeachta a bhainistíonn forghníomhú feidhme i snáitheanna ar leithligh.

Usage:
Event()

Paraiméadar

Cur síos

Níl aon pharaiméadair ag an tógálaí seo.

 
# Blink the screen while moving forward
# Create move_event as an Event object
move_event = Event()

def blink_screen():
    while True:
        brain.screen.clear_screen(Color.RED)
        wait(0.5, SECONDS)
        brain.screen.clear_screen()
        wait(0.5, SECONDS)

move_event(blink_screen)
move_event.broadcast()
drivetrain.drive(FORWARD)

Cláraigh Feidhmeanna le hImeacht#

Nuair a chláraíonn tú feidhm le himeacht, déanfar í a fhorghníomhú i snáithe ar leith nuair a chraoltar an t-imeacht.

Usage:
event(callback, args)

Paraiméadar

Cur síos

event

Ainm an réada imeachta a cruthaíodh roimhe seo.

callback

Feidhm atá sainmhínithe roimhe seo le forghníomhú nuair a chraoltar an ócáid.

args

Roghnach. Tupla argóintí le seoladh chuig an bhfeidhm athghlaoite.

 
# Blink the screen while turning
move_event = Event()

def blink_screen():
    while True:
        brain.screen.clear_screen(Color.RED)
        wait(0.5, SECONDS)
        brain.screen.clear_screen()
        wait(0.5, SECONDS)

def turning():
    drivetrain.turn(RIGHT)

# Register multiple functions to the Event object
move_event(blink_screen)
move_event(turning)

move_event.broadcast()


# Move in a specified direction
move_event = Event()

def move_distance(movement_angle):
    drivetrain.turn_for(RIGHT, movement_angle, DEGREES)
    drivetrain.drive_for(FORWARD, 100, MM)

# Change the parameter to modify how the robot moves
move_event(move_distance, (180,))
move_event.broadcast()

Craoladh Imeacht#

broadcast#

broadcast spreagann imeacht, ag tosú gach feidhm chláraithe i snáitheanna ar leithligh. Ní chuireann an modh seo sos ar fhorghníomhú aon fheidhmeanna ina dhiaidh sin.

Usage:
event.broadcast()

Paraiméadar

Cur síos

event

Ainm an réada imeachta a cruthaíodh roimhe seo.

 
# Blink the screen while moving forward
# Create move_event as an Event object
move_event = Event()

def blink_screen():
    while True:
        brain.screen.clear_screen(Color.RED)
        wait(0.5, SECONDS)
        brain.screen.clear_screen()
        wait(0.5, SECONDS)

move_event(blink_screen)
move_event.broadcast()
drivetrain.drive(FORWARD)

broadcast_and_wait#

broadcast_and_wait Tosaíonn imeacht ach fanann sé go mbeidh na feidhmeanna cláraithe go léir críochnaithe sula leanann sé ar aghaidh le feidhmeanna ina dhiaidh sin.

Usage:
event.broadcast_and_wait()

Paraiméadar

Cur síos

event

Ainm an réada imeachta a cruthaíodh roimhe seo.

 
# Move after the screen is pressed
move_event = Event()

def move_and_turn():
    drivetrain.drive_for(FORWARD, 150, MM)
    drivetrain.turn_for(RIGHT, 90)

move_event(move_and_turn)

while True:
    if brain.buttonCheck.pressing():
        move_event.broadcast_and_wait()
        break
brain.screen.print("Movement done.")
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