Trait wayland_backend::rs::server::ObjectData
source · pub trait ObjectData<D>: DowncastSync {
// Required methods
fn request(
self: Arc<Self>,
handle: &Handle,
data: &mut D,
client_id: ClientId,
msg: Message<ObjectId, OwnedFd>,
) -> Option<Arc<dyn ObjectData<D>>>;
fn destroyed(
self: Arc<Self>,
handle: &Handle,
data: &mut D,
client_id: ClientId,
object_id: ObjectId,
);
// Provided method
fn debug(&self, f: &mut Formatter<'_>) -> Result { ... }
}
Expand description
A trait representing your data associated to an object
You will only be given access to it as a &
reference, so you
need to handle interior mutability by yourself.
The methods of this trait will be invoked internally every time a new object is created to initialize its data.
Required Methods§
sourcefn request(
self: Arc<Self>,
handle: &Handle,
data: &mut D,
client_id: ClientId,
msg: Message<ObjectId, OwnedFd>,
) -> Option<Arc<dyn ObjectData<D>>>
fn request( self: Arc<Self>, handle: &Handle, data: &mut D, client_id: ClientId, msg: Message<ObjectId, OwnedFd>, ) -> Option<Arc<dyn ObjectData<D>>>
Dispatch a request for the associated object
If the request has a NewId
argument, the callback must return the object data
for the newly created object
Provided Methods§
Implementations§
source§impl<D> dyn ObjectData<D>where
D: Any + 'static,
impl<D> dyn ObjectData<D>where
D: Any + 'static,
sourcepub fn is<__T: ObjectData<D>>(&self) -> bool
pub fn is<__T: ObjectData<D>>(&self) -> bool
Returns true if the trait object wraps an object of type __T
.
sourcepub fn downcast<__T: ObjectData<D>>(
self: Box<Self>,
) -> Result<Box<__T>, Box<Self>>
pub fn downcast<__T: ObjectData<D>>( self: Box<Self>, ) -> Result<Box<__T>, Box<Self>>
Returns a boxed object from a boxed trait object if the underlying object is of type
__T
. Returns the original boxed trait if it isn’t.
sourcepub fn downcast_rc<__T: ObjectData<D>>(
self: Rc<Self>,
) -> Result<Rc<__T>, Rc<Self>>
pub fn downcast_rc<__T: ObjectData<D>>( self: Rc<Self>, ) -> Result<Rc<__T>, Rc<Self>>
Returns an Rc
-ed object from an Rc
-ed trait object if the underlying object is of
type __T
. Returns the original Rc
-ed trait if it isn’t.
sourcepub fn downcast_ref<__T: ObjectData<D>>(&self) -> Option<&__T>
pub fn downcast_ref<__T: ObjectData<D>>(&self) -> Option<&__T>
Returns a reference to the object within the trait object if it is of type __T
, or
None
if it isn’t.
sourcepub fn downcast_mut<__T: ObjectData<D>>(&mut self) -> Option<&mut __T>
pub fn downcast_mut<__T: ObjectData<D>>(&mut self) -> Option<&mut __T>
Returns a mutable reference to the object within the trait object if it is of type
__T
, or None
if it isn’t.
sourcepub fn downcast_arc<__T: ObjectData<D> + Any + Send + Sync>(
self: Arc<Self>,
) -> Result<Arc<__T>, Arc<Self>>
pub fn downcast_arc<__T: ObjectData<D> + Any + Send + Sync>( self: Arc<Self>, ) -> Result<Arc<__T>, Arc<Self>>
Returns an Arc
-ed object from an Arc
-ed trait object if the underlying object is of
type __T
. Returns the original Arc
-ed trait if it isn’t.