Struct GCEventViewController

#[repr(C)]
pub struct GCEventViewController { /* private fields */ }

Available on crate feature GCEventViewController and crate feature objc2-app-kit and macOS only.

A view controller subclass that allows fine grained control of the user interface system’s handling of game controller events. Set an instance of this class as your root view controller if you intend to use GCController APIs for handling game controllers.

See also Apple’s documentation

Implementations

impl GCEventViewController

pub unsafe fn controllerUserInteractionEnabled(&self) -> bool

Controllers can be used to control the general UIKit user interface and for many views that is the default behavior. By using a controller event view controller you get fine grained control over whether the controller events go trough the UIEvent & UIResponder chain, or if they are decoupled from the UI and all incoming data is served via GCController.

Defaults to NO - suppressing UIEvents from game controllers and presenting them via the GCController API whilst this controller’s view or any of it’s subviews are the first responders. If you are not using any UIView components or UIEvents in your application you should leave this as NO and process your game controller events via the normal GCController API.

If set to YES the controller input will start flowing through UIEvent and the UIResponder chain will be used. This gives you fine grained control over the event handling of the controlled view and its subviews. You should stop using GCController instances and the corresponding profiles if you no longer need to read input from them.

Note that unlike UIView.userInteractionEnabled this only controls the flow of game controller events.

See: GCController

See: UIView.userInteractionEnabled

pub unsafe fn setControllerUserInteractionEnabled( &self, controller_user_interaction_enabled: bool, )

Setter for controllerUserInteractionEnabled.

impl GCEventViewController

Methods declared on superclass NSViewController.

pub unsafe fn initWithNibName_bundle( this: Allocated<Self>, nib_name_or_nil: Option<&NSNibName>, nib_bundle_or_nil: Option<&NSBundle>, ) -> Retained<Self>

pub unsafe fn initWithCoder( this: Allocated<Self>, coder: &NSCoder, ) -> Option<Retained<Self>>

impl GCEventViewController

Methods declared on superclass NSResponder.

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

impl GCEventViewController

Methods declared on superclass NSObject.

pub unsafe fn new(mtm: MainThreadMarker) -> Retained<Self>

Methods from Deref<Target = NSViewController>

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

pub unsafe fn nibBundle(&self) -> Option<Retained<NSBundle>>

pub unsafe fn representedObject(&self) -> Option<Retained<AnyObject>>

pub unsafe fn setRepresentedObject( &self, represented_object: Option<&AnyObject>, )

Setter for representedObject.

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

pub unsafe fn setTitle(&self, title: Option<&NSString>)

Setter for title.

pub unsafe fn loadView(&self)

pub unsafe fn loadViewIfNeeded(&self)

pub unsafe fn commitEditingWithDelegate_didCommitSelector_contextInfo( &self, delegate: Option<&AnyObject>, did_commit_selector: Option<Sel>, context_info: *mut c_void, )

pub unsafe fn commitEditing(&self) -> bool

pub unsafe fn discardEditing(&self)

pub unsafe fn viewDidLoad(&self)

pub unsafe fn isViewLoaded(&self) -> bool

pub unsafe fn viewWillAppear(&self)

pub unsafe fn viewDidAppear(&self)

pub unsafe fn viewWillDisappear(&self)

pub unsafe fn viewDidDisappear(&self)

pub unsafe fn preferredContentSize(&self) -> CGSize

pub unsafe fn setPreferredContentSize(&self, preferred_content_size: CGSize)

Setter for preferredContentSize.

pub unsafe fn updateViewConstraints(&self)

pub unsafe fn viewWillLayout(&self)

pub unsafe fn viewDidLayout(&self)

pub unsafe fn presentViewController_animator( &self, view_controller: &NSViewController, animator: &ProtocolObject<dyn NSViewControllerPresentationAnimator>, )

pub unsafe fn dismissViewController(&self, view_controller: &NSViewController)

pub unsafe fn dismissController(&self, sender: Option<&AnyObject>)

pub unsafe fn presentedViewControllers( &self, ) -> Option<Retained<NSArray<NSViewController>>>

pub unsafe fn presentingViewController( &self, ) -> Option<Retained<NSViewController>>

pub unsafe fn presentViewControllerAsSheet( &self, view_controller: &NSViewController, )

pub unsafe fn presentViewControllerAsModalWindow( &self, view_controller: &NSViewController, )

pub unsafe fn parentViewController(&self) -> Option<Retained<NSViewController>>

pub unsafe fn childViewControllers(&self) -> Retained<NSArray<NSViewController>>

pub unsafe fn setChildViewControllers( &self, child_view_controllers: &NSArray<NSViewController>, )

Setter for childViewControllers.

pub unsafe fn addChildViewController( &self, child_view_controller: &NSViewController, )

pub unsafe fn removeFromParentViewController(&self)

pub unsafe fn insertChildViewController_atIndex( &self, child_view_controller: &NSViewController, index: isize, )

pub unsafe fn removeChildViewControllerAtIndex(&self, index: isize)

pub unsafe fn preferredContentSizeDidChangeForViewController( &self, view_controller: &NSViewController, )

pub unsafe fn viewWillTransitionToSize(&self, new_size: CGSize)

pub unsafe fn extensionContext(&self) -> Option<Retained<NSExtensionContext>>

pub unsafe fn preferredScreenOrigin(&self) -> CGPoint

pub unsafe fn setPreferredScreenOrigin(&self, preferred_screen_origin: CGPoint)

Setter for preferredScreenOrigin.

pub unsafe fn preferredMinimumSize(&self) -> CGSize

pub unsafe fn preferredMaximumSize(&self) -> CGSize

Methods from Deref<Target = NSResponder>

pub unsafe fn nextResponder(&self) -> Option<Retained<NSResponder>>

pub unsafe fn setNextResponder(&self, next_responder: Option<&NSResponder>)

Setter for nextResponder.

pub unsafe fn tryToPerform_with( &self, action: Sel, object: Option<&AnyObject>, ) -> bool

pub unsafe fn noResponderFor(&self, event_selector: Sel)

pub unsafe fn acceptsFirstResponder(&self) -> bool

pub unsafe fn becomeFirstResponder(&self) -> bool

pub unsafe fn resignFirstResponder(&self) -> bool

pub unsafe fn flushBufferedKeyEvents(&self)

pub unsafe fn showContextHelp(&self, sender: Option<&AnyObject>)

pub unsafe fn supplementalTargetForAction_sender( &self, action: Sel, sender: Option<&AnyObject>, ) -> Option<Retained<AnyObject>>

pub unsafe fn undoManager(&self) -> Option<Retained<NSUndoManager>>

pub unsafe fn presentError(&self, error: &NSError) -> bool

pub unsafe fn willPresentError(&self, error: &NSError) -> Retained<NSError>

pub unsafe fn performTextFinderAction(&self, sender: Option<&AnyObject>)

pub unsafe fn newWindowForTab(&self, sender: Option<&AnyObject>)

pub unsafe fn showWritingTools(&self, sender: Option<&AnyObject>)

pub unsafe fn performMnemonic(&self, string: &NSString) -> bool

👎Deprecated: This has always returned NO and had no effect on macOS

Methods from Deref<Target = NSObject>

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

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

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());

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.

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

impl AsRef<AnyObject> for GCEventViewController

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<GCEventViewController> for GCEventViewController

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for GCEventViewController

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSResponder> for GCEventViewController

fn as_ref(&self) -> &NSResponder

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSViewController> for GCEventViewController

fn as_ref(&self) -> &NSViewController

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for GCEventViewController

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for GCEventViewController

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl Borrow<NSResponder> for GCEventViewController

fn borrow(&self) -> &NSResponder

Immutably borrows from an owned value.

impl Borrow<NSViewController> for GCEventViewController

fn borrow(&self) -> &NSViewController

Immutably borrows from an owned value.

impl ClassType for GCEventViewController

const NAME: &'static str = "GCEventViewController"

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

type Super = NSViewController

The superclass of this class.

type ThreadKind = <<GCEventViewController as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

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

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl Debug for GCEventViewController

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

Formats the value using the given formatter.

impl Deref for GCEventViewController

type Target = NSViewController

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for GCEventViewController

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

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 Message for GCEventViewController

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSCoding for GCEventViewController

unsafe fn encodeWithCoder(&self, coder: &NSCoder)

where Self: Sized + Message,

unsafe fn initWithCoder( this: Allocated<Self>, coder: &NSCoder, ) -> Option<Retained<Self>>

where Self: Sized + Message,

impl NSEditor for GCEventViewController

unsafe fn discardEditing(&self)

where Self: Sized + Message,

unsafe fn commitEditing(&self) -> bool

where Self: Sized + Message,

unsafe fn commitEditingWithDelegate_didCommitSelector_contextInfo( &self, delegate: Option<&AnyObject>, did_commit_selector: Option<Sel>, context_info: *mut c_void, )

where Self: Sized + Message,

unsafe fn commitEditingAndReturnError(&self) -> Result<(), Retained<NSError>>

where Self: Sized + Message,

impl NSObjectProtocol for GCEventViewController

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

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.

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.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

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.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl NSSeguePerforming for GCEventViewController

unsafe fn prepareForSegue_sender( &self, segue: &NSStoryboardSegue, sender: Option<&AnyObject>, )

where Self: Sized + Message,

unsafe fn performSegueWithIdentifier_sender( &self, identifier: &NSString, sender: Option<&AnyObject>, )

where Self: Sized + Message,

unsafe fn shouldPerformSegueWithIdentifier_sender( &self, identifier: &NSString, sender: Option<&AnyObject>, ) -> bool

where Self: Sized + Message,

impl NSUserInterfaceItemIdentification for GCEventViewController

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

where Self: Sized + Message,

unsafe fn setIdentifier(&self, identifier: Option<&NSString>)

where Self: Sized + Message,

Setter for identifier.

impl PartialEq for GCEventViewController

fn eq(&self, other: &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 RefEncode for GCEventViewController

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

The Objective-C type-encoding for a reference of this type.

impl DowncastTarget for GCEventViewController

impl Eq for GCEventViewController