Struct qmetaobject::connections::Signal

pub struct Signal<Args> { /* private fields */ }

High-level typed wrapper for a pointer to a C++/Qt signal.

While low-level SignalInner operated on pointers to ‘erased’ member functions types, this struct adds type-safe behavior on top of that.

Args is a type that matches the argument of the signal.

For example, a C++ signal with signature void (MyType::*)(int, QString) will be represented by the Signal<fn(int, QString)> type.

Implementations

impl<Args> Signal<Args>

pub unsafe fn new(inner: SignalInner) -> Self

Wraps low-level type-erased signal representation in a high-level types wrapper.

Safety

Caller must ensure that number, types and order of arguments strictly matches between signal represented by inner and Args. Passing incorrect information may result in Undefined Behavior.

Example

use cpp::cpp;
use qmetaobject::*;

fn object_name_changed() -> Signal<fn(QString)> {
    unsafe {
        Signal::new(cpp!([] -> SignalInner as "SignalInner"  {
            return &QObject::objectNameChanged;
        }))
    }
}

Trait Implementations

impl<Args> Clone for Signal<Args>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Args> Copy for Signal<Args>