Trait GCDevicePhysicalInputStateDiff 

pub unsafe trait GCDevicePhysicalInputStateDiff: NSObjectProtocol {
    // Provided methods
    unsafe fn changeForElement(
        &self,
        element: &ProtocolObject<dyn GCPhysicalInputElement>,
    ) -> GCDevicePhysicalInputElementChange
       where Self: Sized + Message { ... }
    unsafe fn changedElements(
        &self,
    ) -> Option<Retained<NSEnumerator<ProtocolObject<dyn GCPhysicalInputElement>>>>
       where Self: Sized + Message { ... }
}

Available on crate feature GCDevicePhysicalInputStateDiff only.

An object conforming to the GCDevicePhysicalInputStateDiffprotocol contains the input state differences between the current and previous GCDevicePhysicalInputStateobjects returned from the -nextInputStatemethod of GCDevicePhysicalInput.

See also Apple’s documentation

Provided Methods

unsafe fn changeForElement( &self, element: &ProtocolObject<dyn GCPhysicalInputElement>, ) -> GCDevicePhysicalInputElementChange

where Self: Sized + Message,

Available on crate feature GCPhysicalInputElement only.

Check if a value of _element_changed, compared the previous input state.

Parameter element: The element to check. This may be a pointer to either the “live” element from the device’s physical input, or a pointer to an element from any input state “snapshot” of the device’s physical input.

unsafe fn changedElements( &self, ) -> Option<Retained<NSEnumerator<ProtocolObject<dyn GCPhysicalInputElement>>>>

where Self: Sized + Message,

Available on crate feature GCPhysicalInputElement only.

Gets an enumerator that iterates over the elements that have changed, compared the previous input state.

This method returns nilif the changed elements could not be determined - typically because the input state queue filled up and older input state snapshots were dropped.

Safety

The returned enumerator’s underlying collection should not be mutated while in use.

Trait Implementations

impl ProtocolType for dyn GCDevicePhysicalInputStateDiff

const NAME: &'static str = "GCDevicePhysicalInputStateDiff"

The name of the Objective-C protocol that this type represents.

fn protocol() -> Option<&'static AnyProtocol>

Get a reference to the Objective-C protocol object that this type represents.

impl<T> ImplementedBy<T> for dyn GCDevicePhysicalInputStateDiff

where T: ?Sized + Message + GCDevicePhysicalInputStateDiff,

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T> GCDevicePhysicalInputStateDiff for ProtocolObject<T>

where T: ?Sized + GCDevicePhysicalInputStateDiff,

Implementors