nicegui/nicegui/event_listener.py

import uuid
from dataclasses import dataclass, field
from typing import Any, Callable, Dict, List

from .helpers import KWONLY_SLOTS


@dataclass(**KWONLY_SLOTS)
class EventListener:
    id: str = field(init=False)
    element_id: int
    type: str
    args: List[str]
    handler: Callable
    throttle: float
    leading_events: bool
    trailing_events: bool

    def __post_init__(self) -> None:
        self.id = str(uuid.uuid4())

    def to_dict(self) -> Dict[str, Any]:
        words = self.type.split('.')
        type = words.pop(0)
        specials = [w for w in words if w in {'capture', 'once', 'passive'}]
        modifiers = [w for w in words if w in {'stop', 'prevent', 'self', 'ctrl', 'shift', 'alt', 'meta'}]
        keys = [w for w in words if w not in specials + modifiers]
        return {
            'listener_id': self.id,
            'type': type,
            'specials': specials,
            'modifiers': modifiers,
            'keys': keys,
            'args': self.args,
            'throttle': self.throttle,
            'leading_events': self.leading_events,
            'trailing_events': self.trailing_events,
        }