Struct NSImageCell

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pub struct NSImageCell { /* private fields */ }

Available on crate features NSCell and NSImageCell only.

Expand description

Apple’s documentation

Implementations§

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impl NSImageCell

Methods declared on superclass NSCell.

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

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pub fn initTextCell(this: Allocated<Self>, string: &NSString) -> Retained<Self>

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pub fn initImageCell( this: Allocated<Self>, image: Option<&NSImage>, ) -> Retained<Self>

Available on crate feature NSImage only.

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

§Safety

coder possibly has further requirements.

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impl NSImageCell

Methods declared on superclass NSObject.

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

Methods from Deref<Target = NSCell>§

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

Available on crate features NSResponder and NSView only.

§Safety

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

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pub unsafe fn setControlView(&self, control_view: Option<&NSView>)

Available on crate features NSResponder and NSView only.

target should be of the correct type.

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Setter for isEnabled.

Available on crate feature NSText only.

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pub fn setAlignment(&self, alignment: NSTextAlignment)

Available on crate feature NSText only.

Setter for alignment.

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pub fn wraps(&self) -> bool

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pub fn setWraps(&self, wraps: bool)

Setter for wraps.

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pub fn font(&self) -> Option<Retained<NSFont>>

Available on crate feature NSFont only.

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pub fn setFont(&self, font: Option<&NSFont>)

Available on crate feature NSFont only.

Setter for font.

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pub fn keyEquivalent(&self) -> Retained<NSString>

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pub fn formatter(&self) -> Option<Retained<NSFormatter>>

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pub fn setFormatter(&self, formatter: Option<&NSFormatter>)

Setter for stringValue.

This is copied when set.

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Available on crate feature NSImage only.

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pub fn setImage(&self, image: Option<&NSImage>)

Available on crate feature NSImage only.

Setter for image.

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pub fn controlSize(&self) -> NSControlSize

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pub fn setControlSize(&self, control_size: NSControlSize)

Setter for controlSize.

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

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

Setter for representedObject.

§Safety

represented_object should be of the correct type.

Available on crate features NSColor and NSResponder and NSView only.

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pub fn calcDrawInfo(&self, rect: NSRect)

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pub fn setUpFieldEditorAttributes(&self, text_obj: &NSText) -> Retained<NSText>

Available on crate features NSResponder and NSText and NSView only.

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Available on crate features NSEvent and NSMenu and NSResponder and NSView only.

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pub fn sendsActionOnEndEditing(&self) -> bool

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pub fn setSendsActionOnEndEditing(&self, sends_action_on_end_editing: bool)

Setter for sendsActionOnEndEditing.

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pub fn baseWritingDirection(&self) -> NSWritingDirection

Available on crate feature NSText only.

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pub fn setBaseWritingDirection( &self, base_writing_direction: NSWritingDirection, )

Available on crate feature NSText only.

Setter for baseWritingDirection.

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pub fn lineBreakMode(&self) -> NSLineBreakMode

Available on crate feature NSParagraphStyle only.

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pub fn setLineBreakMode(&self, line_break_mode: NSLineBreakMode)

Available on crate feature NSParagraphStyle only.

pub fn setUserInterfaceLayoutDirection( &self, user_interface_layout_direction: NSUserInterfaceLayoutDirection, )

Available on crate feature NSUserInterfaceLayout only.

Setter for userInterfaceLayoutDirection.

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pub fn fieldEditorForView( &self, control_view: &NSView, ) -> Option<Retained<NSTextView>>

Available on crate features NSResponder and NSText and NSTextView and NSView only.

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pub fn usesSingleLineMode(&self) -> bool

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pub fn setUsesSingleLineMode(&self, uses_single_line_mode: bool)

Setter for usesSingleLineMode.

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pub fn draggingImageComponentsWithFrame_inView( &self, frame: NSRect, view: &NSView, ) -> Retained<NSArray<NSDraggingImageComponent>>

Available on crate features NSDraggingItem and NSResponder and NSView only.

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pub fn hitTestForEvent_inRect_ofView( &self, event: &NSEvent, cell_frame: NSRect, control_view: &NSView, ) -> NSCellHitResult

Available on crate features NSEvent and NSResponder and NSView only.

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pub fn expansionFrameWithFrame_inView( &self, cell_frame: NSRect, view: &NSView, ) -> NSRect

Available on crate features NSResponder and NSView only.

👎Deprecated: The controlTint property is not respected on 10.14 and later. For custom cells, use +[NSColor controlAccentColor] to respect the user’s preferred accent color when drawing.

👎Deprecated

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

Available on crate feature NSAccessibilityConstants only.

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.

Available on crate feature NSAccessibilityConstants only.

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,

Available on crate feature NSAccessibilityConstants only.

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`
    }
}