✏️ Editing: tkinterscheduler.py Read Only

from typing import Any, Optional, TypeVar

from reactivex import abc, typing
from reactivex.disposable import (
    CompositeDisposable,
    Disposable,
    SingleAssignmentDisposable,
)

from ..periodicscheduler import PeriodicScheduler

_TState = TypeVar("_TState")

class TkinterScheduler(PeriodicScheduler):
    """A scheduler that schedules work via the Tkinter main event loop.

http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/universal.html
    http://effbot.org/tkinterbook/widget.htm"""

def __init__(self, root: Any) -> None:
        """Create a new TkinterScheduler.

Args:
            root: The Tk instance to use; typically, you would get this by
                import tkinter; tkinter.Tk()
        """

super().__init__()
        self._root = root

def schedule(
        self, action: typing.ScheduledAction[_TState], state: Optional[_TState] = None
    ) -> abc.DisposableBase:
        """Schedules an action to be executed.

Args:
            action: Action to be executed.
            state: [Optional] state to be given to the action function.

Returns:
            The disposable object used to cancel the scheduled action
            (best effort).
        """

return self.schedule_relative(0.0, action, state)

def schedule_relative(
        self,
        duetime: typing.RelativeTime,
        action: typing.ScheduledAction[_TState],
        state: Optional[_TState] = None,
    ) -> abc.DisposableBase:
        """Schedules an action to be executed after duetime.

Args:
            duetime: Relative time after which to execute the action.
            action: Action to be executed.
            state: [Optional] state to be given to the action function.

Returns:
            The disposable object used to cancel the scheduled action
            (best effort).
        """

sad = SingleAssignmentDisposable()

def invoke_action() -> None:
            sad.disposable = self.invoke_action(action, state=state)

msecs = max(0, int(self.to_seconds(duetime) * 1000.0))
        timer = self._root.after(msecs, invoke_action)

def dispose() -> None:
            self._root.after_cancel(timer)

return CompositeDisposable(sad, Disposable(dispose))

def schedule_absolute(
        self,
        duetime: typing.AbsoluteTime,
        action: typing.ScheduledAction[_TState],
        state: Optional[_TState] = None,
    ) -> abc.DisposableBase:
        """Schedules an action to be executed at duetime.

Args:
            duetime: Absolute time at which to execute the action.
            action: Action to be executed.
            state: [Optional] state to be given to the action function.

Returns:
            The disposable object used to cancel the scheduled action
            (best effort).
        """

duetime = self.to_datetime(duetime)
        return self.schedule_relative(duetime - self.now, action, state=state)

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