108 lines
4.9 KiB
Python
108 lines
4.9 KiB
Python
from typing import Any, Callable, Optional, cast
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from typing_extensions import Self
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from ...binding import BindableProperty, bind, bind_from, bind_to
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from ...element import Element
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class DisableableElement(Element):
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enabled = BindableProperty(
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on_change=lambda sender, value: cast(Self, sender)._handle_enabled_change(value)) # pylint: disable=protected-access
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def __init__(self, **kwargs: Any) -> None:
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super().__init__(**kwargs)
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self.enabled = True
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self.ignores_events_when_disabled = True
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@property
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def is_ignoring_events(self) -> bool:
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"""Return whether the element is currently ignoring events."""
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if super().is_ignoring_events:
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return True
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return not self.enabled and self.ignores_events_when_disabled
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def enable(self) -> None:
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"""Enable the element."""
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self.enabled = True
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def disable(self) -> None:
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"""Disable the element."""
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self.enabled = False
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def bind_enabled_to(self,
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target_object: Any,
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target_name: str = 'enabled',
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forward: Optional[Callable[[Any], Any]] = None, *,
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strict: Optional[bool] = None,
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) -> Self:
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"""Bind the enabled state of this element to the target object's target_name property.
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The binding works one way only, from this element to the target.
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The update happens immediately and whenever a value changes.
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:param target_object: The object to bind to.
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:param target_name: The name of the property to bind to.
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:param forward: A function to apply to the value before applying it to the target (default: identity).
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:param strict: Whether to check (and raise) if the target object has the specified property (default: None,
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performs a check if the object is not a dictionary, *added in version 3.0.0*).
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"""
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bind_to(self, 'enabled', target_object, target_name, forward, self_strict=False, other_strict=strict)
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return self
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def bind_enabled_from(self,
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target_object: Any,
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target_name: str = 'enabled',
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backward: Optional[Callable[[Any], Any]] = None, *,
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strict: Optional[bool] = None,
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) -> Self:
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"""Bind the enabled state of this element from the target object's target_name property.
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The binding works one way only, from the target to this element.
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The update happens immediately and whenever a value changes.
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:param target_object: The object to bind from.
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:param target_name: The name of the property to bind from.
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:param backward: A function to apply to the value before applying it to this element (default: identity).
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:param strict: Whether to check (and raise) if the target object has the specified property (default: None,
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performs a check if the object is not a dictionary, *added in version 3.0.0*).
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"""
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bind_from(self, 'enabled', target_object, target_name, backward, self_strict=False, other_strict=strict)
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return self
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def bind_enabled(self,
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target_object: Any,
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target_name: str = 'enabled', *,
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forward: Optional[Callable[[Any], Any]] = None,
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backward: Optional[Callable[[Any], Any]] = None,
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strict: Optional[bool] = None,
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) -> Self:
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"""Bind the enabled state of this element to the target object's target_name property.
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The binding works both ways, from this element to the target and from the target to this element.
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The update happens immediately and whenever a value changes.
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The backward binding takes precedence for the initial synchronization.
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:param target_object: The object to bind to.
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:param target_name: The name of the property to bind to.
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:param forward: A function to apply to the value before applying it to the target (default: identity).
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:param backward: A function to apply to the value before applying it to this element (default: identity).
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:param strict: Whether to check (and raise) if the target object has the specified property (default: None,
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performs a check if the object is not a dictionary, *added in version 3.0.0*).
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"""
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bind(self, 'enabled', target_object, target_name,
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forward=forward, backward=backward,
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self_strict=False, other_strict=strict)
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return self
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def set_enabled(self, value: bool) -> None:
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"""Set the enabled state of the element."""
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self.enabled = value
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def _handle_enabled_change(self, enabled: bool) -> None:
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"""Called when the element is enabled or disabled.
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:param enabled: The new state.
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"""
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self._props['disable'] = not enabled
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