from __future__ import annotations
from typing import Any, cast, TYPE_CHECKING
from ooodev.events.args.generic_args import GenericArgs
from ooodev.events.args.listener_event_args import ListenerEventArgs
from ooodev.utils import gen_util as gUtil
from ooodev.adapter.awt.text_listener import TextListener
if TYPE_CHECKING:
from com.sun.star.awt import XTextComponent
from ooodev.utils.type_var import EventArgsCallbackT, ListenerEventCallbackT
[docs]class TextEvents:
"""
Class for managing Text Events.
This class is usually inherited by control classes that implement ``com.sun.star.awt.XTextListener``.
"""
[docs] def __init__(
self,
trigger_args: GenericArgs | None = None,
cb: ListenerEventCallbackT | None = None,
listener: TextListener | None = None,
subscriber: XTextComponent | None = None,
) -> None:
"""
Constructor
Args:
trigger_args (GenericArgs, optional): Args that are passed to events when they are triggered.
This only applies if the listener is not passed.
cb (ListenerEventCallbackT | None, optional): Callback that is invoked when an event is added or removed.
listener (TextListener | None, optional): Listener that is used to manage events.
subscriber (XTextComponent, optional): An UNO object that implements the ``XTextComponent`` interface.
If passed in then this instance listener is automatically added to it.
"""
self.__callback = cb
if listener:
self.__listener = listener
if subscriber:
subscriber.addTextListener(self.__listener)
else:
self.__listener = TextListener(trigger_args=trigger_args, subscriber=subscriber)
self.__name = gUtil.Util.generate_random_string(10)
# region Manage Events
[docs] def add_event_text_changed(self, cb: EventArgsCallbackT) -> None:
"""
Adds a listener for an event.
Event is invoked when the text has changed.
The callback ``EventArgs.event_data`` will contain a UNO ``com.sun.star.awt.TextEvent`` struct.
"""
# sourcery skip: class-extract-method
if self.__callback:
args = ListenerEventArgs(source=self.__name, trigger_name="textChanged")
self.__callback(self, args)
if args.remove_callback:
self.__callback = None
self.__listener.on("textChanged", cb)
[docs] def add_event_text_events_disposing(self, cb: EventArgsCallbackT) -> None:
"""
Adds a listener for an event.
Event is invoked when the broadcaster is about to be disposed.
The callback ``EventArgs.event_data`` will contain a UNO ``com.sun.star.lang.EventObject`` struct.
"""
if self.__callback:
args = ListenerEventArgs(source=self.__name, trigger_name="disposing")
self.__callback(self, args)
if args.remove_callback:
self.__callback = None
self.__listener.on("disposing", cb)
[docs] def remove_event_text_changed(self, cb: EventArgsCallbackT) -> None:
"""
Removes a listener for an event
"""
if self.__callback:
args = ListenerEventArgs(source=self.__name, trigger_name="textChanged", is_add=False)
self.__callback(self, args)
if args.remove_callback:
self.__callback = None
self.__listener.off("textChanged", cb)
[docs] def remove_event_text_events_disposing(self, cb: EventArgsCallbackT) -> None:
"""
Removes a listener for an event
"""
if self.__callback:
args = ListenerEventArgs(source=self.__name, trigger_name="disposing", is_add=False)
self.__callback(self, args)
if args.remove_callback:
self.__callback = None
self.__listener.off("disposing", cb)
@property
def events_listener_text(self) -> TextListener:
"""
Returns listener
"""
return self.__listener
# endregion Manage Events
[docs]def on_lazy_cb(source: Any, event: ListenerEventArgs) -> None:
"""
Callback that is invoked when an event is added or removed.
This method is generally used to add the listener to the component in a lazy manner.
This means this callback will only be called once in the lifetime of the component.
Args:
source (Any): Expected to be an instance of TextEvents that is a partial class of a component based class.
event (ListenerEventArgs): Event arguments.
Returns:
None:
Warning:
This method is intended for internal use only.
"""
# will only ever fire once
if not isinstance(source, TextEvents):
return
if not hasattr(source, "component"):
return
comp = cast("XTextComponent", source.component) # type: ignore
comp.addTextListener(source.events_listener_text)
event.remove_callback = True