#[repr(C)]pub struct UIPrintPageRenderer { /* private fields */ }
UIPrintPageRenderer
only.Expand description
Implementations§
Source§impl UIPrintPageRenderer
impl UIPrintPageRenderer
pub unsafe fn headerHeight(&self) -> CGFloat
objc2-core-foundation
only.Sourcepub unsafe fn setHeaderHeight(&self, header_height: CGFloat)
Available on crate feature objc2-core-foundation
only.
pub unsafe fn setHeaderHeight(&self, header_height: CGFloat)
objc2-core-foundation
only.Setter for headerHeight
.
objc2-core-foundation
only.Available on crate feature objc2-core-foundation
only.
objc2-core-foundation
only.Setter for footerHeight
.
pub unsafe fn paperRect(&self) -> CGRect
objc2-core-foundation
only.pub unsafe fn printableRect(&self) -> CGRect
objc2-core-foundation
only.pub unsafe fn numberOfPages(&self) -> NSInteger
pub unsafe fn printFormatters( &self, ) -> Option<Retained<NSArray<UIPrintFormatter>>>
UIPrintFormatter
only.Sourcepub unsafe fn setPrintFormatters(
&self,
print_formatters: Option<&NSArray<UIPrintFormatter>>,
)
Available on crate feature UIPrintFormatter
only.
pub unsafe fn setPrintFormatters( &self, print_formatters: Option<&NSArray<UIPrintFormatter>>, )
UIPrintFormatter
only.Setter for printFormatters
.
pub unsafe fn printFormattersForPageAtIndex( &self, page_index: NSInteger, ) -> Option<Retained<NSArray<UIPrintFormatter>>>
UIPrintFormatter
only.pub unsafe fn addPrintFormatter_startingAtPageAtIndex( &self, formatter: &UIPrintFormatter, page_index: NSInteger, )
UIPrintFormatter
only.pub unsafe fn currentRenderingQualityForRequestedRenderingQuality( &self, requested_rendering_quality: UIPrintRenderingQuality, ) -> UIPrintRenderingQuality
pub unsafe fn prepareForDrawingPages(&self, range: NSRange)
pub unsafe fn drawPageAtIndex_inRect( &self, page_index: NSInteger, printable_rect: CGRect, )
objc2-core-foundation
only.pub unsafe fn drawPrintFormatter_forPageAtIndex( &self, print_formatter: &UIPrintFormatter, page_index: NSInteger, )
UIPrintFormatter
only.pub unsafe fn drawHeaderForPageAtIndex_inRect( &self, page_index: NSInteger, header_rect: CGRect, )
objc2-core-foundation
only.pub unsafe fn drawContentForPageAtIndex_inRect( &self, page_index: NSInteger, content_rect: CGRect, )
objc2-core-foundation
only.objc2-core-foundation
only.Methods from Deref<Target = NSObject>§
Sourcepub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
Handle messages the object doesn’t recognize.
See Apple’s documentation for details.
Methods from Deref<Target = AnyObject>§
Sourcepub fn class(&self) -> &'static AnyClass
Available on crate feature UIIndirectScribbleInteraction
only.
pub fn class(&self) -> &'static AnyClass
UIIndirectScribbleInteraction
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());
Sourcepub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
👎Deprecated: this is difficult to use correctly, use Ivar::load
instead.Available on crate feature UIIndirectScribbleInteraction
only.
pub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
Ivar::load
instead.UIIndirectScribbleInteraction
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.
Sourcepub fn downcast_ref<T>(&self) -> Option<&T>where
T: DowncastTarget,
Available on crate feature UIIndirectScribbleInteraction
only.
pub fn downcast_ref<T>(&self) -> Option<&T>where
T: DowncastTarget,
UIIndirectScribbleInteraction
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`
}
}
Trait Implementations§
Source§impl AsRef<AnyObject> for UIPrintPageRenderer
impl AsRef<AnyObject> for UIPrintPageRenderer
Source§impl AsRef<NSObject> for UIPrintPageRenderer
impl AsRef<NSObject> for UIPrintPageRenderer
Source§impl Borrow<AnyObject> for UIPrintPageRenderer
impl Borrow<AnyObject> for UIPrintPageRenderer
Source§impl Borrow<NSObject> for UIPrintPageRenderer
impl Borrow<NSObject> for UIPrintPageRenderer
Source§impl ClassType for UIPrintPageRenderer
impl ClassType for UIPrintPageRenderer
Source§const NAME: &'static str = "UIPrintPageRenderer"
const NAME: &'static str = "UIPrintPageRenderer"
Source§type ThreadKind = dyn MainThreadOnly
type ThreadKind = dyn MainThreadOnly
Source§impl Debug for UIPrintPageRenderer
impl Debug for UIPrintPageRenderer
Source§impl Deref for UIPrintPageRenderer
impl Deref for UIPrintPageRenderer
Source§impl Hash for UIPrintPageRenderer
impl Hash for UIPrintPageRenderer
Source§impl Message for UIPrintPageRenderer
impl Message for UIPrintPageRenderer
Source§impl NSObjectProtocol for UIPrintPageRenderer
impl NSObjectProtocol for UIPrintPageRenderer
Source§fn isEqual(&self, other: Option<&AnyObject>) -> bool
fn isEqual(&self, other: Option<&AnyObject>) -> bool
Source§fn hash(&self) -> usize
fn hash(&self) -> usize
Source§fn isKindOfClass(&self, cls: &AnyClass) -> bool
fn isKindOfClass(&self, cls: &AnyClass) -> bool
Source§fn is_kind_of<T>(&self) -> bool
fn is_kind_of<T>(&self) -> bool
isKindOfClass
directly, or cast your objects with AnyObject::downcast_ref
Source§fn isMemberOfClass(&self, cls: &AnyClass) -> bool
fn isMemberOfClass(&self, cls: &AnyClass) -> bool
Source§fn respondsToSelector(&self, aSelector: Sel) -> bool
fn respondsToSelector(&self, aSelector: Sel) -> bool
Source§fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool
fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool
Source§fn debugDescription(&self) -> Retained<NSObject>
fn debugDescription(&self) -> Retained<NSObject>
Source§impl PartialEq for UIPrintPageRenderer
impl PartialEq for UIPrintPageRenderer
Source§impl RefEncode for UIPrintPageRenderer
impl RefEncode for UIPrintPageRenderer
Source§const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF
const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF
impl DowncastTarget for UIPrintPageRenderer
impl Eq for UIPrintPageRenderer
Auto Trait Implementations§
impl !Freeze for UIPrintPageRenderer
impl !RefUnwindSafe for UIPrintPageRenderer
impl !Send for UIPrintPageRenderer
impl !Sync for UIPrintPageRenderer
impl !Unpin for UIPrintPageRenderer
impl !UnwindSafe for UIPrintPageRenderer
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<'a, T> MainThreadOnly for T
impl<'a, T> MainThreadOnly for T
Source§fn mtm(&self) -> MainThreadMarker
fn mtm(&self) -> MainThreadMarker
MainThreadMarker
from the main-thread-only object. Read more