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|
//! Component events.
use std::fmt::{Debug, Formatter};
use std::marker::PhantomData;
use ecs_macros::Component;
use crate::component::Component;
/// Event emitted when:
/// a) A entity with component `ComponentT` is spawned.
/// b) A component `ComponentT` is added to a entity.
#[derive(Clone, Component)]
pub struct Added<ComponentT>
where
ComponentT: Component,
{
_pd: PhantomData<ComponentT>,
}
impl<ComponentT> Debug for Added<ComponentT>
where
ComponentT: Component,
{
fn fmt(&self, formatter: &mut Formatter<'_>) -> std::fmt::Result
{
formatter
.debug_struct("Added")
.field("_pd", &self._pd)
.finish()
}
}
impl<ComponentT> Default for Added<ComponentT>
where
ComponentT: Component,
{
fn default() -> Self
{
Self { _pd: PhantomData }
}
}
/// Event emitted when a `ComponentT` component is removed from a entity.
#[derive(Clone, Component)]
pub struct Removed<ComponentT>
where
ComponentT: Component,
{
_pd: PhantomData<ComponentT>,
}
impl<ComponentT> Debug for Removed<ComponentT>
where
ComponentT: Component,
{
fn fmt(&self, formatter: &mut Formatter<'_>) -> std::fmt::Result
{
formatter
.debug_struct("Removed")
.field("_pd", &self._pd)
.finish()
}
}
impl<ComponentT> Default for Removed<ComponentT>
where
ComponentT: Component,
{
fn default() -> Self
{
Self { _pd: PhantomData }
}
}
|
