Struct GCControllerElement

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#[repr(C)]
pub struct GCControllerElement { /* private fields */ }
Available on crate feature GCControllerElement only.
Expand description

Every controller element knows which collection it belongs to and whether its input value is analog or digital.

See also Apple’s documentation

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impl GCControllerElement

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pub unsafe fn collection(&self) -> Option<Retained<GCControllerElement>>

Each element can be part of a wider collection of inputs that map to a single logical element. A directional pad (dpad) is a logical collection of two axis inputs and thus each axis belongs to the same collection element - the dpad.

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pub unsafe fn isAnalog(&self) -> bool

Check if the element can support more than just digital values, such as decimal ranges between 0 and 1. Defaults to YES for most elements.

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pub unsafe fn isBoundToSystemGesture(&self) -> bool

Check if the element is bound to a system gesture. Defaults to NO for most elements.

See: preferredSystemGestureState

See: GCSystemGestureState

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pub unsafe fn preferredSystemGestureState(&self) -> GCSystemGestureState

The preferred system gesture state for this element. Defaults to GCSystemGestureStateEnabled for most elements

Note: This is merely the preferred system gesture state - it is not guaranteed to be respected by the system.

Note: It is highly recommended to leave this set to the default value, however there may be situations (for example, game streaming apps) where it is preferrable to disable system gestures.

See: boundToSystemGesture

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pub unsafe fn setPreferredSystemGestureState( &self, preferred_system_gesture_state: GCSystemGestureState, )

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pub unsafe fn sfSymbolsName(&self) -> Option<Retained<NSString>>

The element’s SF Symbols name, taking input remapping into account.

Note: In almost all instances, you should use this over unmappedSfSymbolsName in your UI.

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pub unsafe fn setSfSymbolsName(&self, sf_symbols_name: Option<&NSString>)

Setter for sfSymbolsName.

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pub unsafe fn localizedName(&self) -> Option<Retained<NSString>>

The element’s localized name, taking input remapping into account.

Note: In almost all instances, you should use this over unmappedLocalizedName in your UI.

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pub unsafe fn setLocalizedName(&self, localized_name: Option<&NSString>)

Setter for localizedName.

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pub unsafe fn unmappedSfSymbolsName(&self) -> Option<Retained<NSString>>

The element’s SF Symbols name, not taking any input remapping into account.

Note: Use this in your games own remapping UI, or when you need to prompt a user that a given button has no mapping (sfSymbolsName is nil).

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pub unsafe fn setUnmappedSfSymbolsName( &self, unmapped_sf_symbols_name: Option<&NSString>, )

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pub unsafe fn unmappedLocalizedName(&self) -> Option<Retained<NSString>>

The element’s localized name, not taking any input remapping into account.

Note: Use this in your games own remapping UI, or when you need to prompt a user that a given button has no mapping (localizedName is nil).

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pub unsafe fn setUnmappedLocalizedName( &self, unmapped_localized_name: Option<&NSString>, )

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pub unsafe fn aliases(&self) -> Retained<NSSet<NSString>>

A set of aliases that can be used to access this element with keyed subscript notation.

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impl GCControllerElement

Methods declared on superclass NSObject.

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pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

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pub unsafe fn new() -> Retained<Self>

Methods from Deref<Target = NSObject>§

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pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>§

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pub fn class(&self) -> &'static AnyClass

Dynamically find the class of this object.

§Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

§Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());
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pub unsafe fn get_ivar<T>(&self, name: &str) -> &T
where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Use Ivar::load instead.

§Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

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pub fn downcast_ref<T>(&self) -> Option<&T>
where T: DowncastTarget,

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

§Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

§Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

§Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

§Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}

Trait Implementations§

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impl AsRef<AnyObject> for GCControllerElement

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fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<GCControllerElement> for GCControllerAxisInput

Available on crate feature GCControllerAxisInput only.
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fn as_ref(&self) -> &GCControllerElement

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<GCControllerElement> for GCControllerButtonInput

Available on crate feature GCControllerButtonInput only.
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fn as_ref(&self) -> &GCControllerElement

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<GCControllerElement> for GCControllerDirectionPad

Available on crate feature GCControllerDirectionPad only.
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fn as_ref(&self) -> &GCControllerElement

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<GCControllerElement> for GCControllerElement

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fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<GCControllerElement> for GCControllerTouchpad

Available on crate feature GCControllerTouchpad only.
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fn as_ref(&self) -> &GCControllerElement

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<GCControllerElement> for GCDeviceCursor

Available on crate features GCControllerDirectionPad and GCDeviceCursor only.
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fn as_ref(&self) -> &GCControllerElement

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<GCControllerElement> for GCDualSenseAdaptiveTrigger

Available on crate features GCControllerButtonInput and GCDualSenseAdaptiveTrigger only.
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fn as_ref(&self) -> &GCControllerElement

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<NSObject> for GCControllerElement

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fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.
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impl Borrow<AnyObject> for GCControllerElement

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fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value. Read more
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impl Borrow<GCControllerElement> for GCControllerAxisInput

Available on crate feature GCControllerAxisInput only.
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fn borrow(&self) -> &GCControllerElement

Immutably borrows from an owned value. Read more
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impl Borrow<GCControllerElement> for GCControllerButtonInput

Available on crate feature GCControllerButtonInput only.
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fn borrow(&self) -> &GCControllerElement

Immutably borrows from an owned value. Read more
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impl Borrow<GCControllerElement> for GCControllerDirectionPad

Available on crate feature GCControllerDirectionPad only.
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fn borrow(&self) -> &GCControllerElement

Immutably borrows from an owned value. Read more
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impl Borrow<GCControllerElement> for GCControllerTouchpad

Available on crate feature GCControllerTouchpad only.
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fn borrow(&self) -> &GCControllerElement

Immutably borrows from an owned value. Read more
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impl Borrow<GCControllerElement> for GCDeviceCursor

Available on crate features GCControllerDirectionPad and GCDeviceCursor only.
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fn borrow(&self) -> &GCControllerElement

Immutably borrows from an owned value. Read more
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impl Borrow<GCControllerElement> for GCDualSenseAdaptiveTrigger

Available on crate features GCControllerButtonInput and GCDualSenseAdaptiveTrigger only.
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fn borrow(&self) -> &GCControllerElement

Immutably borrows from an owned value. Read more
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impl Borrow<NSObject> for GCControllerElement

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fn borrow(&self) -> &NSObject

Immutably borrows from an owned value. Read more
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impl ClassType for GCControllerElement

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const NAME: &'static str = "GCControllerElement"

The name of the Objective-C class that this type represents. Read more
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type Super = NSObject

The superclass of this class. Read more
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type ThreadKind = <<GCControllerElement as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread. Read more
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fn class() -> &'static AnyClass

Get a reference to the Objective-C class that this type represents. Read more
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fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.
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impl Debug for GCControllerElement

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

Formats the value using the given formatter. Read more
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impl Deref for GCControllerElement

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type Target = NSObject

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl Hash for GCControllerElement

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Message for GCControllerElement

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fn retain(&self) -> Retained<Self>
where Self: Sized,

Increment the reference count of the receiver. Read more
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impl NSObjectProtocol for GCControllerElement

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fn isEqual(&self, other: Option<&AnyObject>) -> bool
where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object. Read more
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fn hash(&self) -> usize
where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure. Read more
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fn isKindOfClass(&self, cls: &AnyClass) -> bool
where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses. Read more
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fn is_kind_of<T>(&self) -> bool
where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref
Check if the object is an instance of the class type, or one of its subclasses. Read more
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fn isMemberOfClass(&self, cls: &AnyClass) -> bool
where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses. Read more
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fn respondsToSelector(&self, aSelector: Sel) -> bool
where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector. Read more
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fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool
where Self: Sized + Message,

Check whether the object conforms to a given protocol. Read more
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fn description(&self) -> Retained<NSObject>
where Self: Sized + Message,

A textual representation of the object. Read more
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fn debugDescription(&self) -> Retained<NSObject>
where Self: Sized + Message,

A textual representation of the object to use when debugging. Read more
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fn isProxy(&self) -> bool
where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject. Read more
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fn retainCount(&self) -> usize
where Self: Sized + Message,

The reference count of the object. Read more
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impl PartialEq for GCControllerElement

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF

The Objective-C type-encoding for a reference of this type. Read more
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impl DowncastTarget for GCControllerElement

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impl Eq for GCControllerElement

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'a, T> AnyThread for T
where T: ClassType<ThreadKind = dyn AnyThread + 'a> + ?Sized,

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fn alloc() -> Allocated<Self>
where Self: Sized + ClassType,

Allocate a new instance of the class. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> AutoreleaseSafe for T
where T: ?Sized,