Struct QuartzFilterView

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pub struct QuartzFilterView { /* private fields */ }

Available on crate features QuartzFilterManager and QuartzFilters only.

Expand description

Apple’s documentation

Implementations§

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impl QuartzFilterView

Methods declared on superclass NSView.

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pub unsafe fn initWithFrame( this: Allocated<Self>, frame_rect: NSRect, ) -> Retained<Self>

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

§Safety

coder possibly has further requirements.

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impl QuartzFilterView

Methods declared on superclass NSResponder.

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

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impl QuartzFilterView

Methods declared on superclass NSObject.

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

Methods from Deref<Target = NSView>§

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pub fn window(&self) -> Option<Retained<NSWindow>>

Available on crate features NSResponder and NSWindow only.

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pub unsafe fn superview(&self) -> Option<Retained<NSView>>

Available on crate feature NSResponder only.

§Safety

pub fn setHidden(&self, hidden: bool)

Available on crate feature NSResponder only.

Setter for isHidden.

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pub fn isHiddenOrHasHiddenAncestor(&self) -> bool

Available on crate feature NSResponder only.

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pub unsafe fn getRectsBeingDrawn_count( &self, rects: mut const CGRect, count: *mut isize, )

Available on crate feature NSResponder only.

§Safety

rects must be a valid pointer or null.
count must be a valid pointer or null.

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pub unsafe fn sortSubviewsUsingFunction_context( &self, compare: unsafe extern "C-unwind" fn(NonNull<NSView>, NonNull<NSView>, mut c_void) -> NSComparisonResult, context: mut c_void, )

Available on crate feature NSResponder only.

§Safety

compare must be implemented correctly.
context must be a valid pointer or null.

Setter for postsFrameChangedNotifications.

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pub fn resizeSubviewsWithOldSize(&self, old_size: CGSize)

Available on crate feature NSResponder only.

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Available on crate feature NSResponder only.

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pub fn frame(&self) -> CGRect

Available on crate feature NSResponder only.

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pub fn setFrame(&self, frame: CGRect)

Available on crate feature NSResponder only.

Available on crate feature NSResponder only.

Available on crate feature NSResponder only.

Setter for canDrawConcurrently.

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pub fn canDraw(&self) -> bool

👎Deprecated:

If a view needs display, -drawRect: or -updateLayer will be called automatically when the view is able to draw. To check whether a view is in a window, call -window. To check whether a view is hidden, call -isHiddenOrHasHiddenAncestor.

Available on crate feature NSResponder only.

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pub fn setNeedsDisplayInRect(&self, invalid_rect: CGRect)

Available on crate feature NSResponder only.

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pub fn needsDisplay(&self) -> bool

Available on crate feature NSResponder only.

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Available on crate feature NSResponder only.

The portion of the view that isn’t clipped by its superviews.

Visibility, as reflected by this property, doesn’t account for whether other view or window objects overlap the current view or whether the current view is installed in a window at all. This value of this property is NSZeroRect if the current view is effectively hidden.

👎Deprecated:

Use NSScrollView to achieve scrolling views.

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pub fn setAcceptsTouchEvents(&self, accepts_touch_events: bool)

👎Deprecated:

Use allowedTouchTypes instead

Available on crate feature NSResponder only.

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pub fn canDrawSubviewsIntoLayer(&self) -> bool

Available on crate feature NSResponder only.

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pub fn setCanDrawSubviewsIntoLayer(&self, can_draw_subviews_into_layer: bool)

Available on crate feature NSResponder only.

Setter for canDrawSubviewsIntoLayer.

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pub fn layoutSubtreeIfNeeded(&self)

Available on crate feature NSResponder only.

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pub fn allowsVibrancy(&self) -> bool

Available on crate feature NSResponder only.

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pub fn viewDidChangeEffectiveAppearance(&self)

Available on crate feature NSResponder only.

Override point for reacting to the effective appearance of the receiver changing. At this point effectiveAppearance property reflects the new appearance.

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pub unsafe fn nextKeyView(&self) -> Option<Retained<NSView>>

Available on crate feature NSResponder only.

§Safety

This is not retained internally, you must ensure the object is still alive.

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pub unsafe fn setNextKeyView(&self, next_key_view: Option<&NSView>)

Available on crate feature NSResponder only.

Available on crate feature NSResponder only.

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pub fn setKeyboardFocusRingNeedsDisplayInRect(&self, rect: CGRect)

Available on crate feature NSResponder only.

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pub fn focusRingType(&self) -> NSFocusRingType

Available on crate features NSGraphics and NSResponder only.

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pub fn setFocusRingType(&self, focus_ring_type: NSFocusRingType)

Available on crate features NSGraphics and NSResponder only.

Available on crate feature NSResponder only.

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pub fn discardCursorRects(&self)

Available on crate feature NSResponder only.

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pub fn resetCursorRects(&self)

Available on crate feature NSResponder only.

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pub unsafe fn addTrackingRect_owner_userData_assumeInside( &self, rect: CGRect, owner: &AnyObject, data: *mut c_void, flag: bool, ) -> isize

Available on crate feature NSResponder only.

§Safety

owner should be of the correct type.
data must be a valid pointer or null.

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pub fn removeTrackingRect(&self, tag: isize)

Available on crate feature NSResponder only.

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pub unsafe fn dragImage_at_offset_event_pasteboard_source_slideBack( &self, image: &NSImage, view_location: CGPoint, initial_offset: CGSize, event: &NSEvent, pboard: &NSPasteboard, source_obj: &AnyObject, slide_flag: bool, )

👎Deprecated:

Use -beginDraggingSessionWithItems:event:source: instead

Available on crate features NSEvent and NSImage and NSPasteboard and NSResponder only.

§Safety

source_obj should be of the correct type.

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pub fn dragFile_fromRect_slideBack_event( &self, filename: &NSString, rect: CGRect, flag: bool, event: &NSEvent, ) -> bool

👎Deprecated:

Use -beginDraggingSessionWithItems:event:source: instead

Available on crate features NSEvent and NSResponder only.

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pub unsafe fn dragPromisedFilesOfTypes_fromRect_source_slideBack_event( &self, type_array: &NSArray<NSString>, rect: CGRect, source_object: &AnyObject, flag: bool, event: &NSEvent, ) -> bool

👎Deprecated:

Use -beginDraggingSessionWithItems:event:source: with an NSFilePromiseProvider instead

Available on crate features NSEvent and NSResponder only.

👎Deprecated:

This has always returned NO and had no effect on macOS

Available on crate feature NSResponder only.

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pub fn shouldDrawColor(&self) -> bool

👎Deprecated:

This method no longer does anything

Available on crate feature NSResponder only.

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pub fn gState(&self) -> isize

👎Deprecated

Available on crate feature NSResponder only.

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pub fn allocateGState(&self)

👎Deprecated

Available on crate feature NSResponder only.

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pub fn setUpGState(&self)

👎Deprecated

Available on crate feature NSResponder only.

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pub fn renewGState(&self)

👎Deprecated

Available on crate feature NSResponder only.

Methods from Deref<Target = NSResponder>§

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

§Safety

This is not retained internally, you must ensure the object is still alive.

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

Setter for nextResponder.

§Safety

This is unretained, you must ensure the object is kept alive while in use.

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

§Safety

action must be a valid selector.
object should be of the correct type.

Handle a key event that should present a context menu at the user focus.

Most applications should not override this method. Instead, you should customize the context menu displayed from a keyboard event by implementing menuForEvent: and selectionAnchorRect, or showContextMenuForSelection:, rather than this method.

You should only override this method when you do not want the system-provided default behavior for the context menu hotkey, either for a specific key combination, or for the hotkey in general. For example, if your application already provides a different behavior for control-Return (the default context menu hotkey definition), and you want to preserve that behavior, you should override this method to handle that specific key combination, and then return without calling super. Note that the user may customize the hotkey to a different key combination, so in this example, if any other key combination is passed to your method, you would call super.

An implementation of this method should call [super contextMenuKeyDown:event] to pass the request up the responder chain. If the message reaches the application object, NSApplication’s implementation of this method will send showContextMenuForSelection: to the responder chain. If you do not call super, then no further handling of the key event will be performed.

Note: In some cases, showContextMenuForSelection: will be called without a prior call to contextMenuKeyDown:. This occurs when a view receives an Accessibility ShowMenu action, or when the user has created a Cocoa Text key binding to map a different key combination to the showContextMenuForSelection: action.

Parameter event: The key down event that matches the system-wide context menu hotkey combination.

See also: showContextMenuForSelection:

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

§Safety

event_selector must be a valid selector.

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pub fn interpretKeyEvents(&self, event_array: &NSArray<NSEvent>)

Available on crate feature NSEvent only.

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Available on crate feature NSEvent only.

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pub fn shouldBeTreatedAsInkEvent(&self, event: &NSEvent) -> bool

Available on crate feature NSEvent only.

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pub fn wantsScrollEventsForSwipeTrackingOnAxis( &self, axis: NSEventGestureAxis, ) -> bool

Available on crate feature NSEvent only.

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pub fn wantsForwardedScrollEventsForAxis( &self, axis: NSEventGestureAxis, ) -> bool

Available on crate feature NSEvent only.

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

§Safety

action must be a valid selector.
sender should be of the correct type.

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`
    }
}