Struct LayoutCallback 

#[repr(C)]
pub struct LayoutCallback {
    pub cb: LayoutCallbackType,
    pub ctx: OptionRefAny,
}

Wrapper around the layout callback

For FFI languages (Python, Java, etc.), the RefAny contains both:

• The user’s application data
• The callback function object from the foreign language

The trampoline function (stored in cb) knows how to extract both from the RefAny and invoke the foreign callback with the user data.

Fields

cb: LayoutCallbackType

ctx: OptionRefAny

For FFI: stores the foreign callable (e.g., PyFunction) Native Rust code sets this to None

Implementations

impl LayoutCallback

pub fn create<I: Into<Self>>(cb: I) -> Self

impl LayoutCallback

pub fn create_from_host_handle(handle: u64) -> Self

Build a wrapper whose cb is the static thunk above and whose ctx carries the host’s u64 handle. The host language is responsible for keeping its id→callable table in sync with the releaser registered via AzApp_setHostHandleReleaser.

Trait Implementations

impl Clone for LayoutCallback

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LayoutCallback

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LayoutCallback

fn default() -> Self

Returns the “default value” for a type.

impl Display for LayoutCallback

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<extern "C" fn(RefAny, LayoutCallbackInfo) -> Dom> for LayoutCallback

Allow creating callback from a raw function pointer Sets callable to None (for native Rust/C usage)

fn from(cb: LayoutCallbackType) -> Self

Converts to this type from the input type.

impl Hash for LayoutCallback

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for LayoutCallback

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for LayoutCallback

fn eq(&self, rhs: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for LayoutCallback

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for LayoutCallback