Trait QRustProxy 

pub trait QRustProxy {
    type ProxyCppType;
    type AdapterType: ?Sized;

    // Required methods
    fn new<OnDropFn: FnOnce() + 'static>(
        rust_obj: &Rc<RefCell<Self::AdapterType>>,
        construction: ConstructionMode,
        on_drop: OnDropFn,
    ) -> *mut Self;
    fn get_static_meta_object() -> &'static QMetaObject;
    fn get_size_of_cpp_proxy() -> usize;
    fn get_align_of_cpp_proxy() -> usize;
    fn get_qmetatype_list_of_cpp_proxy() -> QMetaType;
    fn get_cpp_proxy(&self) -> *const Self::ProxyCppType;
    fn get_cpp_proxy_mut(&self) -> *mut Self::ProxyCppType;
}

QRustProxy defines the Rust-side bridge object that binds:

• A Rust object stored in Rc<RefCell<dyn _>>
• A corresponding C++ QObject-based proxy

Implementations of this trait are the concrete glue layer between Rust and Qt, usually using Cxx.

Purpose

A QRustProxy implementation:

• Stores a raw pointer to the C++ proxy (cpp_proxy)
• Stores access to the Rust object through RustObjAccess<dyn _> (rust_obj)
• Coordinates destruction, layout and Qt meta-object information
• Forwards all foreign function calls to the C++ proxy

Typical structure:

pub struct QObjectProxyRust {
    cpp_proxy: *mut QObjectProxyCpp,
    rust_obj: RustObjAccess<dyn QObjectProxyGet>,
    on_drop: fn(rust_obj: *const u8),
}

Where:

• cpp_proxy points to the actual C++ QObject subclass.
• rust_obj wraps access to the users rust object.
• on_drop cleaning up memory.

Associated Types

ProxyCppType

The concrete C++ proxy type.

RcRefCellType

The Rust container type holding the actual object, typically:

Rc<RefCell<dyn MarkerTrait>>

The MarkerTrait is implemented on the users rust struct by the qobject macro.

Required Associated Types

type ProxyCppType

type AdapterType: ?Sized

Required Methods

fn new<OnDropFn: FnOnce() + 'static>( rust_obj: &Rc<RefCell<Self::AdapterType>>, construction: ConstructionMode, on_drop: OnDropFn, ) -> *mut Self

fn get_static_meta_object() -> &'static QMetaObject

fn get_size_of_cpp_proxy() -> usize

fn get_align_of_cpp_proxy() -> usize

fn get_qmetatype_list_of_cpp_proxy() -> QMetaType

fn get_cpp_proxy(&self) -> *const Self::ProxyCppType

fn get_cpp_proxy_mut(&self) -> *mut Self::ProxyCppType

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors